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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 the study of the influence of three kinds of recycled concrete on the workability, it was found that with the increasing replacement rate of recycled aggregates, the fluidity of recycled concrete decreased, the order of reduction was recycled concrete ③> recycled concrete ①> recycled concrete ② The slump of recycled concrete mixture increased with fly ash, but the increase range was not large. The orthogonal test showed that the order of the four factors affecting slump was as follows: the replacement ratio of recycled aggregate ① , Superplasticizer, recycled aggregate ② replacement rate, fly ash content, recycled concrete admixture of superplasticizer and fly ash can significantly improve the flowability of fresh recycled concrete, and the cohesiveness and water retention Also better.