基于正交试验设计的大掺量粉煤灰混凝土配合比  

Mix proportion design of high-volume fly ash concrete using orthogonal test method

作　　者：陈炜一 樊星 李嵩 阎培渝[1] CHEN Weiyi;FAN Xing;LI Song;YAN Peiyu(Department of Civil Engineering,Qinghua University,Bejing 100084,China;China Construction First CGroup Construction and Development Co.,Ltd,Beijing 100103,China)

机构地区：[1]清华大学土木工程系,北京100084 [2]中建一局集团建设发展有限公司,北京100013

出　　处：《混凝土》2022年第8期1-5,共5页Concrete

基　　金：国家自然科学基金项目(51878381)。

摘　　要：使用正交试验法,进行用于超高层建筑的大体积底板的大掺量粉煤灰混凝土配合比设计。通过对正交试验结果的直观分析、极差分析、方差分析,得到了配合比中各主要变量对混凝土力学性能的影响规律。试验表明,大掺量粉煤灰混凝土的抗压强度的影响因素依照显著性排序依次为粉煤灰掺量、水胶比和单位立方米胶材用量。大掺量粉煤灰混凝土的抗压强度随粉煤灰掺量和水胶比的升高而降低,胶凝材料用量在合理范围内变动的影响较小。基于各因素的显著性分析结果,给出了混凝土强度和放热性能满足要求的C40混凝土配合比,实际浇筑效果良好。The orthogonal test metho d is used to do the mix proportion design of high-volume fly ash concrete used for the massive foundation of a super-high building.The direct analysis,range analysis and variance analysis of the orthogonal test result are carried out to reveal the influence of the main variables in the mix proportion on the mechanical properties of concrete.The results show that the factors which influence the compressive strength of high-volume fly ash concrete in order of significance are dosage of fly ash,water-binder ratio and binder content.The compressive strength of high-volume fly ash concrete decreases with the increase of dosage of fly ash and water-binder ratio,but the binder content in a reasonable range has little influence on it.Based on significance analysis results of various factors,an optimized mix proportion of C40 concrete was designed,which meets the requirement of mechanical and thermal properties.The real concrete casting result is satisfied.

关 键 词：正交试验法 配合比设计 大掺量粉煤灰混凝土 强度 

分 类 号：TU528.062[建筑科学—建筑技术科学]