| dc.description.abstract | It’s known to all that many countries are developing day by day with the running times of the whole
world and Bangladesh is one of them. For this development the construction of mega projects and
other different projects like school, college, industrial, commercial building etc. are carried out in
different sectors of Bangladesh. Capital city of Bangladesh, Dhaka has experienced a rapid growth
of urban population. Due to the scarcity of land in the city, it is indispensable to construct high rise
buildings to accommodate the population in the city. For construction of high rise buildings, high
strength concrete mix proportions are to be developed using the locally available construction
materials. With this objective, this study has been planned. Cylinder concrete specimens of diameter
100 mm and height 200 mm were made with same mix proportions (1:1.5:3) of concrete. The
variables that have been studied were W/C(0.40 to 0.450), cement content, sand-to-aggregate
volume ratio, type of cement (ordinary Portland cement, blended cement with different proportions
of fly ash, ground granulated blast furnace slag, and silica fume), different types of aggregates (stone
chips of different place) , aggregates properties (aggregate crushing value, Aggregate impact value
, Fineness Modulus ). Before making concrete specimens, a grading that gives maximum unit weight
of the aggregate, i.e., minimum void in aggregate was developed both for fine and coarse aggregates.
All aggregates were also investigated for unit weight, absorption capacity, and abrasion value. Fresh
concrete was tested for workability using a slump cone. In this study we collect five project concrete
cylinder test data and analysis that to find out which material is preferable for high strength concrete.
Concrete cylinder specimens were tested for compressive strength, at 28 days. The results revealed
that it is possible to get high strength of concrete using the locally available materials used in this
study. To achieve further strength, it is necessary to use good quality coarse aggregate with lower
value of abrasion. Keywords: Compressive strength, Water cement ratio, Mixing ratio, stone chips,
Aggregate crushing value, Aggregate impact value, Fineness Modulus | en_US |
