基于主成分分析的粉煤灰细骨料混凝土最优配合比研究  

Study on optimum of mix proportion of fly ash replacing fine aggregate concrete based on principal component analysis

作　　者：赵双权[1] 毛明杰[1] 张文博[1] 韩军召 

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021 [2]陕西工业职业技术学院,陕西咸阳712000

出　　处：《混凝土》2017年第8期104-106,共3页Concrete

基　　金：国家自然科学基金(51568055);宁夏科技支撑计划项目(2013ZYG30);宁夏大学研究生创新项目(GIP2017051)

摘　　要：主成分分析法是利用降维思想将多指标转化为综合指标,简化精准反映系统主要信息。研究以II级粉煤灰等体积替代细骨料拌制的11种配合比的泵送混凝土为基础,为了探求最优的配合比,选取直接影响混凝土新拌性能和硬化强度的6项主要指标,运用主成分分析法,对在0~50%不同粉煤灰替代率下混凝土性能进行综合评价,依据得分排序确定最优替代率。结果表明替代率为25%时,粉煤灰细骨料混凝土性能综合得分最高,性能最优。Principal component analysis （PCA） is a method to convert the multiple indexes into the comprehensive indexes by using the dimension-reduction theory, Simplified and accurate reflecting the major system information.Study upon the foundation ofthe performance of the 11 ratio of grade II fly ash replacing fine aggregate mixing pumping concrete.In order to explore the optimal mix proportion, selecting the 6 key indicators directly influenceing performance of the fresh concrete and hardened strength, using principal component analysis,comprehensively evaluating concrete performance about fly ash replacement rate among 0-50% ,determining the optimal replacement rate according to scores and sorting.The result showed the 25%, the score of is the highest, and the performance is the best.

关 键 词：粉煤灰细骨料混凝土 主成分分析 替代率 

分 类 号：TU528.062[建筑科学—建筑技术科学]