| dc.description.abstract | The increased demand of Bangladeshi cement in construction industry has gained attention of
researchers, engineers and practitioners to understand the quality of cements. A number of
industries produce cement not only to meet the local demand but also export cement abroad.
The research aims to investigate the physical qualities of cements of different brands of
Bangladesh using experimental investigations. The physical properties of cement include
normal consistency, initial and final setting time, compressive strength of cement mortars,
compressive strength of cylindrical concrete, density, specific gravity and fineness of cement.
Standard tests were performed on cements manufactured by ten different industries of
Bangladesh. A total 300 tests samples on CEM II/B-M type representative cement samples
were prepared to conduct tests on those physical parameters as per ASTM specifications.
The experimental results obtained from this study were also analyzed to investigate the
statistical parameters. The results are compared with the ASTM guideline values and previous
available study. In addition, correlations are also developed to find relationships between
compressive strength of concrete and their age of curing. The influence of initial setting times
on concrete strength are also investigated. The experimental result shows that almost all the
samples meet the ASTM requirement that ultimately proves the good quality of Bangladeshi
Cements. Moreover, the results are compared with an existing study for some cases. The
comparison reveals that the quality of Bangladeshi cements has improved in last decade quite
significantly in terms of mechanical strength of concrete | en_US |
