Study on the effect of exciters on the basic properties of fluid solidified soil with high dosage of alkali slag
CaO+Na2CO3(molar ratio 1∶1,called as C system),Na2SO4+ordinary silicate cement(mass ratio 2∶1,called as Z system)and anhydrous Na2SiO3(W system)were selected as solid alkali excitants to prepare alkali slag fluidized solidified soil,and to study the effects of water cement ratio and alkali dosing on the fluidity,unconfined compressive strength and microstructure of alkali slag fluidized solidified soil.The results show that:the fluidity of solidified soil increases significantly with the increase of water cement ratio,C10-0.9 can reach 204 mm with no segregation phenomenon,which is conducive to the pumping construction.The increase of alkali doping will lead to a decrease in the fluidity of the solidified soil,and the influence of the W system has the greatest change;the Z system does not have the compressive strength,and only the C and W systems have complete demolding and com-pressive strength at 10％alkali doping,compared with ordinary silicate cement,the C and W systems have a low Ca/Si value,and their C-S-H gels have a better degree of polymerization,resulting in a denser structure.
万方数据
维普
