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CITY OF EVERETT SPECIAL PROVISIONS I <br /> 5-04.3(9)A HMA Tolerances and Adjustments ry I <br /> 1. Job Mix Formula Tolerances — Provide mixture at the time of <br /> acceptance within the following tolerances: <br /> For Asphalt Binder and Air Voids (Va), the acceptance limits are determined <br /> by adding the tolerances below to the approved JMF values. These values <br /> will also be the Upper Specification Limit (USL) and Lower Specification Limit <br /> (LSL) required in Section 1-06.2(2)D2. <br /> Property Non-Statistical Commercial <br /> Evaluation Evaluation <br /> Asphalt +/- 0.5% +/- 0.7% <br /> Binder I <br /> Air Voids, Va 2.5% min. and 5.5% N/A <br /> max <br /> For Aggregates in the mixture: <br /> a. First, determine preliminary upper and lower acceptance limits by applying <br /> the following tolerances to the approved JMF. <br /> Aggregate Percent Non-Statistical Commercial Evaluation <br /> Passing Evaluation <br /> 1", 3/", 1/2", and 3/8" sieves +/- 6% +/-8% 1 <br /> No. 4 sieve +/-6% +/- 8% <br /> No. 8 Sieve +/- 6% +/-8% <br /> No. 200 sieve +/- 2.0% +/- 3.0% <br /> b. Second, adjust the preliminary upper and lower acceptance limits <br /> determined from step (a) the minimum amount necessary so that none of <br /> the aggregate properties are outside the control points in Section 9-03.8(6). <br /> The resulting values will be the upper and lower acceptance limits for <br /> aggregates, as well as the USL and LSL required in Section 1-06.2(2)D2. <br /> 2. Job Mix Formula Adjustments — An adjustment to the aggregate <br /> gradation or asphalt binder content of the JMF requires Engineer's <br /> approval. Adjustments to the JMF will only be considered if the change <br /> produces material of equal or better quality and may require the <br /> development of a new mix design if the adjustment exceeds the <br /> amounts listed below. <br /> 111 a. Aggregates — 2 percent for the aggregate passing the 1'/", 1", <br /> 3/" %" %" and the No. 4 sieves, 1 percent for aggregate <br /> passing the No. 8 sieve, and 0.5 percent for the aggregate <br /> passing the No. 200 sieve. Provide the adjusted JMF within the <br /> range of the control points in Section 9-03.8(6). <br /> b. Asphalt Binder Content — The Engineer may order or approve <br /> changes to asphalt binder content. The maximum adjustment11 <br /> from the approved mix design for the asphalt binder content is <br /> 0.3 percent. I <br /> I <br /> Water Main Replacement"W" Division 5—SURFACE TREATMENTS <br /> April,2022 <br /> WO No.—UP3766 AND PAVEMENTS <br /> SP-156 I <br />