1980-06-30 Special Called Meeting

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. ~ • Retained on 1/2" sieve. .20-35 Retained on 3/8" sieve. 85-100 Retained en 1/4" sieve. 95-100 • Retained on No. 10 sieve. 99-100 Grade 4: Retained on 5/8" sieve. .0 Retained on 1/2" sieve. 0-2 Retained on 3/8" sieve. 20-35 Retained on No. 4 sieve 95-100 Retained on No. IO sieve. 99-100 Grade 5: Retained on 3/8" sieve. .0 Retained on 114" sieve. .0-5 Retained on No. 10 sieve. 99-100 The aggregate shall not contain more than 1.0 percent by weight of fine dust, clay-like particles and/or silt present when tested in accordance with Test Method Tex-217-F, Part 2. Precoated Aggregates, Precoated aggregates shall be aggregates of the type specified, treated (coated or fluxed) with 0.5 to 1.5 per- cent by weight of precoat material or flux oil meeting the require- ments of this specification and the approval of the Engineer. The particular grade of precoated aggregate specified shall meet all requirements of Article 304.4. prior to the application of the pre- coat material or flux oil. Water. Water in an amount not to exceed 3 percent by weight of the mixture may be used in preparing the mixture. The water shall be added as directed by the City during the mixing, in .the event water is used in the mixing poeration adequate measuring devices shall be used and the water shall be administered to the mix through an approved spray bar. Physical Properties of the Mixture. The materials may be mixed on the job or at some central mixing plant and shipped ready for use. Mixes that do not remain workable a sufficient period of time or maintain flow qualities such that the precoated aggregate may be satisfactorily spread by normal approved mechanical spreading devices will not be acceptable. Materials that are not uniformly and/or properly coated or fluxed, as determined by the Department's standard testing procedures or in the opinion of the Engineer, will not be accepted for use. ITEM 305 AGGREGATE FOR SURFACE TREATMENTS (Precoated) (Class A) Description. This item establishes the requirements for precoated aggregate to be used in the consturction of surface treatments. (14)