Study on the Influence of Curing Agent on the Water Stability of Cement-stabilized Coarse Sand
As a type of road base material,cement-stabilized coarse sand has a direct impact on the performance and durability of the pavement structure due to its water stability.In order to investigate the effect of curing agents on the water stability of cement stabilized coarse sand,five types of cement-stabilized coarse sand specimens(S6,0.04、S8,0.04、S10,0.04、S10S12)were prepared.By combining immersion test,freeze-thaw cycle test,and scanning electron microscopy test,the strength variation law and strength degradation mechanism of the unconfined compres-sive strength of the specimens were analyzed from both macroscopic and microscopic perspectives.The research re-sults show that after soaking in water for 1 day,the unconfined compressive strength of the five specimens increased to varying degrees;Under a curing age of 28 days,with the increase of freeze-thaw cycles,the unconfined com-pressive strength of the five specimens showed a variation law of reducing-increasing-reducing;When the cement content is 10％,the immersion strength and freeze-thaw resistance of the specimens with added curing agent are much higher than those without curing agent;With the number of freeze-thaw cycles increases,the connection be-tween particles of specimen S10,0.04 particle weakens,the number of pores increases,and the strength decreases.Therefore,adding a certain amount of curing agent can effectively improve the stability of cement stabilized coarse sand under immersion and freeze-thaw cycles to enhance its durability as road base materials.
国家科技期刊平台
NSTL
万方数据
