Effect of adding glass fibers on durability to freeze-thaw cycle of epoxy resin stabilized silty sand

Abstract

It is a good practice to change the site soil properties when dealing with inappropriate soils in geotechnical engineering, referred to as soil improvement. This study investigated the effects of epoxy resin LR202 stabilizer (5 wt% of soil as an optimum percentage) and glass fibers (0 wt%, 0.4 wt% and 0.8 wt% of stabilized soil) as reinforcement on silty sand’s durability. For this purpose, the unconfined compressive strength test (12 tests), durability test (12 tests), ultrasonic pulse velocity (UPV) test (48 tests), and standard compactions test (5 tests) were performed. The results of this study showed that the addition of epoxy resin improves the durability of silty sand soil. The stabilized samples containing 5 wt% epoxy resin resisted 12 freeze-thaw cycles, and the sample behavior was enhanced by adding 0.4 wt% and 0.8 wt% fibers to the stabilized samples. Hence, the samples stabilized with epoxy resin exhibited acceptable behavior under freeze-thaw durability cycles. This indicates that epoxy resin stabilizer is appropriate in areas with possible frost and exhibits good behavior. The results of the UPV test showed that it could be used as a non-destructive test to control the durability of epoxy resin-stabilized soils.

Keywords

epoxy resin / fiber / durability / ultrasonic pulse velocity

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