Specifications - Laserfiche WebLink

Home Browse Search

I I I I I I I I I I I I I I I I I I I be reduced by 1/2 inch [13 mml, and the maximum allowable thickness may be increased 1/2 inch [13 mml, unless called for differently in the Contract documents. 334-2 Materials. 334-2.1 General Requirements: Meet the material requirements specified in Division III. Specific references are as follows: Superpave PG Asphalt Binder or Recycling Agent 916-1, 916-2 Coarse Aggregate............................................. Section 901 Fine Aggregate................................................. Section 902 334-2.2 Superpave Asphalt Binder: Unless specified otherwise in the Contract, use a PG 67-22 asphalt binder with the following exceptions: for Traffic Level D, use a PG 76-22 asphalt binder in the final structural layer; for Traffic Level E, use a PG 76-22 asphalt binder in the top two structural layers. In addition, meet the requirements of 334-2.3. 334-2.3 Reclaimed Asphalt Pavement (RAP) Material: 334-2.3.1 General requirements: RAP may be used as a component of the asphalt mixture subject to the following requirements: 1. For Traffic Levels A, Band C mixtures, limit the amount of RAP material used in the mix to a maximum of 50 percent by weight of total aggregate. For Traffic Levels D and E mixtures, limit the amount of RAP material used in the mix to a maximum of 30 percent by weight of total aggregate. 2. When using a PG 76-22 Asphalt Binder, limit the amount of RAP material used in the mix to a maximum of 15 percent by weight of total aggregate. 3. Assume full responsibility for the design, production and construction of asphalt mixes which incorporate RAP as a component material. 4. Use RAP from an FDOT approved stockpile or RAP that has an FDOT furnished Pavement Composition Data Sheet. 5. Do not use RAP material in any friction course mixes. 6. Provide stockpiled RAP material that is reasonably consistent in characteristics and contains no aggregate particles which are soft or conglomerates of fines. 7. Provide RAP material having a minimum average asphalt content of 4.0 percent by weight of total mix. The Engineer may sample the stockpile to verify that this requirement is met. 334-2.3.2 Material Characterization: Assume responsibility for establishing the asphalt binder content, gradation, viscosity and bulk specific gravity (Gsb) of the RAP material based on a representative sampling of the material. Obtain the samples by one of the following methods: 1. Roadway cores: Cut a minimum number of cores to be representative of the pavement prior to milling. Fill the core holes prior to opening to traffic. Assume responsibility for accounting for the degradation that will occur during the milling operation. 2. Milling: Obtain representative samples by milling the existing pavement to the full depth shown on the plans for a minimum length of approximately 200 feet [60 m]. If required to maintain traffic, immediately replace the pavement removed with the mix specified in the Contract. This mix will be paid for at the Contract unit price. 3. Stockpile sampling: Obtain samples from a stockpile of either milled or processed RAP. Take representative samples at random locations around the March 2007 01000-54 03-4122.0