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针对传统水泥混凝土路面板底补强材料在压力施工条件下易产生离析等流动性不佳问题,本研究以矿渣粉为胶凝材料,水玻璃为激发剂,结合高效减水剂、缓凝剂和细集料制备矿渣基补强材料,并测试其流动度,研究了其流动性能,经过筛选提出了最佳原材料组成和比例。结果表明,聚羧酸系减水剂对改善补强材料工作性能最为明显,且最佳掺量为矿渣粉质量的1.2%;MgCl2缓凝剂最有利于补强材料流动性能的提高,且补强材料的初始流动度和30min流动度先随MgCl2掺量的增加而增加,然后随MgCl2掺量的增加而降低,最佳掺量为矿渣粉质量的1.0%;水胶比(W/B)为0.34时,补强材料拥有最好的流动性能。
Aiming at the problem of poor fluidity, such as segregation of traditional reinforced cement concrete pavement reinforcements under pressure conditions, slag powder as cementitious material and water glass as activator, combined with superplasticizer, retarder And fine aggregate were used to prepare slag-based reinforcing materials. The fluidity of the slag-based reinforcing materials was tested and the fluidity was studied. The optimum composition and proportion of raw materials were proposed through screening. The results showed that polycarboxylate water reducer had the most obvious improvement on the workability of reinforcing materials, and the best dosage was 1.2% of slag powder quality. MgCl2 retarder was the most conducive to enhance the flowability of reinforcing materials, The initial fluidity and the fluidity at 30 min increased with the increase of MgCl2 content, and then decreased with the increase of MgCl2 content. The best content was 1.0% At 0.34, the reinforcing material has the best flow properties.