Title:
Resistance to Freezing and Thawing of Recycled Aggregate Concrete
Author(s):
Rohi M. Salem, Edwin G. Burdette, and N. Mike Jackson
Publication:
Materials Journal
Volume:
100
Issue:
3
Appears on pages(s):
216-221
Keywords:
aggregate; durability; recycled concrete
DOI:
10.14359/12622
Date:
5/1/2003
Abstract:
This paper describes a laboratory investigation of the resistance to freezing and thawing of recycled aggregate concrete (RAC) compared with that of natural aggregate concrete (NAC). Three different cases were considered for RAC and NAC. Case I consisted of using a medium water-cement ratio (w/ c) of 0.47 (base mixtures) for both RAC and NAC. Case II was varied from Case I by lowering the w/ c from 0.47 to 0.29 (high-performance concrete). Case III consisted of varying the base mixtures by entraining them with an air content of 5%. The durability performance of the RAC in Cases I and II was negatively affected by the recycled aggregates. These results contrast with those found for NAC in which full development of the freeze-thaw durability was achieved. With the use of entrained air (Case III), however, RAC was found to be as durable as NAC.