Ak4 Concrete Solutions
191 Ruby Street.
Auburn CA 95603
TITLE: POLISHED CONCRETE SPECS
SPECIFICATION NO. AK4CS – PC – 113
This specification is provided by Ak4 Concrete Solutions as a service and general guideline for preparing the appropriate project specification sections. The Guidelines are dated, but you will still may find much of the Data useful. Every heading may not be needed. Delete headings not used and re-number remaining used headings to be numerically correct. We are decorative concrete craftsmen, consultants, designers and installers. Decorative concrete polishing is done by highly skilled craftsman in the field. Working with us will insure a unique, quality and an innovative concrete surface. Documentation has been compiled from the L&M Construction chemicals – The Concrete sawing and drilling association – Advanced floor products – Bomanite Corporation and Convergent concrete technologies. Retain or delete article below to suit project requirements
This Document Specifies both wet and dry process of finishing and polishing concrete floors, including products from Convergent concrete technologies chemicals.
Contact: Mark Foreman, Ak4 Concrete Solutions, 530-823-3056
SECTION AK4CS – PC - 113
POLISHED CONCRETE FINISHING
Section Includes: This Section specifies dyed and polished concrete and Specialty finishes
Specifier Note: Include in this Article only those sections that directly affect the work of this section.
Maintenance of Cast-in-Place Concrete
Specifier Note: This article does not require compliance with standard, but is merely a listing of references used. Article below should list only those industry standards referenced in this section. Retain only those reference standards to be used within the text of this Section. Add and delete as required for specific project.
American Concrete Institute (ACI):
ACI 302.1R Guide for Concrete Floor and Slab Construction.
ASTM C309 Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete.
ASTM C171 Standard Specification for Sheet Materials for Curing Concrete.
ASTM C779 Standard Test Method for Abrasion Resistance of Horizontal Concrete Surfaces.
ASTM F609 – Standard Test Method for Using a Horizontal Pull Slip meter
Performance Requirements: Provide polished flooring that has been selected, manufactured and installed to achieve the following:
Abrasion Resistance: ASTM C779, Method A, high resistance, no more than 0.008 inch (0.20 mm) wear in 30 minutes.
Reflectivity: Increase of 35% as determined by standard gloss meter.
Waterproof Properties: Rilem Test Method 11.4, 70% or greater reduction in absorption.
High Traction Rating: NFSI 101-A, non-slip properties.
Hardened Concrete Properties:
Portland cement: shall conform to ASTM C 150, Type 1, 2 or 5.
Normal Weight Concrete: No lightweight aggregate.
Aggregates: Shall conform to ASTM C 33.
Water: Mixing water shall be fresh, clean and potable.
Water – reducing Admixtures: Water-reducing admixtures are permitted and shall conform to ASTM C 494
Pozzolans: Fly Ash conforming to ASTM C618 type F or Blast Slag conforming to ASTM C989 is required for use in the concrete mix design.
Natural concrete slump of 4 1/2 inches - 5 inches (114 - 127 mm). Admixtures may be used.
Overall FF 40.
Local FF 20.
Hard-Steel Troweled (3 passes) concrete: No burn marks. Finish to ACI 302.1R, Class 5 floor or float finish. Does not apply to all specialties of polished finishes.
Slump: 4 to 6 inch slump. Obtain approval from Owners authorized Representative if slump is outside parameters.
Minimum PSI Rating: 28 days @ > 3,000 PSI with 60 Days @ 4000 PSI.
Cement quantity per yard of mix: A) Minimum 5 Sacks B) Maximum 7 Sacks.
Water/Cement Ratio: Maximum .6. 5. Aggregates: Use maximum top size aggregate with lowest paste content possible.
Admixtures: Mid Range water reducers recommended.
Fly Ash or blast slag: Use in all applications possible up to 40% cement content.
Accelerators: Do not use accelerators.
Specifier Note: Retain or delete article below to suit project requirements.
Class 6 floors, special colored mineral aggregate hardener with repeated hard steel trowel finish.
Membrane forming curing compounds (ASTM C309, Type 1, Class B, all resin, dissipating cure).
Acrylic curing and sealing compounds not recommended.
Sheet membrane (ASTM C171)
1) Polyethylene film not recommended.
Damp Curing: Seven day cure.
Specifier Note: Article below includes the submittal of relevant data to be furnished by Contractor before, during or after construction. Coordinate this article with Architect’s and Contractor’s duties and responsibilities in Contract Conditions.
General: Submit listed action submittals in accordance with Contract Conditions
Shop Drawings: Indicate information on shop drawings as follows:
Typical layout including dimensions and floor grinding schedule.
Plan view of floor and joint pattern layout.
Areas to receive colored surface treatment.
Hardener, sealer, densifier in notes.
Provide submittal information within 35 calendar days after the contractor has received the owners notice to proceed.
Submit special concrete finishes describing product to be provided, giving manufacturers name and product name for the specified material proposed to be under this section.
Submit special concrete finishes manufacturers / Installers recommended installation procedures: Which when approved by the Architect, will become the basis for accepting or rejecting actual installation procedures used on the work.
Product Data: Submit product data, including manufacturer’s SPEC-DATA® product sheet, for specified products.
Material Safety Data Sheets (MSDS).
Preparation and concrete grinding procedures.
Colored Concrete Surface, Dye Selection Guides.
Test Reports: Certified test reports showing compliance with specified performance characteristics and physical properties as cited in 1.03 Performance Requirements.
Product certificates signed by manufacturer certifying materials comply with specified performance characteristics, criteria and physical requirements.
Letter of certification from the National Floor Safety Institute confirming the system has been tested and passed phase Two Level of certification when tested by Method 101-A.
Warranty: Submit warranty documents specified.
Operation and Maintenance Data: Submit operation and maintenance data for installed products in accordance Closeout Submittals.
Manufacturer’s and installers instructions on maintenance renewal of applied treatments.
Protocols and product specifications for joint filing, crack repair and/or surface repair.
Installer experienced in performing work of this section who has specialized in installation of work similar to that required for this project.
Installer trained and holding current certification for Convergent Concrete Technologies’ Densifiers.
Manufacturer Qualifications: Manufacturer capable of providing field service representation during construction and approving application method.
Specifier Note: Paragraph below should list obligations for compliance with specific code requirements particular to this section. General statements to comply with a particular code are typically addressed in Conditions of the Contract and Section 01 41 00 - Regulatory Requirements. Repetitive statements should be avoided. Current data on building code requirements and product compliance may be obtained from manufacturer and Ak4 Concrete Solutions technical support specialists.
NFSI Test Method 101-A Phase Two Level High Traction Material.
Construct mock-ups in accordance with Quality Control.
Specifier Note: Edit paragraph below to specifying mock-up size.
Mock-Up Size: [100 ft2 (9.3 m2)] sample panel at jobsite at location as directed under conditions similar to those which will exist during actual placement.
Mock-up will be used to judge workmanship, concrete substrate preparation, operation of equipment, material application, color selection and shine.
When accepted, mock-up will demonstrate minimum standard of quality required for this work. [Approved mock-up may [Not] remain as part of finished work.] [Remove mock-up and dispose of materials when no longer required and when directed by Consultant.
Pre-installation Meetings: Conduct a preinstallation meeting to verify project requirements, manufacturer’s installation instructions and manufacturer’s warranty requirements. Comply with Project Meetings. Review the following:
Scheduling and phasing of work.
Coordinating with other work and personnel.
Protection of adjacent surfaces.
Repair of defects and defective work prior to installation.
Installation of polished floor finishes.
Application of liquid hardener, densifier.
Protection of finished surfaces after installation.
DELIVERY, STORAGE & HANDLING
General: Comply with Common Product Requirements.
Ordering: Comply with manufacturer’s ordering instructions and lead time requirements to avoid construction delays.
Deliver materials in manufacturer’s original packaging with identification labels and seals intact.
Storage and Protection:
Store materials protected from exposure to harmful weather conditions and at temperature conditions recommended by manufacturer.
Protect concrete slab.
Protect from petroleum stains during construction.
Diaper hydraulic power equipment.
Restrict vehicular parking.
Restrict use of pipe cutting machinery.
Restrict placement of reinforcing steel on slab.
Restrict use of acids or acidic detergents on slab.
Waste Management and Disposal:
Separate waste materials for [Reuse and Recycling] in accordance with Construction Waste Management and Disposal.
Remove from site and dispose of packaging materials at appropriate recycling facilities.
PROJECT AMBIENT CONDITIONS
Installation Location: Comply with manufacturer’s written recommendations.
Sequence with Other Work: Comply with manufacturers and/or Ak4Concrete Solutions written recommendations for sequencing construction operations.
Specifier Note: Coordinate article below with Conditions of the Contract and with warranties.
Project Warranty: Refer to Contract Conditions for project warranty provisions.
Manufacturer’s Warranty: Submit, for Owner’s acceptance, installers, and manufacturer’s standard warranty document executed by authorized company official. Manufacturer’s and Ak4 Concrete Solutions warranty is in addition to, and does not limit, other rights Owner may have under Contract Documents.
Specifier Note: Coordinate article below with manufacturer’s warranty requirements.
Warranty: Commencing on date of acceptance by [Owner] [Architect] [Consultant].
Comply with contractor and manufacturer’s written instructions to maintain installed product.
General Contractor to provide maintenance materials in accordance with Section Closeout Submittals.
Ensure manufacturer has minimum  years experience in manufacturing components similar to or exceeding requirements of project.
Specifier Note: Retain article below for proprietary method specification. Add product attributes performance characteristics, material standards and descriptions as applicable. Use of such phrases as “or equal” or “or approved equal” or similar phrases may cause ambiguity in specifications. Such phrases require verification (procedural, legal and regulatory) and assignment of responsibility for determining “or equal” products. Ak4 Concrete Solutions recommends 1. Pentra - Sil (NL) 2. Pentra-Sil (244Plus) or 3. Pentra-Guard (HP) Why added protection? Lithium densifiers require up to 6 months to reach maximum density and stain protection.
Polished Concrete Finishing Products
Convergent Concrete technologies Inc.
Hardener, Sealer, Densifier: Proprietary, water based, odorless liquid, VOC compliant, environmentally safe chemical hardening solution leaving no surface film.
Joint Filler: Hi – Tech Structural Polyurea joint filler HT – PE85: two component rapid curing Polyurea joint filler. Containing <70g/l VOC designed to fill and support the sawed joints in a concrete slab while being compatible with Ak4 concrete Solutions Polishing process.
Acceptable Material: Ak4 Concrete Solutions cementious polymer filler.
Concrete Dyes: Fast-drying dye packaged in premeasured units ready for mixing with VOC exempt solvent; formulated for application to polished cementitious surfaces.
Acceptable Material: AmeriPolish® Polished Concrete Dye
Cleaning Solution: Proprietary, mild, highly concentrated liquid concrete cleaner and conditioner containing wetting and emulsifying agents; biodegradable, environmentally safe and certified High Traction by National Floor Safety Institute (NFSI). Use any Ph balanced neutral cleaner, with a Ph factor between 7 & 10.
Acceptable Material: Zep Blue Neutral cleaner or equal
Specifier Note: If more than one concrete finish is required for the project, copy and edit the following articles as required and
identify finishes and other variables in a schedule at the end of Part 3 of this section.
Finish: Standard [High gloss (HG-1), 1500 grit], or optional [Medium gloss (MG-2), 800 grit] [Very high gloss (VGH-3), 3000 grit]. Very Low Gloss (VLG-4), 400 grit
Specifier Note: AmeriPolish Dyes are available in 22 colors. The colors can be combined to create an unlimited number of color variations. For color selection, refer to the AmeriPolish Dye color chart that can be found on their website, http://www.ameripolish.com/PDF/AP%20Color%20Chart_110907.pdf
SOURCE QUALITY CONTROL
Ensure concrete finishing components and materials are from single manufacturer.
Specifier Note: Edit Paragraph below to suit project requirements. If substitutions are permitted, edit text below. Add text to refer to Section 01 25 13 - Product Substitution Procedures.
Substitutions: [In accordance with Product Substitution Procedures [No substitutions permitted].
Specifier Note: Revise article below to suit project requirements and specifier’s practice.
Compliance: Comply with manufacturer’s written data, including product technical bulletins, product catalog installation instructions, product carton installation instructions and Convergent Concrete Technologies Inc., SPEC-DATA sheets.
Site Verification of Conditions:
Verify that concrete substrate conditions, which have been previously installed under other sections or contracts, are acceptable for product installation in accordance with manufacturer’s instructions prior to installation of concrete finishing materials.
Specifier Note: Consult floor finishing product installer (Ak4 Concrete Solutions) or manufacturer for additional concrete placement specifications required for application of floor finishing products. Coordinate with Section [Cast-in-Place Concrete].
Verify Concrete Slab Performance Requirements:
Verify concrete is cured to [28 day] 3500 psi (24 MPa) strength.
Verify concrete surfaces received a hard steel-trowel finish (3 passes) during placement.
Verify specialty concrete surfaces designed by Ak4 Concrete Solutions.
Ensure surfaces are clean and free of dirt and other foreign matter harmful to performance of concrete finishing materials.
Examine surface to determine soundness of concrete for polishing.
General Contractor to remove surface contamination.
Specifier Note: Coordinate installation with the manufacturer’s written installation details and instructions.
Floor Surface Polishing and Treatment:
Provide polished concrete floor treatment in entirety of slab indicated by drawings. Provide consistent finish in all contiguous areas.
Apply floor finish prior to installation of fixtures and accessories.
Diamond polish concrete floor surfaces with power disc machine. Sequence with coarse to fine grit using dry or Ak4 concrete solutions wet/dry or dry method.
Comply with Ak4 Concrete solutions recommended polishing grits for each sequence to achieve desired finish level. Level of sheen shall match that of approved mock-up.
Expose aggregate in concrete surface only as determined by approved mock-up.
All concrete surfaces shall be as uniform in appearance as possible.
Dyed and Polished Concrete (option):
Locate demarcation line between dyed surfaces and other finishes.
Polish concrete to final finish level.
Apply diluted dyes to polished concrete surface.
Allow dye to dry.
Remove residue with dry buffer; reapply as necessary for desired result.
Apply Convergent Technologies, Pentra Sil NL Densifier As Follows:
First coat at 250 ft2/gal (6.25 m2/L).
Second coat at 350 ft2/gal (8.75 m2/L).
Follow manufacturer’s recommendations for drying time between successive coats.
Remove defects and repolish defective areas.
Finish edges of floor finish adjoining other materials in a clean and sharp manner.
Polish to higher gloss those areas not meeting specified gloss levels per mock-up.
Fill joints flush to surface.
Do cleanup in accordance with Section Cleaning and Waste Management.
Mechanically scrub treated floors for seven days with soft to medium pads with approved cleaning solution.
Upon completion, General Contractor must remove surplus and excess materials, rubbish, tools and equipment.
Specifier Note: Coordinate the following Article with Section Protecting Installed Construction.
Protect installed product from damage during construction in accordance with Section Protecting Installed Construction.
Protect with EZ Cover™ by McTech Corp., or comparable product.
Contact: Phone: (866) 913-8363; website: www.ezform.net.
Specifier Note: Include a schedule of finish types, colors and locations to suit project requirements.
Standard Finish High Gloss HG-1, Color: [Location].
Optional Finish Medium Gloss MG-2, Color: [Location].
Optional Finish Very High Gloss VHG-3, Color: [Location].
Optional Finish Very Low Gloss VLG-4
END OF DOCUMENT