Granite Construction 5/14/2020 - Laserfiche WebLink

I 1 5-04.3(9) HMA Mixture Acceptance 2 Acceptance of HMA shall be as provided under nonstatistical, or commercial evaluation. 3 I 4 Nonstatistical evaluation will be used for the acceptance of HMA unless Commercial 5 Evaluation is specified. 6 7 Commercial evaluation will be used for Commercial HMA and for other classes of HMA in 8 the following applications: sidewalks, road approaches, ditches, slopes, paths, trails, gores, 9 prelevel, temporary pavement, and pavement repair. Other nonstructural applications of I 10 HMA accepted by commercial evaluation shall be as approved by the Engineer. Sampling 11 and testing of HMA accepted by commercial evaluation will be at the option of the Engineer. 12 I 13 The mix design will be the initial JMF for the class of HMA. The Contractor may request a 14 change in the JMF. Any adjustments to the JMF will require the approval of the Engineer 15 and may be made in accordance with this section. 1 16 17 HMA Tolerances and Adjustments I18 19 1. Job Mix Formula Tolerances—The constituents of the mixture at the time of acceptance shall be within tolerance. The tolerance limits will be established as 20 follows: I 21 For Asphalt Binder and Air Voids (Va), the acceptance limits are determined by 22 adding the tolerances below to the approved JMF values. These values will also 23 be the Upper Specification Limit (USL) and Lower Specification Limit (LSL) I 24 required in Section 1-06.2(2)D2 Property Non Statistical Evaluation Commercial Evaluation Asphalt Binder +/ 0.5% +/-0.7% Air Voids,Va 2.5% min. and 5.5% max N/A I 25 For Aggregates in the mixture: 26 a. First, determine preliminary upper and lower acceptance limits by applying the 27 following tolerances to the approved JMF. I Aggregate Percent Passing Non Statistical Commercial Evaluation Evaluation 1",34", 1/2",and 3/8"sieves +/-6% +/-8% No.4 sieve +/-6% +/-8% II No. 8 Sieve +/-6% +/-8% No.200 sieve +/ 2.0% +/-3.0% 28 b. Second, adjust the preliminary upper and lower acceptance limits determined from I 29 step (a) the minimum amount necessary so that none of the aggregate properties 30 are outside the control points in Section 9-03.8(6). The resulting values will be the 31 upper and lower acceptance limits for aggregates, as well as the USL and LSL I 32 required in Section 1-06.2(2)D2. 33 2. Job Mix Formula Adjustments—An adjustment to the aggregate gradation or asphalt 34 binder content of the JMF requires approval of the Engineer. Adjustments to the JMF I 35 will only be considered if the change produces material of equal or better quality and 36 may require the development of a new mix design if the adjustment exceeds the 37 amounts listed below. 38 a. Aggregates—2 percent for the aggregate passing the 1'/2', 1", %" W %", and the 39 No. 4 sieves, 1 percent for aggregate passing the No. 8 sieve, and 0.5 percent for 40 the aggregate passing the No. 200 sieve. The adjusted JMF shall be within the I41 range of the control points in Section 9-03.8(6). I 2020 PAVEMENT MAINTENANCE OVERLAY PAGE 53 OF 79 SPECIAL PROVISIONS WORK ORDER 3727 FEBRUARY 20,2020