洞渣花岗岩混凝土配合比设计优化研究  

Study on optimization of concrete mix ratio of cavern slag and granite

作　　者：孙小磊 SUN Xiaolei(Research and Development Center on Technology and Equipment for Energy Conservation and Environmental Protection of Highway Transport,Anhui Transport Consulting&Design Institute Co.,Ltd.,Hefei 230088,China)

机构地区：[1]安徽省交通规划设计研究总院股份有限公司,公路交通节能环保技术交通运输行业研发中心,安徽合肥230088

出　　处：《交通科学与工程》2024年第1期36-44,共9页Journal of Transport Science and Engineering

摘　　要：为研究隧道洞渣以不同强度等级花岗岩为骨料的混凝土最优配合比,以无岳高速WYTJ-07标段的隧道为例,研究其在开挖过程中产生的变质花岗岩洞渣,并将其加工成机制碎石和机制砂。通过改变花岗岩混凝土的水胶比和减水剂的掺量,进行两因素三水平的全面试验,优化洞渣花岗岩混凝土配合比。研究结果表明:无岳隧道洞渣中的变质花岗岩可以用于混凝土的配制;对于C15、C20、C25、C30、C40、C50的花岗岩混凝土,最优的水胶比分别为0.54、0.50、0.47、0.43、0.39、0.33,且减水剂掺量不低于1.0%。In order to study the optimal mix ratio of different strength grades of slag granite concrete,the metamorphic granite slag produced during the tunnel excavation of WYTJ-07 section of Wuyue high-speed project was selected to make machine-made gravel and machine-made sand.Taking the tunnel of the WYTJ-07 section of the Wuyue Expressway as an example,the metamorphic granite slag produced in the excavation process was processed into machine-made gravel and machine-made sand.By changing the water-binder ratio and water reducing agent of granite concrete,the mixture ratio of slag granite concrete was optimized through two-factor and three-level comprehensive experiment.The results show that the slag of metamorphic granite of Wuyue tunnel can be used for concrete composition.The optimal water-binder ratios of the C15,C20,C25,C30,C40 and C50 slag granite concrete are 0.54,0.50,0.47,0.43,0.39 and 0.33,respectively,and the dosage of water reducing agent should higher than 1.0%.

关 键 词：变质花岗岩 混凝土 配合比优化 骨料粒径 外加剂 

分 类 号：U454[建筑科学—桥梁与隧道工程]