A performance study of high-strength microbial mortar produced by low pressure grouting for the reinforcement of deteriorated masonry structures
A performance study of high-strength microbial mortar produced by low pressure grouting for the reinforcement of deteriorated masonry structures
复制标题
低压注浆高强微生物砂浆加固劣化砌体结构的性能研究
DOI：
10.1016/j.conbuildmat.2012.12.055
复制
发表时间：
2013-04
影响因子：
7.4
通讯作者：
程晓辉
中科院分区：
文献类型：
--
作者：
杨钻;程晓辉
微生物灌浆加固修复砌体结构劣化包括向现有颗粒系统孔隙中注入微生物和营养液(胶结液)，以诱导产生的碳酸钙胶结形成一定强度的微生物砂浆。当石灰、水泥和环氧树脂等传统灌浆材料不能使用时，可以使用微生物灌浆加固。本文在试验研究的基础上，探讨了影响微生物砂浆强度的主要生化因素。此外，还确定了高强微生物砂浆的配合比和实验室制备方法。成功制备了不同强度的微生物砂浆，其最大单轴抗压强度达到55 Mpa。测试了微生物砂浆的单轴抗压强度、劈拉强度、循环荷载下的抗压强度和单轴压缩疲劳强度，分析了碳酸盐胶结的晶体结构和微生物砂浆的孔径分布。结果表明，这种新型材料在强度、变形和耐久性方面均优于普通水泥-石灰砂浆。这种新型灌浆技术是劣化砌体结构就地加固的理想选择。报道了高强微生物砂浆的制备方法、材料的力学性能测试及灌浆参数之间的定量关系。这种材料为加固破损的砖石结构，特别是历史悠久的砖石结构提供了一种新的方法。
Microbial grouting reinforcement to repair the deterioration of masonry structures involves injecting microorganisms and nutrient solution (a cementation solution) into existing granular system pores to induce the generated calcium carbonate cementation to form a microbial mortar of certain strength. Microbial grouting reinforcement is used when traditional grouting materials, such as lime, cement and epoxy, cannot be employed. In this paper, based on experimental study, the main biochemical factors that affect microbial mortar strength were investigated. In addition, the mixture ratio and laboratory preparation method for high-strength microbial mortars were determined. Microbial mortars of different strengths were successfully produced, through which the maximum uniaxial compressive strength reached 55MPa. The mechanical properties of the microbial mortar, such as uniaxial compressive strength, splitting tensile strength, compressive strength under cyclic loading and uniaxial compressive fatigue, were tested, and the crystal structure of the carbonate cementation and pore-size distribution of the microbial mortar were analyzed. The results indicate that in strength, deformation and durability, this new material is superior to conventional cement–lime mortar. This new type of grouting is ideal for the in situ reinforcement of deteriorated masonry structures. The preparation method for high-strength microbial mortar, the material’s tested mechanical properties and the quantitative relationships of the material’s grouting parameters are reported. The material provides a novel method to reinforce deteriorated masonry structures, particularly historical masonry structures.
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DOI：
10.1061/41165(397)412
发表时间：
2011-03
期刊：
--
影响因子：
--
作者：
Zuan Yang;X. Cheng;Meng Li
通讯作者：
Zuan Yang;X. Cheng;Meng Li
DOI：
10.1515/rbm-2001-5580
发表时间：
2000-05
期刊：
--
影响因子：
--
作者：
F. V. Rickstal
通讯作者：
F. V. Rickstal
影响因子：
11.4
作者：
Jingyao Cao;D. Chung
通讯作者：
Jingyao Cao;D. Chung
影响因子：
4.4
作者：
Rodriguez-Navarro, C;Rodriguez-Gallego, M;Gonzalez-Muñoz, MT
通讯作者：
Gonzalez-Muñoz, MT
影响因子：
3.8
作者：
Oliveira, D. V.;Lourenco, P. B.;Roca, P.
通讯作者：
Roca, P.