摘要
利用正交试验方法,通过三点弯曲试验,分析了高性能混凝土配合比设计参数中水胶比、粉煤灰掺量、砂率对其断裂性能的影响。研究结果表明,3个参数对高性能混凝土60 d龄期断裂能的影响大小为:水胶比、粉煤灰掺量、砂率,且适宜掺量的粉煤灰积水胶比对改善混凝土的脆性非常有利。同时,高性能混凝土的脆性与其强度之间不存在确定的量化关系。
Fracture energy of high performance concrete（HPC）is studied through three-point bent test on notched beams.The effect of influencing factors including ratio of water to cementing material,fly ash composite additive and sand percentage has been analyzed by the means of orthogonal experiment.The consequence of these three factors is：ratio of water to cementing material,fly ash composite additive,sand percentage.And fly ash is very useful to improve the brittleness of concrete.In addition,the study finds that a direct relationship between fracture energy and strength may not exit.
出处
《混凝土》
CAS
CSCD
北大核心
2010年第10期56-59,共4页
Concrete
基金
交通部西部交通建设科技项目(200831881210)
关键词
高性能混凝土
断裂能
水胶比
粉煤灰掺量
砂率
high performance concrete（HPC）
fracture energy
ratio of water to cementing material
fly ash composite additive
sand percentage
