1. The aggregate base course material shall consist of an intimate mixture of graded aggregate, coarse and fine, and shall be practically free from vegetation or other deleterious substances. Coarse aggregate (material retained on a No. 10 (2.00mm) sieve) shall consist of sound, tough, durable particles or fragments of gravel, stone, mine chats, disintegrated granite, crushed concrete, or a combination thereof. Fine aggregate shall be sand, stone dust, or other inert, finely-divided mineral matter. a. At least 40 percent of that portion of the completed mixture retained on the No. 4 (4.75 mm) sieve shall be composed of uniformly graded crushed particles (pieces of aggregate with one or more fractured faces resulting from artificial crushing). 2. The coarse aggregate retained on the 3/8 inch (9.5 mm) sieve of the finished mixture shall have a percent of wear. Los Angeles Abrasion Test, of not more than 45. No source of material used in the blend shall have a percent of wear of more than 45. The aggregate shall have an aggregate durability index of 40 or more
