252 with burlap or cotton mats, it may be applied upon removal of the mats. The curing compound shall not be applied during rainfall. Curing compound shall be applied under pressure by mechanical sprayers. The spraying equipment shall be of the fully atomizing type equipped with a tank agi tator. The rate of application of the curing compound shall be as follows:
1.Pavement with Burlap Drag Finish -One Gallon Per Maximum of 150 sq. ft.
2.Pavement Requiring Groove Finish -One Gallon Per Maximum of 125 sq. ft. For unbonded concrete overlays, th e curing compound application rates noted below shall be doubled. At the time of use, the compound shall be in a thoroughly mixed condition with the pigment uniformly dispersed throughout the vehicle. During application the compound shall be continuousl y agitated. Hand spraying of odd widths or shapes and surfaces exposed by removal of forms will be permitted. Curing compound shall not be applied to the inside faces of joints to be sealed. Should the film become damaged from any cause within the requ ired curing period (72 hours after placement of concrete, unless otherwise specified), the damaged portions shall be immediately repaired with additional compound. Upon removal of the side forms, the sides of the exposed slabs shall be protected immediat ely with a curing treatment equal to that provided for the surface.
501.14.5 White Polyethylene Sheeting or Polyethylene Coated Burlap: The top surface
and sides of the pavement shall be entirely covered with polyethylene sheeting or polyethylene coated burlap. Units shall be lapped at least eighteen ( 18) inches. The covering shall be weighed down so as to remain in intimate contact wi th the surface covered. The covering shall extend at least twice the thickness of the pavement beyond the edges of the slab. The covering shall be maintained in place at least 72 hours after the concrete is placed, unless otherwise specified.
501.15 Removing Forms :
Forms shall not be removed until at least 12 hours after placement of the concrete. Forms shall be removed carefully so as to avoid damage to the slab. As soon as the side forms have been removed, minor honeycombed areas shall be filled with mortar composed of one part cement to two parts fine sand and cured as outlined in one of the methods indicated above. Major honeycombed areas shall be removed and replaced. All areas or sections so removed shall be not less than ten ( 10) feet in length nor less than the full width of the traffic lane involved. Any remaining portion of the slab adjacent to the joints that is less than ten (10) feet in length shall also be removed and replaced. Slabs shall be cut by sawing full depth for removal.
501.16 Sealing Joints :
All transverse contraction and construction joints to be sealed shall have the preformed elastomeric seal installed or shall be filled with silicone sealer before the pavement is opened to traffic, including construction traffic, and as soon after completion of curing as is feasible. All longitudinal joints shall be sealed with silicone seala nt. Cleaning and sealing of all joints is not required unless shown in the Plans.
501.16.1 Silicone Sealant: Following forming, initial sawing and final or second -step
sawing operations, the joints shall have been cleaned in accordance with subsectio na 501.11.8. In preparation for sealing, all joints that have become contaminated since those forming or
Source: West Virginia Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 270–270 of 1,006.