Document Type : Research Paper
1 Department of Chemistry, Faculty of Science, University of Misurata, Misurata, Libya
2 Department of Chemistry, Faculty of Education, University of Al-Asmarya, Zliten, Libya
3 Department of Chemistry, College of Nursing, University of Misurata, Misurata, Libya
4 Centre for Astrobiology and Extremophile Research, School of Life Sciences, University of Bradford, Bradford, BD7 1DP, United Kingdom
The quality of cement is one of the important factors which materially contribute to the strength and durability of structural concrete. Different brands of Portland cement are used in Libya by local contractors for various construction work. However, no comparative study has been made undertaken hitherto to investigate the mechanical and physical properties of the various brands of cement. This study investigates the fineness, soundness, setting time and compressive strength of Libyan cement manufactured by the national Libda, Al-Koms, Al-mergeb and Al- borg plants and also some imported cements sold in the Libyan market. All brands of cement tested have normal and acceptable consistencies. The soundness values for all the brands tested fall below the maximum allowable value of 10 mm. Fineness values for all the brands tested fall within the standard specification limit (2500 cm2 /g <). Based on the results of compressive strengths alone , all the cements could be acceptable for normal construction work.
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