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Utilization of Phosphogypsum in Cement Concrete Pavement

Author(s):

Purnima Tripathi , BBDU University,Lucknow,India; Bilal Siddiqui, BBDU University,Lucknow,India

Keywords:

Ordinary Portland Cement, Phosphogypsum, By Product, Concrete, Compressive Strength

Abstract

Use of industrial by-products as construction material can help to achieve sustainability in this industry. The rapid increase in construction activities leads to massive shortage of conventional construction materials such as cement, fine aggregate and coarse aggregate. Phosphogypsum is a solid by-product material resulting from the production of phosphoric acid, a major constituent of many fertilizers. It has been estimated that more than 800 m1lhon ton of phosphogypsum are stockpiled in the U.S. The current production rare exceed 60 million tons per year, with less than 11.2 percent being recycled at the present time. Alternatively, disposal of these materials in the form of landfill also need huge land area although environmental hazard concern from these activities has been raised by researches. The material has therefore, tried to incorporate in cement manufacturing considering its sustainable use. Phosphogypsum could be used as a substitute of natural gypsum in the production of Portland cement to control the hydration reaction rate of cement. develop phosphogypsum as a road base material are presented. The research program included physical and chemical characterization of the phosphogypsum. mineralogical analysis moisture-density relation unconfined compressive Strength testing freeze-thaw and wet-dry durability tests and expansion testing. The result shows that the strength of concrete increased as percentage of phophogypsum replacement increased up to certain percentage.

Other Details

Paper ID: IJSRDV7I21264
Published in: Volume : 7, Issue : 2
Publication Date: 01/05/2019
Page(s): 1723-1726

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