401.01 Description.
Division 400
SURFACING AND PAVEMENTS SECTION 401 BITUMINOUS SURFACE TREATMENTS
401.01 Description.
a.General . The work covered by this Section consists of basic bituminous treatments such as prime coat, asphalt flush coats, liquid seals, a nd bituminous surface treatments. This Section also covers the work of applying a bituminous surface treatment containing a polymer additive. Each bituminous treatment shall consist of one or more hot applications of bituminous material and, except for pri me coats, includes a specified cover aggregate which shall be spread after each bituminous application. The work also includes the cleaning of the existing surfaces as well as furnishing and applying all materials, and necessary incidental work thereto, al l in accordance with plan details and these Specifications.
b.Bituminous Treatment Table . The following table shows the amount of bituminous material and the size and amount of cover aggregate required for the various types of bituminous treatments. The types are designated in the table by letters of the alphabet such as A, B, C, D, etc. The proposal will designate in the pay item description which of the various types are to be used. The kind of bitumen may also be specified or, if none is specified, the Contractor may select one of the kinds, if not in conflict with other provisions of these Specifications, permitted by the table. All other requirements of the tabular line opposite the type designation shall apply. (Example: A bituminous treatment Type A KG, specifies a prime coat with the quantities specified on line "A", covered by a single surface treatment with the quantities specified on line "K", covered in turn by a seal treatment with the quantities shown on line "G".) Bituminous materials shall be placed within the tolerance specified by the table for the type treatment involved, unless otherwise ordered by the Engineer in writing. Any variation outside of the designated limits shall be cause for ordering the treatment to be removed and replaced or corrected as directed by the Engineer, all without additional cost to the Department. The rate of aggregate coverage shown by the table is the approximate rate found to produce an acceptable coverage when properly applied. Regardless of the rate shown, th e Contractor shall provide aggregate in sufficient quantities and so spread the aggregate that the bitumen is uniformly and evenly covered. The Engineer will notify the Contractor in writing should it become advisable to change the amounts of any material from the limits specified in the table. In such event an adjustment in the contract unit price will be made as specified in Subarticle 401.06(a).
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 183–182 of 934.