Title:
EXPERIMENTAL STUDY ON REINFORCEMENT CORROSION-INDUCE COVER CRACKING TIME EMBEDED IN CONCRETE, MORTAR, AND CEMENT PASTE
Author(s):
Wanchai Yodmuangjai, Paveew Charoenpong, Panuwat Kaewsriang, Thanathorn Sawathiyan
Publication:
TCA
Volume:
3
Issue:
2
Appears on pages(s):
17-23
Keywords:
Corrosion-induced cover cracking, Corrosion rate, Strength, Modulus of elastic
DOI:
Date:
6/1/2015
Abstract:
The objectives of this research were to evaluate the influence of compressive strength, elastic modulus and corrosion rate on concrete cover cracking time of steel reinforced concrete, mortar, and cement paste and to compare concrete cover cracking times tested from experimental study with those predicted from the existing models. The corrosion was accelerated by applying the direct current between the reinforcement and the external electrode and the time at cover cracking was monitored by strain gauges attached around the specimens. As a result, the influences of elastic modulus and compressive strength on the cover cracking time had the same trend. The higher the strength and the modulus of elasticity was the longer the cover cracking time. Comparing three types of materials, the cover cracking time of cement paste specimen was the shortest followed by those of mortar and concrete, respectively. It was found that the higher the corrosion rate was the higher the reinforcement weight loss in the specimens. In addition, the results calculated from the existing model were satisfied to predict the results from the experiment.
Thailand Concrete Association, International Partner Access
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