摘要
采用具有多孔结构的再生骨料载具嗜碱巴氏芽孢杆菌,制备了具有裂缝自动修复功能的混凝土,并进行了膨胀珍珠岩载体、硅藻泥载体以及无载体等情况下的修复表征对比试验.结果表明:有载体组的修复效能均优于无载体组;当修复期为28d时,再生骨料载体组的修复效果最好,裂缝修复最大宽度达到0.27mm.同时,分析了载体粒径、菌液浓度、载体占比及裂缝宽度对自修复效能的影响规律,并且基于试验结果提出了最优配合比设计方案.
The porous recycled aggregate was used as a carrier of bacillus to prepare concrete with automatic crack repair function.At the same time,based on the expanded perlite carrier,diatom mud carrier and no carrier.The comparative study of the repair characterization was carried out.The results show that the carrier group has better repair performance than the group without carrier.The specimens of the recycled aggregate carrier show the best repair effect when cracked for 28days,and the maximum width of crack repair reaches 0.27mm.At the same time,the influence of carrier particle size,bacterial liquid concentration,carrier ratio and crack width on self-healing efficiency is analyzed.Based on the test results analysis,the optimal mix ratio design scheme is proposed.
作者
刘超
吕振源
肖建庄
白国良
LIU Chao;Lü Zhenyuan;XIAO Jianzhuang;BAI Guoliang(College of Science, Xi'an University of Architecture and Technology, Xi'an 710055, China;School of Civil Engineering, Tongji University, Shanghai 200092, China;College of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2020年第6期1337-1344,共8页
Journal of Building Materials
基金
国家自然科学基金资助项目(51878546)
陕西省杰出青年科学基金项目(2020JC-46)
陕西省创新人才推进计划资助项目(2018KJXX-056)
陕西省重点研发计划项目(2018ZDCXL-SF-03-03-02)
陕西省科技创新基地资助项目(2017KTPT-19)。
关键词
再生骨料
载体种类
微生物
自修复混凝土
最优配合比
recycled aggregate
carrier type
microorganism
self-healing concrete
optimal mix ratio
