摘要
针对实际工程对渣土处理和涵背、涵顶回填的需求,采用硅酸盐水泥分别和矿粉、粉煤灰复合作为固化剂,研究不同固化剂、不同固化剂掺量、不同水固比等条件下流态固化土强度发展规律。结果表明:流态固化土抗压强度随着试验龄期的延长而增长,相同掺量下,采用矿粉作为掺合料的流态固化土抗压强度要明显高于粉煤灰;随着掺量的增加,粉煤灰流态固化土抗压强度显著降低,28 d强度降低了13.6%,而矿粉流态固化土抗压强度具有一定程度的提高,28 d强度提高了12.6%。随着固化剂掺量增加,流态固化土抗压强度提高。随着水固比的增大,抗压强度均呈现一定程度的降低趋势。
In response to the demand for slag soil treatment and backfilling at the back and top of culverts in practical engineering,a composite of Portland cement,mineral powder,and fly ash was used as a solidifying agent.The strength development law of fluidized solidified soil under different solidifying agents,different solidifying agent dosages,and different water solid ratios was studied.The study found that the compressive strength of fluidized solidified soil increased with the extension of the test period,and under the same dosage,the compressive strength of fluidized solidified soil using mineral powder as admixture is significantly higher than that of fly ash.With the increase of dosage,the compressive strength of fly ash flowable solidified soil significantly decreases,with a decrease of 13.6%at 28 days of age.However,the compressive strength of mineral powder flowable solidified soil has been improved to a certain extent,with an increase of 12.6%at 28 days of age.It is recommended to use mineral powder as a admixture to prepare a solidifying agent for the engineering waste soil.As the dosage of solidifying agent increases,the compressive strength of fluidized solidified soil increases.As the water to solid ratio increases,the compressive strength shows a certain degree of decrease trend.
作者
赵运福
吴庆霞
ZHAO Yun-fu;WU Qing-xia(CCCC Fourth Navigation Engineering Bureau Co,Ltd,Guangzhou 510420,China;China Academy of Building Research,Beijing 100013,China)
出处
《建材世界》
2024年第3期18-21,共4页
The World of Building Materials
关键词
流态固化土
固化剂
抗压强度
水固比
硅酸盐水泥
fluidized solidified soil
solidifying agent
compressive strength
water solid ratio
Portland cement
