422 Chip Seal With Polymer Binder

1. Specification:

Item 422.02 C&MS

2. Sampling and/or Inspection Requirements:

Test Strip:

Construct a continuous 1000 foot (300 m) long by lane width test strip. The Engineer will review the test strip the next workday. Determine the polymer binder application rate, aggregate application rate, and aggregate gradation during the test strip. If the review shows the test strip meets the requirements of 422.11 and the application rate and quality control tests show all is in control compared to the JMF, then progress with the work. Should problems be noted, the Engineer may require another test strip.

The Department will waive the test strip if the Contractor has constructed a Department accepted test strip using the same materials and JMF in the same season.

Quality Control:

Use the methods described in this section to measure compliance. If the Contractor's test results exceed any of the identified quality control tolerances, the Contractor shall stop placement and immediately notify the Engineer and DET. Identify the cause of exceeding any of the identified quality control tolerances and document in detail the corrective action necessary to bring the deficience into compliance.

The Engineer will give approval before resumption of work. Upon resuming work, take another sample and immediately provide the test results to the Engineer. If tolerances are exceeded, stop the work. Do not resume work until approved by the Engineer and DET. The DET can obtain samples at any time.

For the polymer binder application rate, as determined by a yield check, do not exceed a tolerance of 0.02 gallons per square yard (0.09 L/square meter) from the established application rate. Label and retain one sample per day for the Department.

Sample and test aggregate according to AASHTO T 2, AASHTO T 248, and Supplement 1004 (AASHTO T 11 where required). If problems persist with dry gradation results, perform washed gradation.

Reject truckloads of aggregate if water is seen coming from the truck bed. Reject aggregate that does not meet requirements shown in Item 422.10 C.

Provide the Engineer a daily report with the following:

Control section, project number, county, route

Date, air temperature, pavement temperature and humidity

Polymer binder temperature

Yield checks on polymer binder (minimum three per day)

Gradation, moisture content, and station (one at start of daily production, minimum)

Length, width and total area

Condition of "Loose Stone" signs with "35 mph" speed plaques

Contractor representative's signature

Provide a bill of lading for polymer binder and aggregate as requested or at project completion.

During the application of the chip seal inspect the chip seal for deficiencies resulting from poor workmanship, flushing, tracking from equipment, surface patterns, loss of stone, and sweeping. Inspect workmanship for untreated areas, minimum overlay on longitudinal joints, and minimum overlap on construction joints.

Daily Acceptance:

Finished surface should not have more than four tears or untreated areas greater than 1 inch (25 mm) wide and 4 inches (100 mm) long in any 120 square yard (100 square meter) area.

Joints must appear neat and uniform without buildup, uncovered areas, or unsightly appearance.

Longitudinal joints must have less than a 2 inch (50 mm) overlay on the adjacent passes. Transverse joints must have no more than inch (6 mm) difference in elevation across the joint as measured with a 6 foot (2 m) straightedge.

Chip seal edge is neat and uniform along the roadway lane, shoulder and curb lines. Chip seal edge has no more than 2 inch (50 mm) variance in any 100 feet (30 m), along the roadway edge or shoulder.

Project Acceptance:

The Contractor and Engineer will review the completed work 25 to 35 days after placement. All corrective work must be performed to the satisfaction of the Engineer.

3. Method of Tests:

AASHTO T 2, T 248, T 11