Abstract
This paper examines the compatibility of volcanic cohesive soil as a material for use in foamed mixture lightweight soil. Since the physical and mechanical properties of volcanic cohesive soil are influenced by its allophane content, eight types of volcanic cohesive soil with different allophane contents were prepared. The results showed that the liquidity, lightweight properties, and unconfined compressive strength of the foamed mixture lightweight soil are also influenced by the allophane content. Based on these results, an equation for estimating the unconfined compressive strength in terms of the sand-cement ratio, foam-cement ratio, and allophane content is proposed.
