11-20-97

601-R-348
COARSE AGGREGATE

The Standard Specifications are revise as follows:

SECTION 608, BEGIN LINE 9, DELETE AND INSERT AS FOLLOWS:
      608.02 Materials. Materials shall be in accordance with the following:

            Coarse Aggregates, Class A, B, C, or D, or E, Size
                No. 8, 11, or 12............................................................904.02

SECTION 904, BEGIN LINE 374, DELETE AND INSERT AS FOLLOWS:
         (c) Exceptions to AASHTO T 27 for Coarse Aggregates. The size of test samples for coarse aggregate shall be as follows:

1.  The size of test samples for coarse aggregate shall be as follows:

                        Aggregate Size                                        Minimum Mass (Weight)
                                                                                                      of Test Sample

                        No. 1.........................................................68-90.7 kg (150-200 lb)
                        No. 2.........................................................................11.3 kg (25 lb)
                        No. 5, 8, 53, and 91.............................................................(6-8 kg)
                        No. 9 and 11........................................................................(4-6 kg)
                        *Subbase.............................................................................(4-6 kg)
                        *B Borrow...........................................................................(4-6 kg)

        *If subbase or B borrow is fine aggregate, at least 90 percent passing the 4.75 mm (No. 4) sieve, the test sample shall be approximately 500 grams.

2. The sieving efficiency test will be performed quarterly on one sample for each sieving device in accordance with Section 7.4. A record of the test results will be maintained on file as documentation for verification of the apparatus.