EFFECT OF SIZE OF COARSE AGGREGATE ON COMPRESSIVE
STRENGTH OF HIGH STRENGTH CONCERTS
31st Our World in Concrete and Structures (OWICs) - 2006
M. Yaqub*, University of Engineering and Technology Taxila, Pakistan.
Imran Bukhari, University of Engineering and Technology Taxila, Pakistan
High strength concrete high performance concrete, compressive strength,
This paper describes the influence of aggregate size on the compressive
strength of high strength concrete. High strength concrete is a type of high
performance concrete generally with a specified compressive strength of 40 Mpa
(6000psi) or greater. To investigate the effect of size of aggregate on the
compressive strength of high strength concrete an experimental program was carried
out in University of Engineering and Technology Taxila Pakistan. Five different sizes
of course aggregates were used while developing a mix design. The sizes of coarse
aggregate were 37.5mm, 25mm, 20mm, 10mm and 5 mm. Natural sand with
fineness modules of 3.48 was used as fine aggregate. Ordinary Portland cement
was used as binding material. Different trials of mixing of coarse aggregate were
made (37.5mm and 25mm, 25 mm and 20mm, 20mm and 10mm, 10mm and 5mm)
to investigate the influence of size of aggregate on compressive strength of concrete.
Cylinders of size 150mmx300mm were cast in laboratory and tested in Universal
compression testing machine. It was concluded that 10mm and 5mm aggregates
showed higher compressive strength than other types of aggregates.