Study on properties of PB-g-PS latex-modified cement mortars
The PB-g-PS latex was used to modify cement mortar, and the weight ratios of polybutadiene to styrene ranged from 70/30, 50/50 to 30/70. In the constant water-cement ratio of 0.5, and curing 24h at 20°C, RH90% air followed by 27d at 20°Cwater. This study examines the effects of weight ratios polybutadiene to styrene and the polymer-cement ratios on the flow, compressive and flexural strength and water absorption rate of PB-g-PS latex modified cement mortar. The experimental results show that the flow of modified mortar is increased with increasing polymer-cement ratios and decreasing weight ratios of polybutadiene to styrene, PB-g-PS latex can markedly reduce capillary water absorption rate. The minimum is 1.33Kg/m2. PB-g-PS latex can marked influences much on the mechanical properties of modified mortars. The compressive of the polymer modified mortar decreased, and the flexural strength of polymer modified mortar decreased as well. Overview on, PB-g-PS latex can be incorporated into cement mortars as cement modifier.
Polymer-modified cement mortars: Their enhanced properties, applications, prospects, and challenges
Abstract Polymer-modified cement mortar (PMCM) composite materials have drawn the attention of researchers worldwide because of their excellent capabilities such as crack resistance, durability, simple construction process, and cost-effectiveness. This paper investigates current research on the enhancement effect of adding polymers in ordinary cement mortar (OCM) composites. The main study areas include material fabrication, workability, mechanical properties, durability, microstructure, and application of PMCM composite materials. Literature research shows that the properties of OCM could be improved significantly with the variation of polymer types and concentrations in the composition of PMCM, making PMCM versatile in applications. Compared with OCM, PMCM has enhanced crack resistance, impermeability, and durability with the addition of polymers. Finally, this paper introduces the application of PMCM, and discusses the prospects and challenges of PMCM composite materials.
Studies of Regression in a Transplantable Tumor in Mice *
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