多元胶凝粉体复合效应的研究

在水泥中掺人具有不同颗粒分布和活性的细掺合料可以获得多元胶凝粉体材料。采用标准稠度用水量法和环境扫描电镜研究了多元粉体体系的紧密堆积效应。提出用标准稠度需水量比作为确定紧密堆积效应的实验方法。用水化热和抗压强度实验研究了多元胶凝粉体材料各组分的水化进程匹配和复合胶凝效应，测定了多元胶凝粉体大体积混凝土的强度和绝热温升过程。实验结果表明：改变胶凝组分的品种、含量和细度可以调控多元胶凝粉体的绝热温升和强度发展过程。以满足配置高性能混凝土的特殊技术需求。

STUDY ON SYNERGISTIC EFFECTS OF MULTI-COMPONENT CEMENTITIOUS MATERIAL

Multi-component cementitious materials can be prepared by incorporating fine blend materials with different size distribution and activity into cement. The water requirement of normal consistency of paste and ESEM (environmental scanning electron microscope) were used to study the dense-packing effect of the multi-component cementitious powder systems, and the test method of water requirement of normal consistency was proposed to determine the dense-packing effect of this system. The hydration process and synergistic effect of the multi-component cementitious were studied by the experiments of hydration heat and compressive strength. The compressive strength and adiabatic temperature of the mass concrete made of multi-component cementitious were tested. The results show that the hydration-exothermic process and the strength development could be regulated to meet the requirements of high performance concrete for hydraulic structures by varying the type, the content or the fineness of each component of the multi-component cementitious powder system.