摘要
试验研究了掺超细矿渣和硅粉的高强混凝土的断裂特性并与欧洲国际混凝土协会提出的ＣＥＢ－ＦＩＰＭｏｄｅｌＣｏｄｅ１９９０（ＭＣ９０）中的相关内容进行了比较与分析。混凝土的抗压强度、抗拉强度和弹性模量随超细矿物掺合料的掺加有明显的增大，且变化情况与ＭＣ９０相近，而超细矿物掺合料对混凝土脆性的影响比较复杂：单掺超细矿渣基本上不影响高强混凝土的脆性，双掺超细矿渣和硅粉明显增加混凝土的脆性，而且它们的变化情况与ＭＣ９０相差较大。
In the paper, the fracture properties of high strength concrete with ultrafine slag and/or silica fume are experimentally investigated, the testing results are compared with CEB-FIP Model Code 1990(MC90) published by committee Euro-International du Beton. The compressive strength, tensile strength and elastic modules increase obviously with addition of ultrafine mineral admixtures, and their variations are similar with MC90, nevertheless, the effects of ultrafine mineral adnixtures on the fracture properties of high strength concrete are complicated: the brittleness of high strength concrete with ultrafine slag does not change mainly, but the brittleness of high strength concrete with ultrafine slag and silica fume increases obviously, and the variations of brittleness are quite different with MC90.
出处
《混凝土与水泥制品》
北大核心
1998年第5期5-9,共5页
China Concrete and Cement Products
关键词
高强混凝土
矿物掺合料
断裂特性
脆性
试验
High strength concrete Ultrafine mineral admixture fracture properties brittleness
