Experimental Study on Self-compacting Geopolymer Mortar with Partial Replacement of River Sand by Slag, Artificial, Wash Sands

Abstract

This paper deals with the study of replace natural sand with different sand with the help of self-compacting geopolymer mortar. The increase in construction activities is leading to the depletion and the exploitation of the natural river sand, causing adverse effects on the environment. Therefore there is an urgent need to find an alternative substitute or replacement of natural river sand and the major factor in the global warming is production of cement which releases CO2 in the atmosphere. It is very necessary to reduce or replace the cement by other cementations material or industrial waste like fly ash. Geopolymer is a new development in the world of mortar in which cement is totally replaced by fly ash. experimental investigation has been carried out to study the effect of the different percentage of sand on compressive strength and geopolymer mortar. In this research some chemical admixture were used such as super plasticizer (sp), sodium silicate and 14 molar NaOH solution. The workability properties such as filling ability, passing ability and resistance to segregation assessed using mini slump flow and mini v-funnel test methods. It was found that the essential workability requirements for self-compacting according to EFNARC were satisfied. Results showed that the workability and compressive strength improved with the increase in super plasticizer dosage as well as by using different sand with different percentage also improved the compressive strength.