Mechanical properties and microstructure characteristics of cement solidification pollution soil from Wenzhou
Under the condition of different cement content and curing time of NaCl,grease,Pb(NO3)2 pollution in Wenzhou soft soil cement solidification processing,the strength of the soil have been improved.In order to further obtain the treatment effect of different contaminated soil during cement solidification process,unconfined compressive strength tests and microstructure studies were conducted on different cement solidified contaminated soil.The effect of pollution type,pollution content,cement content,curing time on the cement solidified soil strength characteristics was analyzed.Furthermore,the difference of the microstructure of cement solidified soil with different pollutants concentration was also analyzed.The results show that within a certain range,the NaCl concentration promotes cement solidification of the early strength;grease content makes the cement solidification soil strength reduce obviously and compressibility increase;after Pb(NO3)2was dropped into the soil,the strength of the cement solidification is reduced in general.A linear relationship appears between the strength and admixing amount.The cement solidification soil strength enhances with the increase of cement content and curing time.Scanning electron microscopy(SEM)results indicate that the increase of contaminate leads to the rise of porosity and loose structure of the solidified soils.
NETL
NSTL
万方数据
维普
