COMPARATIVE ANALYSIS OF OPC BRANDS COMMONLY USED IN KURDISTAN REGION-IRAQ
Nowadays the brand of cement used in construction works is selected mostly on experience,
availability, and cost. This study aims to evaluate and compare the chemical and physical properties of
five brands of commercial ordinary Portland cement (OPC) available in the Kurdistan region, which are
(Mass, Delta, Kar, Mardin, and Şanliurfa). Several tests on each cement brand’s sample have been done in
the laboratory to analyze their properties according to British Standards (BS). The chemical composition
of the cement brands was analyzed by x-ray fluorescence method and the cement tests also include
(normal consistency, initial setting time, final setting time, soundness, loss of ignition, fineness, flexural
strength, and compressive strength). The effect of chemical composition on the mechanical properties also
studied. The results show that all samples have chemical contents within the acceptable limits. Şanliurfa
cement has the highest compressive strength at 28 days with 55.4 N/mm2
and it is about 27.7% more than
Kar cement, which has the lowest compressive strength of all tested cement brands. The MgO/SO3 ratio
results show that the Şanliurfa cement has the lowest ratio with 0.62 comparing with other cement brands
and this influences its compressive strength results. The (Mardin, Mass, Delta, and Kar) cement were
found to be classified as 42.5N class, these cement brands recommended to be used in bearing concrete
structural elements, commercial ready mix concrete plants, and rigid pavement construction work. On the
other hand, the study found that Şanliurfa cement classified as 52.5N class and it is recommended to use in high strength concrete
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