新疆大石峡水利枢纽工程抗冲耐磨混凝土配合比试验研究  

Experimental Study on Mix Proportion of Impact-resistant and Wear-resistant Concrete for Dashixia Water Control Project in Xinjiang

作　　者：高建福 钱国文 刘利 褚浩羽 沈伟 胡海明 GAO Jianfu;QIAN Guowen;LIU Li;CHU Haoyu;SHEN Wei;HU Haiming(China Gezhouba Group Municipal Engineering Co.,LTD,Yichang,Hubei 443000,China;Dashixia Water Control Project Construction Management Bureau,Tarim River Basin,Xinjiang Uygur Autonomous Region,Korla 841000,China;NHRI R&D Tech Group Co.,Ltd.,Nanjing 210029,China)

机构地区：[1]中国葛洲坝集团市政工程有限公司,湖北宜昌443000 [2]新疆维吾尔自治区塔里木河流域大石峡水利枢纽工程建设管理局,新疆库尔勒841000 [3]南京水科院瑞迪集团有限公司,南京210029

出　　处：《西北水电》2023年第6期30-36,48,共8页Northwest Hydropower

基　　金：国家重点研发计划项目(2018YFC0406702)。

摘　　要：抗冲耐磨混凝土的配合比设计对于水利枢纽工程的长期运营具有重要意义。基于大石峡水利枢纽泄洪系统工程,考虑混凝土水胶比、粗骨料级配、砂率和单位用水量等因素对坍落度的影响进行研究,并结合混凝土28 d和90 d的抗压强度进行分析,提出了适用于该工程抗冲耐磨混凝土(C9055W8F300、C9050W8F300、C40W8F200)的配合比设计方案,最后选取C9055W8F300等级的混凝土进行了抗冲磨试验研究。结果表明:3种抗冲耐磨混凝土的水胶比分别为0.31、0.33和0.36;粉煤灰掺量可为25%,硅灰掺量可为5%,粗骨料级配中小石与中石的质量比可为45∶55,砂率可为34%,用水量可为130 kg/m^(3);在C9055W8F300强度等级下,“硅粉+聚丙烯纤维混凝土”抗冲磨性能最好。该方法为大石峡水利枢纽工程抗冲耐磨混凝土的配合比设计提供了指导,可为类似工程提供思路和参考。The mix design of impact-resistant and wear-resistant concrete is of great significance for the long-term operation of water conservancy projects.Based on the flood discharge system of the Dashixia Water Control Project,the influence of water-binder ratio of concrete,coarse aggregate gradation,sand ratio and unit water consumption on slump is studied,and the compressive strength of concrete for 28 d and 90 d is analyzed,and the mix design scheme of impact-resistant and wear-resistant concrete(C9055W8F300,C9050W8F300,C40W8F200)suitable for this project is put forward,finally,C9055W8F300 grade concrete is selected to carry out the experimental study on abrasion resistance.The results show that the water-binder ratios of three kinds of impact-resistant and wear-resistant concrete are 0.31、0.33 and 0.36 respectively.The content of fly ash can be 25%,the content of silica fume can be 5%,the mass ratio of small stone to medium stone in coarse aggregate gradation can be 45:55,the sand ratio can be 34%,and the water consumption can be 130 kg/m^(3).Under the strength grade of C9055W8F300,"silica fume+polypropylene fiber concrete"has the best abrasion resistance.This method provides guidance for the mix design of impact-resistant and wear-resistant concrete in the Dashixia Water Control Project,and can also provide ideas and references for similar projects.

关 键 词：水利枢纽工程 混凝土 抗冲耐磨 水胶比 砂率 

分 类 号：TV431[水利工程—水工结构工程]