Author
A.A. Ramezanianpour
;
V. Shahhosseini
;
A. Nilforoushan
Publication Date
1385-07
Subject
bond strength, chloride permeability, concrete, pull-off test, repair material, roughness
Type
Periodical
Language
Persian
Digital
Yes
Manuscript
No
Library
University of Toronto
Library Asset ID
ISSN: 2008-0441, EISSN: 2345-5462, DOI: 10.22061/tej.2006.1244
Record ID
cdi_doaj_primary_oai_doaj_org_article_309a45956e6d48d9b88445904f1fc532
Library Location
DOAJ Directory of Open Access Journals
Date
1385-07
Notes
The purpose of this investigation was to study the effect of bonding behavior of concrete substrate and repair materials. Three different cementitious or modified-cementitious repair materials and three surface roughnesses were studied. Repair materials were ordinary mortar, modified cementitious mortar by silica fume and modified cementitious mortar by styrene butadiene rubber latex. Surface preparations were smooth surface, rough surface and epoxy resin adhesive as a bonding agent. The method used for evaluation of bond strength was pull-off test. the influence of the electrical conductivity of repairing materials was analyzed by rapid chloride permeability test. Finally, the performance of the adhesives was evaluated considering both the bond strength and electrical conductivity. Results obtained from these tests indicated that the roughness of substrate surface has a main effect on the performance of bond between adhesives and concrete. There are not great differences in bonding strength between various repairing materials but considering electrical conductivity, modified cementitious mortars are better materials for using in corrosive environments to increase service life of repaired structures
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