Abstract
Polymer modified mortar system is defined as hydraulic cement combined at the time of mixing with organic polymers that are dispersed or re-dispersed in water, with or without aggregates. The compressive strength and flexural strength of polymer modified mortar obtained at early age are low and it required prolong curing period for the strength enhancement. In order to enhance the mechanical properties of cementitious mixture as well as its durability, hybridization of polymeric modifiers are applied into cementitious mixture specimens. Thus, this study is intended to examine the mechanical properties of hybrid polymer modified mortar system at various levels of polymeric modifier dosage; styrene-butadiene rubber (SBR) latex and epoxy resin. Laboratory tests for density, compressive strength and flexural strength were carried out to determine the strength of hybrid polymer modified mortar. In this study, the hybrid polymer of SBR latex with epoxy resin gives discontented results compared to unmodified cement system. The results of density, compressive strength and flexural strength of hybrid polymer modified cement system had shown negative outcomes and did not make any improvement to cement system.
Highlights
For the past few decades, multiple researches had taken place in the subject of polymer modified mortar, polymer mortar and polymer impregnated mortar
Polymer modified mortar can be defined as hydraulic cement system combined at the time of mixing with organic polymers which are dispersed in water, with or without the existence of aggregates [2]
Hybrid polymer modified mortar L obtained the lowest density which is 2140 kg/m3 compared to other mortar specimens
Summary
For the past few decades, multiple researches had taken place in the subject of polymer modified mortar, polymer mortar and polymer impregnated mortar. It should be pointed out that lowering the polymer to cement ratio has no major contributions of enhancing effects on strength and durability [3] They explained that the connections between the aggregates are very thin as if only an admixture for the cementitious material [4]. The dry condition promotes a polymer film formation due to the coalescence of polymer particles [12,13] They reported there is no improvement in flexural strength observed in the case of standard cured as long as no dry curing period is applied on the polymer modified mortar samples [14,15]. As soon as the polymer modified mortar samples exposed to dry environment for curing purpose, the film formation process would start immediately and build up through the entire binder phase [16]
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