(A) All asphaltic concrete mixtures, other than adjacent to curb and gutter or other true edges, shall be laid by the stringline method to assure the obtaining of an accurate, uniform alignment of the pavement edge. Control the unsupported pavement edge to ensure that it will not deviate more than ± 1.5 inches from the stringline.
(B) The temperature of the mixture at the time of spreading shall be within 25° F. of the temperature set by the engineer, which temperature shall be between 270° F. and 350° F. Any load or portion of a load of asphalt mix on the roadway with a temperature outside of the master range shall be rejected for use on the project. The engineer will be immediately notified of the rejection.
(C) Any mixture caught in transit by a sudden rain may be laid only at the contractor’s risk. Should such mixture prove unsatisfactory, it shall be removed and replaced with satisfactory mixture at the contractors expense. In no case shall the mixture be laid while rain is falling or when there is water on the surface to be covered.
(D) The depth of each layer shall be checked at frequent intervals, not to exceed 25 feet. Any deviation from the required thickness, in excess of the allowable tolerance, shall be immediately corrected. When making an adjustment, allow the paving machine to travel a minimum distance of 32 feet [ten m] to stabilize before the second check is made to determine the effects of the adjustment.
(E) In limited areas where the use of the spreader is impossible or impracticable, the mixture may be spread and finished by hand. Straight-edging and back- patching shall be done after initial compaction has been obtained and while the material is still hot. Upon arrival, the mixture shall be dumped into the approved mechanical spreader and immediately spread and struck-off to the full width required and to such loose depth for each course that, when the work is completed, the specified thickness will be secured. An excess amount of mixture shall be carried ahead of the screed at all times. Hand raking shall be done behind the machine as required.
(F) If necessary due to the traffic requirements, the mixture shall be laid in strips in such manner as to provide for the passage of traffic. Where the road is closed to traffic, the mixture may be laid to the full width, by machines traveling in echelon. Before any rolling is started, the surface shall be checked. Correct any irregularities, remove all drippings, fat sandy accumulations from the screed, and fat spots from any source, shall be removed and replaced with satisfactory material. No skin patching shall be done. When a depression is to be corrected while the mixture is hot, the surface shall be well scarified before the addition of fresh mixture.
(G) Sections denoted in this division refer to sections in the State of FDOT Standard Specifications for Road and Bridge Construction, 2000 Edition.
(1) Preparation of Asphalt Cement shall be in accordance with Section 330-4.
(2) Preparation of Aggregates shall be in accordance with Section 330-5.
(3) Preparation of Mixture shall be in accordance with Section 330-6.
(4) Transportation of the Mixture in accordance with Section 330-7.
(5) The mixture shall be placed in accordance with Section 330-9.
(6) Compacting the Mixture shall be in accordance with Section 330-10.
(H) Monitor the mix spread rate at the beginning of each day's production, and as needed to control the operations, at a minimum of once per 200 tons placed to ensure that the spread rate is within 5% of the target spread rate. When determining the spread rate, use an average of five truckloads of mix.
(I) Joints, transverse and longitudinal, shall be constructed in accordance with Section 330-11.
(J) The provisions of Surface Requirements shall comply with Section 330-12.
(K) Upon completion of the finished pavement, no dumping of any material directly on the pavement will be permitted. Vehicular traffic shall not be permitted on any pavement that has not set sufficiently to prevent rutting or other distortion.
(Ord. 2010-05, passed 4-27-2010) Penalty, see § 10.99