基于正交试验的超高层泵送混凝土配合比优化研究  

Optimization of pumping concrete mix ratio for super high-rise buildings based on orthogonal experiment

作　　者：李战国[1] 张浩[1] 王子赓 李悦[1] LI Zhanguo;ZHANG Hao;WANG Zigeng;LI Yue(Beijing Key Lab of Earthquake Engineering and Structural Retrofit,The Key Laboratory of Urban Security and Disaster Engineering,MOE,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室、工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《混凝土》2022年第12期110-116,共7页Concrete

基　　金：“十三五”国家重点研发计划(2017YFB0310100);北京市教育委员会科技计划一般项目(KM202110005018);固废资源化利用与节能建材国家重点实验室开放基金资助项目(SWR-2016-002)。

摘　　要：依托于武汉某超高层高压泵送工程,采用正交设计试验对泵送混凝土配合比进行了优化,选择水胶比、砂率、单位立方米水泥用量、粉煤灰掺量、矿粉掺量、硅灰掺量6个影响因素进行研究,每个因素选取了5个水平,坍落度、扩展度、V型漏斗流空时间、抗压强度、抗拉强度、28 d干燥收缩率作为考核指标。根据正交设计方案进行了25组试验,并据此进行了极差分析和方差分析,得到了6种因素的影响规律以及满足不同泵送高度工程需求的优化配合比。Based on a super high-rise high-pressure pumping project in Wuhan,it uses orthogonal design experiments to optimize the mixing ratio of pumped concrete.Six influencing factors including water-binder ratio,sand ratio,single cement dosage,fly ash content,mineral powder content,silica fume content were studied,and five levels were selected for each factor,contaning slump,expansion,V-funnel empty time,compressive strength,tensile strength,28 d drying shrinkage rate as assessment indicators.According to the orthogonal design scheme,25 sets of experiments were carried out,and the range analysis and variance analysis were carried out accordingly.The influence law of the six factors and the optimized mix ratio to meet the engineering requirements of different pumping heights were obtained.

关 键 词：正交试验 超高层泵送混凝土 极差分析 方差分析 影响规律 优化配合比 

分 类 号：TU528.062[建筑科学—建筑技术科学]