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- 73-3.01C Submittals Submit a 5-year manufacturers replacement warranty against defects in a prefabricated detectable warning surface. 73-3.01D Quality Assurance
- 73-3.01D(3) Quality Control
- 73-3.04 PAYMENT Not Used 73-4 TEXTURED CONCRETE AND COLORED CONCRETE SURFACES 73-4.01 GENERAL
- 73-4.01B Definitions Reserved 73-4.01C Submittals
- 73-4.01D(3) Department Acceptance
73-2.04 PAYMENTNot Used 73-3 SIDEWALKS, GUTTER DEPRESSIONS, ISLAND PAVING, CURB RAMPS, AND DRIVEWAYS 73-3.01 GENERAL73-3.01A SummarySection 73-3 includes specifications for constructing sidewalks, gutter depressionsisland paving, curb ramps, and driveways. 73-3.01B DefinitionsReserved 73-3.01C SubmittalsSubmit a 5-year manufacturer's replacement warranty against defects in a prefabricated detectable warning surface. 73-3.01D Quality Assurance73-3.01D(1) GeneralReserved 73-3.01D(2) WarrantiesThe 5-year manufacturer's replacement warranty for a prefabricated detectable warning surface must cover defects in dome shape, color fastness, sound-on-cane acoustic quality, resilience, and attachment. The 5-year warranty period starts at Contract acceptance. 73-3.01D(3) Quality ControlReserved 73-3.02 MATERIALSNot Used 73-3.03 CONSTRUCTIONConstruct expansion joints at: 1. All returns and opposite expansion joints in the adjacent curb 2. 60-foot intervals where there is no adjacent curb
Install a prefabricated detectable warning surface under the manufacturer’s instructions. Broom finish the surface of sidewalks, gutter depressions, curb ramps, and driveways. Make the broom finish perpendicular to the path of travel on surfaces used by pedestrians. You may apply water to the surface immediately before brooming. The finished surface must not vary more than 0.02 foot from a 10-foot straightedge except at grade changes. If placing pavement around or adjacent to manholes, pipe inlets, or other miscellaneous structures in sidewalk, gutter depression, island paving, curb ramps, or driveway areas, do not finish the miscellaneous structures to final grade until the pavement is finished beyond the miscellaneous structure. If using fixed forms, strike off and compact fresh concrete until a layer of mortar is brought to the surface. Finish the surface with a float to grade and cross section and trowel smooth. Leave forms in place for sidewalks, gutter depressions, island paving, curb ramps, and driveways for at least 12 hours after surface finishing. Clean any discolored concrete by abrasive blast cleaning or other authorized method. 73-3.04 PAYMENTNot Used 73-4 TEXTURED CONCRETE AND COLORED CONCRETE SURFACES 73-4.01 GENERAL73-4.01A SummarySection 73-4 includes specifications for texturing and coloring concrete surfaces. Texture concrete by imprinting with stamps, tools, brooms, or other methods to attain the pattern or impressions shown. 73-4.01B DefinitionsReserved 73-4.01C SubmittalsSubmit the manufacturer's data for the color hardener and curing and finishing compounds for each color of a concrete surface colored by the dry-shake method. 73-4.01D Quality Assurance73-4.01D(1) GeneralReserved 73-4.01D(2) Quality ControlConstruct test panels for textured or colored concrete under section 51-1.01D(2)(c). 73-4.01D(3) Department AcceptanceThe Department accepts textured or colored concrete surfaces based on a visual comparison with the test panel. 73-4.02 MATERIALSAggregate for textured or colored concrete surfaces must comply with the gradation requirements for fine aggregate. Aggregate used in grout for textured and colored concrete surfaces must comply with the gradation requirements shown in the following table:
Color pigments for the dry-shake method must comply with ASTM C979. 73-4.03 CONSTRUCTIONProtect the surrounding exposed surfaces during the placement, finishing, and curing of colored concrete. Screed the concrete to the grade and cross section shown, and strike off and compact the concrete until a layer of mortar is brought to the surface. Wood float the concrete to produce a uniform surface. For the dry-shake method, apply the color hardener in 2 applications while the concrete surface is plastic. Use at least 60 lb of hardener per 100 sq ft of concrete surface. Wood float the surface after each application of hardener. Trowel the surface only after final floating. Texture the concrete while it is in the plastic stage. For a texture that requires a concrete stamp, use the stamp under the manufacturer's instructions. Do not texture or grout the grooved area and detectable warning surface on a curb ramp. Cure the concrete surfaces using the curing compound method with curing compound no. 6. Place any grout after the (1) initial curing of the textured concrete and (2) removal of curing seal and other deleterious substances. The method of removal must not stain or discolor areas of textured concrete to remain exposed after grouting. Spread and consolidate the grout over the textured concrete under the manufacturer's instructions. Remove excess grout with a squeegee and damp burlap rags or other authorized method. Apply curing seal.
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