CRACKING AND RESEATING EXISTING CONCRETE PAVEMENT
175-1 Description.
Perform controlled cracking of concrete pavement and reseating of the cracked slabs, by rolling, tamping, etc., on the underlying subgrade to provide a firm base for asphalt concrete surfacing.
175-2 Equipment.
175-2.1 For Cracking: Provide pneumatic or gravity -type breakers, or other specifically
approved equipment that ensures controlled cracking to the size and extent of uniformity, etc., specified. C ontrol the fall of gravity -type breakers by leads so that the fall will be straight and vertical. Use hammers for both pneumatic and gravity -type breakers of a type that will crack the concrete cleanly and not punch or unnecessarily shatter the concrete.
175-2.2 For Reseating Provide vibratory compacting equipment or traffic rollers. Use
traffic rollers that weigh at least 15 tons.
175-3 Construction Requirements.
175-3.1 Protection of New Construction and Adjacent Structures: Perform cracking
and reseati ng work prior to beginning all new construction which this work might endanger or disturb. Perform cracking and reseating in a manner that will not damage any existing structures which are to remain, and repair any damage to such structures that this work causes by this work at no expense to the Department.
175-3.2 Cracking and Seating: For the cracked slabs, make clean fractures, as near
vertical as practicable. Do not punch the pieces into the subgrade, but firmly seat them thereon, to as uniform a conto ur as is practicable.
175-3.3 Special Requirements for Asphalt -Surfaced Pavement: Where the existing
concrete pavement is covered with an asphalt surface, remove the asphalt surfacing (after the cracking operation) on test areas approximately 10 by 10 feet, at locations selected by the Engineer, in order to determine if the required results are being obtained in the cracking operations. Prepare at least one such test area for each day's operation, and prepare additional areas if deemed necessary by the Eng ineer.
175-3.4 Dimensions of Slabs: Ensure that the cracked slabs have no dimension greater
than 3 feet. In the event that the required results in the cracking are not being obtained, adjust the spacing of blows or the height of drop of the blows as neces sary to obtain the required results with the equipment being used.
175-4 Method of Measurement.
The quantity to be paid for will be the plan quantity, in square yards, of existing concrete pavement acceptably cracked and reseated on the subgrade.
175-5 Basis of Payment.
Price and payment will be full compensation for performing and completing all work specified in this Section. Payment will be made under: Item No. 175 - 1- Reseating Concrete Pavement - per square yard. FY 2023-24 Return to Table of Contents BASE COURSES SECTION 200 ROCK BASE
200-1 Description.
Construct a base composed of base rock. Do not use recycled concrete aggregate (RCA) base on interstate roadways .
200-2 Materials.
200-2.1 General: Meet the requirements of Section 911for the particular type of base to
be constructed. The Contractor may use more than one source of base rock on a single Contract provided that a single source is used throughout the entire width and depth of a section of base. Obtain approval from the Engineer before placing material from more than one source. Place material to ensure total thickness single source integrity at any station location of the base. Intermittent placement or “blending” of sources is not permitt ed. Base rock may be referred to hereinafter as “rock”. The reuse of existing base may be considered provided it meets the requirements of this Section. Submit as a Cost Savings Initiative Proposal in accordance with Section 4.
200-2.2 Existing Rock: Meet the following requirements for use of existing rock on the
same project:
1.Notify the Engineer in writing prior to excavating existing rock. Do not mill any existing rock from the roadway.
2.Submit a process control plan, herein referred to as “Pl an” consisting of the following:
a.Locations where existing rock will be removed from the roadway.
b.Locations where existing rock will be used for new construction.
c.Method of excavation, transport , and placement to ensure excavated rock will be kept separate from other approved stockpiles. Excavation methods that may result in damage to the rock rendering it unfit to be used as base will not be approved.
d.Proposed measures to prevent contamination and segregation.
e.Proposed locations and methods for constructing stockpiles for sampling and testing.
f.Method for sampling and reporting test results.
3.The Engineer will coordinate the review of the “Plan” with the District Materials Office.
4.Upon the Engineer’s review of the “Plan”, build a preliminary stockpile, not to exceed 1,000 cubic yards.
5.Collect and test a minimum of three samples from the preliminary stockpile. Once the stockpile has been sampled, do not add any additional material to the stockpile. Determine compliance with 200 -2.1, with the exception of carbonate contents. Reject any stockpile if the Limerock Bearing Ratio (LBR) is less than 100. Engineer will sample and test the preliminary stockpile to verify compliance with this Section.
6.If all test results meet the requirements of this Section, the Engineer will notify the Contractor in writing of the approved status of the preliminary stockpile based on the analysis of test data performed by the District Materials Office. FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 226–226 of 1,299.