| 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027mm.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. |
| 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 |
| DOI：103969/j.issn.1007 9629202006011 |
| 分类号: |
| 基金项目: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) |
|
| Carrier Properties of Recycled Aggregates and Its Application in Self healing Concrete |
|
LIU Chao1, L Zhenyuan2, XIAO Jianzhuang2, BAI Guoliang3
|
|
1.College of Science, Xian University of Architecture and Technology, Xian 710055, China;2.School of Civil Engineering, Tongji University, Shanghai 200092, China;3.College of Civil Engineering, Xian University of Architecture and Technology, Xian 710055, China
|
| Abstract: |
| 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 027mm. 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. |
| Key words: recycled aggregate carrier type microorganism self healing concrete optimal mix ratio |
