矿粉-粉煤灰-偏高岭土复合基低碳地聚合物 疏浚淤泥固化材料力学特性试验研究.

It can effectively shorten the construction period, improve the use of solid wastes and reduce carbon emissions by using the new type of low carbon geopolymer cementing material to replace ordinary high energy consumption and high consumption cement to solidify dredged silt. With mineral powder, fly ash and metakaolin are used as composition cementitious materials, and sodium silicate as activator to prepare low carbon geopolymer solidified dredged silt, an experiment and analysis of the unconfined compressive strength and compressive property of geopolymer solidified dredged silt were carried out. The results show that the combination of mineral powder and metakaolin makes up for the low early activity of fly ash. Compared with the solidified silt with 10% cement content, the unconfined compressive strength of geopolymer solidified soil with 3.5% mineral powder, 3.5% fly ash and 3% metakaolin increases by 244.1% for 7 d. The stress-strain curve shows obvious stress peaks. The carbon emission is only 15% of that of traditional cement. It has good ecological benefits and broad application prospects. The research results can provide reference for large-scale and rapid solidification disposal of dredged silt. [ABSTRACT FROM AUTHOR]