Modification of the bolomey formula in recycled aggregate concrete

被引：0

作者：

Zhang, Yong-Juan ^{[1
,2
]}

He, Shun ^{[1
,2
]}

Zhang, Xiong ^{[1
,2
]}

Liu, Xin ^{[1
,2
]}

Lu, Wei-Qun ^{[3
]}

机构：

[1] School of Materials Science and Engineering, Tongji University

[2] Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University

[3] Shanghai Baoshan Southern Cement Co., Ltd.

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2012年 / 15卷 / 04期

关键词：

Apparent density; Bolomey formula; Mix proportion design; Recycled aggregate concrete; Recycled coarse aggregate; Water absorption;

D O I：

10.3969/j.issn.1007-9629.2012.04.020

中图分类号：

学科分类号：

摘要：

Additional water consumption produced by adding recycled coarse aggregate to substitute part or all of natural coarse aggregate was introduced as a concept, the unit water consumption in recycled aggregate concrete was divided into two parts: net water consumption and additional water consumption. Ten groups of concrete with different proportions(by mass) were designed according to the different unit water consumption, which kept the workability of concrete almost the same when the recycled coarse aggregate replacement percentages(by mass) were 0%, 20%, 40%, 60%, 80% and 100%, respectively. The results show that there are good linear relations between the recycled coarse aggregate replacement percentages R and water absorption wCA or apparent density ρCA of coarse aggregate. Both the relation between compressive strength and cement to water ratio of concrete and the relation between compressive strength and net cement to water ratio of concrete are in accordance with Bolomey formula. Using the regression coefficients of quantitative relation between the compressive strength and cement to water ratio of concrete and the relation between compressive strength and net cement to water ratio of concrete, the Bolomey formula was modified by the water absorption wCA or apparent density ρCA of coarse aggregate to supply the recycled aggregate concrete proportion with an easier formula.

引用

页码：538 / 543

页数：5

共 6 条

[1] Aggregate for mortar and concrete - Part 100: Recycled aggregates
[2] Li J., Yin J., Zhou S.-Q., Et al., Experimental research on the mix design and the modified of recycled aggregate concrete, Journal of Railway Science and Engineering, 2, 6, pp. 66-71, (2005)
[3] Valeria C., Mechanical and elastic behavior of concretes made of recycled-concrete coarse aggregates, Construction and Building Materials, 24, 9, pp. 1616-1620, (2010)
[4] Kong D.-Y., Unified bolomey's formula of concrete made with natural and recycled coarse aggregate(I) - Effect of strength of coarse aggregate, Journal of Building Materials, 6, 2, pp. 129-134, (2003)
[5] Li K., Recycled aggregate and recycled aggregate concrete performance, (2005)
[6] Zhang X.-B., Compressive strength of recycled concrete mix and experimental research, (2005)

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