2017-005B - Laserfiche WebLink

Home Browse Search

i I 1. When construction includes the paving of adjacent shoulders (less than or equal to 5 feet wide), the layer thickness for the upper pavement layer and shoulder shall be the same and paved in a single pass, unless otherwise called for in the Contract Documents. 2. For overbuild layers, use the minimum and maximum layer thicknesses as specified above unless called for differently in the Contract Documents. On variable thickness overbuild layers,the minimum allowable thickness may be reduced by 1/2 inch,and the maximum allowable thickness will be as specified below, unless called for differently in the Contract Documents. Type SP-9.5...........................................3/8 to 2 inches Type SP-12.5.........................................1/2 to 3 inches 3.Variable thickness overbuild layers may be tapered to zero thickness provided the contract documents require a minimum of 1-1/2 inches of mix placed over the variable thickness overbuild layer. 334-1.6 Weight of Mixture: The weight of the mixture shall be determined as provided in 320-3.2 of the FDOT Specifications. 334-2 Materials. 334-2.1 Superpave Asphalt Binder: Unless specified elsewhere in the Contract or in 334-2.3.3, use a PG 67-22 asphalt binder from the FDOT's Approved Products List(APL). If the Contract calls for an alternative asphalt binder, meet the requirements of FDOT Specifications Section 336 or 916, as appropriate. 334-2.2 Aggregate: Use aggregate capable of producing a quality pavement. For Type FC mixes, use an aggregate blend that consists of crushed granite, crushed Ooiitic limestone, other crushed materials(as approved by FDOT forfriction courses per Rule 14-103.005, Florida Administrative Code), or a combination of the above. Crushed limestone from the Oolitic formation may be used if it contains a minimum of 12% silica material as determined by FDOT Test Method FM 5-510 and FDOT grantsapproval of the source prior to its use.As an exception, mixes that contain a minimum of 60%crushed granite may either contain: 1. Up to 40% fine aggregate from other sources; or, 2. A combination of up to 20% RAP and the remaining fine aggregate from other sources. A list of aggregates approved for use in friction courses may be available on the FDOT's State Materials Office website. The URL for obtaining this information, if available, is: ftp://ftp.dot.state.fl.us/fdot/smo/website/sources/frictioncourse.pdf. 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, provided the RAP meets the following requirements: 1. When using a PG 76-22 (PMA), or PG 76-22 (ARB) asphalt binder, limit the amount of RAP material used in the mix to a maximum of 20% by weight of total aggregate. As an exception, amounts greater than 20% RAP by weight of total aggregate can be used if no more than 20% by weight of total asphalt binder comes from the RAP material. 2. Provide stockpiled RAP material that is reasonably consistent in characteristics and contains no aggregate particles which are soft or conglomerates of fines. 3. Provide RAP material having a minimum average asphalt binder content of 4.0% by weight of RAP. As an exception, when using fractionated RAP, the minimum average asphalt binder content for the coarse portion of the RAP shall be 2.5% by i i 01025-36 Technical Specifications F:\Public Works\ENGINEERING DIVISION PROJECTS\1123 43rd Ave Sidewalk Improvements 26th St.to Airport or West\Admim\bid ' documents\Master Contract Documents\Technical Specifications.doc i