Shrinkage of Concrete with Replacement of Aggregate with Recycled Concrete Aggregate

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Title: Shrinkage of Concrete with Replacement of Aggregate with Recycled Concrete Aggregate

Author(s): J. M. V. Gomez-Soberon

Publication: Special Publication

Volume: 209

Issue:

Appears on pages(s): 475-496

Keywords: basic shrinkage; recycled concrete; recycled concrete aggregate; shrinkage; shrinkage by drying

Date: 9/26/2002

Abstract:
In this paper we present theexperimental 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°C. 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 am- of RCA used as a replacement for the natural aggregate. When compared to the derence concrete, the drying shrinkage showing significant changes; however, their evolution over time is similar to standard concrete.