Macroscopic and microscopic fracture features of concrete used in coal mine under chlorine salt erosion

Li Bing; Yin Huiguang; Mao Xianbiao; Li Yan; Zhang Lianying; Liu Ruixue; Qiu Peitao

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Macroscopic and microscopic fracture features of concrete used in coal mine under chlorine salt erosion

机译：氯盐侵蚀下煤矿用混凝土的宏观和微观断裂特征

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摘要

The microscopic morphology and pore structure characteristics of concrete with composite admixtures(fly ash and mineral powder) after chlorine salt erosion were analyzed via scanning electron microscopy(SEM) and mercury injection porosimetry(MIP), providing the basis for the design and maintenance of concrete shafts in coal mines. The above-mentioned characteristics were compared with the macroscopic characteristic of concrete fractures under uniaxial compression. The results show that the macroscopic fracture characteristics of concrete under uniaxial compression change from longitudinal split fracture and oblique section shear fracture to conjugate cant fracture, and the degree of breakage increases.Interface cracks, cement paste cracks, spherical surface cracks, and aggregate cracks appear in concrete under uniaxial compression. In the early stages of corrosion, the original cracks which are obvious are repaired. When the corrosion becomes more serious, cement paste cracks appear, and the number of harmful holes increases while the number of harmless holes decreases. This study also reveals the relationship between the macroscopic properties and microscopic structure of concrete under chloride salt erosion. Finally, the paper preliminarily discussed the relationship between the macroscopic properties and mesoscopic characteristics of concrete under chlorine salt erosion.

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来源
《矿业科学技术学报：英文版》 |2016年第003期|P.455-459|共5页
作者
Li Bing; Yin Huiguang; Mao Xianbiao; Li Yan; Zhang Lianying; Liu Ruixue; Qiu Peitao;
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作者单位

State Key Laboratory of Geomechanics and Deep Underground Engineering, China University of Mining ＆ Technology;

School of Civil Engineering, Xuzhou Institute of Technology;

School of Mechanics ＆ Civil Engineering, China University of Mining ＆ Technology;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 CHI
中图分类混凝土的养护、拆模及缺陷的补救;
关键词
混凝土裂缝; 宏观性能; 断裂特征; 微观形貌; 盐侵蚀; 煤矿用; 扫描电子显微镜; 氯;

机译：混凝土裂缝;宏观性能;断裂特征;微观形貌;盐侵蚀;煤矿用;扫描电子显微镜;氯;

Macroscopic and microscopic fracture features of concrete used in coal mine under chlorine salt erosion

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