3-10 TESTING REQUIREMENTS
307.10 Quality Control The Contractor shall operate in accordan ce with the approved
Quality Control Plan (QCP) to assure a product meeting the cont ract requirements. The QCP shall meet the requirements of Section 106.4 - Quality Cont rol and this Section. The Contractor shall not begin recycling operations until the Depar tment approves the QCP in writing. Prior to performing any recycling process, the Department and t he Contractor shall hold a Pre-recycle conference to discuss the recycling schedule, typ e and amount of equipment to be used, sequence of operations, and traffic control. A copy o f the QC random numbers to be used on the project shall be provided to the Resident. All field supervisors including the responsible onsite recycling process supervisor shall attend th is meeting. The QCP shall address any items that affect the quality of the Recycling Process including, but not limited to, the following:
A.Sources for all materials, including New Aggregate and Addit ional Recycled Material.
B.Make and type of rollers including weight, weight per inch o f steel wheels, and average contact pressure for pneumatic tired rollers.
C.Testing Plan. D. Recycling operations including recycling speed, methods to e nsure that segregation is minimized, grading and compacting operations.
E.Methods for protecting the finished product from damage and procedures for any necessary corrective action.
F.Method of grade checks. G. Examples of Quality Control forms. H. Name, responsibilities, and qualifications of the Responsibl e onsite Recycling Supervisor experienced and knowledgeable with the process.
I.A note that all testing will be done in accordance with AASH TO and MaineDOT/ACM procedures. The Project Superintendent sha ll be named in the QCP, and the r esponsibilities for successful implementation of the QCP shall be outlined. The Contractor shall sample, test, and evaluate the full depth reclamation process in accordance with the following minimum frequencies: MINIMUM QUALITY CONTROL FREQUENCIES Test or Action Frequency Test Method Density 1 per 1000 feet / lane AASHTO T 310 Air Temperature 4 per day at even intervals Surface Temperature At the beginning and end of each days operation Yield of all materials (Daily yield, yield since last test, and total project yield.) 1 per 1000 ft/lane 3-11 The Department may view any QC test and request a QC test at an y time. The Contractor shall submit all QC test reports and summaries in wr iting, signed by the appropriate technician, to the Department’s onsite representati ve by 1:00 P.M. on the next working day, except when otherwis e noted in the QCP due to loca l restrictions. The Contractor shall make all test results, including randomly samp led densities, available to the Department onsite. The Contractor shall cease recycling operations whenever one of the following occurs:
A.The Contractor fails to follow the approved QCP. B. The Contractor fails to achieve 98 percent density after c orrective action has been taken.
C.The finished product is visually defective, as determined by the Resident.
D.The computed yield differs from the mix design by 10 percen t or more. Recycling operations shall not resume until the Department appr oves the corrective action to be taken. 307.101 Test Strip The contractor shall assemble all items of equipment for the recycling operation on the first day of the recycling work. The Contractor shall construct a test strip for the project at a location approved by the Reside nt. The Responsible onsite Recycling Supervisor will work with Department personnel to det ermine the suitability of the mixed material, moisture control within the mixed material, and compaction and surface finish. The test strip section is required to:
A.Demonstrate that the equipment and processes can produce rec ycled layers to meet the requirements specified in these special provisions.
B.Determine the effect on the gr adation of the recycled materi al by varying the forward speed of the recycling machine and the rotation rate of the mil ling drum.
C.Determine the optimum moisture necessary to achieve proper c ompaction of the recycled layer.
D.Determine the sequence and manner of rolling necessary to ob tain the compaction requirements and establish a target density. The Contractor an d the Department will both conduct testing with their respective gauges at this time. The test strip shall be at least 300 feet in length of a full l ane-width (or a half-road width). Full recycling production will not start until a passi ng test strip has been accomplished. If a test strip fails to meet the requirements of this specification, the Contractor will be required to repair or replace the test strip to the satisfaction of the Resident. Any repairs, replacement, or duplication of the test strip will be at the Contractor’s expense. After the test strip has been pulverized, and the roadway broug ht to proper shape, the Contractor shall add water until it is determined that optimum moisture has been obtained. The test strip shall then be rolled using the specified compact ion equipment as directed until the density readings show an increase in dry density of less th an 1 pcf for the final four 3-12 roller passes of each roller. The Contractor and Department wil l each determine a target density using their respective gauges by performing several add itional density tests and averaging them. The average of these tests will be used as the target density of the recycled material for QC and Acceptance purposes. Following completion of the test strip, compaction of the mater ial shall continue until a density of not less than 98 percent of the test strip target de nsity has been achieved for the full width and depth of the layer . During the construction and compaction of the Full Depth Recycled base, should three consecutive Acceptance test results for density fail to meet a minimum of 95 percent of the target density, or exceed 102 perc ent of target density, a new test strip shall be constructed. ACCEPTANCE TEST FREQUENCY Property Frequency Test Method In-place Density 1 per 2000 ft / lane AASHTO T 310 307.102 Curing. No new pavement shall be placed on the full de pth recycled pavement until curing has reduced the moisture content to 1 percent or l ess by total weight of the mixture, or a curing period of 4 days has elapsed, whichever co mes first.
307.11 Method of Measurement Full Depth Recycled Pavement (Unt reated or Treated
with Emulsified Asphalt Stabilizer) will be measured by the squ are yard.
307.12 Basis of Payment The accepted quantity of Full Depth Re cycled Asphalt
Pavement (Untreated or Treated with Emulsified Asphalt Stabiliz er) will be paid for at the contract unit price per square yard, complete in-place which pr ice will be full compensation for furnishing all equipment, materials and labor for pulverizi ng, blending, placing, grading, compacting, and for all incidentals necessary to complete the w ork. The addition of materials to restore profile grade and/or cross -slope in areas shown on the plans or described in the construction notes will be paid s eparately under designated pay items within the contract. No additional payment will be made f or materials salvaged from the project. Payments will be made under: P a y I t e m P a y U n i t 307.331 Full Depth Recycled Pavement (Untreated) S quare Yard 307.332 Full Depth Recycled Pavement S q u a r e Y a r d (with Emulsified Asphalt Stabilizer) 5 in. depth 307.333 Full Depth Recycled Pavement S q u a r e Y a r d (with Emulsified Asphalt Stabilizer) 6 in. depth 3-13 SECTION 308 FULL DEPTH RECYCLING WITH CEMENT
308.01 Description This work shall consist of pulverizin g a portion of the existing
roadway structure into a homogenous mass, stabilizing the mater ial with cement and placing and compacting this material to the lines, grades, and dimensio ns shown on the plans or established by the Resident. MATERIALS
308.02 Pulverized Material Pulverized material shall con sist of the existing asphalt
pavement and one inch or more as specified of the underlying gr avel, pulverized, and blended into a homogenous mass. Pulverized material will be pr ocessed to 100 percent passing a 2 in square mesh sieve. 308.021 New Aggregate and Additional Recycled Material N ew aggregate, if required by the contract, shall meet the requirements of Subsec tion 703.10 - Aggregate for Untreated Surface Course and Leveling Course, Type A. Aggregate Subbase Course Gravel Type D processed to 100 percent passing a 2 inch square mesh si eve and meeting the requirements of 703.06 – Aggregate for Base and Subbase may be used in areas requiring depths greater than 2 inches. New aggregate will be measured an d paid for under the appropriate item. Recycled material, if required, shall consist of salvaged aspha lt material from the project or from off-site stockpiles that has been processed before use to 100 percent passing a 2 in square mesh sieve. Recycled material shall be conditionally acc epted at the source by the Resident. It shall be free of winter sand, granular fill, const ruction debris, or other materials not generally considered asphalt pavement. Recycled material generated and salvaged from the project shall be used within the roadway limits to the extent it is available as described in 30 8.09. No additional payment will be made for material salvaged from the project. Recycled material supplied from off-site stockpiles shall be p aid for as described in the contract, or by contract modification. 308.022 Portland Cement The Portland Cement shall be Typ e I or II meeting the requirements of AASHTO M85. 308.023 Water Water shall be clean and free from delete rious concentrations of acids, alkalis, salts or other organic or chemical substances. EQUIPMENT
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 227–230 of 817.