1980-06-30 Special Called Meeting

Browse Search

• The percent of wear on limestone rock asphalt aggregate shall be no more than 40 as determined by Test Method Tex- 410-A and shall be made on that portion of the material re- • tained on the X10. 4 sieve having a naturally impregnated asphalt content of less than 1 percent. No material shall be used before the source has been approved and the material has been sampled, tested and approved by the City. The Contractor shall notify the City in advance if change in source of any material is desired, and both the new source and material shall be approved by the City prior to use. Asphalt Materail (a) Flux. The fluxing material shall meet the Flux Oil requirements of the Item, "Asphalts, Oils and Emulsions". (b) Tack Coat. The asphalt material for tack coat shall meet the requirements for emulsified asphalt, EA-11M, or cut- back asphalt, RC-2. If RC-2 cut-back asphalt is used it may, upon instruction from. the City, be diluted by the addition of an approved grade of gasoline and/or keroses, not to exceed I5 percent by volum. Asphaltic materials shall meet the require- ments of the Item, "Asphalts, Oils and Emulsions". 330.3 Paving Mixtures. Types. The paving mixture shall consist of a uniform mixture of crushed limestone rock asphalt aggregate, flux, and water if • needed. The grading shall be such as to produce, when properly proportioned, a mixture which, when tested in accordance with Test Method Tex-200-F, will conform to the limitations for grading given below for the type specified prior to the application of the fluxing material to the limestone rock asphalt aggregate. The grading to be used in these mixtures, within the limits specified, shall be approximately as designated by the City, and the mixture produced shall be uniform. Precent Type "A" by sleight Retained on 1" Sieve 0 Retained on. 7/ 8" Sieve 0 to 2 Retained on 5/8" Sieve 5 to 15 Retained on 3/8" Sieve .25 to 35 Retained on No. 4 Sieve. .50 to 60 Passing No . 10 S ieve . 25 to 35 (9)