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HomeMy WebLinkAboutC_Alternate Waterproofing Grant Place Vault_200915_v8 L2 Engineers, LLC | 17848 NE 198th Place Woodinville, WA 98072 | TEL: 206-251-2346 L2 ENGINEERS, LLC 17848 NE 198th Place Woodinville, WA 98072 Memo To: Satwant Singh From: Brian Loshbough, P.E. L2 Engineers, LLC 17848 NE 198th Place Woodinville, WA 98072 Date: September 15th, 2020 Re: 17-015: Grant Place Vault Dear Satwant: The following letter is to summarize a proposed revision to the most recent repairs for the Grant Place Detention Vault. The most recently approved structural repair plans called for Sikagard 7600 to be applied to the interior surface of the perimeter walls. Based on conversation with the product manufacturer (email attached to this letter) we believe that a more limited application of Sikagard 62 will suffice to waterproof the vault walls. The following is a summary of the recommended application process. • The cured grout patches should be prepared by a water blast or light surface grinder. • One layer of Sikagard 62 should then be applied to the grout patches, lapped at least 6” onto sound concrete. • After the first layer of Sikagard 62 is no longer tacky, but before 48 hours has elapsed, a second layer of Sikagard 62 should then be painted over the entire surface of the first layer. • The application process of Sikagard 62 should be continuously inspected by a third-party special inspector. We have attached a product data sheet, and manufacturers specification for Sikagard 62. Please feel free to contact us with questions. Sincerely, L2 Engineers, LLC Brian Loshbough, P.E. Attachments: Correspondence with Sika, Product Data Sheet & Manufacturers Specifications for Sikagard 62 TRAND BOARD, WAFER RODUCT STANDARDS P OCATION ROOF LOOR WALLS HG U O BHSOL A N IJ.BRNOTGHIS N AFWOETATS REGIST E R E DPRO FESSIONAL E N G IN EER5 3 2 1 4 9/15/2020 RECEIVED 09/16/2020 striplett BUILDING DIVISION B18004340_v8 REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 From: Frank Calabrese <calabrese.frank@us.sika.com> Sent: Tuesday, September 15, 2020 7:56 AM To: Brian Loshbough <brian@L2ENGINEERS.com> Subject: RE: Fwd: Grant Place Detention Vault - Inspection Requirements Good morning Brian, I discussed this unique application with Our Tech Service Dept. They agree that if the concrete patch areas are prepped correctly and the patch, SikaTop 123, is applied correctly followed by a coating of Sikagard 7600 you should be fine. Please note: ➢ The SikaTop 123 should be given 5 to 7 days to cure in these current weather conditions before applying 7600. ➢ The cured SikaTop 123 should be prepped with a water blast or light surface grinder before applying 7600. Nothing too aggressive, just want to get any polymer bleed off the surface. ➢ Apply 60 mils of 7600 overlapping a minimum of 6 inches onto the concrete. ➢ If you are only going to coat the patches you may want to consider applying two coats of Sikagard 62 in lieu of our 7600. I am traveling for the balance of this week but will be available via cell phone. Please let me know if I can be of further assistance. Frank Calabrese, CSI, CDT District Manager CRSB Sales Sika Corporation 201 Polito Avenue - Lyndhurst, NJ, 07071 Phone: +1 201 933 8800 - Mobile: +1 206-491-1461 calabrese.frank@us.sika.com B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 Product Data Sheet Sikagard®-62 March 2020, Version 04.02 020606010010000001 PRODUCT DATA SHEET Sikagard®-62 HIGH-BUILD, PROTECTIVE, SOLVENT-FREE, COLORED EPOXY COATING PRODUCT DESCRIPTION Sikagard®-62 is a High-build, protective, solvent-free, colored epoxy coating. USES Sikagard®-62 may only be used by experienced professionals. Use as a high build, corrosion-resistant, protective coating, as a protective lining for secondary containment structures or as a seamless flooring system. CHARACTERISTICS / ADVANTAGES Exceptional tensile strength.▪ Good chemical resistance for long-term protection.▪ Convenient A:B = 1:1 mixing ratio.▪ Easy, paint-like viscosity.▪ Available in 3 standard colors: gray, red, and tan.▪ Excellent bonding to all common structural substrates.▪ Super abrasion resistance for long-term wear.▪ Sikagard® 62 gray in ANSI/NSF 61 potable water compliant ▪ Material is USDA certifiable.▪ PRODUCT INFORMATION Packaging 4 gal. units Appearance / Color Gray, red, tan. Shelf Life 2 years in original, unopened containers. Storage Conditions Store dry at 40°-95°F (4°-35°C). Condition material to 65°-75°F (18°-24°C) before using. Viscosity Mixed: Approximately 3,500 cps. TECHNICAL INFORMATION Abrasion Resistance 14 day 51 liters/mil.(ASTM D-968) Abrasion (Taber Abrader) Weight loss, 1,000 cycles (H-22 wheel, 1,000 gm weight) 7 day 0.61 gm (ASTM D-1044) Tensile Strength 14 day 5,400 psi (37.3 MPa)(ASTM D-638) 1 / 3 B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 Elongation at Break 14 day 2.7%(ASTM D-638) Tensile Adhesion Strength Adhesion Classification 1 day 4A (ASTM-3359) Permeability to Water Vapor Water Absorption (24 hour immersion) 7 day 0.1%(ASTM D-570) APPLICATION INFORMATION Mixing Ratio Component ‘A’ : Component ‘B’=1:1 by volume. Coverage Approximately 150-250 ft.2/gal. depending on condition of substrate. Pot Life Approximately 35 to 40 minutes. (60 gram mass). Tack-Free Time: Approximately 4 hours. Open Time: Light foot traffic: 5-7 hours. Rubber-wheel traffic: 8-10 hours. Cure Time Immersion and Chemical Exposure: Minimum cure: 3 days APPLICATION INSTRUCTIONS SUBSTRATE PREPARATION Surface must be clean and sound. It may be dry or damp, but free of standing water. Remove dust, laitance, grease, curing compounds, impregnations, waxes and any other contaminants. Preparation Work: Concrete - Should be cleaned and prepared to achieve a laitance and contaminant free, open textured surface by blast cleaning or equivalent mechanical means. Steel - Should be cleaned and prepared thoroughly by blast cleaning. MIXING Pre-mix each component. Proportion equal parts by volume of Components ‘A’ and ‘B’ into a clean mixing container. Mix with a low-speed (400-600 rpm) drill using a Sika paddle for 3 minutes, until uniform in color. APPLICATION Apply coating using high-quality roller, brush or spray. Two coats are recommended. Apply second coat as soon as the first coat is tack-free and the traffic of application will not damage the first coat. The second coat, however, must be applied within 48 hours since a longer delay will require additional surface preparation. Do not spray with slip resistant granules mixed into the coating. For use as a seamless flooring system, consult Technical Service. LIMITATIONS Minimum substrate and ambient temperature for application 50°F (10°C). ▪ Maximum moisture content of concrete substrate by weight when measured with a Tramex CME or CMExpert type concrete moisture meter is 4%. ▪ Do not apply over wet, glistening surface.▪ Material is a vapor barrier after cure.▪ Do not apply to porous surfaces exhibiting moisture- vapor transmission during the application. Consult Technical Service. ▪ Minimum age of concrete prior to application is 21-28 days, depending on curing and drying conditions. ▪ Do not apply to exterior, on-grade substrates.▪ Use oven-dried aggregate only.▪ Do not thin with solvents.▪ Not an aesthetic product. Color may alter due to variations in lighting and/or UV exposure. ▪ On ‘green or ‘damp’ concrete, EpoCem can be used as a pore filler to reduce vapor drive and potential osmotic blistering. ▪ BASIS OF PRODUCT DATA Results may differ based upon statistical variations depending upon mixing methods and equipment, temperature, application methods, test methods, actual site conditions and curing conditions. OTHER RESTRICTIONS See Legal Disclaimer. ENVIRONMENTAL, HEALTH AND SAFETY For further information and advice regarding transportation, handling, storage and disposal of chemical products, user should refer to the actual Safety Data Sheets containing physical, environmental, toxicological and other safety related data. User must read the current actual Safety Data Sheets before using Product Data Sheet Sikagard®-62 March 2020, Version 04.02 020606010010000001 2 / 3 B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 any products. In case of an emergency, call CHEMTREC at 1-800-424-9300, International 703-527-3887. LEGAL DISCLAIMER • KEEP CONTAINER TIGHTLY CLOSED • KEEP OUT OF REACH OF CHILDREN • NOT FOR INTERNAL CONSUMPTION • FOR INDUSTRIAL USE ONLY • FOR PROFESSIONAL USE ONLY Prior to each use of any product of Sika Corporation, its subsidiaries or affiliates (“SIKA”), the user must always read and follow the warnings and instructions on the product’s most current product label, Product Data Sheet and Safety Data Sheet which are available at usa.sika.com or by calling SIKA’s Technical Service Department at 1-800-933-7452. Nothing contained in any SIKA literature or materials relieves the user of the obligation to read and follow the warnings and instructions for each SIKA product as set forth in the current product label, Product Data Sheet and Safety Data Sheet prior to use of the SIKA product. SIKA warrants this product for one year from date of installation to be free from manufacturing defects and to meet the technical properties on the current Product Data Sheet if used as directed within the product’s shelf life. User determines suitability of product for intended use and assumes all risks. User’s and/or buyer’s sole remedy shall be limited to the purchase price or replacement of this product exclusive of any labor costs. NO OTHER WARRANTIES EXPRESS OR IMPLIED SHALL APPLY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. SIKA SHALL NOT BE LIABLE UNDER ANY LEGAL THEORY FOR SPECIAL OR CONSEQUENTIAL DAMAGES. SIKA SHALL NOT BE RESPONSIBLE FOR THE USE OF THIS PRODUCT IN A MANNER TO INFRINGE ON ANY PATENT OR ANY OTHER INTELLECTUAL PROPERTY RIGHTS HELD BY OTHERS. Sale of SIKA products are subject to the Terms and Conditions of Sale which are available at https://usa.sika.com/en/group/SikaCorp/termsandconditions.html or by calling 1-800-933-7452. Sika Corporation 201 Polito Avenue Lyndhurst, NJ 07071 Phone: +1-800-933-7452 Fax: +1-201-933-6225 usa.sika.com Sika Mexicana S.A. de C.V. Carretera Libre Celaya Km. 8.5 Fracc. Industrial Balvanera Corregidora, Queretaro C.P. 76920 Phone: 52 442 2385800 Fax: 52 442 2250537 Sikagard-62-en-US-(03-2020)-4-2.pdf Product Data Sheet Sikagard®-62 March 2020, Version 04.02 020606010010000001 3 / 3 B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 Spec Component: SC-054-03/10 Sikagard 62 DIVISION 9 - FINISHES Section 09900 Coatings Part 1 - General 1.01 Summary A. This specification describes the coating of substrates with a vapor-barrier, solvent-free, protective, dampproofing, waterproofing, moisture-insensitive, epoxy resin coating. 1.02 Quality Assurance A. Manufacturing qualifications: The manufacturer of the specified product shall be ISO 9001 certified and have in existence a recognized ongoing quality assurance program independently audited on a regular basis. B. Contractor qualifications: Contractor shall be qualified in the field of concrete repair and protection with a successful track record of 5 years or more. Contractor shall maintain qualified personnel who have received product training by a manufacturer's representative. C. Install materials in accordance with all safety and weather conditions required by manufacturer or as modified by applicable rules and regulations of local, state and federal authorities having jurisdiction. Consult Material Safety Data Sheets for complete handling recommendations. 1.03 Delivery, Storage, and Handling A. All materials must be delivered in original, unopened containers with the manufacturer's name, labels, product identification, and batch numbers. Damaged material must be removed from the site immediately. B. Store all materials off the ground and protect from rain, freezing or excessive heat until ready for use. C. Condition the specified product as recommended by the manufacturer. 1.04 Job Conditions A. Environmental Conditions: Do not apply material if it is raining or snowing or if such conditions appear to be imminent. Minimum application temperature 40ºF (5ºC) and rising. B. Protection: Precautions should be taken to avoid damage to any surface near the work zone due to mixing and handling of the specified material. 1.05 Submittals A. Submit two copies of manufacturer's literature, to include: Product Data Sheets and appropriate Material Safety Data Sheets (MSDS). 1.06 Warranty A. Provide a written warranty from the manufacturer against defects of materials for a period of one (1) year, beginning with date of substantial completion of the project. B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 Part 2 - Products 2.01 Manufacturer A. Sikagard 62, as manufactured by Sika Corporation, 1682 Marion Williamsport Road, Marion, Ohio, 43302 is considered to conform to the requirements of this specification. 2.02 Materials A. Epoxy resin coating: 1. Component A shall be a epoxy resin of diglycidilether of bisphenol A containing suitable viscosity control agents. It shall not contain butyl glycidyl ether. 2. Component B shall be primarily a reaction product of a selected amine blend with an epoxy resin of the epichlorohydrin bisphenol A type containing suitable viscosity control agents, pigments, and accelerators. 3. The ratio of Component A: Component B shall be 1:1 by volume B. Granules for slip-resistance shall be supplied by the manufacturer of the specified product and shall be able to be mixed into the coating and shall not settle during application. 2.03 Performance Criteria A. Typical Properties of the mixed epoxy resin coating: 1. Pot Life: 35- 40 minutes (60 gram mass) 2. Tack FreeTime: Approximately 4 hours 3. Color: red, grey, tan 4. Solids: 100% VOC g/l : 134 (A+B) 5. Immersion & Chemical Exposure: min. Cure 3 Days Typical Properties of the cured epoxy resin coating: Water Absorption (ASTM D-570) at 7days: 0.1% max. (2 hour boil), 24 hour immersion Elongation (ASTM D-522) at 14 days: 5% min. Abrasion Resistance (ASTM D-968) at 14 days: 51 liters/mil Adhesion classification (ASTM 3359) at 14 days: 4A. Abrasion (Taber Abrader) at 7 days: Weight loss: 0.65 gm. max. (H-22 wheel; 1000 gm weight; 1000 cycles) Tensile Properties (ASTM D-638) at 14 days: Tensile Strength 5,400 psi (37.3 Mpa) / Elongation at Break 2.7% Bond Strength (ASTM C-882) Hardened Concrete to Hardened Concrete 2 Day (dry cure): 2,000 psi (13.79 MPa) 14 Day (moist cure): 1,500 psi. (10.34 MPa) 8. The coating shall have United States Department of Agriculture approval. Note: Tests above were performed with the material and curing conditions @ 71oF – 75oF and 45-55% relative humidity. B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 Part 3 – Execution 3.01 Surface Preparation A. Substrate must be clean, sound, and free of surface contaminants. Remove dust, laitance, grease, oils, curing compounds, form release agents and all foreign particles by mechanical means. Substrate shall be in accordance with ICRI Guideline No. 03732 for coatings. 3.02 Mixing and Application A. Mixing: Premix each component. Proportion equal parts by volume of Component A and Component B into a clean, dry mixing pail. Mix throughly for 3 minutes min. with a jiffy paddle on a low-speed (400-600 rpm) drill. Mix only that quantity of material that can be used within its pot life (35 minutes at 73F). To minimize color difference, blend two complete Components B's together. Use only one of the blended Component B's to mix with a Component A. After the first Component B has been used, blend the second Component B with a new Component B and repeat the above procedeure for the entire application. B. Placement Procedure: The epoxy resin coating shall be applied only to approved, prepared surfaces with high- quality brushes, rollers, or spray equipment. Coating shall be applied at ambient and substrate temperatures between 50 and 90F. Application thickness shall be between 4-7 mils per coat. Subsequent coats shall be applied within 48 hours of the previous coat. Care is to be taken on vertical and overhead surfaces to avoid sags or runs. If this occurs, it must be sanded out and the area re-coated. If coating of horizontal surfaces that will receive traffic is specified, a slip-resistant aggregate, Sikagard 62 Granules, shall be incorporated into the mixed epoxy resin coating at 1/2 lb./gallon or as directed by the engineer. C. When applying the coating, if possible never stop the application until the entire surface has been coated. If possible always discontinue at an edge, corner, or joint. Never let a previously coated film dry. Always coat into wet film. Always apply the coating at a 450 angle to an edge, corner, or joint. D. Adhere to all limitations and cautions for the epoxy resin as stated in the manufacturers printed literature. 3.03 Cleaning A. The uncured epoxy resin coating can be cleaned from tools with an approved solvent. The cured epoxy resin coating can only be removed mechanically. B. Leave finished work and work area in a neat, clean condition without evidence of spillovers onto adjacent areas. B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 SC-054 Sikagard 62 Coating 1. Apply Sikagard 62 with high quality brushes or rollers. Care should be taken to avoid sags or runs. 2. When applying the coating, never stop the application until the entire surface has been coated. 3. Subsequent coats shall be applied within 48 hours of the previous coat. 4. For a slip-resistant surface, aggregate shall be incorporated into the mixed epoxy resin coating at a ½ lb./gal. Note: When applying Sikagard 62 always end at an edge, corner or joint. Do not apply 62 directly over joint filler. The preceding specifications are provided by Sika Corporation as a guide for informational purposes only and are not intended to replace sound engineering practice and judgment and should not be relied upon for that purpose. SIKA CORPORATION MAKES NO WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, AS TO THE ACCURACY, COMPLETENESS OR THE CONTENTS OF THESE GUIDE SPECIFICATIONS. Sika Corporation assumes no liability with respect to the provision or use of these guide specifications, nor shall any legal relationship be created by, or arise from, the provision of such specifications SIKA SHALL NOT BE RESPONSIBLE UNDER ANY LEGAL THEORY TO ANY THIRD PARTY FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND ARISING FROM THE USE OF THESE GUIDE SPECIFICATIONS. The specifier, architect, engineer or design professional or contractor for a particular project bears the sole responsibility for the preparation and approval of the specifications and determining their suitability for a particular project or application. B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020 Prior to each use of any Sika product, the user must always read and follow the warnings and instructions on the product's most current Technical Data Sheet, product label and Material Safety Data Sheet which are available at www.sikaconstruction.com or by calling (201) 933-7452. Nothing contained in any Sika materials relieves the user of the obligation to read and follow the warnings and instructions for each Sika product as set forth in the current Technical Data Sheet, product label and Material Safety Data Sheet prior to product use. B18004340_v8 RECEIVED 09/16/2020 striplett BUILDING DIVISION REVIEWED By: Alan Findlay, P.E. Date: 09/17/2020