Int. J. Advanced Structures & Geotechnical Engineering
ISSN 2319-5347, ISI Impact Factor: 0.763
VOLUME 03 NO. 02 APRIL 2014:
Title: An
Experimental Study on the Strength of Mortar due to
Filler Effect of Pozzolanic Materials
Authors:
M. N. N. Khan, M. Jamil, A. B. M. A.
Kaish, M. F. M. Zain, M. R. Karim
Abstract:
The filler effect of pozzzolanic materials is
defined as proper arrangement of small particles into
the microstructure that fill the voids and contribute
towards improvement of compressive strength without any
chemical reaction. This effect of pozzolan plays a vital
role for the production of high strength mortar. The
filler
effect is dominating when pozzolan particles are in
chemically inactive form. The individual contribution of
physical and chemical effect in concrete and mortar
still not determined. Several studies have been found in
the published literature on finding the filler effect of
pozzolans by replacing cement with chemically inactive
materials which size is same as pozzolans. The
chemically inactive materials used in previous studies
are carbon black, limestone filler and ground river
sand, which used bigger range size of replacement
percentages (like 5%, 10%, 15% or 10%, 20%, 30%etc).
However in this study, lower range size of replacement
percentages (like 2.5%, 5%, 7.5% etc) were examined.
This is due to probabilities of peak value of
compressive strength due to filler effect may lie in
between two replacement percentages used in previous
studies. In order to determine the filler effect,
chemically inactive material (ground river sand) with
various particle sizes used as supplementary material of
cement to produce mortar specimens. Result shows that
compressive strength of ground river sand mortar at
smaller replacement percentages is very near to the
compressive strength of control mortar. The loss of
compressive strength indicates the only filler effect of
small size ground sand whereas pozzolanic effect was
inactive in the concrete microstructure.
Keywords:
Pozzolanic Materials, Filler Effect,
Replacement Percentages, Voids, Compressive Strength
Page No: 106-109