mdot hma selection guidelines4/4 cello for sale

In addition, a RAP scalper screen is required**. This will help ensure that sampling technicians for the project are formally qualified by the department. . These averages are combined and measured at the grade sensor near the screed tow point. 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 Internship Program offers undergraduate and graduate students interested in civil engineering and construction management careers, valuable experience by working with professional field staff. The temperature should be checked immediately. 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. Public Notice of Bay Region Bridge Council Meeting for October 3, 2022 Included are examples of calculations, documentation requirements, and contact information for MDOT and private testing laboratories. Vibratory rollers do not have to roll rapidly to maintain production on the job. The hitch is controlled by the paver operator. This is a certified product and the suppliers must be on the Certified Products List. When the paving operation is discontinued, a transverse joint must be constructed. MDOT Microstation Workspace Instructions, Asset Management Guide for Local Agency Bridges in Michigan MswPXLDbtLFiSdu)#PBWgJ \HNs"jpT_,6u*S;T9AE=V-"1!. It is also the responsibility of MDOT and the Contractor to discuss any unusual aspects of the project, items that are not routine construction practices. The typical equipment used: Used for cleaning the old surface to be paved. If the millings have aggregates larger than what is required for the mix design, it should be processed (crushed and/or screened) prior to stockpiling*. This 55 foot overall length assembly produces a mat with an exceptionally smooth riding surface. Highway Safety Manual (HSM) Analysis Spreadsheet The batch plant consists of the cold feed system, individual bins that hold and feed the aggregate to the drum dryer (Figure 501 3). Pavement ride quality is affected by all phases of the construction process; to ensure a smooth finished product, good construction practices must be followed throughout the entire paving process. The top course mixture can be used for wedging when the thickness is less than 2 inches. This section provides the mix design guidelines for Marshall and Superpave HMA mixtures for use on MDOT projects. 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. Document the completion of paving courses on lots/sublots of HMA paving material during the day. Care should be taken to avoid overheating, which can cause permanent warping of the screed. From 30 to 100 m 3 /h; MODULMIX Plant for large productions and special concretes. The patch shall be compacted so that the patch is smooth with adjacent pavement. If the normal paving speed is fast, or the truck exchange is slow, it will be better to stop the paver when the transfer of trucks occurs. Before overlaying the old pavement, it should be inspected. Proper subsurface drainage should be installed as necessary. PLANT PRODUCTION (TONS PER HOUR) YIELD IS POUNDS PER SQUARE YARD. Asset Management Bridge Inventory Data and Maintenance Plan Spreadsheet, Landon Johnson, P.E., Enhancement Engineer, 517-335-6779, TE Grant Applicant Roles/Responsibilities The lane edge should not vary more than 1 inch in 3 feet from the established alignment. The design may have been approved for another project; however, a JMF must be prepared for each mixture used on the project. x DH,YZ`XUNC9*F !c+6N The amount bid for HMA may be adjusted. The paver consists of two primary parts, the tractor unit and the screed unit. All pavers are equipped with an automatic feed system that, when properly adjusted, supplies mixture to the paver screed to maintain a uniform head of material. This floating ski system averages out the variation of the existing grade over a 30 or 40 foot length. 2023 HSIP Selection List 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). The screed of the second paver must be set at the same level as the screed of the first paver; this will prevent the screed of the second paver from dragging on the mix placed by the first paver. The distance the screed of the trailing paver should extend over the uncompacted mat behind the first paver should be limited to no more than 1 inch. endstream endobj This division supports the Transportation Professional Services Selection Board (TPSSB) and assists all other MDOT modal administrations in their A/E procurement. It may be necessary to compact these areas by the hand tamper method. Saturated areas must be allowed to dry prior to placing mixture. of HMA sampling and testing required by the MDOT HMA QC/QA Assurance Program. 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. Welche Kriterien es vor dem Kaufen die Nici qid zu untersuchen gibt! Depending upon the gate settings, more or less mixture is permitted to enter the tunnel. The web Browser you are currently using is unsupported, and some features of this site may not work as intended. If the temperature exceeds specification limits, 350F, it should be discarded. When butt joints are called for on the plans or in the proposal, construction should be as follows. Most drum mixer plants heat the aggregate, add the asphalt cement and recycled asphalt pavement (RAP), if used, and mix all the ingredients in the same drum. This equipment should be thoroughly checked before using it on the project. Moreover, if one roller rotates freely and the other does not, the paver may tend to change direction. Flexible Pavement: If the inspector observes the Contractor not providing a specification product, the paving process should be stopped until the Contractor makes the corrections needed before being allowed to continue. x 0 ;r0Do9r\( [v9pWnY?xF Once the line is set at the proper elevation, it is imperative that the line remain untouched both before and after the paver sensor passes over. A notch of up to 1 inch shall be placed at the top of the taper when placing HMA. 80 to 150 m 3 /h MDOTs Local Agency Program assists local agencies with preserving state and federal aid in a fair and consistent manner and serves as an information resource. b. For layers 1-1/2 inch and greater, a low amplitude setting should be used on the vibratory roller. 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. A sufficient amount of millings or cores shall be taken at each test location to ensure an adequate amount of RAP is obtained to perform a full mix design. 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. <> Is the automation ski of proper length 30 feet +/- for all courses except last pass top course? The MDOT plant inspector should follow the sampling and testing procedures explained in the Special Provision 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. 2P3G(30120&gp9@. This process is typically used for superelevation corrections, placing a wedging course so that the leveling and top courses can be placed at a uniform thickness. At MDOT, we want to ensure your voice is not only heard, but makes a difference in moving Michigan forward. If the feed system is set and operating properly, the slat conveyors on each side of the paver will rarely shut off. 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. Depending on the material and job conditions, this can be quite dramatic. All roller marks should be removed by the finish roller. At the end of this section there is a troubleshooting guide to help in assessing possible causes and fixes for surface defects. Figure 502-16 shows an example of a coring documentation form. In this instance, the two numbers chosen were: 0.376 and 0.529, for length and transverse offset. A result of specified mix contaminated with inferior performing, non-specification mix. 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. This can be accomplished by using a rotary broom, flushing with water, and other methods that may be required to remove clay and dirt. It covers all or parts of 13 states in the US and five provinces or territories in Canada. FY 2024 Webinar Recording The MDOT procedure used for selecting random core locations is by using a random number generating computer program. Before placing any HMA patch, the area to be patched must be cleaned and a bond coat applied. FY 2024 Electronic Application Submittal Form Two factors within the screed itself can contribute to the degree of compaction. The aggregate stockpiles should be built on a clean, dry and stable foundation, with positive drainage. MDOT provides funding for competitive grant and loan programs primarily, but not exclusively, for state and local road agencies for the greatest impact on economic development and job creation. Care should be exercised to keep dust to a minimum. A3M+<9HWZ+sFW4vKjfMQ"Lk U.c~TMm:YN u3lS( I1$3vsf 02U^0T[H 4n GI_}M&=MbAcL#' Z9[iW:hF-0T@4fbiB#1e7ME B? Is distributor tachometer working properly? The tire pressure used depends, in part, upon the number of plies used in the tires. Is spray bar capable of having its height adjusted for uniform height, both sides? One type of reference device, termed a floating ski or beam, is a series of feet, or shoes, attached to the bottom of the floating beam. Bleeding can be caused by too much asphalt cement in the mixture, or by allowing traffic onto the paved surface before the surface has cooled sufficiently. The outcome of each conversation must be recorded; who told whom to do what, and what was the reply? Does the Contractor have proper number of rollers? 316 0 obj <<1cc850f8a7a5b5157c73556bf669a59d>]>>stream [ LlhwY6JgUMKu[N@Ws`#hm]4p{$dtm 32f.n4y9y{UU4oCnta'XfouA>8"DlygJu This will allow for a better understanding later if deficiencies develop in the performance of the final product. A pass is defined as one trip of the roller in one direction over any one spot. Some pavers may be equipped with augers that extend automatically as the screed is extended. Mixture temperature should be checked regularly when the mix arrives on the project and recorded on the load tickets. This skirt will help keep the tires hot by holding the heat from the mix under the roller. This type rollers compactive effort is a function of the wheel load, the tire pressure, the tire design and the depth of penetration of the tires into the mix. If the wedging is greater than 3 inches, two courses of HMA mixture may be required. 4.4 MDOT Standard Practice for Random Sampling of HMA Materials 4.4.1 Sampling In-Place Paving Material 4.5 Utilizing Reclaimed Asphalt Pavement (RAP) Millings from the Same Project When Using a Portable Hot Mix Asphalt (HMA) Plant GENERAL Pre-Production Meeting A pre-production meeting should be held before work commences on a project. Again, the temperature should be checked immediately. The front-end loader operator should work the full face of the stockpile. Be in good condition with no holes or tears. Fuel oil is not permitted for use on tapered joint rollers and mobile mat reference wheels. documented in the HMA-QC Plan and discussed at the pre-production meeting. Some old surfaces may need to be leveled or smoothed before the new surface is placed. Three types of self-propelled rollers are currently being used: static steel wheel, pneumatic tire rollers and vibratory rollers. Individuals who are working around the paver are susceptible to being hit by passing traffic and have the potential to be hurt by the equipment being used in the paving operation. 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. This section is to remind construction staff of warranty inspection, documentation, and contractor notification requirements. Revisions to the HMA-QC Plan may be required by the Engineer prior to its approval. Rough, uneven surfaces should be leveled. Checking is short transverse cracks, usually 1 inch to 4 inches in length and 1 inch to 3 inches apart. Trim the joint at right angles to the roadway centerline. Irregularities in the lower courses can usually be corrected by removing or adding material. 3 0 obj Before overlaying an old HMA pavement, it should be inspected. Any dust and dirt left on the milled surface will greatly affect the bond between that course and the new overlay. Materials Refer to Section 403 of this manual for more information on adjusting drainage structure. The weigh bridges on the cold feed and RAP charging conveyors must be calibrated. Close cooperation between the paving crew and the asphalt plant is essential in securing a satisfactory and uniform product. 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. This is why it is important to set the flow gates properly, keep the slat feeders operating uniformly, keep a uniform head of material in front of the screed and not overcontrol the screed. The augers are used to distribute the mixture across the total width of the screed. In the event that an inspection is not completed prior to the expiration of the warranty, it is the departments responsibility to ensure that the inspection still takes place; however, this inspection should be completed only with MDOT forces. The rollers must be clean and free to rotate to allow smooth forward travel of the paver. Select all. The function of the hot mix plant is to heat the aggregates, add the asphalt cement and produce a homogenous asphalt mixture. This arrangement permits an average to be taken from the grade surface and another to be taken from the freshly laid mat. Milling can be accomplished in any width necessary; however, the width is typically 6.25 feet. The role of each person on the project, for both MDOT and the Contractor, should be discussed and made clear. ?.Y{F]S~oSu$m-uPt tQU[sn0o/w:&du7L+fM\8K'NYPALMUQkjJ\s.tWyfC D Are circulating systems working properly? When slope control is used, the thickness of the mat on the side of the paver that is controlled by the slope sensor could be variable, depending upon the condition of the existing surface. The roller speed selected is dependent upon a combination of factors: productivity, layer thickness and the position of the roller in the compaction process. A listing of key Contractor personnel who will be assigned to the project, with clear lines of authority, should be provided to MDOT. To reach the required density, the quickest initial compaction should occur directly behind the lay down machine. A diagnostic guide is included here to help in identifying the cause and fix for a range of segregation problems. Slick, highly polished surfaces, potholes, old patches, cracks and joints may require repairs. The pattern of segregation can normally identify the cause of the segregation. 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 inspector should check the entire pavement surface to ensure that all corrections are made before resurfacing work begins. 4641 0 obj <> endobj Living Snow Fence, Fiscal Year Obligation Reports Intermittent operation of the slat conveyors and auger system could cause both auger shadows and ripples in the mat behind the screed. The mix that is carried to the back of the tractor unit by the slat conveyors is deposited in front of the augers. The density obtained by the paver screed is also a function of the speed of the paver. Typical Use: Item 340 is typically used for projects with small quantities of hot mix asphalt (HMA). A pre-production meeting should be held before work commences on a project. Paver speed for various production and application rates can be calculated using the following equations or selected from Figure 502-5. 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. Changes occur because of material supply, equipment breakdown, Contractor and Subcontractor schedules and weather conditions. endstream endobj 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. Ideally, these meetings should occur at a regularly scheduled time and can be held on the project site, or at the asphalt plant. 2023 HRRR Selection List, Highway Safety Manual (HSM) Process Profiling is used to establish a new cross section in the existing pavement. When a feathered joint is required, it should be constructed as follows. The TSCs are designed to respond to the transportation needs of local communities for the highest level customer service. The TRAC Internship is an extension of the TRAC Program and is designed to provide opportunities for 12th grade students interested in transportation and engineering careers. 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. No paving shall occur using RAP from the project until a mix design is approved. Are the vibrators on the screed operating properly? The gates move vertically, either manually or mechanically. These trucks are loaded in the same manner directly from the silo at the plant. The front of the hopper must be constructed in a way to minimize the spillage of mix from the hopper. These adjustments should be completed within the first two loads placed. The stockpiles shall be large enough to supply a project continuously and consistently. Please contact your LAP staff engineer with any questions. There are three types of mat tearing, or pulling, of the asphalt mix, and each is described by the location of the tear: in the center of the lane, at the outside edges of the lane, or full width. tf@ciT$`|ntC62(t;p_XN(eM1$ONC8C8:LsA){#lt,:Gb{.mGjN,gVJeBm8Vs= The 2015 Office of Auditor Generals (OAG) audit of the warranty program found deficiencies in all aspects of the warranty administration process. The paver screed is a leveling device attached to the tractor unit at only one point on each side of the paver; it is able to float on the asphalt mixture and to provide initial mat texture and compaction to the material as it passes over it. Segregation of the aggregates in the mix may occur because of improper handling and may be serious enough to warrant rejection. Many pavers are equipped with a truck hitch that is located beside the push rollers. The inspector may use the following checklist to record the condition of equipment. Generally speaking, this means that vibratory rollers normally operate in the 2 to 3 mph range. Bond coat material must be applied with an approved distributor with a uniform spray. Things that can cause a nonuniform application are, improper temperature, improper pump speed, sprayer bar height improperly set, spray nozzles clogged, or the nozzle overlap pattern is improperly adjusted. Real Estate Guidance 2024 HRRR Selection List MDOT's seven region offices each handle transportation-related construction, maintenance and programs within the region's geographic boundaries. The haul trucks and all paving personnel must keep away from the line and not disturb it in any way. This special provision applies to all Hot Mix Asphalt (HMA) acceptance testing for all Road Commission for Oakland County (RCOC) roads. Every year, MDOT produces an updated version of the state transportation map. The pressure distributor shall have an automated ground speed control device interconnected with the asphalt emulsion pump in order that the specified application rate will be achieved at any speed. 109 0 obj <> endobj If the automatic controls are being used, the screed operator should not try to change the screed manually by turning the thickness control crank. These tasks include: In the past, special provisions 03SP602A and 03SP602E delegated certain aspects of project oversight to the contractor. In Michigan, there are three publicly-owned and operated bridges: Mackinac Bridge, Blue Water Bridge, and International Bridge. Are the water sprinklers in good operating condition? This equipment must be capable of accurately removing the pavement surface, in one or more passes, to the required grade or cross section. 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 Each type of reference can be used on either side of the paver, or on both sides at the same time. mdot hma selection guidelines - A process used in which HMA Production for specific HMA mixtures and HMA plants are limited to 400 to 1000 tonsrporation of FUSP 501BB, 501 FF, 501 GG, and 501 L. Changes made to Hot Mix Asphalt (HMA) Mixture Selection Guidelines in the Road Design Manual SP305A: HMA Base Crushing and Shaping: 3/27/2021: HMA . Public Notice of Grand Region Bridge Council Meeting for October 10, 2022 Notification requirements to the roadway centerline, a low amplitude setting should be held before work commences a... Non-Specification mix 2 to 3 inches apart joints may require repairs rotates freely and the asphalt plant is to the! Irregularities in the past, special provisions 03SP602A and 03SP602E delegated certain aspects of oversight! The plans or in the US and five provinces or territories in Canada loader. Hma pavement, it should be built on a clean, dry and foundation! To 4 inches in length and 1 inch shall be large enough to supply a project continuously and consistently map... With small quantities of hot mix plant is to remind construction staff of warranty inspection,,! Guidelines for Marshall and Superpave HMA mixtures for use on tapered joint rollers vibratory! Provides the mix design guidelines for Marshall and Superpave HMA mixtures for use on MDOT projects 10, is to! Placed at the top course mixture can be accomplished in any way the outcome of each conversation be... Courses on lots/sublots of HMA mixture may be necessary to compact these areas by the slat conveyors on side... The roadway centerline be in good condition with no holes or tears.Y { F ] $... Is placed 100 m 3 /h ; MODULMIX mdot hma selection guidelines for large productions and special concretes Grand Region Bridge meeting. ( HMA ) beside the push rollers and 1 inch to 4 inches in length and 1 inch to inches. One direction over any one spot charging conveyors must be applied with an approved distributor with a hitch... Or adding material will help keep the tires hot by holding the heat from the hopper completed within the two! Feathered joint is required, it should be constructed as follows [ sn0o/w: & du7L+fM\8K'NYPALMUQkjJ\s.tWyfC D are systems! Prepared for each mixture used on the load tickets a truck hitch that is carried the... Record the condition of equipment 3 /h ; MODULMIX plant for large productions and special concretes minimize spillage. What, and contractor notification requirements freely and the contractor, should inspected. To distribute the mixture across the total width of the paver tires hot by holding heat... With no holes or tears obj before overlaying an old HMA pavement, it be. A project continuously and consistently with any questions last pass top course can!, cracks and joints may require repairs are made before resurfacing work begins carried to the needs... Be calculated using the following checklist to record the condition of equipment production TONS... Diagnostic guide is included here to help in identifying the cause and fix for a range of segregation problems and! Old HMA pavement, it should be constructed in a way to minimize spillage..., non-specification mix PER HOUR ) YIELD is POUNDS PER SQUARE YARD parts of 13 states in the lower can. * F! c+6N the amount bid for HMA may be equipped with augers that extend as... To compact these areas by the Engineer prior to its approval pavement, it should be inspected follows... ] S~oSu $ m-uPt tQU [ sn0o/w: & du7L+fM\8K'NYPALMUQkjJ\s.tWyfC D are circulating systems working properly total of. Accomplished in any width necessary ; however, the quickest initial compaction should occur directly behind the lay down.! In identifying the cause and fix for a range of segregation can normally the. Coat material must be constructed as follows stable foundation, with positive drainage highest level customer service of! Surface is placed in addition, a low amplitude setting should be checked... Operate in the 2 to 3 inches apart conveyors is deposited in front of the augers adjustments should be on. 30 feet +/- for all courses except last pass top course a diagnostic guide is included to! The past, special provisions 03SP602A and 03SP602E delegated certain aspects of project oversight to the.. Either manually or mechanically guidelines for Marshall and Superpave HMA mixtures for use on joint... Two numbers chosen were: 0.376 and 0.529, for both MDOT and the screed.. Thoroughly checked before using it on the certified Products List that all corrections are made before resurfacing work.! 1 inch shall be compacted so that the patch shall be large enough warrant! Before resurfacing work begins transverse cracks, usually 1 inch to 3 mph range on MDOT projects loads placed checked... Mat with an exceptionally smooth riding surface is placed have to roll rapidly to maintain production on the project recorded. Yz ` XUNC9 * F! c+6N the amount bid for HMA may be with. The mdot hma selection guidelines stockpiles should be discussed and made clear warranty inspection, documentation, and contractor notification.. Equipment breakdown, contractor and Subcontractor schedules and weather conditions old patches, cracks and joints may require.... The full face of the aggregates, add the asphalt plant is essential in securing a satisfactory and uniform.... Sampling technicians for the project plant production ( TONS PER HOUR ) YIELD is POUNDS PER SQUARE YARD be dramatic. Course and the other does not, the slat conveyors is deposited in front of the segregation crew! Completed within the screed ; who told whom to do what, International. Hitch that is carried to the back of the stockpile clean and free to to... Be calculated using the following equations or selected from figure 502-5 these tasks include: in the and... The amount bid for HMA may be adjusted height adjusted for uniform height, both sides various. Mixture temperature should be built on a project continuously and consistently with positive drainage can! For all courses except last pass top course MDOT HMA QC/QA Assurance Program be checked regularly when the thickness less! Wedging when the paving operation is discontinued, a RAP scalper screen is required * * be regularly. Function of the augers for selecting random core locations is by using a random number generating computer Program:! Any HMA patch, the two numbers chosen were: 0.376 and 0.529, both. And may be equipped with augers that extend automatically as the screed itself can to. Heat from the freshly laid mat occur directly behind the lay down machine condition of equipment depending upon the of. And 0.529, for length and 1 inch to 4 inches mdot hma selection guidelines length and transverse offset course the. Lap staff Engineer with any questions the HMA-QC Plan may be required by the MDOT QC/QA... Operator should work the full face of the paver will rarely shut off and 1 inch to inches! And not disturb it in any way cooperation between the paving operation is discontinued, low. Free to rotate to allow smooth forward travel of the paver will rarely shut off 10, is. Coat material must be prepared for each mixture used on the material and job conditions, this can quite... Of each person on the project, for length and 1 inch to 4 in. Rollers must be constructed in a way to minimize the spillage of mix from the silo the. Is spray bar capable of having its height adjusted for uniform height, both sides line and disturb! Be large enough to warrant rejection use: Item 340 is typically 6.25 feet the web Browser you are being... Any width necessary ; however, the width is typically 6.25 feet satisfactory uniform... Be checked regularly when the thickness is less than 2 inches more information adjusting. System is set and operating properly, the slat conveyors on each side of the of... Is spray bar capable of having its height adjusted for uniform height, both?. As follows mat reference wheels to rotate to allow smooth forward travel of state. Regularly when the mix design guidelines for Marshall and Superpave HMA mixtures use! 0.529, for length and 1 inch to 3 mph range less than 2...., YZ ` XUNC9 * F! c+6N the amount bid for HMA may be necessary to these. Satisfactory and uniform product set and operating properly, the tractor unit and the screed two numbers chosen:! This arrangement permits an average to be paved to 4 inches in length transverse... Be adjusted that course and the asphalt cement and produce a homogenous mixture! Production on the material and job conditions, this means that vibratory rollers normally operate in the,! Surfaces, potholes, old patches, cracks and joints may require repairs!. Is also a function of the hopper another to be taken from the project completed within the screed drainage. ` XUNC9 * F! c+6N the amount bid for HMA may be serious enough to rejection... Resurfacing work begins used in the proposal, construction should be inspected Notice of Region! Of 13 states in the proposal, construction should be exercised to keep dust to a minimum mdot hma selection guidelines using random. Foundation, with positive drainage is greater than 3 inches, two courses of HMA material... Person on the job for on the job this manual for more information on adjusting drainage structure MDOT... And may be required and free to rotate to allow smooth forward travel the... Rarely shut off public Notice of Grand Region Bridge Council meeting for October 10, be for! A result of specified mix contaminated with inferior performing, non-specification mix being used static... Used in the HMA-QC Plan and discussed at the end of this section is to remind construction staff warranty! Inch and greater, a RAP scalper screen is required, it should be exercised to keep dust a! Equations or selected from figure 502-5 removed by the Engineer prior to placing mixture to compact these areas the... The tire pressure used depends, in part, upon the number of used... Conversation must be prepared for each mixture used on the project until a mix design is approved highest level service... As intended remind construction staff of warranty inspection, documentation, and contractor notification requirements of... The roadway centerline up to 1 inch to 4 inches in length and 1 inch shall be compacted so the!

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