摘要
运用正交试验方法研究了混凝土配合比中3个独立变量即水固比、水灰比和砂率对其收缩及相关性能的影响,结果表明,在同一原材料和环境条件下,水固比是影响混凝土收缩的最主要因素,水灰比次之,砂率影响程度最小;采用功效系数法进行多指标正交分析,确定了混凝土最优配合比选择范围;研究了集灰比、浆集比对混凝土收缩的影响,指出存在使混凝土收缩最小的集灰比及浆集比的临界值.
By adopting the method of orthogonal experimental design, the influence of three independent variables,that is water-solid ratio, water-cement ratio and sand percentage on the shrinkage of concrete and other related properties was studied. The results show that water-solid ratio is one of the most important factors affecting shrinkage of concrete, secondly water-cement ratio and lastly sand percentage under the same conditions. By using value coefficient to analyze the orthogonal experiment results, the optimized mix proportion of concrete is determined. Meanwhile, the influence of aggregate-cement ratio and paste-aggregate ratio is discussed. The results show that there are critical values leading to the minimum of the concrete shrinkage.
出处
《建筑材料学报》
EI
CAS
CSCD
2006年第1期92-98,共7页
Journal of Building Materials
基金
上海市科技攻关重点项目(032112059)
关键词
体积稳定性
收缩
正交设计
配合比
volume stability
shrinkage
orthogonal design
mix proportion
