925-1 Burlap.
Burlap for curing concrete shall consist either of two layers, each weighing 10 to 18 ounces/10 square feet, or of four layers, each weighing 6 to 7 ounces/10 square feet. Burlap which has been used as a container for sugar shall not be used. Burlap that i s being used for the first time shall be thoroughly washed in order to remove starches used in sizing the material. Burlap shall be furnished in strips of at least 3 feet wide and shall be at least 3 feet longer than the width of surface to be covered.
925-2 Membrane -Forming Curing Compound.
925-2.1 General : Membrane -forming curing compound shall conform to requirements of
ASTM C309 and the following requirements: Table 925-1 Requirement Test Method Test Value Water Loss@72 hours ASTM C156 0.55 kg/m2 Deleterious Reaction with Concrete ASTM C309 None Reflectance ASTM E1347 60% minimum* Drying Time ASTM C309 4 hours maximum Non-Volatile Content ASTM D1644 (Method A) (informational) Density, lbs/gal ASTM D1475 (informational) *Type 2 (White) compounds only. The membrane -forming curing compound shall be of a consistency suitable for spraying at temperatures prevalent at the time of application, and which forms a continuous, uniform film. It shall be free from precipitated matter caused by conditions of storage or temperature. Thoroughly agitate the curing compound in accordance with the manufacturer’s recommendations prior to shipment from manufacturer’s plant and prior to use at job site. Curing compound delivered to the job site shall be in the manufacturer’ s original container and clearly labeled with the following information:
1.manufacturer’s name
2.product name (trade name)
3.type
4.batch or LOT number
5.date of manufacture
925-2.2 Product Acceptance: Acceptance of membrane -forming curing compound shall
be based on the product being listed on the Department ’s Approved Product List ( APL).
925-2.2 1 Approved Product List: Manufacturers seeking evaluation of their
product must submit an application in accordance with Section 6 and include product data sheets, material safety data sheets (SDS) and certified test reports from an independent laboratory showing the product meets the requirements of this Section. Testing in accordance with the FY 2023-24 Return to Table of Contents National Transportation Produc t Evaluation Program (NTPEP) Project Work Plan for the Laboratory Testing of Liquid Membrane -Forming Compounds for Curing Concrete shall be acceptable as independent laboratory data . Include an Infrared Spectrophotometry (IR) Scan and a certification stati ng the nominal minimum percentage of non -volatile material for the product formulation. Deviation of the non -volatile material below this certified value shall be considered a change in formulation and shall be grounds for removal from the APL.
925-2.2 2 Certification: Prior to use, the Contractor shall submit to the Engineer
a certification from the manufacturer conforming to the requirements of Section 6 that the requirements of this Section are met.
925-2.3 Product Life : Store the curing compound in accordance with the manufacturer’s
recommendations. Curing c ompound s not used within one year of the date of manufacture shall not be incorporated into the work.
925-3 Sheet Materials .
925-3.1 General : Waterproof paper, polyethylene film and w hite burlap -polyethylene
sheet, for curing concrete shall meet the requirements of ASTM C171, with the additional requirements for waterproof paper and for polyethylene film as shown below.
925-3.2 Additional Requirements for Waterproof Paper : The paper a s prepared for
use shall be in such dimensions that each unit as laid will extend at least 18 inches beyond the edges of the slab. If laid longitudinally, paper not manufactured in sizes which will provide this width shall be securely sewed or cemented tog ether; the joints being sealed in such manner that they do not open up or separate during the curing period. At the option of the Contractor, instead of the single longitudinal strip specified above, the blanket may be furnished in three strips; one stri p being the neat width of the pavement, with two side strips.
925-3.3 Additional Requirements for Polyethylene Sheeting : The sheets, as prepared
for use, shall be of such dimensions that each unit as laid will extend beyond the edges of the slab by at least twice the thickness dimension of the pavement edge, and the sheets shall overlap by at least 18 inches. No sheet may be reused except after individual inspection and approval by the Engineer. Any sheets determined by the Engineer to be so damaged as to not afford the protection to the concrete in preventing moisture loss during the curing period will be rejected.
925-4 Certification.
For burlap or white burlap -polyethylene, the Contractor shall submit to the Engineer a certification conforming to the requirements of Section 6 from the manufacturer confirming that the requirements of this Section are met. Each certificat ion shall cover only one type of burlap or white burlap -polyethylene sheeting. FY 2023-24 Return to Table of Contents SECTION 926 EPOXY COMPOUNDS
926-1 Types of Compounds.
Epoxy resin-based compounds for application to portland cement concrete, bituminous cement concrete, metals and other type surfaces shall be applicable for the following types as designated. Products may only be used for applications recommended by the manufacturer. Table 926-1 Type Description AB* An epoxy resin, for bonding fresh or hardened concrete to hardened concrete and constructing doweled splices in precast prestressed concrete piles. E* A fluid epoxy for crack injection in the repair of old structures. F F-1* F-2** An epoxy for repairing spalled areas on concrete bridge structures with these subtypes: A non-sagging gel type for vertical surfaces. A pourable type for repairs where forms are to be used. H** An epoxy for structural bonding w here asphalt overlays are to be in contact with the hardened compound. K* An epoxy for underwater sealing of the bottom of the jacket of an integral pile jacket system. M*** A coal tar epoxy coating for steel sheet piles and H piles (water immersion) and hot applied coal tar epoxy tape. PSE* A two-part epoxy system to match the cast faces of joints between precast segmental concrete superstructure and/or substructure segments. Q* An epoxy for use in post tensioning anchorage protection sys tems. *Accepted by APL **Accepted by certified test report ***Accepted by certification
926-2 Epoxy Design Requirements.
926-2.1 General: All types of compounds, except for Type M, shall be thermosetting
containing no volatile solvent, and be pure reactive material. All types of compounds except for Type M shall have simple mix ratios of one to one, two to one, or shall be supplied in pre - proportioned containers in which all the contents are to be mixed. All types of compounds shall be labeled with the manufacturer’s name, brand name, component type (resin, hardener or filler), mix ratio, mixing directions, date manufactured, shelf life, a nd the manufacturer’s LOT number. Potential hazards shall be stated on each package in accordance with the Federal Hazardous Products Labeling Act . Certain terms used in this specification shall have these meanings: low modulus - the stress-strain pro perty for which ultimate tensile strength is attained at over 10% elongation. high modulus - the stress-strain property for which ultimate tensile strength is attained at under 6% elongation. non-sagging gel - grades of mixed compounds which will not perceptibly flow under their own weight on a vertical surface in the unhardened state. pourable - grades of mixed compound sufficiently fluid that they (either neat or filled) can be cast into and will take the shape of a mold. FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 1015–1016 of 1,299.