Development of lightweight aggregate concrete with high resistance to water and chloride-ion penetration
Liu, Xuemei, Chia, K.S., & Zhang, M.H. (2010) Development of lightweight aggregate concrete with high resistance to water and chloride-ion penetration. In CONSEC '10 Proceedings of the 6th International Conference on Concrete Under Severe Conditions, Taylor & Francis Ltd, Mérida, Yucatán, Mexico, pp. 813-822.
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This paper presents an experimental study to evaluate the effect of coarse and fine LWA in concrete on its water absorption and permeability, and resistance to chloride-ion penetration. In additions, LWC with lower unit weight of about 1300 kg/m3 but high resistance to water and chloride-ion penetration was developed and evaluated. The results indicate that the incorporation of coarse LWA in concrete increases water sorptivity and permeability slightly compared to NWC of similar w/c. The resistance of the sand-LWC to chloride-ion penetration depends on porosity of the coarse LWA. Fine LWA has more influence on the transport proper-ties of concrete than coarse LWA. Use of lightweight crushed sand <1.18 mm reduced the resistance of the LWC to water and chloride-ion penetration to some extent. With low w/cm and silica fume, low unit weight LWC (~1300 kg/m3) was produced with higher resistance to water and chloride ion penetration compared with concretes of higher unit weights.
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