%0 Journal Article
%A LI Zhi-bin
%A LIU Li-jiao
%A HUANG Shuai
%A DING Lin
%A LIU Yan-jie
%T Investigation on Carbonated Lime-Ash Solidified Frozen Soil and Damage Constitutive Model
%D 2024
%R 10.11988/ckyyb.20230234
%J Journal of Yangtze River Scientific Research Institute
%P 118-125
%V 41
%N 7
%X In engineering projects of cold regions, the salt-freezing coupling effect often exacerbates the strength degradation of saline soil. We aim to investigate the variations in compressive performance of lime-and-flyash-solidified carbonate soil under freezing conditions. With curing agent dosage, temperature, and loading rate as influencing parameters, we conducted unconfined compression tests on lime-and-flyash-solidified carbonate saline soil and subsequently proposed a damage constitutive model considering temperature and loading rate. Results indicate that lime and fly ash significantly enhance the compressive strength of carbonate soil, altering its stress-strain curve from weak strain softening to distinct strain softening. Optimal curing occurs with the addition of 3% lime and 12% fly ash. Temperature and loading rate markedly affect the compressive strength and elastic modulus of the solidified carbonate soil, with their relationship being expressed as a nonlinear function. Temperature exerts far more larger influence on compressive strength than curing agent dosage and loading rate. The established damage model effectively captures the stress-strain relationship and the variation trend of soil damage variables.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20230234