摘要
采用L9(34)正交分析表,选取胶凝材料用量、粉煤灰掺量、矿粉掺量和水胶比四个因素,每个因素选取三个水平,分别对铁路箱梁C50配合比的10,28 d强度进行了正交分析。结果表明:对于10 d强度,粉煤灰的影响系数要高于水胶比和胶凝材料用量,矿粉影响系数最小;对于28 d强度,影响系数最大的是水胶比,其次是胶凝材料用量,影响系数最小的是矿粉用量。根据正交分析结果并结合实际工程需要,设计出满足标准和施工要求的配合比。
This paper selects 4 factors（mass of binder,proportion of fly ash（FA）,proportion of Granulated blast furnace slag（SL）,water to binder ratio（W /B）） and 3 levels for each factor,then an orthogonal test table（L9（34）） is used to respectively analyse the compressive strength of 10 d and 28 d.The results show that the proportion of FA is the first main factor to affect the compression strength of early age（10 d） concrete.The W /B is the second factor.But for 28 d concrete,the W /B is the first main factor and the mass of binder is the second factor.For all of the test ages,the proportion of SL has the least effect on the compressive strength.According to the analysis result and the need of engineering,it has been designed a concrete mix sufficient to meet a standard requirement and construction need.
出处
《工业建筑》
CSCD
北大核心
2010年第11期9-12,共4页
Industrial Construction
基金
国家"863计划"资助项目(2008AA030704)
关键词
正交设计
铁路箱梁
强度
水胶比
orthogonal design
railway box girders
strength
water to binder ratio
