415 SECTION 812
812.01 Water
Use water that is clean and free of oil, acid, alkali, organic matter, and other substances detrimental to the finished product. If the water source is known to be potable, no testing will be required. If the potability of the water is unknown, the Engineer will test the water according to the requirements of Table 812-01. Where the source of water is relatively shallow, enclose the intake to exclude silt, mud, grass, or other solid materials. Table 812-01 Test Requirement Test Method Total Solids by Mass < 2500 ppm ASTM C 1603 Sulfate < 3000 ppm ASTM D 516 Chloride < 500 ppm ASTM D 512 pH from 6.0 to 8.6 If one or more test shown in Table 812-01 exceed the requirements, with the exception of the pH, then the water source is not acceptable. If test results show a pH value less than 6.0 or more than 8.6, the Engineer will determine the compressive strength of mortar mixed using the sampled water in accordance with AASHTO T 106. The 7 day compressive strength will be compared to results obtained using distilled water in place of the sampled water. If the sampled water specimens achieve less than 90 percent of the strength of the distilled water specimens, do not use the water source. Section 816 SECTION 816 AGGREGATES
816.01 General
Provide material consisting of sound, durable particles of gravel or sand which may include limited quantities of fine soil particles as binding material. Use material that is free of any deleterious material or organic material.
816.02 Miscellaneous Aggregates
Supply aggregate that meets the requirements of Table 816- 01. Table 816 -01 Miscellaneous Aggregates Sieve Size Or Testing Method Aggregate Class 2 3 3M 4 5 7 8 13 Percent Passing or Testing Requirement 3 inch 100 1-1/2 inch 100 1 inch 100 100 100 100 3/4 inch 100 80-100 80-100 100 90-100 95-100 70-100 1/2 inch 85-100 3/8 inch 50-95 60-90 No. 4 35-85 35-85 35-85 35-70 15-25 35-80 38-75 No. 8 2-10 22-62 No. 10 0-15 No. 30 0-4 20-50 20-50 10-50 16-40 12-45 No. 200 0-15 4-10 7-17 4-10 0-3 7-15 ND T 113, Shale (max %) 12.0% 12.0% 15.0% 12.0% 8.0% 20.0% 12.0% AASHTO T 96, L.A. Abrasion (max %) 50% 50% 40% 50% NDDOT 4, Fractured Faces1 10% 10% 85% 10% 1 Minimum weight percentage allowable for the portion of the aggregate retained on a No. 4 sieve having at least 1 fractured face for Classes 4, 5, and 13 and at least 2 fractured faces for Class 7. The maximum Plasticity Index (PI) for class 5 aggregate is based on the material gradation and is derived from the following formula: Max PI = 10 − (percent passing the No. 40 sieve ÷ 10) The PI of the material will be determined in accordance with test ND T 90, “Determining the Plastic Limit and Plasticity Index of Soils”.
816.03 Aggregates for Blotter and Seal Coats
Supply aggregate that meets the requirements of Table 816- 02.