SECTION 823 CONCRETE CURING MATERIALS
823.01 GENERAL. This section lists the various types of curing materials allowed for
concrete and the materials requirements applicable to each. The Department will provide specifications governing the particular type or types of curing materials allowed for specific classes of construction in the Contract or other sections of these specifications.
823.02 LIQUID MEMBRANE FORMING COMPOUNDS. Products must have
completed testing through the National Transportation Product Evaluation Program (NTPEP) for Concrete Curing Compounds in or der to remain on or to be placed on the Department’s List of Approved Materials. Ensure that all curing compounds Conform to ASTM C309 and are from a Department approved manufacturer.
1.Type 1-D (Clear with fugitive dye or transl ucent with fugitive dye), Class A or Class B.
2.Type 2 (White pigmented), Class A or Class B. Supply Type 2 curing compounds in agitating type drums, except the Department will not require agitating type containers when Type 2 curing compound is supplied in 5 gallon pails. The Department will accept curing compounds on the basis of certification of their conformance to this section and their being from an approved manufacturer. The Department will reject curing compounds from an unapproved manufacturer and require their removal from the project site.
823.02.01 Acceptance Procedures for Non-Specification Curing Compounds. The
Department may test project samples. When non-specification curing compounds are inadvertently incorporated into the work the Department will accept the material with a reduction in pay. The Department will apply the largest payment reduction when the material fails to meet more than one specification requirement. The Department will calculate the payment reduction on the invoice cost of the material delivered at the project site. MOISTURE LOSS PAYMENT REDUCTION kg/square meter 0.00-0.55 0. 56-0.65 0.66-0.75 0.76 or more Reduction Rate 0% 20% 30% 50% REFLECTANCE PAYMENT REDUCTION % Reflectance 60.0% or more 50-59. 9% 40.0-49.9% 39.9% or less Reduction Rate 0% 20% 30% 50%
823.03 BURLAP CLOTH. Conform to AASHTO M 182, Class 4.
823.04 CURING PAPER (Regular or White). Conform to ASTM C171.
823.05 WHITE POLYETHYLENE FILM (White Opaque). Use white polyethylene
film of either single sheet construction conforming to ASTM C171 or laminated construction consisting of 2 sheets of white polyethylene reinforced with synthetic fiber cords, providing the total thickness of polyethyl ene, exclusive of the cords, averages no less than 4 mils and the sheeting conforms to all other applicable requirements of ASTM C171. 823-1 Incorporate the reinforcing cords diagonally in 2 directions and ensure that the number of cords averages 24 per linear foot in each direction.
823.06 WHITE BURLAP - POLYETHYLENE SHEET. Conform to ASTM C171.
823.07 CURING BLANKETS. Use curing blankets that consist of a top layer of white
copolymer material and a bottom layer of absorbent, non-woven, synthetic fabric. Ensure that the layers are securely bonded together so there will be no separation of the layers during handling and curing of the concrete. When tested according to ASTM C171, ensure that moisture loss does not exceed 0.010grams per square centimeter and that reflectance is at least 70 percent. 823-2 SECTION 824 MASONRY MATERIALS
824.01 Concrete Masonry Units (for Construction of Catch
BASINS AND MANHOLES). Conform to ASTM C 139.
824.02 PRECAST REINFORCED CONCRETE MANHOLE SECTIONS. Conform
to ASTM C 478, KM 64-115 and the Standard Drawings. For flat top slabs, a tongue and groove design is optional. The Department will allow the use of lightweight aggregate provided that it conforms to subsection 805.04.02.
824.03 CONCRETE BUILDING BRICK. Conform to ASTM C 55.
824.04 CONCRETE FACING BRICK. Conform to ASTM C1634.
824.05 SEWER AND MANHOLE LEVELING BRICK. Conform to ASTM C32. The
Department will waive the requirement for saturation coefficient for Grades SM and MS. Ensure that the dimensions are of the specified standard size.
824.05.01 Sewer Brick. Use Grade SS or SM.
824.05.02 Manhole Brick. Use Grade MS or MM.
824.05 FINISHING HYDRATED LIME. Conform to ASTM C 206.
824-1
Source: Kentucky Standard Specifications for Road and Bridge Construction, 2019 Edition. Pages 613–614 of 718.