Allied Construction Technologies, Inc. AC•Tech Oil Buster System™(OBS)
AC•Tech OBS SPECIFICATION; Division 9
Section 09601
OIL REMOVAL AND CONTAINMENT SYSTEM CONTAMINATED CONCRETE SLABS
PART 1 – GENERAL
1.1 SECTION INCLUDES
A. Oil Removal & Containment System for oil and hydrocarbon contaminated concrete slabs.
1.2 RELATED DOCUMENTS
A. Drawings, documents, and general provisions of the Contract, including, but not necessarily limited to, General Conditions and Division 1 Specification Sections, apply to this Section.
B. Related Sections- Coordinate work of this Section with work of other Sections to properly execute the work requirements and maintain satisfactory progress of work in other Sections.
1. Section 03300: Cast-In Place Concrete Installation and curing requirements according to ACI 302.
2. Section 09699: Water Vapor Emission Control System: Top coating system required where initial moisture vapor transmission test results (ASTM F1869) exceed 6 lb /1,000 sq. ft. / 24 hour period.
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C. References
1. ASTM E96 – Standard Test Methods for Water Vapor Transmission of Materials
2. ASTM E1907 – Standard Practices for Determining Moisture-Related Acceptability of Concrete Floors to Receive Moisture-Sensitive Finishes.
3. ASTM F1869 – Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Floor Using Anhydrous Calcium Chloride.
4. ASTM F2170 – Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes.
1.3 SUMMARY
A. This Section includes the furnishing, testing, and application of systems for the removal of surface & sub-surface oil and hydrocarbon contamination in existing concrete slabs where a moisture vapor transmission barrier or other resilient or epoxy floor coating system is to be installed.
1.4 SUBMITTALS
A. General: Submit each item in this Article according to the, requirements and Conditions of the Contract in Section 01300.
B. Product data for each type of product and process specified, which shall include:
1. Manufacturer’s Specification
2. Installation Instructions
3. Independent Test Data
4. Certification Requirements
5. Warranty Information
1.5 QUALITY ASSURANCE
A. Qualifications of Applicator/Installer:
1. Employ an Applicator currently approved by the manufacturer, experienced in surface preparation and
application of the material and subject to inspection and control of the manufacturer.
2. Applicator/Installer shall have no less than five (5) years experience installing resin-based fluid applied
coating systems and operating the various equipment required for the system.
B. Manufacturer’s Qualifications:
1. Manufacturer shall have no less than ten (10) years experience in manufacturing oil resistant coating systems. The oil resistant coating system must be specifically formulated and marketed for oil and alkalinity resistance. System design shall not have changed for a minimum of five (5) consecutive years prior to the start of the project work.
2. Manufacturer shall provide the Owner with their standard ten (10) year warranty at no additional cost. Applicator of water vapor reduction system shall provide standard installation warranty for workmanship.
3. Submit list of product use and performance history, for the same formulation and system design, listing reference sources for at least 3 projects dating back for a minimum of 5 years.
C. Test area; Mock-Up: Provide a testing area or mock-up for evaluation of surface preparation techniques and
installer workmanship.
1. Finish areas designated by the Architect.
2. Do not proceed with remaining work or project until the Architect approves the workmanship,
preparation, coverage and other pertinent parameters.
3. Refinish test; mock-up area as required to produce acceptable joining with finish work.
1.6 DELIVERY, STORAGE AND HANDLING
A. Deliver products to the job site in their original unopened containers, clearly labeled with the manufacturer's name and brand designation.
B. Store products in an approved ventilated dry area; protect from dampness, freezing, and direct sun light. Product should not be stored in areas with temperatures in excess of 90 °F (32° C) or below 50 °F (10° C).
C. Prevent breakage of containers and damage products by proper handling procedures.
1.7 PROJECT/SITE CONDITIONS
A. Environmental Conditions
1. Do not apply Oil Removal & Containment System to unprotected surfaces or when water is accumulated on the surface of the concrete.
2. Do not apply Oil Removal & Containment System when temperature is lower than 50° F (10° C) or expected to fall below this temperature within 24 hours from time of application.
B. The owner shall select a final floor covering system scheduled for the treated concrete substrate having the ability to withstand water vapor transmission levels up to 3 lbs. /1,000 sq. ft. / 24 hours and/or 75% Relative Humidity.
C. Maintain environmental conditions (temperature and ventilation) within limits recommended by the manufacturer for best results. Do not install products below the conditions as listed and set by the manufacturer.
1. Do not apply the oil resistant coating to any unprotected surfaces or over standing water on concrete surfaces. Concrete surfaces to be treated shall be damp or wet with all standing water vacuumed off.
2. Do not apply the oil resistant coating when ambient temps are below 50° F (10° C) or expected to fall below this temp within 24 hours of application.
3. Do not apply the oil resistant coating when ambient temps will exceed 90° F (32° C).
4. Provide continuous ventilation and indirect air movement during application and during the curing process for the oil resistant coating.
5. Protect oil resistant coating system to prevent damage from rain, surface water incursion or freezing conditions for a minimum of 24 hours after application.
1.8 SCHEDULING
A. Before installation of VCT, sheet vinyl, rubber flooring, wood, carpet and/or epoxy flooring systems over the interior concrete slabs, anhydrous calcium chloride testing ASTM F 1869 and/or RH Probe Tests ASTM F 2170™ shall be performed by the Owner's Special Inspector as outlined In Article 3.1 below.
B. The Owner's Special Inspector will coordinate with the Owner scheduling oil contamination core/sample testing and allowing enough time to test, submit and install the oil resistant system before installation of floor finish.
C. The Owner's Special Inspector will allow a minimum of 28 days or as much time as is reasonable for the concrete slab to dry before installing Anhydrous Calcium Chloride tests and/or RH In-Situ Probe Tests. All flooring, mastics, glues, and/or surface debris shall be removed to provide an absorptive, sound concrete substrate prior to installing tests as per ASTM F1869 and ASTM F2170.
PART 2 – PRODUCTS
2.1 MANUFACTURERS
A. Acceptable Manufacturer: Allied Construction Technologies, Inc. (AC•Tech) 3302 Croft Street; Norfolk, VA 23513 (757) 855-5100.
1. AC•Tech Oil Buster System™ (OBS) provided by AC•Tech
2. Oil Removal & Containment System, which may be Incorporated In the work, shall be the product of a single manufacturer, no substitutions.
3. Requests for substitutions will be considered in accordance with the provisions of Section 01600.
4. Provide materials of one manufacturer throughout the project.
B. Terminology hereafter is based upon the products of AC•Tech.
2.2 SYSTEM; MATERIALS
A. General: Use materials of one manufacturer throughout the project as hereinafter specified.
B. Oil Removal and Containment System: Penetrating Oil Extraction Detergent with an applied Oil Resistant Epoxy Coating, specifically formulated chemicals and resins to provide the following characteristics and properties in a one coat system.
1. The installation consists of one to two (1 - 2) applications of the Penetrating Oil Extraction Detergent and one (1) coat of the Oil Resistant Epoxy Coating to be applied to a properly prepared concrete substrate.
C. Penetrating Oil Extraction Detergent:
1. Product: AC•Tech Oil Buster System™ Detergent (OBS-D) as manufactured by AC•Tech.
2. Physical Properties:
a. Color: Clear
b. VOC: 0.0 gm/L
c. Biodegradable Oil Emulsifier
D. Oil Resistant Epoxy Primer:
1. Product: AC•Tech Oil Buster System™ Coating (OBS-C) as manufactured by AC•Tech.
2. Physical Properties:
a. Two-component epoxy resin
b. Viscosity: 800 CPS
c. Mix Ratio by weight: 8.33:1; By Volume: 3.5:1
d. Pot Life @ 70°F (21°C): ~1 hour
e. Compressive Strength: 11,500 PSI
f. Specific Gravity: 2 gm/cm3
g. Flash Point: > 200°F (>95°C)
h. Solids: 98%
i. VOC: 4 gm/L
j. Color: Gray
E. Sand Broadcast: Application of a broadcast sand into wet OBS-C to be broadcast at ~15 minutes after application of OBS-C.
1. Product: US Silica “Q-Roc” # 2 or similar product
2. Physical Properties:
a. Silica Sand; washed and dried measured sieve sizing.
b. Mesh/Sieve Size: 40 – 50 / 50 – 60 mix; avoid mesh sizes 70 and over.
c. Do not use commercial play sand (unwashed and un-dried).
3. Prior to installation of any cementitious patch or self-leveling underlayment system, ensure all excess sand from the broadcast of the OBS-C is removed from the surface of the cured OBS-C Epoxy Coating.
F. (OPTIONAL) Hydraulic Cementitious Materials
1. After AC•Tech OBS-C has cured, be sure to follow any and all manufacturers instructions for subsequent installation of cementitious materials.
2. Ensure cementitious materials are compatible with the AC•Tech OBS-C Epoxy Coating prior to installation.
a. Installing a test installation of the proposed cementitious material over the AC•Tech OBS-C Epoxy Coating is recommended.
3. Ensure underlayment material and thickness are suitable with subsequent flooring system adhesives and materials.
G. If Substrate Moisture Vapor Emissions Rate (Transmission) exceed 6 lbs (ASTM F1869), then a Vapor Reduction System must be applied over the cured OBS-C.
1. Products: Manufactured by AC•Tech
a. AC•Tech 2170™; Moisture Reduction and Alkalinity Control System.
b. AC•Tech 2170™ SLP Self-Leveling Primer, for the application and bonding of subsequent cementitious underlayments over the cured Moisture Reduction System.
2. Consult all appropriate product technical data sheets and architectural specifications for further information regarding the AC•Tech 2170™ and AC•Tech 2170™ SLP should it be required.
2.4 MIX DESIGNS
A. Use clean containers and mix thoroughly as per Manufacturer's requirements to obtain a homogeneous mixture. Pre-mix the “A” component of the oil resistant epoxy coating prior to adding the “B” component. Use a low speed motor less than 400 rpm and a two bladed Jiffy mixing blade only. DO NOT AERATE. Mix ratios are measured by volume.
B. AC•Tech OBS Mix Ratio: Mix Component A and B at a ratio of 4:1 by volume; 8.33:1 By Weight.
PART 3 – EXECUTION
3.1 EXAMINATION
A. Submit Anhydrous Calcium Chloride testing according to ASTM F1869 (using latest ASTM standard) and/or RH In-Situ Probe Test according to ASTM F2170 (using ASTM latest standard), and ASTM F710. Tests shall be performed by the Owner's Special Inspector and results provided to the Architect, Owner, General Contractor, and Oil Resistant Coating Systems Manufacture's Representative.
B. Submit concrete core samples from any and all areas where contamination is suspected or evident.
1. Concrete core samples must be taken from the installation area by the Owner’s Special Inspector.
2. Core samples should be marked and tagged according to the location from which they were taken.
3. Core samples shall be approximately 3” in diameter and 2” in depth/height (“short cores”).
4. A site map detailing the core sample locations must be included with core samples.
C. Submit data set and analysis generated by core samples taken from project floor as determined by an independent, prominent laboratory and submitted to the Architect, General Contractor, Applicator and Oil Resistant System’s Manufacturer’s Representative. The concrete should receive testing for concrete deficiencies and contaminates using the following protocols:
1. Ion-Chromatography (IC)
a. Checks for metallic sodium and potassium salts and chlorides
b. Checks for un-reacted sodium and potassium silicates
2. Infrared Spectroscopy (IR)
a. Checks for organic contaminates
1. Hydrocarbons: Oils, grease, fuel
2. Organics: Blood, urine and other organic contamination
3. X-Ray Diffraction (XRD) & Energy Dispersive X-Ray (EDXA)
a. Checks for constituents in concrete matrix
1. Aggregate
2. Fines
4. (Optional) Thin-Slice Petrography
a. Checks for Alkali-Silica-Reaction (ASR) and other deleterious conditions in concrete.
5. Concrete should conform to ACI Committee 201 Report “Guide to Durable Concrete.”
6. Ensure manufacturer’s technical staff receives all testing analysis and results.
7. Core sample data and analysis will determine installation procedures for OBS-D.
D. Adhesion tests:
1. The Owner's Special Inspector shall verify proper adhesion of flooring adhesives, coatings, and leveling compounds to the final Oil Removal and Containment System or Vapor Reduction System for acceptability. Contact Manufacturer's Representatives for recommendations.
3.2 PREPARATION
A. Prepare concrete surface in accordance with ICRI Technical Guideline No. 03732:
1. Clean all surfaces to receive Oil Buster System™.
2. Remove all foreign matter such as adhesives, coatings, floor covering, leveling compounds, paint and any obstructions.
3. Shot blast and grind all floors per ICRI Technical Guideline No. 03732 to a CPS-4.
4. If surface contamination prevents proper preparation, a preliminary cleaning with the OBS-D will be required. Consult manufacturer’s technical staff for further instructions.
5. Use a magnetic broom or similar tool to remove any fugitive shot.
6. Clean surfaces with Vacuum and remove any dust, debris and residue from the substrate.
7. Remove all old stopping and/or flexible materials from expansion joints and clean all dust and dirt from cracks and control cuts.
8. Static or non-moving cracks that are 1/64“ wide or less can be sealed or flooded with the OBS-C Epoxy Coating during normal OBS-C application, not before treatment with the OBS-D.
9. Static or non-moving cracks that are between 1/64” and 3/64“ wide and in temperature stable environments can be saw-cut/chased and filled with the OBS-C Epoxy Coating during normal OBS-C application, not before treatment with the OBS-D.
10. Static or non-moving cracks, control cuts and expansion joints that are larger than 3/64“ AND any dynamic or moving cracks, control cuts and expansion joints or any concrete substrates that are exposed to temperature fluctuations should be treated as follows:
a. Open crack, control cut or expansion joint to 1/4” width and coat all exposed crack walls with the OBS-C Epoxy Coating during normal installation.
b. Once OBS-C with sand broadcast is cured, install a flexible backer rod into void.