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多元胶凝粉体复合效应的研究
作者:陈改新 纪国晋 雷爱中 田军涛 
单位:中国水利水电科学研究院 结构材料研究所 中国水利水电科学研究院 结构材料研究所 中国水利水电科学研究院 结构材料研究所 中国水利水电科学研究院 结构材料研究所 北京100038  北京100038  北京100038  北京100038 
关键词:定制高性能混凝土  多元胶凝粉体  紧密堆积效应  活性叠加效应  矿物掺合料  水化热 
分类号:TU528
出版年,卷(期):页码:2004,32(3):351-357
DOI:
摘要:
在水泥中掺入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。
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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.
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基金项目:
国家自然科学基金 (5 990 90 0 8)资助项目
作者简介:
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参考文献:
[1]冯乃谦.高性能混凝土[M ].北京:中国建筑工业出版社,1996.29—32.FENGNaiqian.HighPerformanceConcrete(inChinese).Bei jing:ChinaArchitectureBuildingPress,1996.29—32. [2]胡曙光,张云升,丁庆军,等.用于高性能混凝土的胶结材浆体水化热研究[J].建筑材料学报,2000,3(3):202—206.HUShuguang,ZHANGYunsheng,DINGQingjun,etal.JBuildMater(inChinese),2000,3(3):202—206. [3]YUAB ,STANDISHN .Porositycalculationsofmulti compo nentmixturesofsphericalparticles[J].PowderTechnol,1987,52:233—240.
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