RESEARCH OF THE DEPENDENCE OF THE GRAIN SIZE COMPOSITION AND GRADE OF CRUSHABILITY OF RECYCLED CRUSHED STONE ON THE STRENGTH OF THE ORIGINAL RECYCLED CONCRETE

Z. Beppaev, L. Astvatsaturova, Sergey Kolodyazhniy, Sergey Vernigora, Vladislav Lopatinskiy
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Abstract

The results of the study of the grain-size composition and the grade of crushability of recycled crushed stone and their dependence on the strength of the original recycled concrete are presented. It is found that recycled crushed stone obtained from the original concrete of classes B10 - B30 does not meet the requirements of GOST 8267-93 for total residues on Ø25, Ø20, Ø5 and Ø2.5 sieves. Regardless of the strength of the original concrete, the main fraction of recycled crushed stone is grains with sizes from 12.5 to 20 mm. The strength (grade in terms of crushability) of the recycled crushed stone increases with an increase in the strength of the original concrete. The study of the main parameters of recycled crushed stone at the current moment has been carried out in an insufficient (for widespread introduction into production) volume and requires further study for the subsequent development of independent regulatory and technical documentation (or additions to the current regulatory and technical documents).
再生碎石的粒度组成和破碎等级对原再生混凝土强度的依赖性研究
介绍了再生碎石的粒度组成、破碎等级及其对原再生混凝土强度的依赖关系的研究结果。研究发现,从B10 ~ B30级原混凝土中获得的再生碎石不符合GOST 8267-93对Ø25、Ø20、Ø5和Ø2.5筛上总残留的要求。无论原始混凝土的强度如何,回收碎石的主要成分是12.5至20毫米的颗粒。再生碎石的强度(按可破碎性等级计算)随着原混凝土强度的增加而增加。目前对再生碎石主要参数的研究还不够(不足以广泛投入生产),需要进一步研究,以便随后制定独立的法规和技术文件(或对当前法规和技术文件的补充)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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