2020 Volume 76 Issue 4 Pages 293-305
To quantitatively evaluate the performance of epoxy resins for crack injection in cold environment, we performed injection tests using cylindrical specimens with controlled crack widths during which the changes in viscosity and temperature of the epoxy resins were measured during the injection. This paper presents the results of the areal rate into a crack under various temperatures and injection rates.
As a result, the injection performance of epoxy resins depends on the environmental temperature inside the crack because the resin changes its temperature very little due to its chemical reaction in low temperature environments. In addition, the injection areal rate has a correction with the environmental temperatures of 5°C or less. From this correlation, it is possible to quantitatively evaluate the injection performance of epoxy resin for crack injection in cold environment at the design stage.