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|Title:||Effect of cumulative lightweight aggregate volume in concrete on its resistance to chloride-ion penetration|
|Authors:||Liu, X.M. |
|Source:||Liu, X.M.,Zhang, M.H. (2009). Effect of cumulative lightweight aggregate volume in concrete on its resistance to chloride-ion penetration. Excellence in Concrete Construction through Innovation - Proceedings of the International Conference on Concrete Construction : 175-180. ScholarBank@NUS Repository.|
|Abstract:||This paper presents an experimental study on the resistance of lightweight aggregate concretes to chloride-ion penetration in comparison to that of normal weight concrete of similar w/c. Salt ponding test (based on AASHTO T 259), rapid chloride permeability test (ASTM C 1202) and rapid migration test (NT Build 492) were carried out to evaluate the concrete resistance to the chloride-ion penetration. Results indicate that in general the resistance of the LWAC to the chloride-ion penetration was in the same order as that of NWAC of similar w/c. However, the increase in cumulative LWA volume and the incorporation of finer LWA particles led to higher charge passed, migration coefficient, and diffusion coefficient. Since the LWACs had lower 28-day compressive strength compared with that of the NWAC of similar w/c, the LWACs may have equal or better resistance to the chloride-ion penetration compared with the NWAC of equivalent strength. The trend of the resistance of concretes to chloride-ion penetration determined by the three test methods was reasonably consistent although there were some discrepancies due to different test methods. © 2009 Taylor & Francis Group, London.|
|Source Title:||Excellence in Concrete Construction through Innovation - Proceedings of the International Conference on Concrete Construction|
|Appears in Collections:||Staff Publications|
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