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DLA005-86-B-0008 PAGE 12 OF 69 2-07.1 Msteriais: 2-07.1.1 Asohalt: AR4CG0. 57 to 7.51. 2-07.1.2 Pp-grceate: T�;pe B, 3/4 inch max. 2-07.1.3 Pr zzr: MC-70 or SS-1. 2-07.2 Weather U-nutations: Bite-.mous course shall be constructed only wran base course and existing pavement is dry and when weather is not rainy. Bitzainc*us course shall rot be constructed when temperature of the surface of existing pavement or base course is below 40° F. 2-07.3 Treatment of Underlying Surface: Prior to laying a bit=incus course, the unaerlying surzace shall be cleaned .of loose and foreign nis-tter. The surface to be paved shall receive a prime coat. 2-07.4 Mixing: Temperature of asphalt at time of mixing shall not exceed 325 F. Temperature of aggregate and mineral filler in the mixer shall rot exceed 325° F. when asphalt is added. 2-07.5 Ccrnaction shall consist of a minimum of 3 passes with a vibratory steel whael roller. In areas not accessable to the roller the mixture shall be compacted with hand tampers. The compacted surface shall be smooth and free frau irregularities. Depth of any lift prior to rolling shall not exceed the maria= depth the roller is capable of compacting. 2-07.6 Protection of Payment: no vehicular traffic shall be p-sm-itted on tie pa;nnent for aL least 6 hours aft-,r final rolling. 2-08. CONCRETE: Corcrete shall be poured in place without reinforcement. Prco or oning of concrete m.L-es to meet the requirements specified below shall be the Contractor's responsibility. 2-08.1 Compressive Streneth shall be a mini== of 3,000 psi in 28 days. 2-08.2 Proportioain EE0f Concrete mixes shall be by volume and could be preparea at e ..or,c site. 2-08.3 Con acticn: Czncrete s,tnll be poured in place and compacted by mycnanicaaii r_�.,ns, s=lcmented by iuird spading, redding, and tappiu o as directed by e the Contracting Officer. Concsece shall be compacted, screeded to grade. 2-n3