Experiment on microbial grouting reinforcement of tailings under the regulation of egg white
Experiment on microbial grouting reinforcement of tailings under the regulation of egg white
复制标题
蛋清调控尾矿微生物注浆加固试验
DOI：
10.1016/j.sandf.2020.07.004
复制
发表时间：
2020-08
影响因子：
3.7
通讯作者：
Gui-cheng He
中科院分区：
文献类型：
--
作者：
Huai-miao Zheng;Ling-ling Wu;Kai-wen Tong;De-xin Ding;Zhi-jun Zhang;Qing Yu;Gui-cheng He
微生物诱导碳酸钙沉淀法（MICP）存在碳酸钙结晶转化率低、尾矿强度性能不足等缺点。本文提出了软模板碳酸钙矿化技术与微生物注浆加固技术相结合的改良方法。采用9种不同浓度（0%、5%、10%、15%、20%、30%、40%、60%和80%）的鸡蛋白色对尾矿进行固化试验。经过14天的注浆加固试验，结果如下。①尾矿的抗剪强度得到显著提高，其中添加5%的白色效果最好。与对照组相比，尾矿的有效粘聚力提高了437.61%。②尾矿中碳酸钙含量与其凝聚力之间的拟合曲线表明，两者之间存在指数关系。③显微镜检查结果表明，随着鸡蛋白色浓度的增加，铌铁矿型碳酸钙所占比例增加。相应的蛋清中方解石型碳酸钙的白色浓度为5%。此时，最大粒径可达100 µ m。③尾矿孔间胶结物的红外吸收特征曲线表明，碳酸钙的晶型、晶体形貌和粒度的变化可能是由于白色与碳酸钙晶体组成中的N单键H、C单键H和C双键O等极性基团之间的强烈相互作用所致。纤维在蛋白白色中的粘结、连接和包装将引起尾矿粘结方式的根本变化。试验结果表明，鸡蛋白色矿化调节与MICP技术相结合，可实现优势互补，对提高尾矿坝的稳定性和安全性具有重要的工程意义。
Microbial Induced Calcium Carbonate Precipitation (MICP) has some disadvantages, such as low crystallization conversion rate of calcium carbonate and insufficient strength properties of tailings. In this paper, a modified method combining soft template calcium carbonate mineralization technology with microbial grouting reinforcement technology was proposed. The tailings solidification was studied with the control of nine different concentrations of egg white (0%, 5%, 10%, 15%, 20%, 30%, 40%, 60% and 80%). After 14 days of grouting reinforcement experiment, the results are as follows. ① The shear strength of tailings was improved remarkably, and the best reinforcement effect was at 5% egg white. Compared with the control group, the effective cohesion of tailings increased by 437.61%. ② The fitting curve between the content of calcium carbonate in tailings and its cohesion shows that there is an exponential relationship between them. ③ The results of microscopic examination showed that the proportion of columbite-type calcium carbonate increased with the increase of egg white concentration. The corresponding egg white concentration of calcite-type calcium carbonate was 5%. At this time, the maximum particle size could reach 100 µm. ④ The infrared absorption characteristic curves of the interporous cements of tailings indicate that the changes of crystal form, crystal morphology and particle size of calcium carbonate may be due to the strong interaction between polar groups such as Nsingle bondH, Csingle bondH and Cdouble bondO in the composition of egg white and calcium carbonate crystal. ⑤ The bonding, connecting and packaging of fibers in egg white will cause fundamental changes in the bonding mode of tailings. The test results showed that the combination of mineralization regulation of egg white and MICP technology can achieve complementary advantages, which is of great engineering significance for improving the stability and safety of tailings dam.
登录
查看更多内容
影响因子：
3.6
作者：
Aamir Mahawish;A. Bouazza;W. Gates
通讯作者：
Aamir Mahawish;A. Bouazza;W. Gates
影响因子：
2.2
作者：
Ng Wei Soon;Lee Min Lee-Lee-Min-Lee-1390782330;T. C. Khun;Hii Siew Ling
通讯作者：
Ng Wei Soon;Lee Min Lee-Lee-Min-Lee-1390782330;T. C. Khun;Hii Siew Ling
影响因子：
2.3
作者：
Whiffin, Victoria S.;van Paassen, Leon A.;Harkes, Marien P.
通讯作者：
Harkes, Marien P.
DOI：
10.9790/1684-140306100105
发表时间：
2017-06
期刊：
IOSR Journal of Mechanical and Civil Engineering
影响因子：
--
作者：
S. Pusadkar;Rewati N. Tawalare;A. I. Dhatrak
通讯作者：
S. Pusadkar;Rewati N. Tawalare;A. I. Dhatrak
影响因子：
1.5
作者：
Qian Chun-xiang;Wang An-hui;Wang Xin
通讯作者：
Wang Xin