Abstract
The transport properties of concrete- and mortar are important indicators of their durability, and may be correlated to their resistance to salt scaling. This work aims to optimize the transport properties of the high volume fly ash (HVFA) mortar in which 60% (by weight) Portland cement was replaced by Class C fly ash. Ten chemical admixtures (five non-polymers and five polymers) were investigated as waterproof admixtures for HVFA mortar. The compressive strength, splitting tensile strength water sorptivity and gas permeability of the mortar admixed with these chemical admixtures were investigated. The results showed that the non-polymer and polymer admixtures with different admixing dosages played different roles in HVFA mortar. This consequently resulted in different behavior in affecting the transport and mechanical properties of HVFA mortars.
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