§ 11-130. Asphalt stabilized base course.

Asphalt stabilized black base shall meet the AHTD Standard Specification requirements for hot mix asphalt stabilized base course, with the following exceptions:

(1)

The depth of the asphalt stabilized base shall be within ½ inch of the required depth shown in Table 2, Appendix A. The average of all depth measurements shall be not less than the required depth shown in Table 2, Appendix A, and any depth in excess of + ½ inch shall not be used in computing the average depth. When stringlined, the surface shall be within + or - ½ inch of the typical section shown in Appendix B.

(2)

The aggregate shall meet the requirements for SB-2 or SB-3 crushed stone base course.

(3)

The aggregate and asphalt shall be mixed in an approved drum or batch plant, and placed on an approved subgrade with a normal hot mix paver.

(4)

The mixture shall be rolled and compacted while hot to a minimum density of ninety-eight (98) percent of the maximum density as obtained by AHTD proctor design procedures.

(5)

Unless otherwise directed by the County Road Superintendent, a tack coat shall be used between succeeding asphalt layers. The tack shall meet the AHTD Standard Specification requirements for tack coat.

(6)

The supplier shall submit a materials certification containing the aggregate gradation, asphalt type and content, and the unit weight in pounds per cubic foot.

(Ord. No. 91-9, Art. 1, § 4.11, 4-11-91; Ord. No. 99-32, Art. 1, 7-8-99)