Influence of the air-entraining admixture with different superplasticizers on the freeze-thaw resistance of cement mortars; [Influenţa aditivului antrenor de aer combinat cu diferiti superplastifianţi asupra rezistenţei la îngheţ – dezgheţ a mortarelor de ciment]
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2016
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Abstract
Compatibility of different based superplasticizers with air-entraining admixture has been investigated. Physical and mechanical properties such as flow, setting time and compressive strength of cement mortars incorporating an air-entraining admixture (HS) with naphthalene sulfonate (SPNS) and modified polymer (SPMP) based admixtures have been determined. Also, the effects of their combinations on the freeze-thaw resistance of cement mortars have been determined. All admixtures are used with three different ratios and one of them is for overdosage effect. Results indicate that cement mortars having lowest early strength values are mortars incorporating 1.5% SPMP and 2.0% SPNS by mass of cement. The most effective series for the ultimate highest strength values were series with 0.05% HS and 0.8% SPMP. The freeze-thaw resistances of cement mortars were investigated for 50, 100, 150 and 200 freeze-thaw cycles. Indeed, the most effective series for freeze-thaw resistance were series with 0.05% HS and 0.8% SPMP. © 2016, Procema SA. All rights reserved.