矿物掺合料对C100～C120超高强混凝土基本性能的影响.pdfVIP

学兔兔 2012年第3期 混 凝 土与 水 泥 制 品 2012 No．3 3月 CHINA CONCRETE AND CEMENT PRODUCTS March 矿物掺合料对C1 00~C1 20超高强混凝土 基本性能的影响 王 斌，李晓欢，徐芬莲，苏 华 (中建商品混凝土成都有限公司610052) 摘 要：通过正交试验考察了胶凝材料总量、水泥用量及超细粉煤灰用量对超高强混凝土抗压强度的影响，研 究了硅灰、超细粉煤灰与复合硅材等矿物掺合料对C100~C120超高强混凝土基本性能的影响。结果表明，对超高强 混凝土强度影响最主要的因素是水泥在胶凝材料中所占的比例；超细粉煤灰与硅灰复掺对超高强混凝土工作性能 与强度改善效果较好；复合硅材对超高强混凝土的工作性能与强度均有一定的提高。 关键词：超高强混凝土；超细粉煤灰；硅灰；复合硅材；正交试验 Abstract：The influences of total amount cementitious material，cement content and ultra-fine fly ash dosage on the compressive strength of ultra-hi【gh strength concrete are studied by orthogonal test．The effects of mineral admixtures such as silica fume，ultra-fine fly ash and siliceous admixture on the basic properties of C100~C120 ultra．high strength con— crete are researched．The results show that the main affected factor on the compress strength of ultra-high strength con— crete is the proportion of cement in the cementitious materia1．Compounding both ultra—fine fly ash and silica fume is bet— ter for the workability and strength of the ultra-high strength concrete．At the same time，siliceous admixture also has the improvement on the workability and strength of the ultra—high strength concrete． Key words：Ultra-high strength concrete；Ultra-fine fly ash；Silica fume；Siliceous admixture；Orthogonal test 中图分类号：TU528 文献标识码：A 文章编号：1000—4637(2012)03-10-04 0 前言 特性，它可以改善混凝土的许多性质。这些矿物掺 2O世纪混凝土科学与工程技术取得了重大成 合料不再作为一种“废弃物”而加以利用，而是作为 就，高性能混凝土的应用极大地推动了混凝土科技