Section 03931 EPOXY INJECTION SYSTEM

Section 03931

EPOXY INJECTION SYSTEM

PART 1 GENERAL

1.1 SUMMARY

_{A. Section Includes:}

1. Epoxy Injection System

1.2 REFERENCES

A. American Society for Testing and Materials (ASTM):

1. D638, Standard Test Method for Tensile Properties of Plastics.

2. D695, Standard Test Method for Compressive Properties of Rigid Plastics.

3. D790, Standard Test Methods for Flexural Properties of Unreinforced and

Reinforced Plastics and Electrical Insulating Materials.

1.3 SUBMITTALS

A. Product Data: Submit manufacturer's data completely describing epoxy injection system materials.

B. Quality Control Submittals:

1. Certificates of Compliance.

2. Manufacturer's Instructions.

PART 2 PRODUCTS

2.1 MATERIALS

A. Manufacturers: One of the following Or Equal:

1. Master Builders, Inc., Concresive Standard LVI.

2. Sika Chemical Corp.'s, Sikadur 35, Hi-Mod LV. B. Epoxy:

1. Provide epoxy materials that are new and use them within shelf life limitations set forth by manufacturer.

2. Water-insensitive 2 part type low viscosity epoxy adhesive material containing

100 percent solids and meeting or exceeding following characteristics when tested in accordance with standards specified:

P hysical Characteristic	Test Method	Required Results
Tensile Strength	ASTMD 638	8,000 pounds per square inch at 14 days and 77 degrees F cure.
Flexure Strength	A STMD790	11,000 pounds per square inch at 14 days and 77 degrees F cure.
Compressive Strength	AS TMD 695	16,000 pounds per square inch at 24 hours and 77 degrees F cure.
Bond Strength	-	Concrete shall fail before failure of epoxy.
Gel Time for 5 Mil Film	--	4 hours maximum at 77 degrees F.
Elongation	AS TMD 638	1 percent minimum at 14 days and 77 degrees F.

2.2 EQUIPMENT

A. Pump Unit:

1. Furnish unit to be used for injection that is positive displacement type with interlock to provide in-line mixing and metering system for 2 component epoxy.

2. Furnish pressure hoses and injection nozzle of such design as to allow proper mixing of 2 components of epoxy.

3. Presence of standby injection unit may be required.

2.3 MIXES

A. Epoxy Injection System Materials:

1. Mix epoxy in accordance with manufacturer's installation instructions.

2. Do not use solvents to thin epoxy system materials introduced into cracks or joints.

PART3 EXECUTION

3.1 PREPARATION

A. Surface Preparation:

1. Epoxy Injection System:

a. General: Before processing, sweep or clean area in vicinity of crack location to receive epoxy and leave in generally clean condition.

b. Joints to Receive Epoxy: Clean in manner such that joints are free from dirt, laitance, and other loose matter.

3.2 INSTALLATION

A. Install and cure epoxy materials in accordance with manufacturer's installation instructions.

B. Perform and conduct work of this section in neat orderly manner. C. Epoxy Injection System:

1. Apply adequate surface seal to crack or joint to prevent escape of epoxy.

2. Establish entry points at distance along seal not less than thickness of cracked member.

3. Force epoxy into crack at first port with sufficient pressure to advance epoxy to adjacent port.

4. Seal original port and shift entry to port at which epoxy appears.

5. Continue this manner of port-to-port injection until each joint has been injected for its entire length.

6. For small amounts, or where excessive grout pressure developed by pump unit might further damage structure, premixed material and hand caulking gun may be used if acceptable to the ENGINEER.

7. Seal ports, including adjacent locations where epoxy seepage occurs, as necessary to prevent drips or run out.

8. After epoxy injection is complete, remove surface seal material and refinish concrete in area where epoxy was injected to match existing concrete.