ENGINEERING PROPERTIES OF GEOPOLYMER CONCRETE BASED ON ALKALI ACTIVATED NATURAL POZZOLAN

The development of alkali activated binders with superior enineering properties and longer durability have emerged as an alternative to OPC. It is possible to use alkali-activated natural pozzolans to synthesize environmental friendly sound geopolymeric cementitious construction materials. The main benefit of geopolymeric cement is the reduction in environmental impact in harmony with the concept of sustainable development. This paper presents a comprehensive summary of the extensive studies conducted on the results of experimental investigations on the engineering properties of geo-polymer concrete using activated Iranian natural pozzolan namely, Taftan. Experimental work was conducted to determine mechanical strength; modulus of elasticity; ultrasonic pulse velocity and shrinkage of different concrete mixtures. Test data are used to identify the effects of salient factors such as water to binder ratios and curing conditions that influence the properties of the geopolymer concrete. The results show that mortar and concrete made with alkali activated natural pozzolan develop moderate to high mechanical strength and modulus of elasticity and shrink much less than ordinary Portland cement (OPC) concrete.

کلیدواژه ها:

alkali-activated binder ، geopolymeric cement ، natural pozzolan