花岗岩洞渣制砂废粉在路基护坡混凝土中的应用研究  

Study on the Application of Granite Stone Powder in Concrete for Subgrade Slope Protection

作　　者：唐亮 曾思清 谭艳臣 李凯 常泽洲 刘坤连 杨东来 张同生[2] TANG Liang;ZENG siqing;TAN Yanchen;LI Kai;CHANG Zezhou;LIU kunlian;YANG Donglai;ZHANG Tongsheng(Poly Changda Engineering Co.,Ltd.;School of Materials Science and Engineering,South China University of Technology;Guangdong Provincial Highway Construction Group)

机构地区：[1]保利长大工程有限公司 [2]华南理工大学材料科学与工程学院 [3]广东省公路建设有限公司

出　　处：《广东建材》2025年第4期1-5,共5页Guangdong Building Materials

基　　金：建筑垃圾和道路废弃物高值利用关键技术研究及示范,广州市重点研发项目(编号:2023B03J1280).

摘　　要：探究花岗岩石粉在路基护坡混凝土作为辅助胶凝材料中的应用潜力。结果表明:随石粉含量的增加,粉煤灰含量的减少,要使混凝土坍落度增加,减水剂掺量适当增加至1.3%,且胶凝材料用量不宜低至257kg/m^(3);在满足工程路基护坡混凝土抗压强度要求的情况下,混凝土中石粉可以取代全部粉煤灰,替代水泥量不超过25%;通过优化石粉的比例、水灰比以及胶凝材料用量等因素,C20护坡混凝土的成本可降低5.5~23.4元/方。The potential application of granite powder as a supplementary cementitious material in concrete for subgrade slope protection was explored.The results indicate that to increase the slump of concrete with an increasing granite powder content and decreasing fly ash content,the admixture dosage of superplasticizer must exceed 1.3%,and the cementitious material content in this mix proportion should not be less than 257 kg/m^(3).When meeting the compressive strength requirements for subgrade slope protection concrete,granite powder can fully replace fly ash,with a recommended cement replacement ratio not exceeding 25%.By adjusting factors such as the proportion of granite powder,water/binder ratio,and cementitious material content,the cost of C20 slope protection concrete can be reduced by 5.5 to 23.4 yuan/m^(3).

关 键 词：花岗岩石粉 机制砂混凝土 配合比设计 

分 类 号：TU5[建筑科学—建筑技术科学]