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IJSTR >> Volume 5 - Issue 7, July 2016 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Manufacture Of Pozzolanic Cement From RFCC Spent Catalyst In Khartoum Refinery

[Full Text]

 

AUTHOR(S)

Husam E Mustafa, Gurashi A Gasmelseed

 

KEYWORDS

Compressive strength, Pozzolanic Cement, Residual fluidized Catalytic cracking unit, Spent Catalyst.

 

ABSTRACT

Pozzolana is defined as Siliceous and aluminous material which reacts with calcium hydroxide in presence of water at room temperature to form strong slow-hardening cement. Pozzolana has the advantage of reduction of leachibility of calcium hydroxide liberated during the setting and hydration of cement. In Khartoum Refinery five to ten tons per week of spent catalyst are produced in fine powder, this quantity is sent to dumping sites or landfills. In this study pilot experiments were successfully carried out at different ratios to produce cement. The RFCC spent catalyst samples were subjected to chemical analysis to determine the content of Al2O3, SiO3,TiO3, CaO and V2O5 …..etc. These were found to be 49.5, 41.1, 0.32, 1.4 and 0.09 percent respectively, other compounds are, Na2O, MgO, P2O5,SO3, K2O, MnO,Fe2O3,Co3O4 and NiO2 with. It is found that the percentages of SiO2, Al2O3, and Fe2O3 amount up to 91.5% that is above the ASTM standard C618:2003 which stipulated that the minimum of such compound is 70 %. Physical properties of RFCC spent catalyst were also carried out including, crystallinity and Pozzolanicity index. The cement produced was tested for compressive strength, consistency and setting time .It is concluded that RFCC spent catalyst in Khartoum Refinery is a Pozzolanic material and up to 30% replacement from Portland cement (blended cement) complies with the Sudanese and European Standards No SSMO 3998:2011and EN-197-1:1992 respectively. The study shows that the compressive strength of blended Pozzolanic cements decreases with increasing Pozzolana content. From the foregoing, it is recommended to use RFCC spent catalyst with Portland cement as blended cement to produce mortars for construction and concrete.

 

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