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In a western engineering,the problem how to improve crack-resistance of RCC gravity dam should be solved.From the standpoint of material,the paper explored the feasibility of improving crack-resistance of RCC with the coarse cement.The 4kinds of fineness P I 42.5cement were grounded by the same clinker and gypsum.And then 4groups of RCC were made based on three-gradation RCC design demand of C18015.The influence of cement fineness on the mechanical property,deformation performance and thermal property of RCC was studied.Finally,the crack-resistance index(K)was used to research the impact of cement fineness on the general crack-resistance of RCC.The results show that the RCC made with coarse cement could satisfy the design demand and reach the level of fine cement;crack-resistance of RCC could be improved by coarse cement especially on the early age;crack-resistance index(K)was linearly decreased with the increase of cement fineness.Under the design requirement of RCC,the coarser the cement was,the stronger the general crack-resistance of RCC was.The technology of using coarse cement was an effective and economical measure to make up low heat crack-resistance of RCC.
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Basic Information:
DOI：10.20040/j.cnki.1000-7709.2015.07.034
China Classification Code:TV431
Citation Information:
[1]GONG Ying,GAO Jiang-lin,DING Jing-jing ,et al.Experimental Research on Coarse Cement Improving Crack-resistance of RCC[J].Water Resources and Power,2015,33(07):135-138+191.DOI:10.20040/j.cnki.1000-7709.2015.07.034.
Fund Information:
国家自然科学基金委员会、二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(50539040); 水利部公益性行业科研专项经费项目(200701014)
2015-07-25
2015-07-25