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2026 Pavement Maintenance Overlay Special Provisions <br />PW# 3860 SP - 60 March 5, 2026 <br />1 will also be the Upper Specification Limit (USL) and Lower Specification Limit <br />2 (LSL) required in Section 1-06.2(2)D2 <br />3 <br />Property Non-Statistical Evaluation Commercial Evaluation <br />Asphalt Binder +/- 0.5%+/- 0.7% <br />Air Voids, Va 2.5% min. and 5.5% max N/A <br />4 <br />5 For Aggregates in the mixture: <br />6 <br />7 a. First, determine preliminary upper and lower acceptance limits by applying <br />8 the following tolerances to the approved JMF. <br />9 <br />Aggregate Percent <br />Passing <br />Non-Statistical <br />Evaluation <br />Commercial <br />Evaluation <br />1, , ‰, and 3/8 sieves +/- 6%+/- 8% <br />No. 4 sieve +/-6%+/- 8% <br />No. 8 Sieve +/- 6%+/-8% <br />No. 200 sieve +/- 2.0%+/- 3.0% <br />10 <br />11 b. Second, adjust the preliminary upper and lower acceptance limits <br />12 determined from step (a) the minimum amount necessary so that none of <br />13 the aggregate properties are outside the control points in Section 9- <br />14 03.8(6), except as specified below in (c). The resulting values will be the <br />15 upper and lower acceptance limits for aggregates, as well as the USL and <br />16 LSL required in Section 1-06.2(2)D2. <br />17 c. These tolerances and specification limits constitute the allowable limits as <br />18 described in Section 1-06.2. The tolerance limit for aggregate shall not <br />19 exceed the limits of the control points, except the No. 8 tolerance is +/- 6% <br />20 from the JMF, the No. 200 tolerance is +/- 2.0% from the JMF with a <br />21 minimum of 2% and a maximum of 8.0% passing the No. 200 sieve. Other <br />22 tolerance limits for sieves designated as 100 percent passing will be 99- <br />23 100 <br />24 <br />25 2.Job Mix Formula Adjustments An adjustment to the aggregate gradation or <br />26 asphalt binder content of the JMF requires approval of the Engineer. Adjustments <br />27 to the JMF will only be considered if the change produces material of equal or <br />28 better quality and may require the development of a new mix design if the <br />29 adjustment exceeds the amounts listed below. <br />30 <br />31 a.Aggregates 2 percent for the aggregate passing the 1½″, 1″, ¾″, ½″, ⅜″, and <br />32 the No. 4 sieves, 1 percent for aggregate passing the No. 8 sieve, and 0.5 <br />33 percent for the aggregate passing the No. 200 sieve. The adjusted JMF shall <br />34 be within the range of the control points in Section 9-03.8(6). <br />35 <br />36 b.Asphalt Binder Content The Engineer may order or approve changes to <br />37 asphalt binder content. The maximum adjustment from the approved mix <br />38 design for the asphalt binder content shall be 0.3 percent. <br />39 <br />40 5-04.3(9)A Vacant <br />41