大掺量白云岩石粉碾压混凝土的配制及其特性研究  

Mixture design and properties of roller compacted concrete with high dolomite powder content

作　　者：戈雪良[1,2,3] 陆采荣[1,2,3] 梅国兴[1,2,3] 

机构地区：[1]南京水利科学研究院,南京210029 [2]水文水资源与水利工程科学国家重点实验室,南京210029 [3]水利部水工新材料工程技术研究中心,南京210029

出　　处：《水力发电学报》2016年第4期125-130,共6页Journal of Hydroelectric Engineering

基　　金：水利部公益性行业科研专项(201301052)

摘　　要：以我国西南地区某水电站工程为依托,将白云岩石粉作为掺合料,开展二级配、三级配碾压混凝土试配和性能试验,研究大掺量白云岩石粉技术,以及替代粉煤灰作为碾压混凝土掺合料使用的可行性。研究结果表明,经合理的配合比设计及参数优化,通过降低水胶比,并适当提高水泥用量,在50%~55%掺量范围内,能配制出强度等级为C9020的二级配和三级配碾压混凝土,且碾压混凝土的抗冻、抗渗耐久性,极限拉伸值、抗拉强度等均可满足设计要求,表明采用大掺量白云岩石粉掺合料技术配制碾压混凝土具有可行性。An experimental study of roller compacted concrete with high dolomite powder content has been conducted for design of a hydropower station in Southwest China to expound and prove the feasibility of using dolomite powder as a substitute for fly ash and a mineral admixture of such concrete. The results show that roller compacted concrete of strength grade C9020 can be prepared by using dolomite powder content in the range of 50% ~ 55%, reducing water/cement ratio, and increasing cement content, through application of reasonable mixture design and parameter optimization. Its frost resistance and permeability resistance, along with its ultimate extension and tensile strength etc., can all meet design requirements. Thus, this study has proved the feasibility of high dolomite powder content technology for mix of roller compacted concrete.

关 键 词：水工材料 碾压混凝土 白云岩石粉 掺合料 配合比 性能 

分 类 号：TV431[水利工程—水工结构工程]