Experimental Study of Mechanical Properties of Geopolymeric Mortars Containing Slag, Kaolin Powder and Polymer

Document Type : Original Article

Authors

1 Department of Civil Engineering, Technical Faculty, University of Giulan, Rasht, Iran

2 Structural Engineering, Department of Civil Engineering, Faculty of Engineering, University of Guilan,, Rasht, Iran.

Abstract

Considering the high consumption of mortar and concrete, in structures, and the increasing demand for cement production, it seems necessary to pay attention to the harmful environmental effects of this material. This research aims to investigate the effect of kaolin ceramic powder, blast furnace slag and styrene butadiene rubber polymer on the mechanical properties of geopolymer concrete. In this laboratory research, kaolin powder and slag with different percentages as well as polymer have been used. In order to achieve the goals, samples of 12 mixing plans were subjected to various tests such as compressive strength, flexure, tensile strength, modulus of elasticity, setting time of concrete and scanning electron microscope microstructure examination. The use of polymer in the 7and28 day compressive strength test in the BS8 design sample compared to the S4 control design improved the strength of the samples by 15% and 24%, respectively. In the tensile test of the SC50-4 mixing design sample (2.79 Mpa) compared to the control S4 design sample (2.63 Mpa), the strength of the sample improved by 6%. In the flexural strength test, no significant difference was observed between the S4 design sample and the BS8 design sample. by testing microstructure in samples containing 75% kaolin powder compared to samples containing 50% kaolin powder due to Agglomeration of nanoparticles, a drop in mechanical properties was observed in them, which is due to the accumulation of nanoparticles in this weight percentage.

Keywords

References

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