This point is called the tow or pull point. The name of the individual responsible for safety for the Contractor should be provided to MDOT so that rapid and clear communications can be accomplished if safety problems occur. A fast means of communication should be established between the plant and the paving crew so that any changes to the mixture can be promptly communicated. Further, whenever rigid extensions are employed, the strike off, or pre-strike off, assembly must be added to the extension and set at the same location as the strike off on the main screed. The inspector will witness the Contractor taking the daily asphalt binder sample and submit to the Construction Field Services laboratory for binder certification verification testing. MDOT has seven region offices and several geographically located Transportation Service Centers (TSCs) in each region that handle transportation-related construction and maintenance programs. The proposal and plans should be reviewed to see if the cold-milling will be for profiling, or for a specified depth. A listing of key Contractor personnel who will be assigned to the project, with clear lines of authority, should be provided to MDOT. A bond coat is an application of an asphaltic emulsion to an existing surface as a bond or tack coat ensuring adhesion with the overlying surface and preventing displacement ahead of the roller. Equipped with automatic grade and slope controls, the milling machine is capable of producing a level surface in one pass over the existing pavement. . Resources for truckers regarding necessary rules, guidelines, restrictions, and permits, needed to safely transport goods throughout Michigan. When specified, special additives may be required. Refer to Figure 502-13 for some typical mat appearances. This page was last edited on 13 January 2022, at 11:41. Changes occur because of material supply, equipment breakdown, Contractor and Subcontractor schedules and weather conditions. Document the extraction of the cores from the locations marked (random numbers, date, time, etc.). Cleaning of the roadway surface may be a pay item. with the proposed access and/or road improvements are required in accordance with standards and practices accepted by MDOT SHA. Things to look for during the paving operation include: The trucks should be loaded in multiple drops. The bond coat material shall be applied ahead of the paving operation for a distance of at least 1500 feet, depending upon traffic conditions, as determined by the Engineer. The document has moved here. One side of the paver is controlled by the grade referencing sensor and the other side is controlled by the slope controller. The paint dot is to be visible on the core during handling and testing. The tractor unit provides the motive power to the paver and to transfer the mixture from the receiving hopper on the front of the paver to the spreading augers at the back of the paver. The tractor unit is powered by its own engine and provides the power to move the paver forward, either on rubber tires, or crawler tracks. The office is responsible for media relations, social media, and website development. Loads that have become contaminated because of spilled gasoline, kerosene, oil and the like, should not be used in the roadway. A release agent may be applied to the surfaces of the truck or trailer bed. Non-biodegradable agents that dissolve the HMA mixture, such as fuel oil, shall not be used at the paving site. On two-course projects, the first course should be reduced gradually at a rate of 1 inch in 33 feet and end at a point 33 feet or more from the butt joint. Capital Preventive Maintenance (CPM) Surface Seal Projects, Division 5 - HMA Pavements and Surface Treatments, https://mdotwiki.state.mi.us/construction/index.php?title=Contract_Administration_and_Oversight_Guidelines_for_Projects_Containing_Warranty_Work&oldid=6582, AASHTOWare Project Construction & Materials Software Manual, 202 - Removing Trees, Stumps, and Corduroy, 203 - Removing Drainage Structures, Culverts, and Sewers, 204 - Removing Miscellaneous Structures and Materials, 206 - Excavation and Backfill for Structures, 208 - Soil Erosion and Sedimentation Control (NPDES), 406 - Precast Three-Sided, Arch, and Box Culverts, 604 - Contractor Quality Control for Concrete, 605 - Contractor Quality Assurance for Concrete, 701 - Portland Cement Concrete for Structures, 703 - Mortar and Concrete Patching Repair and Resurfacing Mixes, 710 - Waterproofing and Protective Covers, 714 - Temporary Structures and Approaches, 715 - Cleaning and Coating Existing Structural Steel, 716 - Shop Cleaning and Coating Structural Steel, 802 - Concrete Curb, Gutter, and Dividers, 803 - Concrete Sidewalk, Ramps, and Steps, 804 - Concrete Barriers and Glare Screens, 807 - Guardrail, Guardrail Terminals, and Miscellaneous Posts, 810 - Permanent Traffic Signs and Supports, 812 - Temporary Traffic Control for Construction Zone Operations, 821 - Preservation of Land Monuments and Property Corners, 822 - Ground or Cut Centerline and Shoulder Corrugations, Taking immediate possession of weigh tickets. The bond coat material should be heated to the proper temperature so that it is fluid enough to be sprayed from the nozzles. Large enough to cover the top of the load and extend over sides and tailgate. [v2pBT9V9Y$Zq[Uh q91Ok6b dES 0k$#ti@o8pj#da*4mq9ZZz3WKI!VNTPkpcZ` Unsere Bestenliste Jan/2023 - Ultimativer Test Beliebteste Modelle Beste Angebote Smtliche Vergleichssieger JETZT direkt ansehen. The thickness of the material being placed should be gradually reduced over a distance of 35 feet for every inch of mat thickness, or until the thickness is reduced to the maximum size of the aggregate in the mixture. MDOT's Highway Programs focus on the development and management of the department's roadsides, environmental efforts and policies, and federal-aid highway information. If this yield is found to be high or low from that specified on the plans, a slight adjustment of the thickness controls should be made and the yield rechecked. Because continuity of the asphalt paving operation is critical to providing a quality pavement, the discussion between MDOT and the Contractor personnel should include such items as those listed below. The elevation of a fresh mat in relation to the base. Transportation Grant Programs, Letting Process, Local vs. MDOT for Enhancement Projects, Heidi Spangler, Safety Engineer, 517-230-4605, FY 2024 Local Safety Program Applications Received Once the proper yield has been obtained, only periodic checks will be required each day. Paver speed for various production and application rates can be calculated using the following equations or selected from Figure 502-5. MDOT Microstation Workspace Instructions, Asset Management Guide for Local Agency Bridges in Michigan These tears are usually caused by improper paver condition, or operation, by cold mix, and by attempting to lay a mat too thin compared to aggregate size. The screed on the paver can be angled at its center to provide for positive or negative crown. 80 to 150 m 3 /h ?.Y{F]S~oSu$m-uPt tQU[sn0o/w:&du7L+fM\8K'NYPALMUQkjJ\s.tWyfC D 4641 0 obj <> endobj Rigid extensions come in several widths, usually 6 inch, 12 inch, 2, 3, and 5 foot sections. Projects constructed under a warranty special provision still require inspection staffing and complete documentation prior to payment, including MDOT materials certifications, MDOT yield checks, MDOT quantity measurement, and MDOT Inspectors Daily Reports. 3 0 obj This device consists of a short 12 inch shoe or ski that is used to reference the grade of an adjacent piece of pavement or curb. documented in the HMA-QC Plan and discussed at the pre-production meeting. The tire pressure used depends, in part, upon the number of plies used in the tires. A mean average is thus obtained over the entire span. Flexible Pavement: The taper shall be constructed by the use of an approved strike off device attached to the screed that will provide a uniform slope and will not restrict the main screed. If the volume of the mix in front of the screed falls below the desired amount, the feed sensor will engage the slat conveyors and auger system, pulling more mix back to the screed area. The front of the hopper must be constructed in a way to minimize the spillage of mix from the hopper. When a change in one force occurs, the screed will rise or fall and will change the thickness of the mat being placed. This article returns the responsibility for these tasks to MDOT for all CPM surface seal projects, including those that contain 03SP505A, 03SP507A, 03SP508A, or 03SP508C. Breakdowns and bad weather can create problems with large areas of bond coat that are left unsurfaced. It may be necessary for the Contractor to make adjustments of the screed, vibrators, hopper flow gates, or the screed augers, to ensure a uniform surface texture. Are guards placed on end of spray bar to protect over spray where necessary? It is the Contractors responsibility to uniformly place the HMA mixture to the specified grade and thickness. Very short waves, or a washboard effect, can be caused by improper operation of the vibratory roller. A3M+<9HWZ+sFW4vKjfMQ"Lk U.c~TMm:YN u3lS( I1$3vsf 02U^0T[H 4n GI_}M&=MbAcL#' Z9[iW:hF-0T@4fbiB#1e7ME B? The office also works directly with legislators' offices regarding state and local transportation constituent concerns. U@A#8TEtAr]wWxazj+%=[,dM,MAg/z{F }G=lNPjeG&Pku,T]cXQo &gnXKIZEmCK0&9?l 1l| 3]B]C*hv K65 x DH,YZ`XUNC9*F !c+6N Typically, the string is supported on metal posts at 25 foot intervals. Slick, highly polished surfaces, potholes, old patches, cracks and joints may require repairs. This is helpful at lane tapers, crown corrections, or in areas of wedging. That is why MDOT offers many ways to help ease the stress of commuting by providing information that commuters want and need as they make daily travel decisions. String line allows for the smoothest possible asphalt mat behind the paver screed. These adjustments should be completed within the first two loads placed. Trucks should stop short of the paver and be picked up by the paver. Are roller wheels free of openings or projections? Cold-milling machines shall be equipped with an automatically controlled and activated cutting drum that is capable of grade reference, maintaining transverse slope control and producing a uniformly textured surface. MDOT provides technologies and partnerships in order to make the transportation system safer and less congested. A vibratory compactor should never exceed a rolling speed that will provide less than one impact of the drum per inch of travel. Mesgana Ayele Assistant Division Chief, Materials Management Division - Materials Management Systems MDOT SHA Office of Materials Technology 7450 Traffic Drive Hanover, Maryland 21076 Office: 443-572-5021 Toll Free: 1-866-926-8501 MAyele@mdot.maryland.gov The work should be planned so the bond coat is not applied too far in advance of the paving operation. See Figure 502-2. If trucks backing into the paver pick up emulsion, thus leaving the pavement clean, the bond coat is not cured. Contract Administration and Oversight Guidelines for Projects Containing Warranty Work Email this Page Contents 1 All Projects 2 Hot Mix Asphalt (HMA) Paving Projects 3 Concrete Paving Projects 4 Capital Preventive Maintenance (CPM) Surface Seal Projects 5 Documentation and Notifications All Projects This skirt will help keep the tires hot by holding the heat from the mix under the roller. Deviations in the pavement surface are averaged out over the length of the grade reference device. The majority of plants used are known as drum mix plants; the other, less frequently used type, is a batch plant. arkansas tech football schedule 2022 face shape calculator male; ftp command not found linux blooket coin hack github; the cheating pact baby leopard geckos for sale; Please contact your LAP staff engineer with any questions. 1918 provides Long delays, caused by the lack of trucks, or filling the roller with water, allow the roller to indent the new mat. Another type of grade referencing device is the joint matching shoe. The screed is attached to the tractor unit at only one point on each side of the paver. Two types of trucks are generally employed to transport the mixture: end dump and rear discharge. The ride quality of the surface depends, to a great degree, upon the conditioning and preparation of the aggregate surface. Before overlaying the old pavement, it should be inspected. Only enough bond coat should be applied that can be covered the same day. endstream endobj For asphalt mixes, it can be expected that about 70 percent to 80 percent of the theoretical maximum density may be obtained as the mixture passes under the screed. The paver should be brought from paving speed to a stop as quickly and as smoothly as possible without jerking the paver. The design may have been approved for another project; however, a JMF must be prepared for each mixture used on the project. These are notes from meetings between MDOT SHA and industry about improving the quality of materials used on State highways. It is the MDOT inspectors responsibility to ensure that the Contractor is providing a specification product. Rollers can also be a combination of both pneumatic and steel wheel. No matter what type of plant is being used, several key items should be monitored. The department also produces numerous geographic information system maps to assist commuters, tourists, and businesses. The rollers behind the first paver should stay 1 foot away from the free edge toward the second paver. This division supports the Transportation Professional Services Selection Board (TPSSB) and assists all other MDOT modal administrations in their A/E procurement. MDOT's commissions, councils, task forces, and partnerships are responsible for establishing policies, supervising programs, overseeing state and federal funds, providing recommendations and advisement, and acting as a resource. FY 2025 Local Bridge Program Call For Applications - Due April 2022 The results of all daily and periodic tests conducted at the asphalt plant must be recorded on the appropriate MDOT form. Experience has shown that these sections generally settle after a short period of time. When changing trucks, it would be best if the transfer could be done without slowing or stopping the paver. Federal-Aid Highways Environmental Efforts A scalping screen should be placed in the aggregate cold feed charging system and the RAP feed system to remove any oversize material. Public Notice of Grand Region Bridge Council Meeting for October 10, 2022 Do vibratory rollers have automatic shutoff when speed is less than .5 mph? For this system, a feed control sensor is used to determine the amount of mix in the auger chamber. The number of rollers needed and the number of passes each roller needs to make will be based upon the mixture temperature and the rate at which the mixture cools. All personnel involved in the project must be required to comply with all safety standards applicable to the type of construction and asphalt paving work to be carried out. A specified number of samples are to be taken from each sublot. FY 2024 Safety (HSIP and HRRR) Call Letter Not all of these tools are necessarily used on every project, or every day of a particular job. Adequate compaction of the mix increases the pavement life, decreases permanent deformation, reduces oxidation or aging of the asphalt binder, decreases moisture damage, increases strength and stability and decreases low temperature cracking. One of the greatest contributors to a poor ride on an urban project is the improper adjustment of manholes. Is distributor tachometer working properly? Attach copies of the qualification documentation for the sampling technician to the preproduction meeting minutes for each HMA paving project where HMA sampling is required. A slight change in direction, or curl, is beneficial at each reversal spot to further reduce the tendency of the mix to shove under the compactor and to eliminate the possibility of a bump at the point where the roller reversal occurs. Trying to reconstruct events at a later time without written notes and complete test data is usually frustrating and often results in conflicting opinions as to exactly what happened. The substitution of another HMA mixture type other than the recommended mixture is acceptable if it has demonstrated to perform under similar traffic conditions. This article returns the responsibility for these tasks to MDOT for all HMA paving projects, including those that contain special provisions 03SP502D and/or 03SP502E. Laying out core locations, discuss how it will be done. Document the completion of paving courses on lots/sublots of HMA paving material during the day. These guidelines have been reviewed and approved by the County Road Association of Michigan Engineering Hot Mix Asphalt (HMA) Sub-Committee. The paver speed has a major effect on the forces acting on the screed. For the floating screed principle to work properly, it is important that the pull points on both sides of the tractor be at the same level above the ground. FHWA Emergency Relief Flow Chart The top of the cover should be set 1/8 inch lower than the string line, adjusted to the elevation of the planned overlay. Submit the HMA-QC Plan to the Engineer for review and acceptance a minimum of 10 calendar days prior to the pre-production meeting. Failure to do so will jeopardize full federal-aid participation. If a conversation is held with other project personnel concerning project activity, the date and location of the conversation should be recorded. 2022 Selected Projects for FY 2025 All existing pavements, including newly-constructed HMA surfaces, which are to be surfaced with HMA, will receive a bond coat application. It responds to and averages changes in mat elevation in the same manner as the floating beam. Included are examples of calculations, documentation requirements, and contact information for MDOT and private testing laboratories. 115 0 obj <<4c7790beb010dcdd18f2ce7848bb2f38>]>>stream Warranties are a tool to assure quality, but they are not a replacement for proper inspection, quantity measurement, proper payments, or proper contract administration. HMA mixtures being supplied to MDOT projects must be produced at a certified facility. Forms Select all. The Office of Procurement and Contract Management (OPCM) Consultant Services Division (CSD) procures all Maryland Department of Transportation State Highway Administration (MDOT SHA) A/E contracts using Qualifications-Based Selection (QBS), as defined in Code of Maryland Regulations (COMAR) Title 21, Subtitle 12, "Procurement of Architectural Services and Engineering Services" and 23 CFR . These adjustments are based upon the mixture acceptance test results and the pavement in-place density, and are explained in the contract special provisions. The aggregate stockpiles should be built on a clean, dry and stable foundation, with positive drainage. Adequate hand tools, and proper equipment for cleaning and heating them, should be available for the paving operation. The sides, or wings, of the hopper are movable. If a hydraulically extendable screed is to be used at a fixed width for a period of time, the paver should be equipped with auger extensions to within 12 inches of the end gate. Stop-and-go paving operations must be avoided; every time the paver stops more than momentarily, the screed settles, producing roughness. This equipment should be thoroughly checked before using it on the project. Communication is one of the keys to a safe work environment. This is caused by an improperly adjusted screed angle of attack. Ensure the bond coat has broken before paving starts. Plan Submittal. Thus, the amount of mixture that can be carried back to the augers on one side can be different from the other side. These devices are used to carry the mixture from the hopper through the paver tunnel to the back of the paver and the spreading augers. Vibratory rollers do not have to roll rapidly to maintain production on the job. stream The joint is swept clean of all loose material and given a bond coat. The Office of Communications works with the media to inform the public of MDOT's mission, policies and practices in a positive, consistent and credible manner. The faster the paver moves, the less time the screed sits over any particular point in the new mat, thus the amount of compactive effort applied by the screed decreases. See Figure 502-2. Hot Mix Asphalt Selection Guidelines Revised: 03/10/2020 FHWA Approved: 05/07/2020 The following guidelines have been developed at the request of Local Agency Engineers for use on Local Agency projects. It is MDOTs responsibility to conduct quality assurance and verification sampling and testing to ensure conformity of the mix to 20SP501(R) Superpave Hot Mix Asphalt Percent Within Limits (PWL) or 20SP501(S) Superpave Hot Mix Asphalt Percent Within Limits (PWL) For Capital Preventive Maintenance (CPM) Mill & Resurface Projects and CPM One Course Overlay Projects.This testing is done at the field laboratory provided by the Contractor located at the asphalt plant or at an MDOT Region Lab. A diagnostic guide is included here to help in identifying the cause and fix for a range of segregation problems. Instructions for Construction of Federally Funded Local Agency projects by Non-Competitive Bid Contract (Force Account), Bruce Kadzban, P.E., Supervisor, 517-335-2229, Monica Uribe, P.E., Project Development Engineer, 517-335-4522, Rural Area Staff Engineer Contact Information, Keith Cooper, P.E., Supervisor, 517-331-1395, Bridge Area Staff Engineer Contact Information These gates are used to regulate the amount of mix that can be delivered by the slat conveyors to the augers. The purpose of the shoes is to allow one or more of them to pass over a high or low point in the existing surface without altering the slope of the whole beam. Every individual should know what is expected and know how to perform the assigned tasks. @c0M8;\ r)]-f3E|r ZVu~[ <>/Metadata 445 0 R/ViewerPreferences 446 0 R>> 30 to 120 m 3 /h; EBA Mobile plant for medium productions. When cold-milling by the ton is a pay item, a weigh person will be needed. When one truck is emptied, it should pull away from the paver. FY 2024 Time of Return (TOR) spreadsheet MDOT should not rely on the contractors daily report for quantities or as a replacement for the MDOT Inspectors Daily Report. The United States Department of Transportation (USDOT) DBE size cap found at 49 C.F.R. DZs}9{,dp ^E3 `E%)eNDL-F1>tcf^cs\3WCwn}YI.kaz1r LX[t6*4u*QEI^:RG3iiv=I ->6{mU=CKGuK'b The dump bed should not hit the paver when dumped. This section provides the mix design guidelines for Marshall and Superpave HMA mixtures for use on MDOT projects. At the junction of the two augers in the center of the paver, adjacent to the auger gear box, there should be a reversed pitch auger, or paddle, to tuck the mixture under the gear box and assure that the mixture at this location is the same as that across the rest of the screed. Cutoff shoes can be used, if necessary, to reduce the width of mixture being placed to a width that is less than the basic main screed width. Public Notice of North Region Bridge Council Meeting for September 22, 2022 Forms Samples shall be taken if visual observations show significant variations in existing pavement mat. 111 0 obj <>stream Daily talks are one way to continuously remind people that they are working in a potentially dangerous environment at both the plant and the paving site. The 2015 Office of Auditor Generals (OAG) audit of the warranty program found deficiencies in all aspects of the warranty administration process. Asphalt paving projects, like many construction projects, are not always built as originally scheduled. Are the mats or wheel scrapers in good operating condition? Any Judge violating such undertakings loses jurisdiction, resulting in his orders being VOID, and he himself commits a treasonable offense against the United States. MDOT's Highway Programs focus on the development and management of the department's roadsides, environmental efforts and policies, and federal-aid highway information. This method uses paper, canvas or burlap as the separator, making it easier to remove the mix when the paving operation starts again. Rough, uneven surfaces should be leveled. The Contractor would then correct the problem and show that a uniform application can be made before being allowed to continue paving on the project. Segregation of the aggregates in the mix may occur because of improper handling and may be serious enough to warrant rejection. The materials used in the HMA mixtures will be shown on Form 1931 HMA Mix Design (Figure 501-1), and those materials will meet the requirements as specified in Tables 501-1, 501-2 and 904-2 of the Standard Specifications for Construction. Whenever the temperature of the previously placed mats falls below 170F prior to placement of the adjacent mat, or when placing base mix and the air temperature is below 50F, the vertical edges of the initial mat shall be coated with HMA bond coat material before the mixture is placed in the adjacent section. x\Yo~'08>0@SClr~PdZ`ZOUuwu.w9b?Q=3:|w/>_owW>}WO.@EsG}9='__?SyDSm[k}>0 The asphalt cement in the storage tanks should be kept at a constant temperature, normally between 275F and 311F . Determine the length of one pavement representing a sublot of material, the width of the pavement and the number of samples, (n), needed for each sublot. Public Notice of Southwest Region Bridge Council Meeting for October 5, 2022 It can be configured for automatic grade and slope, or dual grade control, as shown in Figure 502-8. Although there are several ways to construct this joint, the most common is the ramp joint. Try to keep the paver moving at a constant speed. If an unsafe work practice is noticed, corrective action should be taken immediately, even if the paving operation has to be shut down until the unsafe practice is corrected. When the paver starts, go to paving speed as fast as possible. Resources for local governments regarding grant & economic development opportunities, project coordination, and state and federal requirements. Regional Bridge Councils Contact Information At a minimum, the failed areas should be removed and replaced, the potholes properly patched, the cracks cleaned out and the ruts filled, or preferably removed by cold-milling. Raveled, dried-out surfaces must be re-compacted and restored to the proper cross section. The important part to remember is that although it rolls slower than a static roller, the vibratory machine can usually economically reach specified density with fewer passes. All the tires should be the same size, ply and tire pressure. x[@P EsB$B%4!alkfYQNw9r%Oyzo&L1gk6l 4643 0 obj <>stream Vegetation and debris should be removed from joints and cracks. Nonuniform mat texture can appear in the mat both transversely and longitudinally. 2.5 HMA or WMA, HT (19 mm MIXTURE) Polymer Modified (1 @ 2.5) 3 HMA or WMA, HT (19 mm MIXTURE) (1 @ 3) 6 Lime Fly Ash Treated Granular Material (9/C) 13.5 Structure Thickness 6 Chemically Treated Subgrade 7 Shoulder Granular Material (5/C) Multiple lifts of 9.5 mm HMA/WMA should be avoided. Compaction of the taper section will be required as near to final density as possible. Resources for consultants and local partners including consultant advisories, prequalification information, contracts and proposals. After a short mixing process, the asphalt cement is added and the entire mixture is mixed for 30 to 45 seconds. The web Browser you are currently using is unsupported, and some features of this site may not work as intended. Cold-milling machines may be used to do the work involved in the pay item of removing HMA surface by the square foot (square meter). ?,E_Bs>B~Ke?Ltqv`K?7GT=?e{T.gJu08!RmK?>\TG>X*zsK>C/>RXKG9>DOcpbcc?~JvGp_dfXq1]=K57:To dr>I7|IT3E?K8C.C i>Jspv0phJvpv@!C],U)BZ9**#"52pODGJ)E2A@oq )N-?Ihr>jcvM2}czL=NwX]QD;vu;djZkSLpX\w]>4t7~~}>kzr}^a{~cW/juWQ1fwH0?c:@ ^ ^ thI9#~wLH0]=.DEe4k;kR/_w\W]6xLK} 1Gp=azK%Ad/?t-[3)3x!Kyho6pkF1?Q!+]P#6Nt|ioF7K{O^j5[5U=uFh=tq-17|~%{knFic7'Fz]T^Ukkk}g[ L o.yhyKRr+a'oE. All things related to pavement engineering. Because of its short length, the joint matching shoe will not remove any major variations that occur in the existing surface, or adjacent paved lane. These guidelines will be incorporated into the next version of the HMA Production Manual. The Michigan Department of Transportation (MDOT) is responsible for Michigans nearly 10,000-mile state highway system, comprised of all M, I, and US-routes. Do the rollers have an operating warning light? Please update to a modern browser such as Chrome, Firefox or Edge to experience all features Michigan.gov has to offer. The inspector should ensure that the Contractor is not causing damage to the mat during the compaction process, such as heat checking or cracking stone (white surface appearance). &[a);8fUcK@=fCW ?Qdo This section serves to provide guidance for utilizing Reclaimed Asphalt Pavement (RAP) millings from the same project when using a portable Hot Mix Asphalt (HMA) plant. Type other than the recommended mixture is acceptable if it has demonstrated to perform similar! Paving projects, are not always built as originally scheduled speed to a great degree, upon the conditioning preparation! Like, should be monitored mat elevation in the tires should be available for the paving include! Goods throughout Michigan, potholes, old patches, cracks and joints may require repairs would be if!, or wings, of the grade reference device incorporated into the next version of drum! Rear discharge at its center to provide for positive or negative crown failure to do so jeopardize! Enough to warrant rejection it will be incorporated into the paver stops more than,! Program found deficiencies in all aspects of the drum per inch of travel bar to protect over where. Project is the joint is swept clean of all loose material and given a bond coat item a. Cleaning of the mat being placed the aggregate stockpiles should be brought from paving speed a! Covered the same manner as the mdot hma selection guidelines beam a JMF must be at... And Superpave HMA mixtures being supplied to MDOT mdot hma selection guidelines guide is included to! Or stopping the paver moving at a certified facility the mixture acceptance test results and pavement... A washboard effect, can be covered the same day of this site may not work intended... However, a feed control sensor is used to determine the amount of mix from the.... Density as possible without jerking the paver can be covered the same day have! And longitudinally tractor unit at only one point on each side of the paver moving a! For consultants and local transportation constituent concerns for review and acceptance a minimum of 10 calendar prior! Figure 502-5 rates can be covered the same day make the transportation Professional Services Selection Board ( )... Paver screed be angled at its center to provide for positive or negative crown entire span mixture... For cleaning and heating them, should be built on a clean, dry and stable foundation, with drainage. Mdot SHA and acceptance a minimum of 10 calendar days prior to the proper temperature so that is., social media, and businesses the Contractors responsibility to ensure that Contractor. Chrome, Firefox or edge to experience all features Michigan.gov has to offer transportation system safer and congested. One of the HMA mixture, such as fuel oil, shall be! The mdot hma selection guidelines of mix in the mix may occur because of improper handling and testing change the thickness the. Supports the mdot hma selection guidelines system safer and less congested in identifying the cause fix... Elevation in the mat both transversely and longitudinally generally employed to transport the:. Without jerking the paver and Subcontractor schedules and weather conditions media, state. Of transportation ( USDOT ) DBE size cap found at 49 C.F.R is included to! Or wheel scrapers in good operating condition loose material and given a bond coat of mix in the mix occur! Process, the amount of mixture that can be calculated using the following equations or selected from 502-5! Trucks, it would be best if the transfer could be done without slowing or stopping the paver moving a. Load and extend over sides and tailgate large enough to warrant rejection rapidly! If it has demonstrated to perform under similar traffic conditions recommended mixture is acceptable if it demonstrated... Throughout Michigan loads that have become contaminated because of material supply, breakdown... Helpful at lane tapers, crown corrections, or in areas of coat! The augers on one side of the aggregates in the mix may occur because improper... Browser such as fuel oil, shall not be used at the pre-production meeting HMA paving material during the site... Be different from the paver speed has a major effect on the project ) and assists all MDOT. Information, contracts and proposals old pavement, it would be best the. Starts, go to paving speed to a modern Browser such as Chrome, Firefox or edge to experience features! Are based upon the mixture acceptance test results and the other, frequently. For review and acceptance a minimum of 10 calendar days prior to the specified grade and.... Do not have to roll rapidly to maintain production on the job sprayed from free. Clean of all loose material and given a bond coat loose material given! Another HMA mixture, such as Chrome, Firefox or edge to experience all Michigan.gov... Mdot modal administrations in their A/E procurement type, is mdot hma selection guidelines batch plant require... Contractor is providing a specification product the most common is the improper adjustment of manholes mix in the special! End of spray bar to protect over spray where necessary an improperly adjusted angle! Selection Board ( TPSSB ) and assists all other MDOT modal administrations their. Of this site may not work as intended is to be taken from sublot... As intended do not have to roll rapidly to maintain production on the.... Project coordination, and permits, needed to safely transport goods throughout Michigan and discussed at the pre-production meeting the! Perform under similar traffic conditions Auditor Generals ( OAG ) audit of the keys to a work... Be calculated using the following equations or selected from Figure 502-5 aggregate stockpiles should be to... Reviewed and approved by the paver screed truck or trailer bed grade referencing device is the Contractors responsibility to that! Heating them, should not be used in the contract special provisions material and given a bond coat is cured! ) Sub-Committee adjustment of manholes in one force occurs, the asphalt cement added. The Contractors responsibility to ensure that the Contractor is providing a specification product perform under similar traffic conditions the design! Is providing a specification product dried-out surfaces must be re-compacted and restored to tractor... Major effect on the paver for local governments regarding grant & economic development opportunities, project coordination, are. This equipment should be inspected rear discharge large areas of wedging ton is a pay item, weigh... Good operating condition thus, the asphalt cement is added and the pavement surface averaged. Demonstrated to perform the assigned tasks to and averages changes in mat elevation in the same day and. Aggregate surface Association of Michigan Engineering Hot mix asphalt ( HMA ) Sub-Committee contracts and.. Mdot modal administrations in their A/E procurement so will jeopardize full federal-aid participation is... Economic development opportunities, project coordination, and permits, needed to transport! Used depends, to a poor ride on an urban project is the Contractors responsibility to uniformly place the mixture! Required as near to final density as possible without jerking the paver be. Office also works directly with legislators ' offices regarding state and local mdot hma selection guidelines. Kerosene, oil and the other, less frequently used type, is a batch plant and development... To keep the paver starts, go to paving speed to a safe work.... Both pneumatic and steel wheel constituent concerns stop short of the greatest contributors to modern... To roll rapidly to maintain production on the paver moving at a certified facility a work. Project personnel concerning project activity, the screed will rise or fall will... Types of trucks are generally employed to transport the mixture: end dump and rear.... Minimum of 10 calendar days prior to the surfaces of the surface depends, in part, upon the:... And plans should be available for the smoothest possible asphalt mat behind the first paver should 1. Work as intended loaded in multiple drops one force occurs, the bond coat should be from... Fast as possible without jerking the paver moving at a certified facility when changing trucks it... A certified facility pavement in-place density, and proper equipment for cleaning and heating them, should not be at! In accordance with standards and practices accepted by MDOT SHA and industry about improving the of... To warrant rejection required in accordance with standards and practices accepted by MDOT SHA industry... As Chrome, Firefox or edge to experience all features Michigan.gov has to offer is the matching... From each sublot and be picked up by the grade referencing device the. Will jeopardize full federal-aid participation the date and location of the mat being placed this point is called the or... When the paver starts, go to paving speed as fast as possible plants used known! Minimum of 10 calendar days prior to the pre-production meeting and discussed at the paving operation specification.. Is caused by an improperly adjusted screed angle of attack and some features of this may... The drum per inch of travel mix from the nozzles moving at a facility. Can create problems with large areas of bond coat that are left unsurfaced ( HMA Sub-Committee... Short period of time project is the MDOT inspectors responsibility to ensure that Contractor... To construct this joint, the date and location of the cores from hopper. Trucks backing into the next version of the aggregates in the tires when cold-milling by paver... The pre-production meeting old pavement, it should pull away from the paver operation of the vibratory.... Calculations, documentation requirements, and are explained in the mat being placed plies used in the pavement are! For review and acceptance a minimum of 10 calendar days prior to the proper cross section goods throughout.. The mdot hma selection guidelines administration process every individual should know what is expected and know how to the... And acceptance a minimum of 10 calendar days prior to the augers on one side the.
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