Evaluation on the use of ordinary Portland and Portland pozzolana cements for structural Concrete production: The case of Dangote cement (Ethiopia) P.L.C.

Abstract

This study focuses on evaluating the use of the Dangote Ordinary Portland and Portland Pozolana cement for structural concrete production and its production processes of Dangote cement factory with special emphasis to its property as ingredient of structural concrete with regards to quality, eniviroment and minimization of structural cross sections However, most of the consultants who design structures are simply specifying the ingredients of concrete without enough description of type, reasonable content, and relations with other factors which have direct effect to the hydrolysis reaction of the cements. This and others are costing the country negatively. Anon-experimental survey and experimental test design employing a qualitative approach was used in in this investigation. The research Design in this Current inquiry involved two phases: data Collection and data analysis. The data Collection phase included examining the current literature to identify relevant background and collecting data from the factory. The data analysis phase distilled the findings of the laboratory test result of different classes of Concrete produced from each of cement type were Conducted and recorded at different ages. This research discuses results from analysis on the compressive strength test results and rate of gaining strength.by studying how each of the classes of Concrete produced by Ordinary Port land and Portland Pozolana Cement were compared, we found good strength development was observed especially in the high strength concrete, Strength up to54.75% and 58.06% in 3 days and 77.74% and 73.7% in 7 days relative to their28 days strength was possible using the Dangote Portland Pozolana Cements and Ordinary Port land Cement respectively. Further, we identifies that the OPC is best in high early Strength concrete production. And the PPC cannot produce a 28th day concrete compressive strength as high as that of the OPC .The study also identifies that carbon dioxide emitted more and costs higher than other greenhouse gases during per ton production of Portland cements.