Page 1 of 4
European Journal of Business &
Social Sciences
Available at https://ejbss.org/
ISSN: 2235-767X
Volume 07 Issue 05
May 2019
Available online:https://ejbss.org/ P a g e | 791
Experimental studies on ac pipes for Axialload carrying capacity
S. NATARAJAN
DEPARTMENT OF CIVIL ENGINEERING
PRIST (Deemed to be University), THANJAVUR.
ABSTRACT
All countries are focusing on sustainable technology that can be economical and adopted for the
use of concrete in a better way. Concrete is most widely used construction material and it
possesses very low tensile strength, low shear strength and brittle characteristics. In order to
improve these properties a relatively new construction material developed through extensive
research and development work called Fibre Reinforced Concrete (FRC). An attempt has been
made to analyse the effect of addition of asbestos fibre in ordinary Portland cement concrete at
their optimum proportions. To determine the properties concrete compressive strength and
flexural strength test were performed at different test age like 7, 14 and 28 days. M 30 grade
concrete was designed as per IS 10262-2009. The additions offibre were varying from 0.33%,
0.66%, 1.0%, 1.33%, 1.66% and 2.0% by volume of concrete for AFRC. The maximum
compressive strength of AFRC obtained at 0.33% addition of fibre. Test results shows that the
compressive strength of AFRC marginally improved, but there is a significant improvement in
the flexural strength.
INTRODUCTION
Plain concrete, regularly known as concrete,
is a cosyblend of binding material, fine
aggregate, coarse aggregate and water. This
can be effectively formed to sought shape
andsize before it loses pliancy and solidifies.
Plain concrete is strong in compression yet
exceptionally feeble in tension. The tensile
property is presented in concrete by
draftingdiverse materials and this endeavour
has offered ascend to RCC, RBC, PSC,
FRC, ACF cellcement and Ferro concrete.
Concrete is one of the widely used
construction materials for structures.
Cement concrete isan artificial stone
produced by hardening mixture of cement,
sand, stone chips and water.Since cement
concrete is very good in compression but
Page 2 of 4
European Journal of Business &
Social Sciences
Available at https://ejbss.org/
ISSN: 2235-767X
Volume 07 Issue 05
May 2019
Available online:https://ejbss.org/ P a g e | 792
weak in tension, steel reinforcementare to be
provided in tension zone. The low tensile
strength and brittle character of
concretehave been bypassed. Such
combination of concrete and steel is called
Reinforced Cement Concrete (RCC).
The inclusion of small fraction (usually 0.5
to 2% by volume) of short fibers to the
concrete, mortar and cement paste can
enhance many of the engineering properties
of basic materials such as fracture
toughness, flexural strength and resistance to
fatigue, impact and spalling.
The incorporation of fibers into concrete has
been found to improve several properties
primarily cracking resistance, impact and
wear resistance and ductility. For this
reason, Fiber Reinforced Concrete (FRC) is
now being used in increasing amounts in
structures such as airport pavements,
highway overlays, bridge decks and machine
foundations.
Results And Discussion
From the table it is observed that the desired
slump value is obtained for trial 2 at water
cement ratio = 0.45. (For standard m-25mix)
Hence we fix it as the design ratio. Trial 1
and 3 yielded very low and very high slump
values which may be either due to
inadequate pasteavailable for binding the
mix or due to improper mixing procedure.
Compressive Strength Test Results
The property like Compressive Strength at
hardened state of AFRC at the age of 7, 14
and 28days evaluated by using automatic
compressive strength testing machine by
applying the loadat the side faces of cube as
they were cast in the mould. Three cubes for
each percent at Different test age has tested
to determine the average compressive
strength for, AFRC.
Effect Of The Fibre Parameters On The
Tensile Strengths
The tensile strength of the steel fibre
reinforced concrete mixes after 28
d.
Unlike the compressive strength of the
SFRC, more pronounced increase inthe
tensile strength of the concrete with the
addition of fibres was observed, with the
valuesof 11% and 47% for 0.5% and 1.5%
fibre contents, respectively, at 28
d. The
direct tensilestrength and the fibre content
relationships for different concrete strengths.
It has been observed that the tensile
strengths increased linearly with an increase
Page 3 of 4
European Journal of Business &
Social Sciences
Available at https://ejbss.org/
ISSN: 2235-767X
Volume 07 Issue 05
May 2019
Available online:https://ejbss.org/ P a g e | 793
in thefibre content. The tensile strength of
concrete with lower water-to-cement ratio
has shown areduced increase in the tensile
strength of about 31%, whereas the concrete
with higherwater-to-cement ratio shows
enhancement in the tensile strength of about
47% in the F15L60
mix, which may be due to arresting of the
cracks. The tensile strength of the concrete
hasincreased linearly with an increase in the
fibre content for all water-to-cement ratios.
Theenhancement in tensile strength was
more pronounced in the concrete with lesser
strength, showing to the decreased
toughness of the matrix and occurrence of
crack arrest through fibrebridging. The
benefit of the fibre for the enhancement in
the tensile strength of concrete isdependent
upon the crack arrest and the fibre
transferring energy.
Conclusion
1. Compressive strength and flexural
strength of AFRC initially increases with
addition offibre. Further addition of fibre
beyond a particular percent, decreases the
compressivestrength and flexural strength.
2. Flexural strength was increased
considerably with fibre reinforcement in
case of AFRC.
3. In case of addition of asbestos fibre by
volume fraction there is increase in
compressivestrength at 0.33% and further
addition of asbestos fibre beyond 0.33%
decreases thecompressive strength of AFRC.
4. The flexural strength of AFRC at 0.33%
and 0.66% increases continuously, further
addition of asbestos fibre after 0.66% the
flexural strength decreases.
References
1. Jones F. E. (1974), ―Weathering Test on
Asbestos Cement Roofing Material
,
Building Research Technical paper No. 29,
H.M.S.O., London.
2. Jothi D. (2008), ―Application of Fibre
Reinforcement Concrete Technique in Civil
Constructions
, African International
Multi-Disciplinary Journal, Vol-2, pp.157-
172.
3. Majumdar A. J. and Nurse R. W. (1974),
―Glass Fibre Reinforcement Cement
,
Building Research Establishment current
paper, CP79/84, England.
4. Opoczky L. and Pentek (1975),
―Investigation of the Corrosion of Asbestos
