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Air-formed lightweight soil is made by mixing air bubbles into cement-treated soil. The air-formed soil is a geomaterial with high rigidity and strength, so that it shows usually a brittle behavior in deformation-strength property. It is expected that the brittle behavior of the air-formed soil will be improved by mixing short fibers. In order to investigate improvement effect of the strength of air-formed lightweight soil due to mixing various types of short fibers, triaxial compression and bending tests were performed. Three kinds of short fibers are used (nylon threads, waste paper and PET short fibers). Nylon thread is used in place of waste fishing net, waste paper fiber is made by breaking into flocculate, and PET short fibers are a recycle material from waste PET bottle. Increases of residual strength and bending strength of the air-formed lightweight soil by mixing short fibers were clarified. It was also confirmed that short fibers made from waste materials is useful for improving the brittle behavior of air-formed lightweight soil. Furthermore, environmental load of the lightweight soil was evaluated from viewpoint of recycling of constriction surplus soil.
国際ジオシンセティックス学会日本支部の論文