SUPPRESSION OF SWELLING AND DETERIORATION OF FIBER-CEMENT-STABILIZED SOIL CONTAINING SUPER ABSORBENT POLYMER USING FERRIC CHLORIDE

Abstract

 A super absorbent polymer has attracted attention as a technology for quick removal of weak disaster soil from the disaster site. While the removed soil should be modified and reused as a ground material by the Fiber-cement stabilized soil method, there is a concern that super absorbent polymer therein deteriorates the durability of the modified soil by absorbing and expanding. In this study, the authors quantified the effect of bonding with ferric ion on the absorption capacity of the super absorbent polymer. Additionally, the durability of the modified soil was verified by a cyclic test for drying and wetting. From the test results, it was confirmed that the super absorbent polymer contained in the modified soil can deteriorate the durability of the soil by absorbing and swelling. Besides, it was clear that the water absorption can be suppressed by bonding with ferric ion to prevent the deterioration of the modified soil.