8−117spray equipment shall be capable of automatically shutting down if the mixing ratio cannot be maintained with the tolerance specified.
7.Coverage shall be applied at both the rate and the number of coats as recommended by the manufacturer of the selected product.
8.The applicator shall be experienced and qualified by the manufacturer in the proper application procedure for the concrete sealer. Docu mentation attesting to this shall be provided for the Engineer’s review and approval prior to the start of any work. A manufacturer’s representative may be required to be present during all or part of the work at the discretion of the Engineer, at no additional cost to the State.
9.The operation may commence or proceed only with the approval of the Engineer.
820.04 METHOD OF MEASUREMENT. "Concrete Surface Treatment Protective Sealer" will be
measured by the number of square feet of concrete surface actually coated in accordance with the Plans and/or as directed by the Engineer. 820.05 BASIS OF PAYMENT. The accepted quantity of "Concrete Surface Treatment Protective Sealer" will be paid for at the contract unit price per square foot as listed in the Proposal. The price stated shall constitute full and complete compensation for all labor, materials, equipment, and all incidentals required to complete the work as described in this Specification and elsewhere in the Contract Documents, complete in place and accepted by the Engineer. IN BITUMINOUS CONCRETE PAVEMENTS
821.01 DESCRIPTION. This work consists of making two saw cuts, one within the other, in the
finished bituminous concrete pavement directly over the transverse joints and edge of deck, and filling the cuts with a hot poured asphalt rubber compound at the locations indicated on the Plans, or as directed by the Engineer, all in accordance with these Specifications. 821.02 MATERIALS. Poured joint seal material shall be an asphalt rubber compound of the hot poured type conforming to AASHTO M301 and approved by the Engineer. 821.03 CONSTRUCTION METHODS. The intent of the work under this provision is to establish a weakened plane joint to control reflectance cracking in the newly installed bituminous concrete pavement at the piers and abutments. The cuts shall be made directly over the transverse joints at the piers and the edge of deck 8−118 at the abutments. After the cuts have been satisfactorily completed they shall be sealed with the hot asphalt rubber joint sealer. 821.03.1 Sawing Joints. The bituminous concrete shall have aged sufficiently to allow clean cuts to be made and to withstand the eroding effects of the saw or other cutting device. The saw cutting of the joint shall be made with an approved power-driven saw. The initial saw cut shall be 3/8-inch wide by ½-inch deep. The second saw cut, 1/8-inch wide and 1 inch deep, shall be made within the initial saw cut and shall be, as nearly as practical, centered on the initial saw cut. The saw cuts shall be made with an abrasive blade and sawn dry. The completed cuts shall extend in a straight line across the pavement from curb to curb. Each joint to be sawed will be referenced by the Contractor. It shall be the responsibility of the Contractor to ensure that the saw cuts are constructed directly over the deck joints at the piers and the edge of deck at the abutments. 821.03.2 Sealing Joints. The sawed joints shall be sealed immediately after the second saw cut has been made. Traffic shall not be allowed to knead together or damage the sawed joint. Each joint shall be thoroughly cleaned and dried prior to placement of the sealing compound. Any cleaning required shall be performed by blowing out all dirt, dust, or deleterious matter that may have accumulated in the sawed joints. Sufficient air pressure shall be provided to insure thorough cleaning. A combined melter and pressure application shall be used. The melter shall be either oil or gas-fired, and shall be of the double walled, oil bath type with a power-driven mechanical agitator and circulating pump. It shall be equipped with a thermostat to maintain the sealing compound within the range of temperatures specified by the manufacturer and with a suitably mounted thermometer to indicate the temperature of the sealing compound in the melter. The joint seal shall be applied with a mobile carriage and rubber shoe, and the system shall have a flow control valve which allows all cracks to be filled to refusal so as to eliminate all voids or entrapped air and not leave unnecessary surplus cra ck sealer on the pavement surface. The hot seal shall completely fill the joint, such that, after cooling, the level of the sealer will not be greater than 1/8-inch below the pavement surface. Any depression in the seal greater than 3/16-inch shall be brought up to the specified limit by the further addition of hot seal. Care shall be taken in the sealing of the joints so that the final appearance will present a neat fine line. Overfilling of joints will not be allowed, and spillage of the sealer shall be avoided. All workmanship shall be of the highest quality, and all excess or spilled sealer shall be removed from the pavement by approved methods and discarded. The melting temperature of the sealer will be furnished by the manufacturer, and the actual temperature of the material in the melter shall not exceed the melting temperature by more than 15 OF.
821.04 METHOD OF MEASUREMENT. "Sawing and Sealing Joints in Bituminous Concrete
Pavement" will be measured by the number of linear feet actually sawed and sealed in accordance with the Plans and/or as directed by the Engineer. 8−119821.05 BASIS OF PAYMENT. The accepted quantity of "Sawing and Sealing Joints in Bituminous Concrete Pavement" will be paid for at the contract unit price per linear foot as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, tools, materials, equipment, and incidentals required to finish the work complete and accepted by the Engineer. SECTION 822 SILICONE HIGHWAY JOINT SEAL
822.01 DESCRIPTION. This work consists of providing silicone joint sealant in highway and bridge
expansion and contraction joints at the locations indicated on the Plans, or as directed by the Engineer, all in accordance with these Specifications. 822.02 MATERIALS. The silicone joint sealant shall be a one-part silicone material that readily extrudes over a wide temperature range and cures to produce a durable, flexible, low modulus, silicone rubber seal. The material shall have an extension recovery of 100 percent and a compression recovery of 50 percent of the original joint width. The silicone sealant shall conform to the requirements of Federal Specifications TT-S-01543 A Class A (one-part silicone sealants) and TT-S-00230 C Class A (one component sealants). 822.03 CONSTRUCTION METHODS. All joints shall be cleaned of contaminants and impurities to the depth at which the sealant (and backer rod if detailed) is to be installed. Cleaning shall be by grinding, saw cutting, blast cleaning (sand or water), mechanical abrading or a combination of these methods. This will provide a sound, clean and frost-free surface for sealant application. All dust, loose particles and other debris shall be blown out with oil free compressed air. An expanded closed cell polyethylene foam rod back-up material shall be installed in joints, or an approved bond breaker tape shall be installed if so detailed on the Plans. A primer shall be applied to the surfaces of steel expansion joints. The primer shall be as per the recommendation of the sealant manufacturer. Silicone highway joint sealant shall be applied in a continuous operation to properly fill and seal the joint width. It shall be applied not thicker than ½-inch and no thinner than 1/4-inch with an approximate width to depth ratio of 2-to-1. For maximum performance, the sealant should be applied above 40 OF. The sealant shall be pumped directly from the original drum or pail in to the joint by use of an air powered pump, pushing the sealant ahead to form a uniform bead. The sealant shall fill the joint from the bottom to slightly
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 451–453 of 826.