401.1 General Description
This specification contains requirements for a mixture of mineral aggregates and cutback asphalt suitable for short periods of stockpiling.
401.1.01 Definitions
General Provisions 101 through 150.
401.1.02 Related References
A. Standard Specifications Section 800—Coarse Aggregate Section 802—Aggregates for Asphaltic Concrete Section 820—Asphalt Cement Section 821—Cutback Asphalt Section 824—Cationic Asphalt Emulsion B. Referenced Documents ASTM D 396 ASTM D 975
401.1.03 Submittals
General Provisions 101 through 150.
401.2 Materials
Ensure that materials meet the following specifications: Material Section Cationic Asphalt Emulsion, CMS-2 824.2.01 Cutback Asphalt, Grade MC-250 821.2.01 Asphalt Cement, PG 64-22 820.2.01 Liquifier, No. 2 Fuel Oil ASTM D 396 Liquifier, No. 2 Diesel Fuel Oil ASTMD 975 Fine Aggregate for Asphaltic Concrete 802.2.01 Coarse Aggregate for Asphaltic Concrete 802.2.02 For a list of sources, see QPL 70. A. Substitutions Instead of using MC-250 as a bituminous material, a mixture of PG 64-22 and either No. 2 heating fuel oil or No. 2 diesel fuel oil may be used in a blend of 67 percent PG 64-22 and 33 percent fuel oil. Blend these materials before mixing or add them separately when mixing. B. Composition of Mixtures Ensure that bituminous cold mixtures are uniform mixtures of aggregate, asphaltic material and, if required, mineral filler. Ensure that the constituents are proportioned to produce mixtures that meet the requirements given in the Composition Table. Group I aggregate, Group II aggregate, or a blend of both may be used. Aggregate meeting gradation the requirement for size 89 aggregate in Section 800 may be used instead of composite blends, at the Engineer’s discretion. Composition Table for Cold Mixes for Bituminous Plant Mixtures for Patching Cold Mix Type 12.5 mm Superpave 9.5 mm Superpave (Level B) 9.5 mm Superpave (Level A) Gradation Requirements, Percent Passing, by Weight 3/4 in. (19 mm) sieve 100 1/2 in. ((12.5 mm) sieve 90 to 100 100 100 3/8 in. (9.5 mm) sieve 70 to 89 90 to 100 90 to 100 No. 4 (4.75 mm) sieve 55 to 75 65 to 85 No. 8 (2.36 mm) sieve 34 to 39 42 to 47 53 to 58 No. 50 (300 µm) sieve 8 to 27 8 to 27 10 to 35 No. 200 (75 µm) sieve 3.5 to 7.0 4 to 7 4 to 7 Percent Residual AC, by Weight of Total Mixture 4.3 to 6.5 4.3 to 7.0 4.5 to 7.0 C. Mixing Temperature The recommended temperatures for aggregate and bituminous materials to ensure proper mixing are as follows: CMS-2 140-160 °F (60-70 °C) PG 64-22 300-350 °F (150-175 °C) MC-250 100-225 °F (40-105° C) Aggregates 200-225 °F (95-105 °C)
401.2.01 Delivery, Storage, and Handling
A. Stockpiling the Mixture 1. Place the finished mixture in small stockpiles to allow the mixture to cure properly. 2. After curing, stockpile the mixture in one large stockpile if possible. 3. Ensure that the stockpiling area is clean and well drained.
401.3 Construction Requirements
General Provisions 101 through 150.
401.3.01 Personnel
General Provisions 101 through 150.
401.3.02 Equipment
General Provisions 101 through 150.
401.3.03 Preparation
General Provisions 101 through 150.
401.3.04 Fabrication
General Provisions 101 through 150.
401.3.05 Construction
General Provisions 101 through 150.
401.3.06 Quality Acceptance
General Provisions 101 through 150.
401.3.07 Contractor Warranty and Maintenance
General Provisions 101 through 150.
401.4 Measurement
Cold mix will be measured by weight in tons (megagrams) according at Subsection 109.01, Measurement and Quantities, and no deductions will be made for the asphalt cement or liquifier.
401.4.01 Limits
General Provisions 101 through 150.
401.5 Payment
Cold mix will be paid for at the Contract Unit Price per ton (megagram). Payment is full compensation for materials costs, production costs, and shall be FOB the stockpile at the plant. Payment will be made under: Item No. 401 Cold mix Per ton (megagram)
401.5.01 Adjustments
General Provisions 101 through 150.
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