CAJ | 학술논문

试验测定了再生骨料的各项技术指标，以及在不同再生骨料取代率下的再生混凝土的坍落度、强度等技术指标。通过对试验数据进行分析，得出下以结论：再生骨料的各项物理技术性能比天然骨料有一定程度降低，但满足 GB／T25177－2010规定要求，可用于再生混凝土。再生骨料吸水率大，在再生混凝土配合比设计用水量的确定时应充分考虑。随着再生骨料取代率增加混凝土坍落度在减小。再生混凝土强度也与再生骨料取代率密切相关，当取代率为40％时，强度降低幅度较小；当取代率达100％时，强度下降明显，因此配制再生混凝土时，控制再生骨料取代率是关键因素。
시험측정료재생골료적각항기술지표，이급재불동재생골료취대솔하적재생혼응토적담락도、강도등기술지표。통과대시험수거진행분석，득출하이결론：재생골료적각항물리기술성능비천연골료유일정정도강저，단만족 GB／T25177－2010규정요구，가용우재생혼응토。재생골료흡수솔대，재재생혼응토배합비설계용수량적학정시응충분고필。수착재생골료취대솔증가혼응토담락도재감소。재생혼응토강도야여재생골료취대솔밀절상관，당취대솔위40％시，강도강저폭도교소；당취대솔체100％시，강도하강명현，인차배제재생혼응토시，공제재생골료취대솔시관건인소。
The paper determined main technical indexes of recycled aggregate,as well as several indexes of recycled concrete like slump and strength under different aggregate replacement rates.Based on the analysis of experimental data,we can conclude that all physical technical properties of recycled aggregate are lower than those of natural aggregate to some extent,but they meet specified re-quirements of GB/T25177 -2010.Recycled aggregate has great water absorption which should be fully considered when identifying the water consumption of the concrete.As the replacement rate of recycled aggregate increases,the slump of concrete decreases.The con-crete strength is also strongly coupled with the aggregate replacement rate,and the strength decrease is relatively small when the re-placement rate is 40%;it has a evident decline when the replacement rate reaches 100%.Therefore,controlling the replacement rate is the key factor while making up the recycled concrete.