International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
A BRIEF STUDY ON THE STRENGTH PROPERTIES OF CONCRETE MODIFIED WITH SINTERED FLY ASH AGGREGATE AND PENTA BLENDED CEMENT WITH NANO IRON OXIDE 1S.
RAMESH REDDY, 2P.NAVYA SRI, 3Dr. V. BHASKAR DESAI
Professor, Dept of Civil Engineering, Brindavan Institute of Technology & Science, Kurnool, A.P and Research
1
Schloar , JNTUA College of Engineering, Anantapuram-515002, A.P. 2M.Tech 3Professor,
Student, JNTUA College of Engineering, Anantapuram – 515002, A.P
Dept. of Civil Engineering, JNTUA College of Engineering, Anantapuram-515002, A.P.
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Abstract: Effective usage of fly ash in concrete not only
1. Introduction
extends technical advantage to the properties of concrete
The management of coal fly ash produced by thermal
but also contributes to the environmental pollution control.
power stations is a major problem in many parts of the
Fly ash based light weight aggregate offer potential for large
world. However its generation tends to increase every
scale utilisation in the construction industry. However lack
year. India produces about 120 million tones of fly ash
of technology and absence of market have dissuaded Indian
annually. Although some fly ash is used in wide range of
entrepreneurs from producing Sintered fly ash aggregates.
applications particularly as a substitute for cement in
An attempt is being made to study the strength properties of
concrete, large amount of fly ash ie, about 75% of
modified M20 grade concrete by 100% replacement of
production remain unused and thus required disposal. Due
natural aggregates with Sintered fly ash aggregates. It is
to continuous usage of naturally available aggregates,
also proposed to replace 11% of cement with three numbers
within short length of time these natural resources get
of pozzolanic materials i.e., Silica fume, slag and fly ash in
depleted and it will be left nothing for future generations.
equal proportions along with varying percentages of Nano
The use fly ash for production of sintered fly ash light
Fe2O3 in spells of 0,0.5,1,1.5 and 2% on 11% of pozzolanic
weight aggregate is an appropriate step to minimize the
materials. The rate of the pozzolanic reaction is proportional
consumption of precious natural resources on one hand
to the amount of surface area available for reaction. i.e it is
and showing an alternate mode for disposal of ever
possible to add Nano Fe2O3 in order to improve the
increasing production of fly ash year by year. The fly ash is
characteristics of cement mortars. After 28days varies tests
mixed with limited amount of water and pellets were
were carried out on the modified complete with penta
formed through the technique of agglomeration and
blended cement i.e compressive strength test flexural
pelletizing and then sintered at a temperature of 10000C to
strength test, modulus of elasticity test, impact test, in plane
12000C .The fly ash may contain some unburnt coal which
shear strength through mode-II fracture test with and
may vary from 2 to 15 percent depending upon the
without admixtures.
efficiency of burning. The aim is always to make use of the
Key words: Sintered fly ash aggregates, admixtures,
fuel present in the fly ash and to avoid the use of extra fuel
concrete, iron oxide, various tests.
materials. The burning of carbon in the pellets and loss of
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