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- 30-2.02B Sand Cover Reserved 30-2.02C Supplementary Aggregate
- 30-2.03C Spreading Reserved 30-2.03D Compacting and Grading
- 30-2.04 PAYMENT Not Used 30-3 FULL DEPTH RECLAMATION—FOAMED ASPHALT 30-3.01 GENERAL
- 30-3.01B Definitions Lot
- 30-3.01C(2)(c) Quality Control Reporting
- 30-3.01D Quality Assurance
- 30-3.01D(1)(b) Preoperation Meeting
- 30-3.01D(2) Quality Control
- 30-3.01D(2)(c) Quality Control Sampling and Testing
- 30-3.01D(3) Department Acceptance
30-2.02 MATERIALS30-2.02A GeneralThe quality characteristics of pulverized roadbed must comply with the requirements shown in the following table:
30-2.02B Sand CoverReserved 30-2.02C Supplementary AggregateIf supplementary aggregate is specified, supplementary aggregate must comply with the specifications for Class 2 aggregate base in section 26. 30-2.03 CONSTRUCTION30-2.03A GeneralReserved 30-2.03B EquipmentPulverizing equipment must: 1. Be a self-propelled reclaiming machine 2. Pulverize the existing pavement and underlying material to the required size 3. Mix the pulverized pavement, underlying material, and water into a homogeneous and uniform mixture 4. Be equipped with automatic depth controls capable of maintaining the cutting depth to within 0.05 foot of the depth shown 5. Have a minimum 8-foot wide cutter that can remove the existing pavement to the specified depths Compacting equipment must be a sheepsfoot roller, a vibratory steel-tired roller, and a pneumatic-tired roller. All compacting equipment must be self-propelled and reversible. The frequency of amplitude of vibrating rollers must be adjustable and exceed a static force of 15 tons in vibratory mode. 30-2.03C SpreadingReserved 30-2.03D Compacting and GradingReserved 30-2.03E FinishingThe finished surface must be free from segregation, tearing, and scarring, and have a uniform surface texture throughout the work limits. Maintain the pulverized roadbed surface free of ruts, bumps, indentations, raveling, and segregation. Repair damaged pulverized roadbed with minor HMA. 30-2.04 PAYMENTNot Used 30-3 FULL DEPTH RECLAMATION—FOAMED ASPHALT 30-3.01 GENERAL30-3.01A SummarySection 30-3 includes specifications for constructing a reclaimed pavement base using FDR—foamed asphalt. Constructing an FDR—foamed asphalt base includes: 1. Pulverizing existing asphalt concrete and existing underlying materials 2. Mixing with water, foamed asphalt, cement, and if required, supplementary aggregate 3. Grading and compacting the mixture 4. Applying asphaltic emulsion 30-3.01B DefinitionsLot: 1000 sq yd of FDR—foamed asphalt 30-3.01C Submittals30-3.01C(1) GeneralWith the QC plan, submit the mix design. 30-3.01C(2) Quality Assurance Submittals30-3.01C(2)(a) GeneralReserved 30-3.01C(2)(b) Mix DesignSubmit FDR—foamed asphalt mix design under California Test 313. With the mix design forms, include actual test results, worksheets, photographs, and graphs. The mix design submittal must be sealed and signed by an engineer who is registered as a civil engineer in the State. 30-3.01C(2)(c) Quality Control ReportingWith the daily report specifed in section 30-1.01C(2)(c), submit the following based on the testing frequencies specified or if not specified, once per lot: 1. General Information: 1.1 Weather: 1.1.1. Ambient air temperature before starting daily FDR—foamed asphalt activities including time of temperature reading 1.1.2. Road surface temperature before starting daily FDR—foamed asphalt activities including time of temperature reading 2. Asphalt binder: 2.1. Injection rate from controller 2.2. Temperature in degrees F from thermometer in the asphalt binder feed line for each truck load 3. Water application rate by percent dry weight of FDR—foamed asphalt from the controller 4. Average forward speed of pulverizing equipment 5. FDR—foamed asphalt core thickness in feet and location of coring
Before each day of HMA paving, submit a report of the moisture content at mid depth based on the frequency specified in section 30-3.01D(2)(c) for the area to be paved that day. 30-3.01D Quality Assurance30-3.01D(1) General30-3.01D(1)(a) GeneralRelative compaction must be determined under California Test 231 and the following: 1. Nuclear gauge counts are taken at 3 elevations within the FDR—foamed asphalt layer identified as E1, E2, and E3 measured from the finished FDR—foamed asphalt surface as follows: 1.1. E1 = 1/3 x (FDR—foamed asphalt thickness - 1 inch). 1.2. E2 = 2/3 x (FDR—foamed asphalt thickness - 1 inch). 1.3. E3 = (FDR—foamed asphalt thickness - 1 inch). 1.4. Do not take nuclear gauge counts at elevations less than 2 inches below finished surface. 2. Correction for oversize material does not apply. 3. A sample must contain no more than 5 percent retained on the 1-inch sieve and 10 percent retained on the 3/4-inch sieve. 4. Use the laboratory wet test maximum density closest in proximity to the lot to determine relative compaction. If the relative compaction for a lot is less than 98 percent, perform California Test 216 and California Test 226 for each noncompliant lot and recalculate the relative compaction. 5. Measure relative compaction at each elevation E1, E2, and E3. Do not average the elevation compaction measurements at each location. Before starting FDR—foamed asphalt activities, calibrate the asphalt meter in the presence of the Engineer in compliance with the material plant quality program. The Engineer determines the frequency of testing and calibration. Before placing HMA, test moisture content at mid depth of the FDR—foamed asphalt layer under California Test 226. Sampling must not introduce water to the material. Test in the Engineer's presence. 30-3.01D(1)(b) Preoperation MeetingIn addition to the listed personnel in section 30-1.01D(2), the preoperation meeting must be attended by your: 1. FDR—foamed asphalt machine operators 2. Grading and compacting equipment operators
30-3.01D(1)(c) Test StripThe Engineer tests each test strip under section 30-3.01D(3) and California Test 371. 30-3.01D(2) Quality Control30-3.01D(2)(a) GeneralReserved 30-3.01D(2)(b) Mix Design Sampling and TestingThe FDR—foamed asphalt mix design process must comply with California Test 313. Notify the Engineer at least 2 business days before sampling for a mix design. Obtain representative pavement and underlying base material samples for FDR—foamed asphalt from the test pits. If additional samples of subgrade material are needed, test pits can be excavated outside the edge of pavement to variable dimensions. Characterize and record test pit features such as layer thicknesses and types, distresses, interlayers, thin or thick areas, digouts, and adhesion to the base. Use the sampled material to determine the mix design according to the proportions of the pavement structure shown. Before opening the mix design sampling locations to traffic, backfill test pits by replacing and compacting the remaining excavated materials. Place and compact authorized material or minor HMA complying with section 39-2.07 to the existing grade and thickness of AC, in the Engineer's presence. When mix design sampling is complete at all locations, remove authorized backfill material at test pit locations and place and compact with minor HMA to existing grade. 30-3.01D(2)(c) Quality Control Sampling and TestingAssign a ground supervisor whose sole purpose is to monitor the FDR—foamed asphalt activities, advise project personnel, and interface with the quality control testing personnel. The ground supervisor must not have any sampling or testing duties. Perform sampling and testing for each test strip and at the specified frequency for the quality characteristics shown in the following table:
Take a 1-quart asphalt binder sample and record the temperature from the truck for each load delivered to the job site. Sample asphalt binder in the Engineer's presence and provide the sample to the Engineer. Take 1 thickness core for every lot. Record the location and station or postmile for each thickness core. 30-3.01D(3) Department AcceptanceThe Department accepts FDR—foamed asphalt based on: 1. Visual inspection for: 1.1. Segregation, raveling, and loose material 1.2. Variance of more than 0.05 foot measured from the lower edge of a 12-foot straightedge 1.3. Uniform surface texture throughout the work limits 1.4. Repaired areas 2. Compliance with the quality characteristics shown in the following table:
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