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首页> 外文会议>Fifth ACI International Conference on Innovations in Design with Emphasis on Seismic, Wind, and Environmental Loading; Quality Control and Innovations in Materials/Hot-Weather Concreting Dec, 2002 Cancun, Mexico >Shrinkage of Concrete with Replacement of Aggregate with Recycled Concrete Aggregate
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Shrinkage of Concrete with Replacement of Aggregate with Recycled Concrete Aggregate

机译：用再生混凝土骨料代替骨料来收缩混凝土

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摘要

In this paper we present the experimental analysis of samples of concrete where portion of the natural aggregate were replaced with recycled aggregate originating from concrete (RCA). Experimental analysis to obtain the shrinkage properties (basic and dried) of the concrete containing recycled concrete aggregate (CRCA) was performed. The percentages of replacement of natural aggregate with RCA were 0%, 15%, 30%, 60% and 100% with test conditions of 50% RH and 20℃. The results of these trials are compared with reference concrete tests, at an age of 270 days. The results demonstrated an increase in the shrinkage of the CRCA that is proportional to the amount of RCA used as a replacement for the natural aggregate. When compared to the reference concrete, the drying shrinkage showing significant changes; however, their evolution over time is similar to standard concrete.
机译：在本文中，我们介绍了对混凝土样品的实验分析，其中部分天然骨料被源自混凝土的再生骨料（RCA）代替。进行了实验分析以获得包含再生混凝土骨料（CRCA）的混凝土的收缩性能（基本和干燥）。在50％RH和20℃的测试条件下，RCA替代天然骨料的百分比分别为0％，15％，30％，60％和100％。将这些试验的结果与270天龄的参考混凝土试验进行比较。结果表明，CRCA收缩率的增加与用于替代天然骨料的RCA的数量成比例。与参考混凝土相比，干燥收缩率显示出明显的变化。但是，它们随时间的演变类似于标准混凝土。

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