Study on Expansion Cracking of Hydration in Concrete Aggregates  

作　　者：霍凯成 

机构地区：[1]WuhanUniversityofTechnology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2002年第1期50-53,共4页武汉理工大学学报（材料科学英文版）

摘　　要：In accordance with a fresh accident by severe expansion cracks of structural elements , based on systematic detection and analyses such as X-ray diffraction, differential thermal analysis, scanning electron mi-croscory, chemical analysis, petrographic analysis, electronic probe analysis, and atomic absorption spectroscopy analysis, it is pointed out that the dominant reasons lie in the hydration reaction of magnesia in concrete aggregates , resulting in a volume expansion in structure members. A wholly new corresponding .strengthening method is applied to the, cracked elements and turned out to be effective.In accordance with a fresh accident by severe expansion cracks of structural elements , based on systematic detection and analyses such as X-ray diffraction, differential thermal analysis, scanning electron mi-croscory, chemical analysis, petrographic analysis, electronic probe analysis, and atomic absorption spectroscopy analysis, it is pointed out that the dominant reasons lie in the hydration reaction of magnesia in concrete aggregates , resulting in a volume expansion in structure members. A wholly new corresponding .strengthening method is applied to the, cracked elements and turned out to be effective.

关 键 词：expansion cracking MAGNESIA HYDRATION DETECTION strengthening method 

分 类 号：TU528[建筑科学—建筑技术科学]