Materiales de Construcción, Vol 65, No 320 (2015)

The influence of the curing conditions of concrete on durability after freeze-thaw accelerated testing


https://doi.org/10.3989/mc.2015.06514

G. Al-Assadi
E.T.S. de Ingenieros de Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Spain

M. J. Casati
E.T.S.I. Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Spain

J. C. Gálvez
E.T.S. de Ingenieros de Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Spain

J. Fernández
E.T.S. de Ingenieros de Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Spain

S. Aparicio
Instituto de Tecnologías Físicas y de la Información “Leonardo Torres Quevedo”, ITEFI, (CSIC), Spain

Abstract


This work relates the curing conditions of concrete with the damage caused by rapid freeze-thaw cycles (ASTM C 666). The “potential” durability of concrete after testing is also studied. In countries with a continental climate, the curing of concrete in summer is performed under high-temperature and low-humidity conditions, and during the winter the concrete undergoes freezing and thawing. This paper shows the experimental results of the behaviour of concrete specimens cured under climatic summer conditions and then subjected to freeze-thaw cycles. Curing of the specimens includes conditions of good and bad practice in relation to wetting and protection of the concrete. Mechanical properties, cement hydration, volume and pore sizes, oxygen permeability, chloride diffusion and water penetration under pressure tests of the concrete are assessed. These tests were performed before and after the application of the freeze-thaw cycles. Statistical analysis of the correlation among variables is also included.

Keywords


Concrete; Freezing/thawing; Hydration; Permeability; Curing

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