岩土力学2025，Vol.46Issue(5)：1573-1580,8.DOI:10.16285/j.rsm.2024.1040
聚丙烯酰胺对酶诱导碳酸盐沉淀固沙效果影响
Effect of polyacrylamide on sand solidification using enzyme-induced carbonate precipitation
摘要
Abstract
To enhance the effectiveness of the enzyme-induced carbonate precipitation(EICP)technique in solidifying aeolian sand,EICP was combined with polyacrylamide(PAM).Initially,the effects of PAM on urease activity and calcium carbonate production were examined,followed by determining the optimal PAM concentration through sand solidification tests.A wind tunnel test compared the wind erosion resistance of aeolian sand solidified by EICP and EICP+PAM,while the impacts of PAM on EICP water retention and absorption were also assessed.The results show that PAM has a minimal effect on urease activity and calcium carbonate production within the studied concentration range(0-1 g/L).As PAM concentration increases,the surface strength and crust thickness of sand specimens initially rise and then decline.When the PAM concentration is 0.6 g/L,both parameters reach their maximum,identifying 0.6 g/L as the optimal PAM concentration.The wind erosion resistance of sand solidified by EICP+PAM is superior to that of sand solidified by EICP alone.The wind erosion rate of EICP+PAM solidified sand is merely 13.28 g/(m2·min)at a wind speed of 30 m/s.Additionally,the surface crust of PAM-enhanced solidified sand provides improved water retention and long-term stability,suggesting that combining PAM with EICP technology effectively enhances the performance of solidified aeolian sand.关键词
酶诱导碳酸盐沉淀/聚丙烯酰胺/风积沙固化/表面强度/风蚀速率Key words
enzyme-induced carbonate precipitation/polyacrylamide/aeolian sand solidification/surface strength/wind erosion rate分类
土木建筑引用本文复制引用
吴林玉,缪林昌,孙潇昊..聚丙烯酰胺对酶诱导碳酸盐沉淀固沙效果影响[J].岩土力学,2025,46(5):1573-1580,8.基金项目
宁夏科学技术厅重点研发计划资助项目(No.2020BFG02014) （No.2020BFG02014）
武汉轻工大学科研资助项目(No.2024Y28).This work was supported by the Key Research and Development Program of Science and Technology Department of Ningxia(2020BFG02014)and the Research Program of Wuhan Polytechnic University(2024Y28). （No.2024Y28）
