对GB8076—2008《混凝土外加剂》中混凝土配合比设计方法的思考  

Considerations on Mix Proportion Design Method Defined by GB8076—2008 Concrete Admixture

作　　者：毕亚丽[1] 张勇[1] 胡炜[1] 孙宇飞[1] 何惠英[1] 

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710043

出　　处：《水力发电》2014年第7期103-104,共2页Water Power

摘　　要：通过试验研究发现:GB8076—2008《混凝土外加剂》提出的"掺外加剂(非引气型)的受检混凝土和其对应的基准混凝土的水泥、砂、石的比例相同",同时要求"基准混凝土和受检混凝土单位水泥用量为330 kg/m3"这两个规定在外加剂配合比选择中不可能同时满足。如果按照只满足上述其中一条件设计配合比,会出现同一减水剂在不同方法下的减水率和抗压强度比不同,影响外加剂的质量评定结果。The tests find that the provisions of“the proportion of cement, sand and sand in concrete specimen mixed with admixture （non-air entraining） is the same as corresponding reference concrete” and “the cement should be 330 kg/m3 in both concrete specimen mixed with admixture and the corresponding reference concrete” defined by Chinese standard GB 8076-2008 Concrete Admixture cannot be simultaneously met in the selection of mix proportion of concrete mixed with admixture. If only one of above two provisions is met in the design of mix proportion, the water reduction ratio and compression strength ratio of concrete will be different with the values of another provision when using the same kind of water reducer, and so it will affect the evaluation of admixture quality.

关 键 词：混凝土外加剂 配合比设计 减水率 抗压强度比 

分 类 号：TU528[建筑科学—建筑技术科学]