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2024 Pavement Maintenance Overlay SPECIAL PROVISIONS PW# 3823 55 will also be the Upper Specification Limit (USL) and Lower Specification Limit 1 (LSL) required in Section 1-06.2(2)D2 2 Property Non-Statistical Evaluation Commercial Evaluation Asphalt Binder +/- 0.5% +/- 0.7% Air Voids, Va 2.5% min. and 5.5% max N/A For Aggregates in the mixture: 3 a. First, determine preliminary upper and lower acceptance limits by applying the 4 following tolerances to the approved JMF. 5 Aggregate Percent Passing Non-Statistical Evaluation Commercial Evaluation 1”, ¾”, ½”, and 3/8” sieves +/- 6% +/- 8% No. 4 sieve +/-6% +/- 8% No. 8 Sieve +/- 6% +/-8% No. 200 sieve +/- 2.0% +/- 3.0% b. Second, adjust the preliminary upper and lower acceptance limits determined 6 from step (a) the minimum amount necessary so that none of the aggregate 7 properties are outside the control points in Section 9-03.8(6). The resulting 8 values will be the upper and lower acceptance limits for aggregates, as well as 9 the USL and LSL required in Section 1-06.2(2)D2. 10 2. Job Mix Formula Adjustments – An adjustment to the aggregate gradation or 11 asphalt binder content of the JMF requires approval of the Engineer. Adjustments 12 to the JMF will only be considered if the change produces material of equal or 13 better quality and may require the development of a new mix design if the 14 adjustment exceeds the amounts listed below. 15 a. Aggregates –2 percent for the aggregate passing the 1½″, 1″, ¾″, ½″, ⅜″, and 16 the No. 4 sieves, 1 percent for aggregate passing the No. 8 sieve, and 0.5 17 percent for the aggregate passing the No. 200 sieve. The adjusted JMF shall 18 be within the range of the control points in Section 9-03.8(6). 19 b. Asphalt Binder Content – The Engineer may order or approve changes to 20 asphalt binder content. The maximum adjustment from the approved mix 21 design for the asphalt binder content shall be 0.3 percent 22 23 5-04.3(9)A Vacant 24 25 5-04.3(9)B Vacant 26 27 5-04.3(9)C Mixture Acceptance – Nonstatistical Evaluation 28 HMA mixture which is accepted by Nonstatistical Evaluation will be evaluated by the 29 Contracting Agency by dividing the HMA tonnage into lots. 30 31 5-04.3(9)C1 Mixture Nonstatistical Evaluation – Lots and Sublots 32 A lot is represented by randomly selected samples of the same mix design that will be 33 tested for acceptance. A lot is defined as the total quantity of material or work produced 34 for each Job Mix Formula placed. Only one lot per JMF is expected. A sublot shall be 35 equal to one day’s production or 800 tons, whichever is less except that the final sublot 36 will be a minimum of 400 tons and may be increased to 1200 tons. 37 38 All of the test results obtained from the acceptance samples from a given lot shall be 39 evaluated collectively. If the Contractor requests a change to the JMF that is approved, 40