Factors and Solidification Mechanisms Influencing Fluidity and Strength of Flowable Solidified Soil
SHUI Liangliang
ZHENG Xiaoguang
DAI Teng
CHEN Yajie
TAN Xuejun
Abstract：Through experiments such as fluidity tests,unconfined compressive strength tests,and microscopic analysis,the effects of soil sample characteristics,types of solidifying materials(SM),SM-to-soil ratio,water-to-solid ratio,and temperature on the fluidity and strength of flowable solidified soil were investigated,and its solidification mechanism was analyzed.The results show that the fluidity of flowable solidified soil(FSS)increases with a higher water-to-solid ratio,slightly decreases with a higher SM-to-soil ratio,and significantly decreases with smaller soil particle sizes.The strength of FSS increases with a higher SM-to-soil ratio.When using a solidifying agent,higher strength can be rapidly achieved under conditions of a high water-to-solid ratio,low SM-to-soil ratio,and low curing temperature compared to using cement.The solidification mechanism lies in the fact that the solidifying agent generates more ettringite(AFt)than cement.During its formation,AFt consumes a large amount of free water and effectively fills the gaps between soil particles.Together with calcium silicate hydrate gel,AFt cements the soil particles,enhancing the material's microscopic compactness and thereby improving the macroscopic strength of the FSS.
Keywords：flowable solidified soilfluiditycompressive strengthsolidification mechanismengineering waste soil
Publication Date：2026-02-28
Online Publishing Date：2026-04-07(First online date of this platform, not the publication date of the document)
Pages：9( 242-250 )