Physical and Mechanical Properties of Cement Mortar Modified with Rubber Latex

Last modified: August 18, 2018
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Author: Pheerawat Plangoen   E-mail:  pheerawat.pla@siam.edu

Department: Department of Civil Engineering, Siam University, Petchkasem Road, Phasi Chareon, Bangkok, 10160

Published: The 23rd National Convention on Civil Engineering July 18-20, 2018, Nakhon Nayok, Thailand,THAILAND

Website: –


Abstract

The aim of this research was to study of physical and mechanical properties of cement mortar modified with rubber latex. The aim regarding physical property is to consider the consistency of cement paste, setting time of cement paste, water absorption, and microstructure by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). While the aim regarding mechanical property is to consider the compressive strength, tensile strength and flexural strength of mortar mixed with rubber latex and the strength of the structure was tested
after 28 days. To test the performance polymer cement ratio (P/C) were mixed in different proportions of 0%, 1%, 3% and 5% by weight to prepare the solution. Water and cement were mixed in the proportion of 0.50 (w/c) and cement sand ratio 1:2 by weighting. The results of study shown that initial setting time of cement paste mixed with rubber latex at polymer cement ratio (P/C) 0%, 1%, 3% and 5% with 128, 123, 75, and 35 minutes and water absorption 5.85%, 3.46%, 4.68% and 5.35% respectively. Based on the mechanical properties of mortar modified with rubber
latex, it was found that the proper mixing of rubber latex in mortar gave high strength properties when compared with standard mortar (P/C = 0%). The experiment of mechanical properties of mortar modified rubber latex showed that the polymer cement ratio (P/C) of 1% gives the best performance with 375 ksc of compressive strength, 39 ksc of tensile strength and 65 ksc of flexural strength. Based on the results of this
study, polymer cement ratio (P/C) of 1% by weight is most recommended to be used with various types of mortar structures such as ferro-cement water tank and ferro-cement ditch lining.

Keywords: mortar, rubber latex, mechanical properties, microstructure

mortar, rubber latex, mechanical properties, microstructure

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