基于正交试验设计的PVA-ECC基体组分对其力学性能影响的显著性水平研究  

Based on orthogonal design of experiment on the mechanical properties of PVA-ECC matrix components affect the significance level of study

作　　者：王冲 高淑玲[1,2] WANG Chong;GAO Shuling(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;Civil Engineering Technology Research Center of Hebei Province,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通工程学院,天津300401 [2]河北省土木工程技术研究中心,天津300401

出　　处：《混凝土》2018年第11期52-55,共4页Concrete

基　　金：国家自然科学基金资助项目(51108151)

摘　　要：从单因素试验和正交试验两方面出发来研究PVA-ECC抗折强度和抗压强度的影响因素及每个因素的影响顺序。首先从水胶比、砂胶比、粉煤灰的掺量和纤维的掺量等单因素出发,来找出每个参数的最佳范围,然后用正交试验的方法分别设计制作出PVA-ECC纤维混凝土抗折强度和抗压强度试块,通过对试验结果的分析找出各指标因素影响的主次顺序、最优组合及显著性水平。结果表明:当水胶比为0.25,砂胶比为0.45,粉煤灰掺量为45%,减水剂掺量为0.5%时,PVA-ECC抗折、抗压强度达到最佳;28 d抗折强度的影响程度顺序:膨胀剂>粉煤灰掺量>水胶比>减缩剂>砂胶比;28 d抗压强度的影响程度顺序:水胶比>减缩剂>膨胀剂>粉煤灰掺量>砂胶比。In this paper,from two aspects of the single factor test and orthogonal test to study the PVA-ECC flexural strength and compressive strength of influence factors and the influence of each factor sequence.First from the water/cement ratio,sand cement ratio,dosage of fly ash and fibre content,such as single factor to find the best range for each parameter,then respectively using the method of orthogonal experiment design to produce PVA-ECC fiber concrete flexural strength and compressive strength test block,through the analysis of test results of the index factors of primary and secondary order,find out the optimal portfolio and the significance level.The results show that when water cement ratio of0.25,sand cement ratio0.45,45%dosage of fly ash,dosage of water reducing agent was0.5%,PVA-ECC flexural,compressive strength to achieve the best;The influence degree of the flexural strength of28days order:expansion agent>water dosage of fly ash/cement ratio>shrinkage-reducing agent>sand cement ratio;28days compressive strength order:the influence of water-binder ratio>shrinkage-reducing agent>expansion agent>sand and dosage of fly ash/cement ratio.

关 键 词：PVA-ECC 正交试验 抗折强度 抗压强度 显著性水平 

分 类 号：TU528.01[建筑科学—建筑技术科学]