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<br />Fulton Street Pedestrian Bicycle Corridor PAGE 78 OF 114 CONTRACT <br />FEDERAL AID # TAP-0420(026) <br />WO #3785 September 6, 2024 <br /> <br />Plants used for the preparation of HMA shall conform to the following requirements: 1 <br /> 2 <br />1. Equipment for Preparation of Asphalt Binder – Tanks for the storage of 3 <br />asphalt binder shall be equipped to heat and hold the material at the required 4 <br />temperatures. The heating shall be accomplished by steam coils, electricity, or 5 <br />other approved means so that no flame shall be in contact with the storage tank. 6 <br />The circulating system for the asphalt binder shall be designed to ensure proper 7 <br />and continuous circulation during the operating period. A valve for the purpose of 8 <br />sampling the asphalt binder shall be placed in either the storage tank or in the 9 <br />supply line to the mixer. 10 <br />2. Thermometric Equipment – An armored thermometer, capable of detecting 11 <br />temperature ranges expected in the HMA mix, shall be fixed in the asphalt binder 12 <br />feed line at a location near the charging valve at the mixer unit. The thermometer 13 <br />location shall be convenient and safe for access by Inspectors. The plant shall 14 <br />also be equipped with an approved dial-scale thermometer, a mercury actuated 15 <br />thermometer, an electric pyrometer, or another approved thermometric 16 <br />instrument placed at the discharge chute of the drier to automatically register or 17 <br />indicate the temperature of the heated aggregates. This device shall be in full 18 <br />view of the plant operator. 19 <br />3. Heating of Asphalt Binder – The temperature of the asphalt binder shall not 20 <br />exceed the maximum recommended by the asphalt binder manufacturer nor shall 21 <br />it be below the minimum temperature required to maintain the asphalt binder in a 22 <br />homogeneous state. The asphalt binder shall be heated in a manner that will 23 <br />avoid local variations in heating. The heating method shall provide a continuous 24 <br />supply of asphalt binder to the mixer at a uniform average temperature with no 25 <br />individual variations exceeding 25°F. Also, when a WMA additive is included in 26 <br />the asphalt binder, the temperature of the asphalt binder shall not exceed the 27 <br />maximum recommended by the manufacturer of the WMA additive. 28 <br />4. Sampling and Testing of Mineral Materials – The HMA plant shall be equipped 29 <br />with a mechanical sampler for the sampling of the mineral materials. The 30 <br />mechanical sampler shall meet the requirements of Section 1 -05.6 for the 31 <br />crushing and screening operation. The Contractor shall provide for the setup and 32 <br />operation of the field testing facilities of the Contracting Agency as provided for in 33 <br />Section 3-01.2(2). 34 <br />5. Sampling HMA – The HMA plant shall provide for sampling HMA by one of the 35 <br />following methods: 36 <br />a. A mechanical sampling device attached to the HMA plant. 37 <br />b. Platforms or devices to enable sampling from the hauling vehicle without 38 <br />entering the hauling vehicle. 39 <br /> 40 <br />5-04.3(3)B Hauling Equipment 41 <br />Trucks used for hauling HMA shall have tight, clean, smooth metal beds and shall have a 42 <br />cover of canvas or other suitable material of sufficient size to protect the mixture from 43 <br />adverse weather. Whenever the weather conditions during the work shift include, or are 44 <br />forecast to include, precipitation or an air temperature less than 45°F or when time from 45 <br />loading to unloading exceeds 30 minutes, the cover shall be securely attached to protect 46 <br />the HMA. 47 <br /> 48