微生物灌浆修复混凝土竖向裂缝的试验研究
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- 英文论文题名：Experimental Investigation on Bioremedying Technology in Sealing Concrete Vertical Crack
- 论文作者：贾强 ; 陈晓瀚 ; 张鑫
- 英文论文作者：JIA Qiang ; CHEN Xiaohan ; ZHANG Xin ; School of Civil Engineering ; Shandong Jianzhu University ; Shandong Provincial Key Laboratory of Appraisal and Retrofitting in Building Structures
- 年：2016
- 作者机构：山东建筑大学土木工程学院;山东建大工程鉴定加固研究所;
- 论文关键词：混凝土裂缝 ; 微生物 ; 堵漏 ; 竖缝
- 英文论文关键词：concrete cracks ; microbe ; seal ; vertical crack
- 会议召开时间：2016-11-18
- 会议录名称：第一届先进材料前沿学术会议论文集（《材料导报》2016年第30卷第Z1期）
- 语种：中文
- 分类号：TU755.7
- 学会代码：CLDB
- 会议名称：第一届先进材料前沿学术会议
- 会议地点：中国陕西西安
- 主办单位：《材料导报》杂志社
- 学会名称：材料导报编辑部
- 页数：4
- 文件大小：675k
- 原文格式：O
- 会议级别：全国
摘要
利用微生物的酶化作用诱导碳酸钙沉积是封堵混凝土竖向裂缝的有效方法。采用正交试验的方法设计了9组混凝土试件,选取不同裂缝内壁粗糙度、裂缝深度、不同钙源溶液和是否通氧气等4项影响参数进行对比试验。对试件微生物灌浆后,发现裂缝的渗水量不断减少,而缝内碳酸钙的沉积高度不断增加。通过对封堵裂缝灌浆次数的正交分析可知,裂缝内壁的粗糙度和裂缝深度是影响封堵效果的重要因素,裂缝越粗糙(劈裂裂缝)、裂缝越深,越容易封堵。钙源种类和是否通氧气对封堵效果的影响较小。通过观察切开封堵后的试件断面可知,碳酸钙沿裂缝水平方向呈现中间较密实,两端疏松的特点;沿竖向呈现中、下部密实,上部疏松的特点。
Enzymatic effect of microbe can opportunely induce calcium carbonate to precipitation,and this precipitation could be a new efficacious way to seal the vertical cracks of concrete structures.The effects of four parameters,namely crack roughness,crack depth,type of calcium solution and oxygen supplying environment were investigated by nine orthogonal designed concrete specimens.The experimental results indicated that the water penetration velocity decreased and the height of calcium carbonate precipitation increased after concrete specimens grouted.The roughness and depth of crack were the key factors for sealing performance.The crack sealing performance increased significantly with the roughness and depth increasing.Additionally,the other two parameters,type of calcium solution and oxygen supplying environment had little effect on crack sealing performance.The specimen section showed the distribution of calcium carbonate precipitation in the crack.It was dense in the middle of crack in horizontal direction,while in vertical direction,calcium carbonate precipitation was dense in the range from the middle to the bottom of the crack.
Enzymatic effect of microbe can opportunely induce calcium carbonate to precipitation,and this precipitation could be a new efficacious way to seal the vertical cracks of concrete structures.The effects of four parameters,namely crack roughness,crack depth,type of calcium solution and oxygen supplying environment were investigated by nine orthogonal designed concrete specimens.The experimental results indicated that the water penetration velocity decreased and the height of calcium carbonate precipitation increased after concrete specimens grouted.The roughness and depth of crack were the key factors for sealing performance.The crack sealing performance increased significantly with the roughness and depth increasing.Additionally,the other two parameters,type of calcium solution and oxygen supplying environment had little effect on crack sealing performance.The specimen section showed the distribution of calcium carbonate precipitation in the crack.It was dense in the middle of crack in horizontal direction,while in vertical direction,calcium carbonate precipitation was dense in the range from the middle to the bottom of the crack.
引文
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8 Jis Qiang,Chen Xiaohan,Sun Zengbin,et al.The raising calcite yield experiment for bacterial induced precipitation[J]J Shandong Jianzhu University,2015,30(5):423(in Chinese).贾强,陈晓瀚,孙增斌,等.微生物诱导沉积碳酸钙提高产量的试验研究[J].山东建筑大学学报,2015,30(5):423.
9 Jiang Huan.Experimental study on seepage prevention and plugging by microbial-induced calcium carbonate deposition[D].Ji'nan:Shandong Jianzhu University,2014(in Chinese).姜欢.微生物诱导碳酸钙沉积防渗堵漏的试验研究[D].济南:山东建筑大学,2014.
2 Li Jiaxue,Huang Jinjun,LuoPingya,et al.Technology of controlling loss by drilling-in slugging for fracture formation[J].J Basic Sci Eng,2012,20(l):21(in Chinese).李家学,黄进军,罗平亚,等.裂缝地层随钻段塞止漏技术[J].应用基础与工程科学学报,2012,20(1):21.
3 Boquet E,Boronat A,Ramos-Cormenzana A.Production of calcium carbonate crystals by soil bacteria is a common phenomenon[J].Nature,1973,45:527.
4 Maaike Blauw,Vera van Beek,Willem van der Zon,et al.Bio-sealing,a biological sealing method for ground,is induced by mechanical weathering of ground particles due to fermentation[C]//Proceedings of 1st International Conference BGCE,Netherlands:TU Delft,2008:14.
5 Li Rongzhong,Islam M R.A new type of bio-remedying experimental research[J].Foreign Oilfield Eng,1998(4):12(in Chinese).Li Rongzhong,Islam M R.一种新型微生物封堵工艺的实验研究[J].国外油田工程,1998(4):12.
6 Qian Chunxiang,Li Ruiyang,Pan Qingfeng,et al.Microbial selfhealing effects of concrete cracks[J].J Southeast University:Nat Sci Ed,2013,43(2):360(in Chinese).钱春香,李瑞阳,潘庆峰,等.混凝土裂缝的微生物自修复效果[J].东南大学学报:自然科学版,2013,43(2):360.
7 Jia Qiang,Zhang Xin,Hou Hongtao,et al.Field experiment of crack repair by microbiological precipitation of CaCO_3[J].J Build Mater,2013,16(4):667(in Chinese).贾强,张鑫,侯宏涛,等.微生物沉积碳酸钙修复混凝土裂缝的现场试验[J].建筑材料学报,2013,16(4):667.
8 Jis Qiang,Chen Xiaohan,Sun Zengbin,et al.The raising calcite yield experiment for bacterial induced precipitation[J]J Shandong Jianzhu University,2015,30(5):423(in Chinese).贾强,陈晓瀚,孙增斌,等.微生物诱导沉积碳酸钙提高产量的试验研究[J].山东建筑大学学报,2015,30(5):423.
9 Jiang Huan.Experimental study on seepage prevention and plugging by microbial-induced calcium carbonate deposition[D].Ji'nan:Shandong Jianzhu University,2014(in Chinese).姜欢.微生物诱导碳酸钙沉积防渗堵漏的试验研究[D].济南:山东建筑大学,2014.