再生粗骨料取代率对再生保温混凝土抗压强度离散性影响

发布时间：2018-05-24 18:21

本文选题：再生保温混凝土 + 再生粗骨料取代率　；参考：《科学技术与工程》2017年13期

【摘要】：对再生保温混凝土(简称为RATIC)的抗压强度和抗压强度离散性的规律进行了分析。通过改变RATIC中再生粗骨料的取代率,对比分析不同再生粗骨料取代率对RATIC的抗压强度和离散性的影响;并且探索出其相应的规律。以再生粗骨料不同取代率为基础的研究试验发现:当再生粗骨料取代率为30%时,RATIC抗压强度相对于取代率为0%的保温混凝土的抗压强度值没有发生显著变化;当再生粗骨料取代率在30%以上时,随着再生粗骨料取代率的增加,RATIC抗压强度值出现明显下降的现象;当再生粗骨料取代率达到70%时,相对应的RATIC抗压强度出现最低值。与此同时,RATIC在不同再生粗骨料取代率对应下的抗压强度标准差值的波动幅度也较为明显;当再生粗骨料取代率在0~100%时,RATIC的抗压强度标准差在0.97~1.71 MPa之间变化;并且当再生粗骨料取代率为50%时,RATIC抗压强度标准差达到最大值1.71 MPa。
[Abstract]:The regularity of compressive strength and dispersion of compressive strength of recycled insulating concrete (RATICs) is analyzed. By changing the replacement rate of recycled coarse aggregate in RATIC, the influence of different replacement ratio of regenerated coarse aggregate on the compressive strength and dispersion of RATIC was analyzed, and the corresponding rules were explored. Based on the research of different replacement ratio of recycled coarse aggregate, it is found that when the replacement ratio of recycled coarse aggregate is 30, the compressive strength of RATIC has no significant change compared with the compressive strength of insulating concrete with 0% replacement ratio. When the replacement ratio of recycled coarse aggregate is above 30%, the compressive strength of RATIC decreases obviously with the increase of the replacement rate of recycled coarse aggregate, and when the replacement ratio of recycled coarse aggregate reaches 70%, the compressive strength of the corresponding RATIC appears the lowest value. At the same time, the variation of the standard difference of compressive strength of RATIC under different replacement ratio of recycled coarse aggregate is obvious, and the standard deviation of compressive strength of RATIC varies from 0.97 to 1.71 MPa when the replacement ratio of recycled coarse aggregate is in the range of 0 ~ 100. And when the replacement ratio of recycled coarse aggregate is 50, the standard deviation of compressive strength of RATIC reaches the maximum value of 1.71 MPa.
【作者单位】：太原理工大学建筑与土木工程学院;
【基金】：国家自然科学基金(51508370,51678384)资助
【分类号】：TU528

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