EPOXY RESIN/PORTLAND CEMENT BONDING AGENT

EPOXY RESIN/PORTLAND CEMENT BONDING AGENT


PART 1 - GENERAL

1.1      THE REQUIREMENT

A. The Contractor shall furnish all materials and apply epoxy resin/Portland cement bonding agent in accordance with the provisions of the Contract Documents.

1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS

A. American Society for Testing of Materials (ASTM)
1.         C 109 - Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2 inch or 50 millimeter Cube Specimens).

2.         C 348 - Test Method for Flexural Strength of Hydraulic Cement Mortars.

3.         C  496  -  Test  Method  for  Splitting  Tensile  Strength  of  Cylindrical  Concrete Specimens.

4.         C 882 - Test Method for Bond Strength of Epoxy-Resin Systems Used with Concrete Slant Shear.

PART 2 - PRODUCTS

2.1      MANUFACTURERS

A.    Sika Corporation, Lyndhurst, New Jersey, Sika Armatec 110.

B. Substitutions:  The use of other than the specified product will be considered providing the Contractor requests its use in writing to the Engineer. This request shall be accompanied by:

1. A certificate of compliance from an approved independent testing laboratory that the proposed substitute product meets or exceeds specified performance criteria, tested in accordance with the specified test standards.

2. Documented proof that the proposed substitute product has a one year proved record of performance of bonding Portland cement mortar/concrete to hardened Portland cement mortar/concrete, confirmed by actual field tests and five successful installations that the Engineer can investigate.

2.2      PERFORMANCE CRITERIA

A.         Properties of the Mixed Epoxy Resin/Portland Cement Adhesive

1.         Pot Life: 75-105 minutes.
2.         Contact Time: 24 hours.
3.         Color: Dark gray.

B.         Properties of the Cured Epoxy Resin/Portland Cement Adhesive

1. Compressive strength in accordance with ASTM C 109.
a. 1 day: 810 pounds per square inch minimum.
b.         7 day: 6,000 pounds per square inch minimum.
c.          28 day: 8,000 pounds per square inch minimum.

2. Splitting tensile strength in accordance with ASTM C 496
a. 28 days: 540 pounds per square inch minimum.

3.         Flexural Strength:  1,100 pounds per square inch minimum in accordance with ASTM C 348.

4.         Bond strength in accordance with ASTM C 882 modified at 14 days.
a.         0 Hours Open Time:  1,900 pounds per square inch minimum.
b.         24 Hours Open Time:  1,500 pounds per square inch minimum.

5.         The epoxy resin/Portland cement adhesive shall not produce a vapor barrier.

6. Material must be proven to prevent corrosion of reinforcing steel when tested under  the  procedures  as  set  forth  by  the  Federal  Highway  Administration Program Report Number FHWA/RD86/193. Proof shall be in the form of an independent testing laboratory corrosion report showing prevention of corrosion of the reinforcing steel.

2.3      MATERIALS

A.         Epoxy Resin/Portland Cement Adhesive

1. Component  "A"  shall  be  an  epoxy  resin/water  emulsion  containing  suitable viscosity control agents. It shall not contain butyl glycidyl ether.

2.         Component "B" shall be primarily a water solution of a polyamine.

3.         Component "C" shall be a blend of selected Portland cements and sands.

4.         The material shall not contain asbestos.

PART 3 - EXECUTION

3.1      MIXING AND APPLICATION

A. Mixing the Epoxy Resin:  Shake contents of Components "A" and Component "B". Empty all of both components into a clean, dry mixing pail. Mix thoroughly for 30 seconds with a jiffy paddle on a low-speed with 400 to 600 revolutions per minute drill. Slowly add the entire contents of Component "C" while continuing to mix for 3 minutes until uniform with no lumps. Mix only that quantity that can be applied within its pot life.

B.         Placement  Procedure:    Apply  to  prepared  surface  with  stiff-bristle  brush,  broom,  or
"hopper type" spray equipment.

1. For Hand Applications:   Place fresh, plastic concrete/mortar while the bonding bridge adhesive is wet or dry, up to 24 hours.

2. For Machine Applications:  Allow the bonding bridge adhesive to dry for 12 hours minimum.

C. Manufacturers Current Printed Literature:  Adhere to all limitations and cautions for the epoxy resin/Portland cement adhesive in the

3.2      CLEANING

A. Leave  finished  work  and  work  area  in  a  neat,  clean  condition  without  evidence  of spillovers onto adjacent areas.

END OF SECTION