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The cracking behaviors of the reinforced recycled aggregate concrete (RAC) beams both on the beam surface and inside the beams were experimentally studied when subjected to loads coupled with chloride-induced corrosion and were compared to that of the natural aggregate concrete (NAC) beam. More transverse cracks caused by loads were observed on the surface of the RAC beam than on the NAC one and the average propagating height and width of these cracks were smaller compared to those on the NAC beam. Surface cracking caused by steel corrosion was found to initiate earlier and propagate faster on the RAC beams than on the NAC one, under loads together with chloride ingress, and the crack width was significantly larger. Inside the reinforced beams, the width of the load/corrosion-induced cracks was found to develop in certain speeds along their propagating paths: the width development models inside the beams were likely to explain the differences between the RAC and NAC beams in their cracking behaviors on the beam surfaces. It was also found that the cracking caused by loads and steel corrosion can influence each other mutually. Despite the acceptable resistance against the load-induced cracking of the RAC beams in terms of the crack width control, this paper suggests that RAC's structural use in chloride environments should be taken with great caution, considering the serious corrosion cracking damages under loads coupled with chloride ingress. (C) 2019 Elsevier Ltd. All rights reserved.
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CONSTRUCTION AND BUILDING MATERIALS
ISSN: 0950-0618
Year: 2019
Volume: 210
Page: 364-379
4 . 4 1 9
JCR@2019
7 . 4 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:236
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 29
SCOPUS Cited Count: 30
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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