1980-06-30 Special Called Meeting

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• • THE DESCRIBED MATERIAL SHALL BE PRICED PER TON, F.O.B. LA PORTE OR PICKED UP AT THE POINT OF ORIGIN. • Item 301 AGGREGATE FOR SURFACE TREATMENTS (Class A) Description. This item establishes the requirements for agg- regate to be used in the construction of surface treatments. Materials. Aggregates shall be composed of clean, tough and durable particles of gravel, crushed gravel, crushed stone, crushed slag or natural limestone"rock asphalt. These mater- ials shall not contain more than 5 percent by weight of soft particles and other deleterious materials as determined by Test Method Tex-217-F, Part 1. The natural limestone rock asphalt aggregate furnished shall have an average bitumen content from 4 to 8 percent by weight of naturally impregnated asphalt, as determined by Test Method Tex-215-F, and shall contain not more than 2 percent by weight of any one of or combination of iron pyrites, or other object- ionable matter, as determined by Test Method Tex-217-F, Part 1. No aggregate shall contain a total of more than 5 percent by weight of impurities or objectionable matter listed above. The percent of wear, as determined by Test Method Tex-410-A, for each of the materials shall not exceed 35 percent. , The percent of wear on natural limestone rock asphalt aggregate as determined by Test Method Tex-410-A shall be made on that portion of the material retained on the No.4 sieve, having a naturally impregnated asphalt content of less than 1 percent. Crushed gravel shall have a minimum of $.~ percent of the_part- icles retained on the No. 4 sieve with at least one crushed face, as determined by Test Method Tex-413-A. Types. The various types of aggregates Type A. Type A aggregate shall consist crushed stone or natural limestone rock Type B. Type B aggregate shall consist slag, crushed stone or natural limestone Type C. Type C aggregate shall consist crushed stone. are identified as follows: of gravel, crushed slag, asphalt. of crushed gravel, crushed rock asphalt. of gravel, crushed slag or Type D. Type D aggregate shall consist of crushed gravel, crushed __ • slag yr crushed stone. Type E. Type E aggregate shall consist of natural limestone rock asphalt. C8)