Section 315 — Recycled Aggregate
Description
315.01This work consists of providing and placing recycled aggregate using asphalt concrete pavement millings and existing aggregate.
Material
315.02Conform to the following Subsection: Water for construction 725.01(c)
Construction Requirements
315.03General. Prepare the surface according to Section 204 or 303, as applicable. Provide recycled aggregate obtained under Section 304 or 413 with 100 percent passing the 1½-inch sieve.
315.04Mixing and Spreading. Place recycled aggregate to the limits shown in the plans. Place enough material to bring the final surface to established line, grade, and cross-section. Mix the recycled aggregate to its full depth. During mixing add water to provide the opti mum moisture content for compaction. After mixing, spread to the thickness and cross-section shown in the plans. 315.05 Compacting. If no compaction method is specified, use either method.
(a)Method 1. Compact each lift according to Subsection 204.11(a) . Roll from the sides to the center, parallel to the centerline of the road. Compact the material along curbs, headers, walls, and places not accessible to a roller with approved tampers or compactors. Compactive effort may be decreased if in -place densities show that less compactive effort is required under Method 2.
(b)Method 2. Compact each lift according to Subsection 301.05. Produce a surface that is smooth, dense, and without ruts, ridges, and loose material.
315.06Surface Tolerance. Finish the surface according to Subsection 301.06.
315.07Maintenance. Maintain the recycled aggregate according to Subsection 301.07.
315.08Acceptance. See Table 315-1 for sampling, testing, and acceptance requirements. Recycled aggregate will be evaluated under Subsections 106.02 and 106.04. Construction of recycled aggregate will be evaluated under Subsections 106.02 and 106.04. Preparation of the surface for placement of recycled aggregate will be evaluated under Section 204 or 303, as applicable.
Measurement
315.09Measure the Section 315 pay items listed in the bid schedule according to Subsection 109.02 and the following as applicable: When measuring recycled aggregate by the cubic yard, measure in place.
Payment
315.10The accepted quantities will be paid at the contract price per unit of measurement for the Section 315 pay items li sted in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05 . Table 315-1 Sampling, Testing, and Acceptance Requirements
Material or
Product Type of
Acceptance
(Subsection) Characteristic Category Test Methods
Specifications Sampling
Frequency Point of
Sampling Split
Sampl
e Reporting
Time Remarks
Production
Crushed
aggregate Measured & tested for conformance (106.04 ) Moisture - density − AASHTO T 180, Method D(1) 1 per aggregate supplied Production output or stockpile No 4 hours For Method 2 compaction only Density − AASHTO T 310 or other approved procedures 1 per 1500 yd2 per lift
In-place
after compaction " End of shift "
Crushed
aggregate Process control (153.03) Moisture content (in-place) − AASHTO T 310 or other approved procedures 1 per 1500 yd2 per lift
In-place
after compaction No End of shift For Method 2 compaction only
Finished Product
Crushed
aggregate Measured & tested for conformance (106.04 ) Surface tolerance & grade − Subsection
315.06As directed Surface of final course No Before placement of next lift or as requested −
(1)At least 5 points per proctor. 306 DIVISION 400