胶凝砂砾石配合比设计及工程特性研究-水工结构工程专业论文.docxVIP

三峡大学硕士学位论文 三 峡 大 学 硕 士 学 位 论 文 II万方数据 II 万方数据 内 容 摘 要 胶凝砂砾石坝是一种新的筑坝技术，这种坝抗震安全性高、地基适应性好、施 工速度快、造价低、对环境的破坏和干扰小，已被国内外数个实际工程所证明。它 使用的筑坝材料为胶凝砂砾石材料，该材料本质上是一种贫碾压混凝土，也被称为 Hardfill 材料。 胶凝砂砾石材料做为一种新型筑坝材料，在国内的应用和研究较少，目前的研 究成果也不多。要想这种极具优势的新材料型能广泛运用于中国的水利建设，首先 得通过大量研究掌握胶凝砂砾石材料的配合比设计方法及工程特性。 本文通过总结国内外成果和经验，从胶凝砂砾石材料的配合比设计、物理力学 试验、工程特性以及经济性分析等方面进行了研究，具体研究内容如下： （1）从理论上分析了胶凝砂砾石材料各成分对混凝土工程特性的影响以及胶凝 砂砾石材料的配合比设计方法。 （2）通过胶凝砂砾石材料维勃稠度试验，研究了水泥用量、用水量及掺和料用 量对胶凝砂砾石材料工作度的影响。 （3）通过胶凝砂砾石材料抗压试验，研究了胶凝材料用量、水胶比、砂率对胶 凝砂砾石材料抗压强度影响。 （4）首次对胶凝砂砾石材料中以石灰石粉作为掺和料进行了试验研究，得出石 灰石粉能显著提高胶凝砂砾石材料工作度和强度的结论。 （5）分析了胶凝砂砾石材料价格，其单价可比一般混凝土低 50%～80%。 关键词：胶凝砂砾石 配合比设计 石粉 力学性能 经济性分析 PAGE III万方数据 PAGE III 万方数据 Abstract Hardfill dam is a new type of dam, as can be seen from the achievements and experiences at home and abroad, Hardfill dam has many advantages of its own, such as greater safety, shorter construction period, lower construction costs and better performance on environmental protection. The dam uses a new type of material called Hardfill, which can be considered as a less strict sense lean RCC, is a roller compacted cement sand and gravel material. As a new dam material , Hardfill material has fewer applications and research in China . The new material which has many advantages can be widely applied in Chinese water conservancy and hydropower construction, we should mastered the design method and engineering characteristics of Hardfill material through great quantity of research. This paper summarizes the achievements and experiences at home and abroad , then made a study of Hardfill material ratio design, physical and mechanical tests, the engineering characteristic and economy analysis, the specific contents are as follows. Analyzed the effect of each component on the engineering properties of concrete Hardfill materials and the design method of Hardfill material’s mixture ratio. Through the Vebe consistometer test of Hardfill materials, studied the effects of water and mineral admixture cement dosage, dosage of t