1、碾压混凝土的开发与应用 - I - 摘要摘要 碾压混凝土是一种干硬性贫水泥的混凝土，使用硅酸盐水泥、火山灰质掺和 料、水、外加剂、砂和分级控制的粗骨料拌制成无塌落度的干硬性混凝土，采 用与土石坝施工相同的运输及铺筑设备，用振动碾分层压实。 本课题以贵州省思林水电站大坝为依托， 研发出了适用于该电站用的碾压混 凝土。设计出了适用于该电站的合理碾压混凝土配合比和施工配合比，并对该碾 压混凝土的工作性能、力学性能及耐久性能进行了研究。试验表明：凝结时间中 初凝一般在十一小时左右，终凝一般在十四个小时左右；28 天后抗压强度最大 可以达到 17.7MPa；干缩值最大也就达到了 152.410-4；抗渗
2、等级一般达到 68 级。此结果表明此碾压混凝土符合改工程的要求。 关键关键词词：碾压混凝土 思林水电站大坝 筑坝技术 硬性贫水泥 安徽建筑工业学院本科生毕业论文 - II - Abstract RCC is a hard dry lean cement concrete, the use of Portland cement, pozzolanic admixture, water, admixtures, sand and coarse aggregate grading control made no slump mix the dry concrete , Using the same
3、transportation and dam construction and paving equipment, compaction with a vibrating roller stratification. This topic Silin Hydropower Station of Guizhou Province based, research and development applicable to the rolling of the plant mixed with Concrete.Devised for the rationality of the power sta
4、tion and construction of roller compacted concrete mix proportion, and the work of the RCC, mechanical properties and durability were studied.Results show that: setting time in general in the eleventh hour initial setting and final setting is usually in fourteen hours or so; 28 days after the maximum compressive strength of up to 17.7MPa; shrinkage will reach the maximum value of 152.4 10-4; impermeability levels generally reach6 to 8. The results show that the RCC meet the requirements of t
