微生物协同强化路基渣土的路用性能研究  

Study on the road performance of microbial synergistic enhancement of roadbed waste soil

作　　者：孔德玉[1] 张凯凯 聂海波 倪彤元[1] 郑忠波 陈乐也 张天翔 KONG Deyu;ZHANG Kaikai;NIE Haibo;NI Tongyuan;ZHENG Zhongbo;CHEN Leye;ZHANG Tianxiang(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Zhejiang Tian Zang Environmental Protection Technology Co.Ltd.,Lishui 323000,China;Cangnan County Construction Investment Infrastructure Co.Ltd.,Wenzhou 325800,China;Zhejiang Jian Tou Transportation Infrastructure Construction Group Co.Ltd.,Hangzhou 310005,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310023 [2]浙江天造环保科技有限公司,浙江丽水323000 [3]苍南县建投基础建设有限公司,浙江温州325800 [4]浙江省建投交通基础建设集团有限公司,浙江杭州310005

出　　处：《新型建筑材料》2025年第3期1-5,共5页New Building Materials

基　　金：浙江省“尖兵领雁”研发计划项目(2023C04042)。

摘　　要：采用细骨料填充、微生物矿化剂以及水泥(粉煤灰)协同强化路基渣土,研究在不同水泥及粉煤灰掺量下微生物矿化剂对协同强化路基渣土的路用性能影响。结果表明:微生物矿化剂的加入可以使复掺水泥+粉煤灰强化路基渣土的最大干密度增大,最佳含水率降低,7 d无侧限抗压强度提高24.35%~27.50%,28 d无侧限抗压强度提高19.28%~20.99%,水稳定系数平均提高0.1。当水泥掺量3%、粉煤灰掺量为3%时,微生物矿化剂+水泥+粉煤灰协同强化路基渣土的7 d无侧限抗压强度可达到1.8 MPa,符合二级以及二级以下公路底基层抗压强度最低要求。Using fine aggregate filling,microbial mineralizers,and cement(fly ash)to synergistically strengthen roadbed spoil,and conducting experimental research on the influence of microbial mineralizers on the road performance of synergistically strengthened roadbed spoil under different cement and fly ash dosages.The results showed that the addition of microbial mineralizers can increase the maximum dry density and decrease the optimal moisture content of roadbed spoil reinforced with cement+fly ash.The unconfined compressive strength increased by 24.35%~27.50%at 7 days,19.28%~20.99%at 28 days,and the water stability coefficient increased by 0.1.When the cement content is 3%and the fly ash content is 3%,the 7-day unconfined compressive strength of the roadbed spoil reinforced by microbial mineralizer+cement+fly ash can reach 1.8 MPa,which meets the minimum strength requirements for the subgrade layer of second grade and below highways.

关 键 词：微生物矿化剂 协同强化 路基渣土 水稳定系数 

分 类 号：TU44[建筑科学—岩土工程]