珠江三角洲水资源配置工程自密实混凝土配合比优化设计试验研究  

Experimental Study on Optimization Design of Self-compacting Concrete Mix Proportion in A Water Resource Project

作　　者：王辉 马嘉均 吕淼 蔡升宇 张武[3] WANG Hui;MA Jia-jun;LV Miao;CAI Sheng-yu;ZHANG Wu(School of Civil Engineering,North China University of Technology,Beijing 100144,China;State Key Laboratory of Hydro Science and Engineering,Tsinghua University,Beijing 100084,China;Guangdong Hydropower Planning&Design Institute,Guangzhou 510635,China)

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]清华大学水沙科学与水利水电工程重点实验室,北京100084 [3]广东省水利电力勘测设计研究院,广东广州510635

出　　处：《水电能源科学》2021年第4期125-128,共4页Water Resources and Power

基　　金：北京市属高校基本科研业务费(110052971921/059);珠江三角洲水资源配置工程科研项目(WW2018231)。

摘　　要：自密实混凝土工作性能对原材料的波动较为敏感,工程应用中往往需要对实验室给出的自密实混凝土配合比进行优化设计。通过试验研究了砂率、石子掺量、粉煤灰掺量对自密实混凝土工作性能的影响。试验结果表明,过大或过小的砂率都会对自密实混凝土的工作性能产生不利影响;当石子粒径较小时,可考虑增大石子用量;在变换粉煤灰掺量时,应根据原材料情况调整水的用量及减水剂的掺用量。在保持满足工作性能要求的基础上,通过调整石子和粉煤灰掺量对自密实混凝土的配合比进行优化设计,为自密实混凝土配合比优化设计提供参考和建议。The working performance of self-compacting concrete(SCC)is sensitive to the fluctuation of materials.In engineering applications,the design of the mix proportion often needs to be optimized.In this paper,the influence of sand ratio,gravel content and fly ash(FA)content on the working performance of SCC were studied through experiments.The test results show that there is a negative impact on the performance of SCC when the sand radio is too big or too small.When the gravel is with a small size,the gravel content can be increased.When changing FA content,water content and the dosage of super plasticizer should be adjusted according to the parameter of materials.On the premise that the working performance meets the requirements,the mix proportion of SCC is optimized by adjusting the amount of stone and fly ash,which can provide reference and suggestion for optimization design of SCC mix proportion.

关 键 词：自密实混凝土 工作性能 配合比优化 石子掺量 砂率 粉煤灰掺量 经济性 

分 类 号：TU375.1[建筑科学—结构工程]