Study on the influence of organic polymers on the physical and mechanical properties of cement-based materials

Abstract

Four kinds of organic polymer emulsions of silicone acrylic, styrene-acrylic, waterborne epoxy and acrylic acid were selected and mixed into cement paste according to different poly-ash ratio, and experimental studies on their physical properties (fluidity and water-absorption rate) and mechanical properties (compressive strength, bending strength and bend-press ratio) were carried out. The results show that in terms of physical properties, only the waterborne epoxy emulsion improves the fluidity of the material, the four organic polymer emulsions reduce the water-absorption rate of the material, and the water-absorption rate of waterborne epoxy emulsion and styrene-acrylic emulsion decreases respectively by 61.8% and 51.5% at a poly-ash ratio of 0.15. In terms of mechanical properties, the four organic polymer emulsions fail to improve the compressive strength of the material, but the toughness of the material is improved. The waterborne epoxy emulsion has a 16.7% improvement in the bending strength at a poly-ash ratio of 0.2, and the styrene-acrylic emulsion has a 9.7% improvement in the bending strength at a poly-ash ratio of 0.15.