施工工艺对中低强度混凝土抗压强度的影响  

EFFECT OF CONSTRUCTION TECHNOLOGY ON COMPRESSIVE STRENGTH OF MEDIUM-LOW STRENGTH CONCRETE

作　　者：程云虹[1] 杨四辉 童柏强 蔡运生 CHENG Yun-hong;YANG Si-hui;TONG Bai-qiang;CAI Yun-sheng(School of Resources&Civil Engineering,Northeastern University,110819,Shenyang,China)

机构地区：[1]东北大学资源与土木工程学院,沈阳110819

出　　处：《建筑技术》2020年第9期1085-1088,共4页Architecture Technology

基　　金：国家自然科学基金资助项目(51874076)。

摘　　要：基于正交试验设计,研究拌和顺序(水泥先拌和,骨料先拌和,同时拌和)、振捣(人工振捣,机械振捣,免振捣)及养护(自然养护,标准养护,绝湿养护)对水胶比分别为0.60、0.49及0.42的混凝土28d抗压强度的影响,应用级差分析和方差分析方法分析正交试验结果,结果表明拌和顺序、振捣及养护对水胶比为0.60、0.49及0.42的混凝土抗压强度影响程度排序为:养护,振捣,拌和顺序;对水胶比为0.60和0.49的混凝土最佳组合方式为:自然养护,机械振捣,骨料先拌和;而对水胶比为0.42的混凝土最佳组合方式为:标准养护,机械振捣,骨料先拌和。Based on the orthogonal test to study the influence of mixing sequence(cement,aggregates and mixing),vibration(artificial,mechanical and non-vibration)and curing(natural,standard and humidity-insulated curing)on the 28 days compressive strength of concrete with water-binder ratio of 0.60,0.49 and 0.42 respectively.The differential analysis and variance analysis were made for the orthogonal test results.The analyses indicated that among the three influencing factors on the compressive strength of the concrete with water-cement ratio of 0.60,0.49 and 0.42 the curing,vibrating and mixing order are ranked the first,second and third,respectively,and the concrete with water-binder ratio of 0.60 and 0.49,the optimal modes(levels)are the natural curing,mechanical vibration and aggregate mixing,and the concrete with water-binder ratio of 0.42,the optimal modes(levels)are the standard curing,mechanical vibration and aggregate mixing.

关 键 词：中低强度混凝土 正交试验 水胶比 抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学]