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.
Highlights
This work relates the curing conditions of concrete with the damage caused by rapid freeze-thaw cycles (ASTM C 666)
In countries with a continental climate, concrete is often cast in the summer months - under conditions of high temperature and low humidity - and is subject to freeze-thaw cycles during winter
The objective of this paper is to study the influence of the curing conditions of concrete when cast under summer conditions in the internal deterioration and scaling resistance under freeze-thaw cycles
Summary
This work relates the curing conditions of concrete with the damage caused by rapid freeze-thaw cycles (ASTM C 666). RESUMEN: Influencia de las condiciones de curado del hormigón en su durabilidad tras los ensayos acelerados de ciclos hielo-deshielo. Este trabajo relaciona las condiciones de curado del hormigón con los daños causados por ciclos hielo-deshielo (ASTM C 666). In countries with a continental climate, concrete is often cast in the summer months - under conditions of high temperature and low humidity - and is subject to freeze-thaw cycles during winter. This scenario can worsen if de-icing salts are added [5,6,7], such as the cases of the pillars and slabs of road bridges [8, 9]. While in certain cases the type of curing is found to have little influence [15, 16], in others concretes cured with a curing admixture appear to have an improved scaling resistance [17, 18]
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