摘要
通过对3种不同的再生混凝土和易性影响研究,发现随着再生骨料取代率的不断增大,再生混凝土的流动性均降低,降低幅度的顺序为再生混凝土③>再生混凝土①>再生混凝土②;掺粉煤灰后再生混凝土拌合物的坍落度有所增加,但增加幅度并不大;正交试验显示,影响坍落度的4因素主次顺序为:再生骨料①取代率、高效减水剂、再生骨料②取代率、粉煤灰掺量,再生混凝土中加入高效减水剂和粉煤灰,可显著提高新拌再生混凝土的流动性,且粘聚性和保水性也较好。
Through study on the influence of 3 different recycled concrete workability,the test result shows : as recycled aggregate replacement rate increasing,slump of recycled concrete will decrease,reducing the order of recycled concrete > recycled concrete > recycled concrete;Slump of recycled concrete increased after fly ash admixed,but the rate of increasing is not large;orthogonal test showed that the 4 factors that affect the slump of primary and secondary order: recycled aggregate replacement rate superplasticizer recycled aggregate replacement rate,fly ash.Slump of recycled concrete by adding superplasticizer and fly ash can significantly increase,and cohesiveness and water retention are better.
出处
《商品混凝土》
2011年第7期44-46,共3页
Ready-Mixed Concrete
基金
河南省教育厅自然科学研究计划项目(项目编号2010B430022)
