288-1 Description.
288-1.1 General: Construct Cement Treated Permeable Base and Outlet Pipe as shown
in the Plans and Standard Plans, Index 446-001. Use any one of the types of pipe listed in 288 -2, unless a particular type is specifically required by the Contract Documents. Use only perforated pipe, and do not use open joints.
288-1.2 Concrete Plant and Cement Concrete pavement: Meet the requirements of
Section 346 for plant and equipment, and Section 350 for general construction requirements. Work will be accepted in accordance with the applicable provisions in Section 350.
288-2 Materials.
Meet the following requirements: Coarse Aggregate ................................ ................ Section 901 Portland Cement ................................ .................. Section 921 Water ................................ ................................ ...Section 923 Polyvinyl-Chloride Pipe ................................ ......Section 948 Polyethylene Pipe ................................ ................ Section 948 Geotextile Fabric ................................ ................. Section 985 For Cement Treated Permeable Base, the concrete requirements of Section 346 are modified as follows: Use Type I or II portland cement (no supplementary cementitious materials permitted). Composition: Grade of coarse aggregate (stone) ...................... # 57 or # 67 Maximum Water/Cement ratio* ................................ .....0.40 Minimum cement factor** ................................ ..........9 lb/ft3 Maximum Slump Range ............................... Not Applicable Fine Aggregate ................................ .............................. None Admixtures ................................ ................................ .... None *The Engineer will approve the Water/Cement ratio. **±2 lb/ft3 Do not use materials which contain hardened lumps, crusts, or frozen matter, or are contaminated with dissimilar material.
288-3 Control of Quality.
288-3.1 General: Meet the provisions of this Section and Chapter 9.2 of the Materials
Manual - Concrete Production Facilities Guidelines, which may be view at the following URL: https://www.fdot.gov/programmanagement/Implemented/URLinSp ecs/Section92V2.shtm .
288-3.2 Concrete Design Mix: Submit the proposed design mix prior to production, on
the “Concrete Mix Design” form, for the Engineer’s approval. Use only Cement Treated Permeable Base design mixes having prior approval of the Engineer. Furnish sufficient material of each component when requested by the Engineer, for verification of the proposed mix design by the State Materials Office. Verify the unit weight FY 2023-24 Return to Table of Contents requirements as determined in accordanc e with FM 5-530. Also, submit one of the following with the design mix submittal:
1.Evidence from three sets of production data, either from Department acceptance tests or independently verifiable commercial mixes, that Cement Treated Permeable Base produced in accordance with the proposed design mix meets the requirements of this Section.
2.Test data from a single trial batch of a 1 yd3 minimum is required, which demonstrates that the Cement Treated Permeable Base produced using the proposed mix, designated ingredients, and designated water -cement ratio meets the requirements of this Section.
288-3.3 Batch Adjustment - Materials: Meet the theoretical yield requirements of the
approved mix design. Inform the Engineer of any adjustments to the approv ed mix design. Note any batch adjustments and record the actual quantities incorporated into the mix, on the concrete “Delivery Ticket/Certification” form.
288-3.4 Delivery Certification: Submit to the Engineer a complete “Delivery
Ticket/Certification” f orm with each batch of Cement Treated Permeable Base prior to unloading at the site.
288-4 Acceptance of Placement.
Acceptance of the Contractor’s method of placement and compaction will be based upon the completion of a 500 foot test section, acceptable to the Engineer, prior to further placement. For the purpose of acceptance and partial payment, each day ’s productio n will be divided into LOTs as specified in Section 346 and in accordance with the applicable requirements of Sections 5, 6, and 9.
288-5 Temperature Requirements.
Place Cement Treated Permeable Base only when the atmospheric temperature is above 40°F and rising.
288-6 Construction Requirements.
288-6.1 Placement: Ensure that the structural course on which Cement Treated
Permeable Base is to be placed conforms to the compaction and elevation tolerances specified in the Plans and is free of loose or extran eous material. Fill any area of the structural course which is lower than the grade established by the Plans with structural course material, at no additional cost to the Department. Place and compact Cement Treated Permeable Base in one course (except t he trench which includes the subdrainage pipe), in accordance with these Specifications, lines, grades, dimensions and notes as shown in the Plans. Placement may be accomplished by either the fixed-form or the slip -form method. Place and compact Cement T reated Permeable Base material around the subdrainage pipe for the full width of the trench, in layers not exceeding 8 inches (loose measure). Do not displace or damage the subdrainage pipe or filter fabric. Remove and replace all Cement Treated Permeabl e Base material which is greater than 1/2 inch below the grade shown in the Plans or is not covered with the next layer of material within five calendar days after initial placement or in the opinion of the Engineer is damaged or contaminated, at no additi onal cost to the Department. FY 2023-24 Return to Table of Contents
288-6.2 Compaction: Compact the Cement Treated Permeable Base by one of the
following methods.
1.One complete coverage with a steel -wheeled, two -axle tandem roller weighing between 4 and 10 tons in static mode.
2.By vibr atory plates or screeds. There will be no density requirements for Cement Treated Permeable Base.
288-6.3 Curing: Sprinkle the Cement Treated Permeable Base surface with a fine spray
of water every two hours for a period of eight hours or cover with polyethylene sheets for three or four calendar days. Begin the curing process the morning after placement of the base .
288-6.4 Surface Requirements: Ensure that the finished surface of the Cement Treated
Permeable Base does not vary more than ±1/2 inch from the grade shown in the Plans. The Engineer may approve removal of high spots to within the specified tolerance by a method which does not produce contaminating fines. Remove and replace Cement Treated Permeable Base material that is above tolerance, at no additional cost to the Department. Neither grinding nor milling will be permitted.
288-7 Sampling and Testing.
The Engineer will take random samples of the Cement Treated Permeable Base at the point of placement in accordance with FM 5-530 to determine the unit weight. Cement Treated Permeable Base not within ± 3 lb/ft3of the unit weight of the approved mix design will be rejected. Remove and replace all rejected Cement Treated Permeable Base at no cost to the Department.
288-8 Subdrainage Pipe and Geotextile Material.
Place the subdrainage pipe and geotextile material (filter fabric) in accordance with the Plans and Standard Plans, Index 446-001.
288-9 Outlet Pipe.
Install outlet fittings and pipes concurrent with subdrainage pipe to provide positive gravity drainage and eliminate soil intrusion. The Engineer will restrict installation of additional sections of C ement Treated Permeable Base, until appropriate outlets are installed. Ensure that all fittings and materials are designed and installed to eliminate soil intrusion into the system. Connect the open end of the outlet pipe into either an existing drainage structure, existing ditch pavement or terminate with a concrete apron. Do not block the drainage system at any time. Ensure that at the time of inspection and project acceptance, all outlet pipes and concrete aprons are clear of earth material, vegetatio n, and other debris.
288-10 Method of Measurement.
288-10.1 Cement Treated Permeable Base: The quantity of cement treated permeable
base to be paid for will be the plan quantity, in cubic yards, completed and accepted, subject to
9-3 2.
FY 2023-24 Return to Table of Contents
288-10.2 Outlet P ipe: The quantity of outlet pipe to be paid for will be the length, in
feet, completed and accepted, measured in place along the centerline and gradient of the outlet pipe.
288-11 Basis of Payment.
288-11.1 Cement Treated Permeable Base: Price and payment will be full
compensation for work specified in this Section, including furnishing all labor, materials (including the cement treated permeable base material, geotextile, and subdrainage pipe), tools, equipment, and incidentals, necessary to complete the work.
288-11.2 Outlet Pipe: Price and payment will be full compensation for work specified in
this Section, including removal of existing shoulder pavement, trench excavation, pipe and fittings, standard aprons, galvanized hardware cloth (rodent screens), grouting around and stubbing into existing or proposed inlets and drainage structures or paved ditches; restoration of ditch pavement and other areas disturbed by the Contractor, backfill in place, and disposal of excess materials and incidentals, necessa ry to complete the work. Payment will be made under: Item No. 288 - 1- Cement Treated Permeable Base - per cubic yard. Item No. 446 - 71- 1 Edgedrain Outlet Pipe - per foot. FY 2023-24 Return to Table of Contents SECTION 290 GRANULAR SUBBASE
290-1 Description.
Construct a granular subbase as a component of an optional base.
290-2 Materials.
Select one of the materials listed below and conform to the following requirements: Graded Aggregate ................................ ........................ 204-2 Limerock ................................ ............................. Section 911 Bank Run Shell ................................ ................... Section 91 1 Shell Rock ................................ ........................... Section 91 1 Cemented Coquina ................................ ..............Section 91 1 Recycled Concrete Aggregate (RCA)* ..............Section 911 *Do not use on interstate roadways.
290-3 Construction Methods.
For the subbase material selected, construct the sub base in conformance with the following: Graded Aggregate ................................ ............... Section 204 Limerock ................................ ............................. Section 200 Bank Run Shell ................................ ................... Section 200 Shell Rock ................................ ........................... Section 200 Cemented Coquina ................................ ..............Section 200 Recycled Concrete Aggregate (RCA)* ..............Section 200 *Do not use on interstate roadways. Straightedge and hard -planing provisions will not apply. Compact the subbase to a minimum of 98% of the maximum density as determined under FM 1-T180, Method D. Priming is not required. When Granular Subbase is substituted for Subgrade on shoulders, achieve a minimum of 95% density of the maximum density as determined under FM 1-T180, Method D.
290-4 Thickness Requirements.
290-4.1 General: Do not substitute granular subbase materials in excess of the tolerance
specified for the asphalt portion of the optional base.
290-4.2 Measurements: When the Department is ready to measure the finished subbase,
provide the coring equipment and the operat or and include this in the unit price for optional base. The Engineer will select the coring locations and make the acceptance measurements. Thickness measurements will be taken through 3 inch diameter holes. For subbase areas greater than 1,000 yd2, the minimum frequency of measurement will be one per 200 feet of roadway. For smaller subbase areas, the minimum frequency of measurement will be one per 500 yd2 of subbase.
290-4.3 Maximum Allowable Thickness: The maximum allowable thickness of the
subbase is 4 1/4 inches. Remove and replace areas of subbase exceeding the maximum allowable thickness.
290-4.4 Minimum Allowable Thickness: The minimum allowable thickness of the
subbase is 3 -1/2 inches. Remove and replace areas not meeting the minimum allowable FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 260–263 of 1,299.