MasterFormat: 95

Download this Specification for   WORD | WP | RTF | TEXT

Find over 500 more construction specifications | Arcat.com

	SECTION 03920
	CONCRETE RESURFACERS
	Copyright 2011 ARCAT, Inc. - All rights reserved
	** NOTE TO SPECIFIER ** ProSpec (formerly Bonsal) manufacturers of surface preparation products, setting materials, colored tile grouts and tile and stone care and maintenance products. This section is based on the products of Bonsal / ProSpec, which is located at: 8201 Arrowridge Blvd. Charlotte, NC 28273 Toll Free: (800)738-1621 Phone: (704)525-1621 Fax: (704)529-5261 E-mail: Send message to ProSpec (formerly Bonsal) [ Click Here ] for additional [ Product Data ]. Bonsal American, one of the most trusted manufacturers in concrete and flooring products for both commercial and residential construction, is proud to announce the next evolution in the industry ProSpec, a Sakrete brand. Bonsal American / Oldcastle acquired the Sakrete brand in 2006. Building on the strength of the Sakrete brand, all products are being transitioned under the Sakrete umbrella. ProSpec is the professionally-specified group of products formerly packaged under the Bonsal brand, which included Concrete Restoration and Repair and Tile Installation products. ProSpec is built on the core values that you have come to know and trust with the Bonsal brand. The only difference you'll see is how much easier it is to get the products you need from one source, because the entire ProSpec and Sakrete lines are one simple call away. With ProSpec, you'll get the same level of quality and performance you expect from American products.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
		A.	Cementitious resurfacers and crack repair.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 03300 - Cast-In-Place Concrete.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
		A.	ACI 201.1R Guide for Making a Conditions Survey of Concrete in Service.
		B.	ACI 224.1R93 Causes and Repair of Cracks in Concrete Structure.
		C.	ASTM C 109 - Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-inch (50-mm) Cube Specimens).
		D.	ASTM C 157 - Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete
		E.	ASTM C 191 - Standard Test Method for Time of Setting of Hydraulic Cement by Vicat Needle.
		F.	ASTM C 348 - Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars.
		G.	ASTM C 666 - Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing
		H.	ASTM C 882 - Standard Test Method for Bond Strength of Epoxy-Resin Systems Used With Concrete By Slant Shear
		I.	ASTM C 928 - Standard Specification for Packaged, Dry, Rapid-Hardening Cementitious Materials for Concrete Repairs
		J.	ICRI 03732 - Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, and Polymer Overlays.
		K.	RFCI (Resilient Floor Covering Institute) MRP - Addressing Moisture Related Problems Relevant to Resilient Floor Coverings Installed Over Concrete.
		L.	NOFMA (National Oak Flooring Institute) - Installing Hardwood Flooring.
		M.	TCA (Tile Council of North America) - Handbook for Ceramic Tile Installation.
	1.4	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Manufacturer's data sheets on each product to be used, including:
			1.	Preparation instructions and recommendations.
			2.	Storage and handling requirements and recommendations.
			3.	Manufacturer's printed installation instructions for each product.
	1.5	QUALITY ASSURANCE
		A.	Manufacturer Qualifications: Firm specializing in manufacture of cementitious concrete resurfacers and restoration products, with minimum 10 years experience.
		B.	Installer Qualifications: Firm specializing in installation of cementitious repair products, with minimum 5 years documented experience with projects of similar scope, design, and materials.
		C.	Mock-Up: Provide a mock-up of each type of installation for approval of quality of workmanship.
		D.	Pre-Installation Meeting: At least three weeks prior to commencing Work conduct a meeting at the project site to discuss contract requirements and job conditions; require the attendance of installers, representative of installation materials manufacturer, and installers of related materials; notify Architect in advance of meeting.
	1.6	DELIVERY, STORAGE, AND HANDLING
		A.	Deliver and store packaged materials in original containers with seals unbroken and labels intact until time of use. Prevent damage or contamination to materials by water, freezing, foreign matter or other causes.
		B.	Store materials subject to damage by freezing or overheating.
		C.	Deliver and store materials on site at least 24 hours before work begins.
	1.7	PROJECT CONDITIONS
		A.	Maintain environmental conditions and protect work during and after installation to comply with referenced standards and manufacturer's printed recommendations.
		B.	Proceed with Work after surface defects have been repaired and projections through substrate have been completed.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: ProSpec (formerly Bonsal branded products), which is located at: Bonsal American 8227-C Arrowridge Blvd. ; Charlotte, NC 28273; Toll Free Tel: 800-738-1621; Tel: 704-525-1621; Email: request info; Web: www.prospec.com
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted.
		C.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
		D.	Obtain products from a single manufacturer.
	2.2	CONCRETE RESURFACERS
	** NOTE TO SPECIFIER ** ProSpec® CR is a polymer-modified, cement-based concrete resurfacing and rehabilitation product used for making old concrete look new again. Delete if not required.
		A.	Product: CR - Concrete Resurfacer as manufactured by Bonsal / ProSpec.
			1.	Application: Commercial and residential applications; Walkways; Concrete stairs; Garage floors, Pool decks; Patios; Driveways. Maximum 1/2 inch (13 mm) application thickness.
			2.	Working Time at 70 degrees F (21 degrees C): 20 to 30 minutes.
			3.	Set Time - ASTM C 191 at 70 degrees F (21 degrees C): Initial set 60 to 90 minutes, final set 90 to 120 minutes.
			4.	Compressive Strength ASTM C 109: 3 hours - 1500 psi (10.3 MPa), 1 day - 2400 psi (16.5 MPa), 7 days - 3,600 psi (24.7 MPa), 28 days - 5000 psi (34.5 MPa).
			5.	Flexural Strength ASTM C 348: 28 days - 1000 psi (6.9 MPa).
			6.	Length Change ASTM C 157:
				a.	: 1 day - 0.004 percent, 7 days - 0.000 percent, 28 days - minus 0.014 percent.
				b.	: 1 day - 0.007 percent, 7 days - 0.010 percent, 28 days - 0.031 percent.
	** NOTE TO SPECIFIER ** ProSpec® Floor Patch is a rapid-setting, polymer modified, unsanded Portland cement based patching and embossing leveler compound used under a wide variety of floor covering installations. Use under: Resilient flooring; Ceramic and vinyl tile; Wood flooring. Use over: Concrete; Plywood (interior only); Properly prepared cutback adhesive; Cement backerboard; Cementitious terrazzo; Embossed vinyl. Delete if not required.
		B.	Product: ProSpec Floor Patch as manufactured by Bonsal / ProSpec:
			1.	Application: Featheredge to 2 inches (51 mm) in thickness. Consult Data Sheet for appropriate substrates and coverings.
			2.	Set Time - ASTM C 191 at 70 degrees F (21 degrees C): Initial set 20 to 30 minutes, final set 40 to 50 minutes.
			3.	Hardness (Durometer - Shore D): 76D.
			4.	Compressive Strength ASTM C 109: 2 hours - >600 psi (4.1 MPa), 4 hours - >800 psi (5.5 MPa), 1 day - >1,300 psi (9.0 MPa), 7 days - >1900 psi (13.1 MPa), 28 days - >2650 psi (18.3 MPa).
			5.	Tensile Strength: 7 days - 260 psi (1.8 MPa).
			6.	Flexural Strength: 7 days - 700 psi (4.8 MPa).
			7.	Linear Length Change: 24 hour - minus 0.0017, 7 day - minus .006
			8.	Tensile Adhesion (25 mil/24 hr):
				a.	Plywood: >37 psi (0.3 MPa).
				b.	OSB-chip board: >22 psi (0.2 MPa).
				c.	Concrete: >260 psi (1.8 MPa) substrate failure mode.
				d.	Vinyl: >16 psi (0.1 MPa).
				e.	Vinyl with 118 Primer: >29 psi (0.2 MPa).
			9.	Mosaic Shear Bond: 7 day - >350 psi (2.4 MPa), 7 day/7 day immersed water - >145 psi (1.0 MPa).
	** NOTE TO SPECIFIER ** ProSpec® Feather Edge is a trowelable, rapid-setting underlayment that results in a very smooth, ultra-thin finish applied over a wide array of subfloors. Feather Edge Applications: Flash patching and skim coating; Quick installation of floor covering; Smoothing cracks, gouges, dings and ridges; Repairs nearly all types of interior subflooring such as concrete, wood terrazzo and ceramic tile. Feather Edge can be installed over thin sound, bonded non-water soluble adhesives that are firmly secured to the substrate. The adhesive (cutback) needs to be a thin film that is prepared using the wet scraping method as outlined by the Resilient Floor Covering Institute booklet "Recommended Work Practices for the Removal of Resilient Floor Coverings". Delete if not required.
		C.	Product: Feather Edge as manufactured by Bonsal / ProSpec.
			1.	Application: Feather Edge can be applied from feather edge to 1/2 inch (13 mm) in one application, can be sanded (interior use only).
			2.	Set Time - ASTM C 191 at 70 degrees F (21 degrees C): Initial set 25 minutes, final set 30 minutes.
			3.	Compressive Strength ASTM C 109 (air cured): 1 day - 2100 psi (114.5 MPa), 7 days - 2800 psi (19.3 MPa), 28 days - 4700 psi (32.4 MPa).
	** NOTE TO SPECIFIER ** ProSpec® RubCrete is a non-gypsum, polymer-enhanced, one-component concrete resurfacing product for filling and smoothing interior and exterior vertical concrete and masonry surfaces. Interior or exterior concrete walls including: Masonry block, Poured in place, Tilt up panels, Precast structures. Fill in surface defects including: Bug holes, Honeycombs, Cracks. Delete if not required.
		D.	Product: RubCrete as manufactured by Bonsal / ProSpec.
			1.	Application: RubCrete can be applied from feather edge to 1/2 inch (13 mm) in one application on interior or exterior concrete and masonry surfaces without cracking.
			2.	Working Time at 70 degrees F (21 degrees C).
			3.	Compressive Strength (ASTM C 109): 1 day - 600 psi (4.1 MPa), 3 days 1500 psi (10.3 MPa), 7 days 2000 psi (13.8 MPa), 28 days 3500 psi (24.1 MPa).
	** NOTE TO SPECIFIER ** Delete colors not required.
			4.	Color: Gray.
			5.	Color: White.
			6.	Color: Brown.
	** NOTE TO SPECIFIER ** ProSpec® BlendCrete™ is a polymer-modified, cement-based concrete and masonry patching compound for concrete resurfacing and rehabilitation. Used interior or exterior, above or below grade and or on vertical, overhead and horizontal surfaces. Suited for patching distressed horizontal, vertical and overhead surfaces including precast products, concrete pipe, curbs, sidewalks, bridges, panels and walls. Used to fill honeycombs, form tie rise holes, spalls or irregularities. Delete if not required.
		E.	Product: BlendCrete as manufactured by Bonsal / ProSpec.
			1.	Application: Placed in lifts up to 1 inch (25 mm) on vertical and overhead. Placed 1/2 inch to 3 inches thick on horizontal surfaces in one lift.
			2.	Working Time: 15 minutes at 70 degrees F (21 degrees C).
			3.	Set Time ASTM C 191 at 70 degrees F (21 degrees C): Initial set - approximately 20 minutes, Final set - approximately 30 minutes.
			4.	Compressive Strength ASTM C 928: 1 hour - 1,925 psi (13.3 MPa), 3 hours - 3,340 psi (23.0 MPa), 1 day - 4,885 psi (33.7 MPa), 7 days - 5,845 psi (40.3 MPa), 28 days - 6,500 psi (44.8 MPa).
			5.	Freeze/Thaw Resistance ASTM C 666 Method "B": After 300 cycles 1 percent loss due to slight scaling no spawling.
			6.	Average Scaling Resistance (ASTM C 672-98): (No. of cycles / Rating / Condition of surface).
				a.	/ 0 / No scaling visible.
			7.	Shear Bond Strength ASTM C 882: 1 day - 1,035 psi (7.1 MPa), 7 days - 1,650 psi (11.4 MPa).
			8.	Flexural Strength ASTM C 348: 1 day - 1,142 psi (7.9 MPa), 28 days - 1,180 psi (8.1 MPa).
	** NOTE TO SPECIFIER ** Delete colors not required.
			9.	Color: Gray #0.
			10.	Color: Gray #2.
			11.	Color: Gray #3.
			12.	Color: White.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Examine surfaces to receive concrete repair and restoration and conditions under which products will be installed.
		B.	Do not proceed with Work until surfaces and conditions comply with requirements required by manufacturer's printed instructions.
	3.2	PREPARATION
	** NOTE TO SPECIFIER ** Delete if not required.
		A.	Concrete Substrates:
			1.	Clean area and remove unsound concrete, grease, oil, paint and any other foreign materials that will inhibit performance.
			2.	Substrates shall be stable, solid and structurally sound.
			3.	The concrete surface shall be mechanically profiled by shot blasting, sand blasting or scarifying to achieve a CSP 3 to CSP 5 standard.
	** NOTE TO SPECIFIER ** Require for slabs on grade to receive moisture vulnerable floor coverings. Delete if not required.
			4.	After cleaning and profiling test for MVER (moisture vapor emission rate - reference ASTM F1869).
			5.	Repair deep areas, holes and nonmoving cracks with Bonsal / ProSpec BlendCrete prior to application and allow curing for a minimum of 3 hours.
	3.3	INSTALLATION
	** NOTE TO SPECIFIER ** When ProSpec CR is used as a veneer over cracked concrete, it is possible that existing cracks, particularly those that move even when repaired, may mirror through the thin layer of ProSpec CR. Delete if not required.
		A.	Crack Repair: Expansion joints shall be reflected through the Bonsal / ProSpec CR. Larger static cracks shall be repaired with a cementitious patching compound such as ProSpec Floor Patch or Premium Patch 200 prior to applying ProSpec CR. Repaired areas shall be set firmly prior to applying ProSpec CR. Small non-moving cracks shall be "V" saw cut to a solid core and be filled with an acrylic caulk. Crack repairs shall be allowed to cure and set completely (approximately 60 minutes at 70 degrees F (21 degrees C)) prior to covering.
			1.	Pour the mixed CR onto the substrate. Then spread with a squeegee, or flat trowel using enough pressure to assure good contact with the entire surface, then broom finish. Work in areas small enough for easy access for broom finishing without having to walk on the fresh CR. A broom finish shall be applied within 10-15 minutes of application while the product is still fresh. Pour subsequent applications while the previous application is still wet. On vertical installations such as stairs, trowel ProSpec CR directly onto the properly prepared distressed area and finish as desired, less water may be required.
			2.	ProSpec CR can be applied at a thickness of up to 1/2 inch (13 mm) and accept foot traffic after 2 hours, and rubber wheel traffic after 8 hours at 70 degrees F (21 degrees C).
	** NOTE TO SPECIFIER ** Delete if not required.
		B.	Floor Patch:
			1.	Mix only the amount of material that can be placed in 10-15 minutes.
			2.	The floor covering can be applied once the Floor Patch has completely cured, typically after 1-2 hours.
			3.	Can be sanded after initial set.
	** NOTE TO SPECIFIER ** ProSpec RubCrete is not formulated with aggregates that are gritty and interfere with featheredging or smooth surfaces. The paste like consistency is user friendly and fills in all gaps, holes and depressions. Delete if not required.
		C.	Rubbed Surfaces: Using a steel trowel, apply enough pressure and material to slightly over fill all voids and then touch ups shall be made to correspond to the adjacent profile. Achieve surface treatment by employing a damp sponge, trowel or rubber float after initial set has taken place. If required a second coat shall be applied before the first application sets up. Deeper areas and cool temperatures will extend hardening time. Working time at 70 degrees F (21 degrees C) will be approximately 30 minutes. Cool temperatures will delay hardening while warm temperatures will accelerate set.
	** NOTE TO SPECIFIER ** Delete if not required.
		D.	Immediately apply the fresh mortar into the entire surface, forcing BlendCrete firmly into the previously prepared area insuring full contact with all bonding surfaces. Slightly overfill the area. After initial set, using a trowel, shave BlendCrete to the desired final profile, shaving the patch from the center towards the bond edge at the existing surfaces. A wet spray may be used for final shaping. In deeper areas additional lifts can be made after the original patch has reached initial set. Score and roughen the original lift layer to improve bond between applications. BlendCrete can be placed in lifts up to 1 inch (25 mm) on vertical and overhead applications by holding the mortar in place until initial set has occurred.
	END OF SECTION