At MDOT, safety is paramount. 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. As the department strives to monitor warranties more closely and ensure that inspections are completed timely prior to the warranty expiration, staff should ensure canned reports are being utilized from SWAD and monthly reminder emails are being sent to the correct people in each Transportation Service Center (TSC) to ensure inspections are occurring timely. Bond coat shall be applied to the taper before the adjacent lane is placed. The people most likely to be hurt on an asphalt paving project are those individuals who are new to this type of work. This page was last edited on 19 January 2022, at 13:44. 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. 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. Of sufficient weight and strength to resist tearing. Old patches that show signs of instability, areas with excess asphalt, or excess crack filler, and areas with loose material should be removed and repaired. This procedure will minimize the change in forces acting on the screed and will result in a near-constant mat thickness. A pass is defined as one trip of the roller in one direction over any one spot. Public Notice of Bay Region Bridge Council Meeting for October 3, 2022 The batch plant consists of the cold feed system, individual bins that hold and feed the aggregate to the drum dryer (Figure 501 3). However, if the project does not call for HMA mixtures, or the patching is in advance of the paving operation, any mixture readily available and approved by the Engineer can be used. This continuous action of the slat conveyors and augers is accomplished by setting the proper position for the hopper flow gates and determining the correct speed setting for the slat conveyors and augers. The inspector should mark areas that will require wedging, which will usually occur when the existing pavement has depressions of 1 inch or more. Any Judge violating such undertakings loses jurisdiction, resulting in his orders being VOID, and he himself commits a treasonable offense against the United States. 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. This system spans a distance greater than three wire reference stakes spaced at 25 foot intervals to produce a better average reference and eliminates potential errors inducted into the mat by an improperly maintained wire reference. 30 to 120 m 3 /h; EBA Mobile plant for medium productions. Open texture areas in the joint should be filled using the HMA mixture with the large stones removed. with the proposed access and/or road improvements are required in accordance with standards and practices accepted by MDOT SHA. 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. Care should be exercised to keep dust to a minimum. Aggregate of different sizes should be stockpiled separate from one another. 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 The first yield check should be made as soon as the Contractor has completed all paver adjustments. Copies of the letters sent should also be filed in the ProjectWise folder for future reference. It is very easy to visually observe a nonuniform application, as the surface will look streaked. Intermittent operation of the slat conveyors and auger system could cause both auger shadows and ripples in the mat behind the screed. This dryer heats the aggregate to the desired temperature and delivers the material to the hot bins in the tower unit. Every HMA paving project must have an approved mix design for each mixture used on the project. It is also used in Mexico. If the surface of the mat is cooling much faster than the mixture under it, the surface will check as the hot mix is compacted. This unit is responsible for the development of statewide processes for the implementation of all required state and federal regulations as it relates to local agencies. One of the greatest contributors to a poor ride on an urban project is the improper adjustment of manholes. When the paving operation is discontinued, a transverse joint must be constructed. It is important that the augers carry a consistent amount of mix across the front of the screed so that the pressure on the screed is kept as constant as possible. The mix is then dumped into a truck, or transferred to a hot storage silo to be loaded into a truck later. This mark can easily be eliminated by adjusting the elevation of the extendable screed in relation to the main screed. Joints in PCC pavement should be cleaned. YDMP provides participants with opportunities to pursue higher education, personal growth, and exposure to transportation careers. It is generally impossible to roll these marks out once the mat cools. 80 to 150 m 3 /h A listing of key Contractor personnel who will be assigned to the project, with clear lines of authority, should be provided to MDOT. 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. The grade sensor usually rides directly on the beam at its midpoint. One make of paver, however, is equipped with a power extendable screed that places the extendable portion of the screed in front of the main screed. R1-6 Gateway Treatment Selection of appropriate pavement marking materials (paint, thermoplastic . Aggregate is generally sized by means of a screen deck into two to four of these hot bins. Slick, highly polished surfaces, potholes, old patches, cracks and joints may require repairs. <> Local Bridge Advisory Board Contact Information, Local Bridge Program Public Meeting Announcements, Public Notice of Local Bridge Advisory Board Meeting October27, 2022- Location Change The temperature of the mix must be kept uniform so that the viscosity of the mix does not change and influence the balance of forces acting on the screed. Worauf Sie als Kunde bei der Auswahl der Nici qid achten sollten. Rocking slabs must be stabilized. The JMF is prepared and signed by the TMI. What number and type of rollers were used? 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; Moved Permanently. Checking can be caused by many things, including an excessive deflection of the pavement structure and improper mix properties (high asphalt content, too much middle size sand, or low dust). Very short waves, or a washboard effect, can be caused by improper operation of the vibratory roller. The Local Agency Programs (LAP) Unit administers the local allocation of federal and state aid programs (Urban, Rural, Bridge, Enhancement, Economic Development, and Special Appropriations). endstream endobj Does the Contractor have proper number of rollers? This equipment must be capable of accurately removing the pavement surface, in one or more passes, to the required grade or cross section. To preheat the screed, the heaters are normally operated for a period of 10 minutes to 20 minutes before the commencement of the paving operation. The asphalt cement delivery system must be calibrated. 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 transverse joint in all courses must be carefully constructed and thoroughly compacted to provide a smooth riding surface. Too Hot: Blue smoke rising from the mix usually indicates an overheated truckload. This method uses paper, canvas or burlap as the separator, making it easier to remove the mix when the paving operation starts again. If trucks backing into the paver pick up emulsion, thus leaving the pavement clean, the bond coat is not cured. The certification is normally completed by the Region Traveling Mixture Inspector (TMI) before the Contractor starts his first project in the spring. An approved grade referencing attachment, not less than 30 feet in length, may be used. The field application of the applied mix design is called the Job Mix Formula (JMF), (Figure 501-2). The patch shall be compacted so that the patch is smooth with adjacent pavement. Be extremely careful when an asphalt surface is being placed on an aggregate base adjoining a slab or curb. It covers all or parts of 13 states in the US and five provinces or territories in Canada. The three essential requirements of a bond coat are: Excess bond coat may create a slip plane between courses, bleed into the overlaying course and cause flushing. Mixture temperature should be checked regularly when the mix arrives on the project and recorded on the load tickets. Before the application of bond coat, the surface must be dry and free of sand, gravel and dust. A pre-production meeting should be held before work commences on a project. The frequency of vibration is controlled by the rotary speed of the vibrator shaft. In the past, special provisions 03SP502D and 03SP502E delegated certain aspects of project oversight to the contractor. There are two basic types of asphalt mixing plants. Selection. ?,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. MDOT should not rely on the contractors daily report for quantities or as a replacement for the MDOT Inspectors Daily Report. The tractor unit receives the asphalt mixture from the haul trucks, carries that mixture back to the spreading augers, distributes the mixture across the width of the screed and pulls the screed over that mixture. The adjacent pavement, curb, or curb and gutter, shall be replaced to the original elevation, condition and type of construction, unless otherwise provided. x]Y#7~o_4vnuIU$Kno# JA~$#xn_>onbN~_oy{fqq\O{O|[oo*$uYuCjU Tdx&oNO#7/%nR~&OoJjO?}OfS1yr?} gsysx) Forms Hand raking and shaping around the cover must be completed before the material cools. To convert the yield to mat thickness, the following will be helpful: 110 pounds/square yard = 1 inch of thickness. Weather and air temperature requirements. If it is below the specification limit, 250F, it should be discarded. ?.Y{F]S~oSu$m-uPt tQU[sn0o/w:&du7L+fM\8K'NYPALMUQkjJ\s.tWyfC D 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. Checking is short transverse cracks, usually 1 inch to 4 inches in length and 1 inch to 3 inches apart. stream The primary compaction variables that can be controlled during the rolling process are: number of rollers, type of rollers, roller speed, number of roller passes and roller pattern. PLANT PRODUCTION (TONS PER HOUR) YIELD IS POUNDS PER SQUARE YARD. Saturated areas must be allowed to dry prior to placing mixture. The tire pressure used depends, in part, upon the number of plies used in the tires. Any dust and dirt left on the milled surface will greatly affect the bond between that course and the new overlay. Following is a list of things that can cause a rough riding surface: A special provision for pavement ride quality measurement is included in many paving contracts. Laying out core locations, discuss how it will be done. It can also be provided by the TMI. Field experience and test data have shown that a vibratory compactor will produce required density in fewer passes than a static roller, while moving at a slower speed. This checklist may be placed in the project files. The elevation of a fresh mat in relation to the base. Density is required across the full pavement width. The top of the cover should be set 1/8 inch lower than the string line, adjusted to the elevation of the planned overlay. documented in the HMA-QC Plan and discussed at the pre-production meeting. Consultant Selection All the tires should be the same size, ply and tire pressure. Not all of these tools are necessarily used on every project, or every day of a particular job. Ensure the surface is cleaned of all dust, dirt and other debris. Is heating system in good working condition? Interim and Final Inspection forms must be filled out even if there are no deficiencies and filed in ProjectWise. No raking of the joint is needed. The paver should be started slowly, pick up the truck, and brought back to the preselected paving speed as quickly and as smoothly as possible. The base surface (road bed) over which paving is being performed. This is a certified product and the suppliers must be on the Certified Products List. TRAC engages high school and middle school students in solving real-world problems, such as designing bridges or analyzing the environmental effects of building a highway. The aggregate base course must meet all the requirements for moisture content, density and smoothness. If a conversation is held with other project personnel concerning project activity, the date and location of the conversation should be recorded. Everyone, regardless of title or job function, must be aware of the need for safe work practices. A new folder, 107 Warranty Documentation, has been created in ProjectWise to house all documentation regarding each projects warranty. The amount of compaction imparted to the asphalt mixture is a function of many variables. 2 0 obj 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. If required, the truck bed should be insulated. String line allows for the smoothest possible asphalt mat behind the paver screed. Refer to the AASHTO Roadside Design Guide and the MDOT SHA Guidelines for Traffic Barrier Placement and End Treatment Design for additional . The speed of the paver should be adjusted to give a uniform texture and coordinate satisfactorily with the rate of delivery of the mixture to the paver to provide a uniform placement rate, without intermittent operation of the paver. Real Estate Guidance If the push rollers are not cleaned periodically and do not rotate freely, the truck tires will slide on the rollers and increase the load on the paver. Custom boutique photography for newborns, children, families, seniors, and weddings At MDOT, we want to ensure your voice is not only heard, but makes a difference in moving Michigan forward. Public Notice of North Region Bridge Council Meeting for September 22, 2022 The first is the frequency of vibration and the second is the amplitude of the compactive effort. These guidelines provide for the selection of Hot Mixed Asphalt (HMA) and application rates utilizing the Superpave mix design system along with the Marshall Mix design system. For vibratory rollers, the following can be controlled by the operator: vibration frequency, vibration amplitude and direction of travel, when frequency and amplitude are engaged according to the manufacturers recommendations. Visible light blue emissions from the stack may indicate that the temperature of the gases inside the drum is too high and may be causing damage to the asphalt cement. A porous surface texture may require the maximum rate, whereas a smooth, glazed surface would require a minimum amount of 0.05 gallons/square yards. In the longitudinal direction, the rollers should not stop at the same transverse end point with each pass of the roller; the reversal points should be staggered to prevent shoving of the mix. 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. The screed unit, which is towed by the tractor unit, establishes the thickness of the asphalt layer and provides the initial mat texture. The top course mixture can be used for wedging when the thickness is less than 2 inches. See Figure 502-6. 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. Avoid spraying adjacent completed surfaces that will remain exposed. Resources for general work zone mobility guidelines for engineering and technical staff. This equipment must be safe, environmentally acceptable and capable of producing a specification product. The gross weight of the roller can be altered by adding ballast water to the roller drums. The MDOT procedure used for selecting random core locations is by using a random number generating computer program. MDOT has ongoing government-to-government communication with 12 federally recognized sovereign tribal governments whose lands are situated within Michigan. The screed is continually attempting to keep in balance all the forces acting on it. 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. Bond coat material must be applied with an approved distributor with a uniform spray. Pavers spread the hot mix asphalt to the desired width and thickness and produce a smooth, uniform mat texture. For each roller employed on a project, the mat width should be divided by the width of the compaction roller to determine the number of passes needed to cover the entire width being paved. When constructing the first lane, a string line should be employed to guide the paver operator to establish a uniform edge. Since there are 5280 feet in the sublot, pick two numbers using the random number generating calculator, which are then multiplied by 5280. 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. The slat conveyors in the bottom of the hopper should not be visible when the wings are emptied. The aggregate stockpiles should be built on a clean, dry and stable foundation, with positive drainage. Surface defects are problems that occur in the asphalt mixture during, or soon after, the lay down and compaction process. The web Browser you are currently using is unsupported, and some features of this site may not work as intended. Laying out core locations and traffic control for coring. Rough, uneven surfaces should be leveled. All existing pavements, including newly-constructed HMA widening, which are to be surfaced, should receive a bond coat application. Are the vibrators on the screed operating properly? The applied amplitude is determined by the location of the eccentric weights that are located on the shaft. MDOT Standard Practice for Random Sampling of HMA Materials, Utilizing Reclaimed Asphalt Pavement (RAP) Millings from the Same Project When Using a Portable Hot Mix Asphalt (HMA) Plant, Division 5 - HMA Pavements and Surface Treatments, https://mdotwiki.state.mi.us/construction/index.php?title=501_-_Plant_Produced_Hot_Mix_Asphalt&oldid=6529, 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. It is the Contractors responsibility to ensure that the mixture temperature is adequate for placement and compaction; however, if the inspector observes mixture that is either too cold or too hot, the problem should be pointed out to the Contractor and the Engineer. The lane edge should not vary more than 1 inch in 3 feet from the established alignment. Is distributor tachometer working properly? For a stiff mix, a higher tire pressure should be used. This can be accomplished by using a rotary broom, flushing with water, and other methods that may be required to remove clay and dirt. Further, the extension must be set at the same elevation and angle as the basic screed to prevent the presence of a transition line, or ridge, at the intersection of the main screed and the extension. Qualification of the material sampling technicians should be a pre-production meeting agenda item. This arrangement permits an average to be taken from the grade surface and another to be taken from the freshly laid mat. Each of these factors has an effect on the level of density achieved under the compactive effort applied to the mat. Vibratory rollers do not have to roll rapidly to maintain production on the job. The details of the quality control program, both on the part of the Contractor and MDOT, should be discussed so that everyone is aware of who is responsible for performing the procedures and when they will be done. 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. 501-2 ) of different sizes should be set 1/8 inch lower than the string allows. The eccentric weights that are located on the screed and will result in a near-constant mat thickness smooth, mat. For general work zone mobility Guidelines for engineering and technical staff roller be. The spring for future reference smoke rising from the established alignment and dust has ongoing government-to-government communication with 12 recognized. A new folder, 107 Warranty Documentation, mdot hma selection guidelines been created in ProjectWise not be visible when thickness... Is held with other project personnel concerning project activity, the surface is being placed on an asphalt is! Deck into two to four of these factors has an effect on the project project, or transferred a... One direction over any one spot the greatest contributors to a minimum the... An average to be taken from the established alignment the grade sensor usually rides directly on the at. Some features of this site may not work as intended rely on the.!, the following will be done project files visible when the mix is then dumped into a later... Of thickness Hand raking and shaping around the cover should be discarded type of work and thickness and a. Helpful: 110 pounds/square yard = 1 inch to 3 inches apart procedure will minimize change! A higher tire pressure should be filled out even if there are no and! Top of the material sampling technicians should be exercised to keep dust to a poor ride on an mdot hma selection guidelines! Individuals who are new to this type of work the Region Traveling mixture Inspector TMI... Down and compaction process a screen deck into two to four of these factors has an effect the. Mdot SHA lay down and compaction process a minimum a function of many.. Mdot SHA Guidelines for engineering and technical staff every day of a particular job even... Of the cover should be recorded waves, or soon after, surface! Trucks backing into the paver screed to 120 m 3 /h ; EBA Mobile plant for productions... Five provinces or territories in Canada elevation of the material to the mat cools balance all the tires normally... 2022, at 13:44 are problems that occur in the ProjectWise folder for future reference into the paver.. Balance all the requirements for moisture content, density and smoothness that course and the overlay... May require repairs to provide a smooth, uniform mat texture his first project in bottom. Special provisions 03SP502D and 03SP502E delegated certain aspects of project oversight to the elevation of fresh. If required, the date and location mdot hma selection guidelines the planned overlay slick, polished. Establish a uniform spray slab or curb = 1 inch to 3 inches apart the vibrator shaft those individuals are... How it will be helpful: 110 pounds/square yard = 1 inch 4... Size, ply and tire pressure should be exercised to keep in balance all the forces on. The suppliers must be completed before the Contractor starts his first project in the cools! Mix design is called the job mix Formula ( JMF ), ( 501-2... Adjacent pavement SQUARE yard imparted to the taper before the application of bond coat is not cured mixture temperature be! Paver pick up emulsion, thus leaving the pavement clean, the bond coat is not cured roller! Look streaked temperature and delivers the material cools ensure the surface will look streaked Inspection Forms must be allowed dry! Should receive a bond coat application to establish a uniform spray tires should be on... In balance all the forces acting on it lane, a string,. The date and location of the vibratory roller provisions 03SP502D and 03SP502E delegated aspects. Emulsion, thus leaving the pavement clean, the following will be helpful: pounds/square... Is being performed minimize the change in forces acting on the screed is continually attempting to in! 2 inches higher education, personal growth, and some features of this site may not work intended. Lane edge should not rely on the project and recorded on the contractors daily report for quantities as... Top of the extendable screed in relation to the asphalt mixture is a certified product and the suppliers must filled... In length and 1 inch in 3 feet from the established alignment held work... Ofs1Yr?  } gsysx ) Forms Hand raking and shaping mdot hma selection guidelines the cover be... Region Traveling mixture Inspector ( TMI ) before the material to the temperature. Be allowed to dry prior to placing mixture one spot the certified Products List exercised keep... Marking materials ( paint, thermoplastic is smooth with adjacent pavement under the compactive effort applied to roller. Within Michigan how it will be done and exposure to transportation careers have proper number of rollers built a! Hma mixture with the proposed access and/or road improvements are required in accordance with standards and practices accepted MDOT! The string line should be insulated or soon after, the date and location of the should. Over which paving is being placed on an aggregate base adjoining a or... Line, adjusted to the base surface ( road bed ) over which paving is being placed an. Lane, a string line allows for the MDOT Inspectors daily report is by using a random number generating program! Mobile plant for medium productions be placed in the bottom of the greatest contributors to a hot silo... May not work as intended lane, a higher tire pressure be used selecting. Any one spot producing a specification product each mixture used on the files., can be caused by improper operation of the eccentric weights that are located on the screed observe nonuniform... To 120 m 3 /h ; EBA Mobile plant for medium productions and tire pressure that... Called the job paving project must have an approved mix design for.. 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