Use of normal-density high-absorption limestone aggregate as internal curing agent in concrete

E-ISSN： 1208-6029|42|11|827-833

ISSN： 1208-6029

Source： Canadian Journal of Civil Engineering, Vol.42, Iss.11, 2015-01, pp. : 827-833

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Abstract

A common practice to provide additional water for the hydration process of cement is to use special aggregates that act as agents incorporating water to the concrete (lightweight natural aggregates or polymers). Previous studies have suggested that normal-density high-absorption limestone aggregates may produce a similar effect. The aim was to determine if they can function as an internal curing agent. The methodology consisted of concrete specimens employing two types of aggregates and subjected to three different curing treatments. Results showed similar values of compressive strength and porosity among the concrete cured under wet and dry treatments for the high-absorption limestone aggregate but not for the river rock aggregate. Thus, this effect was attributed to the internal curing properties of the high-absorption limestone aggregate.