CAJ | 학술논문

通过室内无侧限抗压强度试验和扫描电镜技术，对水泥固化稳定后的重金属镍污染土的强度特性和微观结构进行了研究。分析了不同镍离子浓度、水泥掺入量和龄期对水泥固化土强度特性的影响以及不同镍离子浓度水泥土微观结构的差异。研究结果表明：水泥固化镍污染土的强度随着龄期以及水泥掺入量的增长而提高，不同龄期的强度间大致呈线性关系。同时，分析了水泥固化镍污染土变形指标破坏应变以及E50的变化规律。随着镍离子浓度的增加，破坏应变增大， E50降低。得到了破坏应变、E50和无侧限抗压强度之间的相关关系。
통과실내무측한항압강도시험화소묘전경기술，대수니고화은정후적중금속얼오염토적강도특성화미관결구진행료연구。분석료불동얼리자농도、수니참입량화령기대수니고화토강도특성적영향이급불동얼리자농도수니토미관결구적차이。연구결과표명：수니고화얼오염토적강도수착령기이급수니참입량적증장이제고，불동령기적강도간대치정선성관계。동시，분석료수니고화얼오염토변형지표파배응변이급E50적변화규률。수착얼리자농도적증가，파배응변증대， E50강저。득도료파배응변、E50화무측한항압강도지간적상관관계。
By using a series of unconfined compression test and scanning electronic microscopy technolo -gy, the paper studied the trength characteristics and microstructure of cement solidified nickel contamina -ted soil.The effect of nickel concentration , cement content and curing time on the cement solidified soil strength characteristics was discussed .Furthermore , the influence of nickel concentration on microstruc-ture was also analyzed .The results show that the nickel concentration in soil interferes with the hydration process of cement which directly reflects the unconfined compressive strength development , stress-stain relationship and microstructure of the treated soil .The soil strength enhances with the increase of cement content and curing time .A linear relationship appears among the strength of cement treated nickel con-taminated soil at different curing times .It analyzed the variation rule of failure strain of cement solidified nickel contaminated soil and E50 .Along with the increase of nickel ion ,the failure strain increases and E50 decrease.The paper got the relationship between failure strain , E50 and unconfined compressive strength.