Epoxy-Injected Crack Repair
Contents
1. Spec Component SC 018 0807 CONCRETE RESTORATION SYSTEMS DIVISION 3 CONCRETE Section 03930 Concrete Rehabilitation Epoxy Injected Crack Repair Part 1 General 1 01 1 02 1 03 1 04 1 05 1 06 Summary A This specification describes the pressure injection of cracks with an epoxy resin adhesive Quality Assurance A Manufacturing qualifications The manufacturer of the specified product shall be ISO 9001 9002 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 the 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 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 un2. Flexural Strength ASTM D 790 min a 7 day 6 100 psi 42 MPa Tangent Modulus of Elasticity in Bending min b 7 day 167 000 psi 11 520 MPa 5 Bond Strength ASTM C 882 14 day moist cure min a Hardened Concrete to Hardened Concrete 2 900 psi 20 Mpa 5 Water Absorption ASTM D 570 a 24 hour 0 07 3 Tensile properties ASTM D 638 min a 7day Tensile Strength 3 300 psi 22 7 Mpa Elongation at Break 0 9 Note Tests above were performed with material amp curing conditions at 73F amp 45 55 relative humidity Part 3 Execution 3 01 Mixing and Application A Mixing the epoxy resin adhesive for sealing the cracks amp porting devices Pre mix each component Proportion equal A B 1 1 parts by volume of Component A and Component B into a clean dry mixing pail Mix thoroughly for 3 minutes with a jiffy paddle on a low speed 400 600 rpm drill Mix only that quantity of material that can be used within its potlife 60 minutes 500gram mass 73F Mixing of the epoxy resin adhesive used for the pressure injection grouting 1 Manual Proportion two parts by volume of Component A to one part Component B into a clean dry mixing pail Mix thoroughly for 3 minutes with a jiffy paddle on a low speed 400 600 rpm drill Mix only that quantity of material that can be used within its potlife 20 30 minutes 73F C D Placement procedure 1 The epoxy resin adhesive for sealing the cr
3. acks amp porting device Set the porting devices as required by the epuipment manufacturer Spacing of the porting devices shall be accomplished as required to achieve the travel of the epoxy resin for the pressure injection grouting between ports and fill the cracks to the maximum On structures open on both sides provide porting devices on opposite sides at staggered elevations Apply the mixed epoxy resin adhesive for sealing over cracks and around each porting device to provide an adequate seal to prevent the escape of the epoxy resin adhesive for the injection grouting Where required by the Engineer apply the epoxy resin adhesive for sealing in such a manner that minimal defacing or discoloration of the substrate shall result 2 The epoxy resin adhesive for the pressure injection grouting Manual Load the mixed epoxy resin adhesive for grouting into a disposable caulking cartridge or bulk loading caulking gun Inject the prepared cracks with a consant pressure in order to achieve maximum filling amp penetration without the inclusion of air pockets or voids in the epoxy resin adhesive Begin the pressure injection at the widest part of the crack being injected and continue until there is the appearance of epoxy resin adhesive at an adjacent port thus indicating travel When travel is indicated to discontinue or continue the pressure injection from that port should be made by the contractor based on his experience with the approval of the En
4. eparation and approval of the specifications and determining their suitability for a particular project or application 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
5. finished work and work area in a neat clean condition without evidence of spillovers onto adjacent areas Sikadur 52 SC018 Sikadur 31 Hi Mod Gel Crack Filler Cap Seal 1 Set porting devices over cracks 2 Place mixed Sikadur 31 Hi Mod Gel epoxy resin adhesive over cracks and around each injection port a minimum of 1 wide by a 1 4 thick 3 Allow sufficient time for epoxy resin adhesive cap seal to set before injecting 4 When the cap seal has cured inject Sikadur 52 with steady pressure 4 Use automated injection equipment or manual method 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 pr
6. gineer Continue procedure until pressure injectable cracks has been filled Automated Dispense the epoxy resin adhesive for grouting under constant pressure in accordance with prcedures recommended by the equipment manufacturerer as required to achieve maximum filling and penetration of the prepared cracks without the inclusion of air pockets or voids in the epoxy resin adhesive The pressure injection of single or multiple ports by use of a manifold system is possible This decision should be made by the contractor with the approval of the Engineer Continue the approved procedure until all pressure injectable cracks have been filled If penetration of any cracks is impossible consult the Engineer before discontinuing the injection procedure If modification of the proposed procedure is required to fill the cracks submit said modification in writing to the Engineer for acceptance prior to proceeding E Adhere to all limitations and cautions for the epoxy resin adhesive in the manufacturers current printed literature 3 02 Cleaning A After the epoxy resin adhesive for grouting has cured the epoxy resin adhesive for sealing cracks and porting devices shall be removed as required by the Engineer Clean the substrate in a manner to produce a finish appearance acceptable to the Owner The uncured epoxy resin adhesive can be cleaned from tools with approved solvent The cured epoxy resin adhesive can only be removed mechanically Leave
7. of the cured epoxy resin adhesive used for pressure injection of grout 1 Compressive Strength ASTM D 695 a 3day 10 000 psi 68 9 MPa b 7 day 11 300 psi 77 9 MPa c 28 day 12 000 psi 82 7 MPa Compressive Modulus psi a 7 day 350 000 psi 2400 Mpa 2 Shear Strength ASTM D 732 a 14 day 4 300 psi 29 6 MPa 3 Flexural Strength ASTM D 790 a 14 day 5 400 psi 37 2 MPa Tangent Modulus of Elasticity in Bending b 14 days 380 000 psi 2 600 Mpa 4 Bond Strength ASTM C 882 14 days moist cure a Hardened Concrete to Hardened Concrete 2 200 psi 15 Mpa 5 Water Absorption ASTM D 570 7 day 1 50 2 hour boil 6 Tensile properties ASTM D 638 min a 7day Tensile Strength 7 900 psi 54 Mpa Elongation at Break 3 1 b 14 day Modulus of Elasticity 200 000 psi 1 400 Mpa C Properties of the mixed epoxy resin adhesive used for sealing of cracks amp porting devices 1 Pot Life Approx 60 minutes 500 gram mass 73 F 2 Tack FreeTime 75 F 24 C 1 5 2 5 hours 40 F 5 C 14 16 hours 3 Consistency Non Sag paste 4 Color Concrete Gray D Properties of the cured epoxy resin adhesive used for sealing of cracks amp porting devices 1 Compressive Strength ASTM D 695 73F a lday 13 000 psi 89 6 MPa b 3 day 14 000 psi 96 5 MPa c 28 day 16 000 psi 110 3 MPa Compressive Modulus psi min a 7 day 795 000 psi Mpa 2 Shear Strength ASTM D 732 a 7 day 4 600 psi 31 7 MPa 3
8. shall be primarily a reaction product of a selected amine blend with an epoxy resin of the diglycidiether bisphenol A Type containing suitable viscosity control agents pigments and accelerators 3 The ratio of component A componet B shall be 2 1 by volume 4 The material shall not contain asbestos B Epoxy resin adhesive for sealing of cracks amp porting devices shall be Sikadur 31 Hi Mod Gel 1 Component A shall be a modified epoxy resin of the diglycidiether bisphenol A Type or 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 diglycidiether bisphenol A Type containing suitable viscosity control agents pigments and accelerators 5 The ratio of component A componet B shall be 1 1 by volume 6 The material shall not contain asbestos C Porting devices as required for either manual or automated application Porting devices for automated application shall be supplied from maufacturer of the pressure injection equipment 2 03 Performance Criteria A Properties of the mixed epoxy resin adhesive used for the pressure injection grouting 1 Pot Life Approx 30 minutes 60 gram mass 73 F 2 Tack FreeTime 90 F 32 C 1 5 to 2 hours 75 F 24 C 3 to 3 5 hours 40 F 5 C 14 16 hours 3 Viscosity Approx 200 cps mixed 4 Color Clear pale yellow B Properties
9. til ready for use C Condition the specified product as recommended by the manufacturer 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 40 F 5 C 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 product Submittals A Submit two copies of manufacturer s literature to include Product Data Sheets and appropriate Material Safety Data Sheets MSDS Warranty A Provide a written warranty from the manufacturer against defects of materials for a period of one 1 one beginning with date of substantial completion of the project Part 2 Products 2 01 Manufacturers A Sikadur 52 as manufactured by Sika Corporation 1682 Marion Williamsport Road Marion Ohio 43302 is considered to conform to the requirements of this specification B Sikadur 31 Hi Mod Gel 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 adhesive for pressure injection of cracks shall be Sikadur 52 1 Component A shall be a modified epoxy resin of the diglycidiether bisphenol A Type or containing suitable viscosity control agents It shall not contain butyl glycidyl ether 2 Component B
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