Partial Replacement Of Natural River Sand With Crushed Rock Sand In Concrete Production
Date
2013Author
Manguriu, GN
Karugu, CK
Oyawa, WO
Obuodha, SO
Mulu, PU
Language
enMetadata
Show full item recordAbstract
The use of crushed rock sand as a partial replacement of river sand in concrete production was
investigated. Water cement ratio varied between 0.55
and 0.59 for 0
% to 100
% natural sand
replacement. The slump ranged between 49 and 60
mm for 0
% to 100
% natural sand replacement.
The average compressive strength of the control concrete (C20) was 22.5
N/mm
2
. The effective
natural sand (RS) replacement
ranged between 0 and 60
% with the best results achieved at 20
%
replacement. The peak compressive strength and indirect tensile strength values of 23.2
N/mm
2
and
1.42
N/mm
2
respectively were obtained. Modulus of elasticity of concrete increased from 22
KN
/mm
2
to 23
KN/mm
2
with 20
% replacement of
natural sand. Also, the indirect tensile strength increased
from 1.28
N/mm
2
to 1.42
N/mm
2
with 20
% river sand replacement. The beam deflection ranged
between 0.25
mm
and 0.4
mm with the lowest deflection recorde
d
at 20
% CRS and highest
deflection of 0.4
mm
with the control mix (0
%
CRS). The whole range of natural sand replacement
(0 to 100
%) improved the beam deflection. The 20
% CRS content recorded the highest flexural
strength of 686.7
N/mm
2
beyond which th
e strength decreased to 80
% CRS after which there was a
constant value in strength up to 100
% CRS
URI
http://hdl.handle.net/11295/71788http://www.getview.org/PARTIAL%20REPLACEMENT%20OF%20NATURAL%20RIVER%20SAND%20WITH%20CRUSHED%20ROCK%20SAND%20IN%20CONCRETE%20PRODUCTION.pdf
Citation
MANGURIU, G., KARUGU, C., OYAWA, W., ABUODHA, S., & MULU, P. (2013). PARTIAL REPLACEMENT OF NATURAL RIVER SAND WITH CRUSHED ROCK SAND IN CONCRETE PRODUCTION.Publisher
University of Nairobi,