Bond Strength of Anchor Epoxies According to ASTM

Introduction

This report provides a summary of the results of test performed as outlined within this document. Bond strength test was conducted following ASTM C882 – 13a. Standard Test Method for Bond Strength of Epoxy-Resin Systems Used With Concrete By Slant Shear. The specimen configuration was standard according to the standard specified. Bond strength between concrete and anchor epoxy were tested and reported.

Test Date and Location

The test was conducted in material laboratory of Shanghai Zhengniu New Material Tech., Ltd., China.

Test Operator

Cheng Tan

Description of Specimens

Specimens in this test were manufactured by Shanghai Horse Construction.

Specimens were labeled as HM500.

Two equal sections of a 75 by 150-mm portland-cement mortar cylinder were bonded together with specific epoxy resin, each section of which has a diagonally cast bonding area at a 30° angle from vertical. Mortar with a compressive strength of 60 MPa was used in this test. The mortar sections, and all equipment that will contact the resin to the temperatures specified in Specification C881/C881M.

Apparatus

A 30 kN MTS testing machine was used to conduct this test, load and displacement were recorded by the loading system.

Test Procedure

The bond strength is determined by using the epoxy system to bond together two equal sections of a 75 by 150-mm portland-cement mortar cylinder. After suitable curing of the bonding agent, the test is performed by determining the compressive strength of the composite cylinder. Specimens were tested at 23 °C in compression after capping in accordance with Test Method C39/C39M.

Test Results

The bond strength of the resin bonding system was calculated by dividing the load carried by the specimen at failure by the area of the bonded surface. Reduce the area of the bonded surface by that of any voids found in the bond on inspection after test. The area of the elliptical bonding surface of the test cylinders specified in this test method is 9116 mm2. Two specimens were tested for each type of product. Test results are summarized in Table. Bond strength and position of the fracture of each specimen are shown in Appendix.