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高强低自收缩复合骨料混凝土早期开裂倾向的预估——高强低自收缩复合骨料混凝土的研究之三
Study on high strength low auto-shrinkage concrete with composite aggregate III ——Predication of early age cracking tendency of high strength low auto-shrinkage concrete with composite aggregate
【摘要】 通过对混凝土依时的自收缩应变和弹性模量测定,求得依时自收缩应力。结果表明,复合骨料混凝土的自收缩应力比基准混凝土以及硅灰混凝土和矿粉混凝土小得多。与混凝土的依时抗拉强度比较,复合骨料混凝土的早期开裂倾向显著降低。
【Abstract】 On the basis of measurement of time-dependent auto-shrinkage strains and elastic modulus of concretes,the time-dependent auto-shrinkage stresses may be calculated.The results show that the auto-shrinkage stress in the concrete with the composite aggregate is much less than that in the reference concrete,especially in concrete containing silica fume and ground slag.Comparing with its time-dependent tensile strength the early age cracking tendency is reduced significantly by the composite aggregate in concrete.
【关键词】 高强低自收缩混凝土；
复合骨料；
开裂倾向；
依时抗拉强度；
依时自收缩应力；
【Key words】 high strength low auto-shrinkage concrete； composite aggregate； cracking tendency； time-dependent auto-shrinkage stress； time-dependent tensile strength；
【Key words】 high strength low auto-shrinkage concrete； composite aggregate； cracking tendency； time-dependent auto-shrinkage stress； time-dependent tensile strength；
【基金】 上海市科学技术发展基金资助项目(022012170)
- 【文献出处】 混凝土 ,Concrete , 编辑部邮箱 ,2006年06期
- 【分类号】TU528.041
- 【被引频次】6
- 【下载频次】132