Analysis of the Durability of Lightweight Concrete Protected by an Acrylic Layer in an Aggressive Acid Environment

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When exposed to adverse conditions the concrete must be protected so as to maintain absorption at acceptable levels. This paper presents the assessment of a lightweight expanded clay concrete protected by an acrylic layer exposed to an aggressive environment. The specimens were prepared with 370kg/m3 of cement and the water-binder ratio of 0.50 corresponds to the value established in NBR 6118 types for concrete subjected to highly aggressive environments. The concrete produced presented specific mass of 1,600kg/m3, dry consistency and compressive strength of 25MPa. Visual inspection shows that the protected specimens of lightweight concrete presented a clear reduction of the loss of cohesion of the grout caused by the attack as well as lower water absorption and mass loss. The acrylic layer assessed as a surface protector presented a good adherence level to the substrate and efficiency since it reduced the penetration of the aggressive agent, thus minimizing degradation and increasing durability of the lightweight expanded clay concrete.

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255-259

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October 2015

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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