DSpace Collection: Journal ArticlesJournal Articleshttp://repository.fuoye.edu.ng:80/handle/123456789/622024-03-25T03:35:29Z2024-03-25T03:35:29ZLimit State Design of Reinforced Concrete Structural ElementsFapohunda, Christopherhttp://repository.fuoye.edu.ng:80/handle/123456789/14632019-10-10T15:01:19Z2019-03-05T00:00:00ZTitle: Limit State Design of Reinforced Concrete Structural Elements
Authors: Fapohunda, Christopher2019-03-05T00:00:00ZLow-Cost Construction Through The Use Of Pulverized Bone Foamed Aerated Concrete (PB-FAC)Falade, FunsoIkponmwosa, EfeFapohunda, Christopherhttp://repository.fuoye.edu.ng:80/handle/123456789/11062015-10-11T15:43:08Z2013-01-01T00:00:00ZTitle: Low-Cost Construction Through The Use Of Pulverized Bone Foamed Aerated Concrete (PB-FAC)
Authors: Falade, Funso; Ikponmwosa, Efe; Fapohunda, Christopher
Abstract: Provision of affordable housing especially for low-income earners, which forms the majority of the population,
continues to be elusive in the nations of world. The major reason given for this is the high cost of building and
construction materials. Concrete and concrete products constitute the major building construction materials.
However, cement which is the main binder in concrete production has been identified as the major contributor to
increasing high cost of construction. This paper presents the results of investigation conducted to assess the
structural suitability and adequacy, as well as affordability of using pulverized bone as partial replacement of
cement in the production of foamed aerated concrete (PB-FAC) for low-cost building and construction purposes
using Nigeria as a case study. The parameters investigated, in accordance with relevant standards, are:
workability, density, compressive strength, tensile strength, and water absorption capacity. Cost comparison with
equivalent concrete of equal strength was also carried out. The results showed adequate strength and water
absorption capacity, as well as cost reduction of up to 36% at 20% cement replacement with pulverized bone. It
is concluded that the use of pulverized bone foamed aerated concrete (PB-FAC) can be used as a strong and
affordable building and construction material.2013-01-01T00:00:00ZEnvironmental Benefits of the Structural Use of Pulverised Bone in the Production of Foamed Aerated ConcreteFalade, FunsoIkponmwosa, EfeFapohunda, Christopherhttp://repository.fuoye.edu.ng:80/handle/123456789/11052015-10-11T15:38:01Z2013-01-01T00:00:00ZTitle: Environmental Benefits of the Structural Use of Pulverised Bone in the Production of Foamed Aerated Concrete
Authors: Falade, Funso; Ikponmwosa, Efe; Fapohunda, Christopher
Abstract: Disposal of wastes resulting from myriads of human activities continues to be a problem especially in
developing nations, where effective and efficient wastes disposal system is lacking. This paper presents the
result of the study conducted to investigate the environmental benefits of using pulverized bone - obtained from
bones generated as waste from abattoirs and slaughter slabs - in the production of structural foamed aerated
concrete. Some of the properties investigated into are consistency, workability, compressive strength, tensile
strength, and water absorption capacity. The results showed that foamed aerated concrete containing up to 20%
cement replacement with pulverized bone developed adequate strength acceptable to standards, for use for
construction purposes. It is thus concluded that the use of pulverized bone in concrete production will help clean
the environment of potentially hazardous wastes and bring about a significant reduction in use of non-renewable
resources. This finding highlights the opportunity that the foamed aerated concrete production provides a mean
of efficient and innovative waste management strategy.2013-01-01T00:00:00Z28-Day Strength Predicting Model for Foamed Aerated Concrete Containing Pulverized bone as a Partial Replacement of CementIkponmwoas, EfeFalade, FunsoFapohunda, Christopherhttp://repository.fuoye.edu.ng:80/handle/123456789/11042015-10-11T15:32:57Z2013-01-01T00:00:00ZTitle: 28-Day Strength Predicting Model for Foamed Aerated Concrete Containing Pulverized bone as a Partial Replacement of Cement
Authors: Ikponmwoas, Efe; Falade, Funso; Fapohunda, Christopher
Abstract: This paper presents the results of a mathematical model developed for predicting the 28-day
compressive strength of foamed aerated concrete containing pulverised bone as partial replacement of
cement for the purpose of quality controls. Strength-porosity relation was used as a basis for the
development of the model, and the Bisection Methods of Numerical analysis was used to evaluate the
inherent constants. For all the percentages of cement replacement with pulverised bone, the experimental
strength values compare well with those of the model. It can thus be concluded that the model is valid for
foamed aerated concrete with and without pulverized bone. The model has been validated up to 20%
replacement of cement with pulverised bone.2013-01-01T00:00:00ZFlexural Performance of Foamed Aerated Concrete Containing Pulverized Bone as Partial Replacement of CementFalade, FunsoIkponmwosa, EfeFapohunda, Christopherhttp://repository.fuoye.edu.ng:80/handle/123456789/11032015-10-11T15:25:58Z2014-01-01T00:00:00ZTitle: Flexural Performance of Foamed Aerated Concrete Containing Pulverized Bone as Partial Replacement of Cement
Authors: Falade, Funso; Ikponmwosa, Efe; Fapohunda, Christopher
Abstract: This paper presents the results of a study conducted to investigate the flexural behaviour
of foam concrete containing pulverised bone as partial replacement of cement. A total of sixty
reinforced beams (150×150×750 mm) were used to investigate the flexural behaviour of the
specimens. For reinforcement of the beams, hot-rolled, deformed 10-mm-diameter bars with yield
and ultimate stresses of 478.10 N/mm2 and 710.81 N/mm2 respectively were used. The cement
constituent of the mix was partly replaced with up to 20% of pulverised bone. The flexural
parameters investigated are crack formation and its pattern, failure mode, ultimate load, theoretical
and experimental ultimate moments, deflection and stiffness. From the results of this investigation, it
is concluded that the provision of the design standard in relation to shear and flexural design of
beams can be considered as adequate for the design of reinforced foam concrete. It is further
concluded that the stiffness is not affected by the inclusion of pulverised bone in the mix at up to
15% cement replacement level, and neither is the deflection pattern of the uncracked sections of the
specimens affected by the inclusion of pulverised bone. The bending moments of the specimens,
however, decreased with increase in pulverised bone.2014-01-01T00:00:00ZSome Properties of Concrete Containing AluminumFapohunda, ChristopherOyelade, AkintoyeAjibade, Charleshttp://repository.fuoye.edu.ng:80/handle/123456789/11022015-10-11T15:19:59Z2014-01-01T00:00:00ZTitle: Some Properties of Concrete Containing Aluminum
Authors: Fapohunda, Christopher; Oyelade, Akintoye; Ajibade, Charles
Abstract: This paper presents the results of investigation conducted to evaluate the properties of concrete containing
aluminum Roofing Sheet Waste as partial replacement of cement by weight. The properties investigated included the setting
times of cement-ARSW paste, workability, density, compressive strength using 168 numbers of 150 x 150 x 150 mm cube
specimens. The chemical compositions and pozzolanic properties were also investigated. The results showed that: (I.) the
chemical composition of aluminum Roofing Sheet Waste (ARSW) is suitable for concrete production, (ii.) ARSW has
pozzolanic characteristic, (iii.) the concrete produced with ARSW resulted in concrete whose densities are within the range
for normal weight concrete, and (iv.) using ARSW to replace cement up to 10% will not affect the compressive strength of the
concrete significantly. From these results, it can be concluded that Roofing Sheet Waste is suitable for concrete production,
and thus can be used as a mean to remove the potentially harmful waste that ARSW constitutes.2014-01-01T00:00:00ZFlexural Performance Of Bamboo-Reinforced Foamed Aerated Concrete BeamsIkponmwosa, EfeFalade, FunsoFapohunda, ChristopherAransiola, Jameshttp://repository.fuoye.edu.ng:80/handle/123456789/11012015-10-11T15:13:08Z2014-01-01T00:00:00ZTitle: Flexural Performance Of Bamboo-Reinforced Foamed Aerated Concrete Beams
Authors: Ikponmwosa, Efe; Falade, Funso; Fapohunda, Christopher; Aransiola, James
Abstract: This study reports the results of investigation conducted to evaluate the performance of foamed aerated concrete
beams with bamboo as the tensile reinforcement. The flexural parameters assessed were, load-deflection behaviour, failure
mode, and flexural moments. Its density and compressive strength were also investigated. Foamed aerated concrete made
from cement-sand ratio of 1:3 with foaming agent to water ratio of 1:33 was prepared. Twelve 150x150x150mm cube
specimens were tested for compressive strength at different curing ages of 7, 21, 28 and 45days. Three sets of 12 beams of
225 x 225 x 2350 mm containing bamboo as reinforcement were tested for flexural strength. The first, second and third set
respectively had 2, 4, and 6 numbers of 10 mm x 10 mm bamboo as reinforcement. For the cube specimens tested, the
compressive strength increased with curing age. The flexural moments of beams increased with increase in the percentage of
bamboo strip reinforcement and curing age. All the beams exhibit flexurfal failure. The deflection decreased with increase in
the area of bamboo splints as tensile reinforcement, but failure load decreased with increase in area of bamboo in the tension
zone. It can be concluded that inclusion of bamboo splints as reinforcement in tension zone improved the flexural
performance of foamed aerated concrete.2014-01-01T00:00:00ZFlexural Performance of Bamboo Reinforced Foamed AeratedIkponmwosa, EfeFalade, FunsoFapohunda, ChristopherOkosun, Jameshttp://repository.fuoye.edu.ng:80/handle/123456789/10932015-09-29T13:32:28Z2014-01-01T00:00:00ZTitle: Flexural Performance of Bamboo Reinforced Foamed Aerated
Authors: Ikponmwosa, Efe; Falade, Funso; Fapohunda, Christopher; Okosun, James
Abstract: The results of investigation conducted to evaluate the flexural performance of foamed aerated concrete beams with bamboo splints as tensile
reinforcement, but with and without shear links are reported in this paper. The properties assessed are: density, compressive strength, crack pattern, deflection,
and failure and moments. Foamed aerated concrete, having a cement-sand ratio of 1:3 was prepared. For foam generation, foaming agent and water in the
ratio of 1:33 was prepared. A total of seventy two numbers of 225 x 225 x 2350 mm beam specimens with bamboo splints as reinforcement, with and without
shear links and compression reinforcement were tested for flexural strength. For the shear links, 8mm diameter steel reinforcement at 150 mm centres was
used. The specimens were tested at 7, 21, 28 and 45 days of curing. The results showed that beams specimens without compression and shear reinforcement
exhibit shear failure while the beam specimens with compression and shear reinforcement displayed flexural failure. Larger deflection was recorded for beams
without compression and shear reinforcement than for beam specimens with compression and shear reinforcement. Also beam specimens with compression
and shear reinforcement developed higher moment than specimens without compression reinforcement. From the results of the investigations, it can be conclude
that specimens with compression reinforcement in the compression zone displayed a better flexural performance than specimens without compression
reinforcement in the compression zone.2014-01-01T00:00:00ZEffect of Foam Concentration on Structural Characteristics of Steel ReinforcedFalade, FunsoIkponmwosa, EfeFapohunda, ChristopherAkinniyi, ToyinOlori, Kehindehttp://repository.fuoye.edu.ng:80/handle/123456789/10922015-09-28T14:50:34Z2014-01-01T00:00:00ZTitle: Effect of Foam Concentration on Structural Characteristics of Steel Reinforced
Authors: Falade, Funso; Ikponmwosa, Efe; Fapohunda, Christopher; Akinniyi, Toyin; Olori, Kehinde
Abstract: This work presents the results of investigation
conducted to evaluate the effect of foam
concentration on the structural properties of steelreinforced
foamed aerated concrete beams. The
properties investigated were the density,
compressive strength, shear strength, and flexural
strength. Relationships between compressive
strengths and densities were developed, as well
as comparison between the compressive
strengths and the shear strengths. The foam
concentrate/water ratios adopted in this
investigation are 1:20, 1:25, 1:29, 1:33, 1:40, and
1:50. For the compressive strength and the dry
density determinations, 150 x 150 x 150 mm cube
specimens were cast and tested; and 225 x 225 x
2300 mm reinforced beam specimens were used
for the shear and flexural strengths tests.
The results of the investigation shows that: (i) a
reduction in foam concentration through the use of
higher foaming agent to water ratio resulted in
decrease in density, decrease in compressive
strength and increased in deflection. (ii) there was
increase compressive strength, density with
curing ages at all foamed concentrations (iii) the
relationship between the compressive strength
and the density of the specimens were observed
to be linear for all the foam concentrations, (iv) the
mathematical expressions developed between the
compressive strengths and the densities for the
different foam concentration can be considered
valid for the specimens used in this work, and (v)
the shear strengths developed by the beam
specimens used in this investigation were
between 13.15% and 20% of the compressive
strengths.2014-01-01T00:00:00ZFlexural Behavior of Reinforced Concrete Beams Containing Polyvinyl Waste Powder (PWP) as Replacement of CementIkponmwosa, EfeFapohunda, ChristopherAniebona, EmekaLasoju, Folashadehttp://repository.fuoye.edu.ng:80/handle/123456789/10912015-09-28T14:43:44Z2014-01-01T00:00:00ZTitle: Flexural Behavior of Reinforced Concrete Beams Containing Polyvinyl Waste Powder (PWP) as Replacement of Cement
Authors: Ikponmwosa, Efe; Fapohunda, Christopher; Aniebona, Emeka; Lasoju, Folashade
Abstract: The flexural performance of reinforced concrete
beam specimens with polyvinyl waste powder
(PWP) as partial replacement of cement is
reported in this paper. Cement was replaced with
PWP up to 50% by weight at intervals of 10%.
The flexural parameters investigated were: the
failure patterns, load-deflection characteristics,
stiffness, and ultimate moments. The reinforced
beam specimens used were 150 x 150 x 1000
mm, and tests were done at the curing age of 28
days. The results showed that: (i) the failure
pattern is a combination of flexure and diagonal
tension shear failure, (ii) the deflection
characteristics of beam specimens improved
progressively as the level of cement replacement
with polyvinyl waste increased, (iii) reduction in
the stiffness of the beam specimens as the
percent cement replacement with polyvinyl wastes
increased, and (iv) ultimate moments of beam
specimens increased with percent replacement of
cement with polyvinyl waste up to 20% level.2014-01-01T00:00:00ZStructural behaviour of bamboo-reinforced foamedIkponmwosa, EfeFapohunda, ChrsitopherKolajo, OEyo, Ohttp://repository.fuoye.edu.ng:80/handle/123456789/10902015-09-28T14:34:19Z2015-01-01T00:00:00ZTitle: Structural behaviour of bamboo-reinforced foamed
Authors: Ikponmwosa, Efe; Fapohunda, Chrsitopher; Kolajo, O; Eyo, O
Abstract: This paper reports the findings of experimental study to investigate the structural behaviour
of bamboo-reinforced foamed concrete slab with polyvinyl waste as partial replacement of
fine aggregates. The structural properties studied were: compressive strength, density, crack development
pattern and propagation, failure pattern, load–deflection characteristics and the ultimate
moment. Compressive strength and the density tests were also conducted using 150·150·150
cube specimens. The flexural behaviour was investigated by using 1300·500·100mm slab specimens.
The results showed that: (i) partial replacement of sand with polyvinyl waste (PW) improved
the compressive strength of the foamed aerated concrete specimens, (ii) that slab specimens with
polyvinyl waste as partial replacement sand exhibited shear bending failure, (iii) all the slab specimens
with polyvinyl waste as partial replacement sand recorded lower values of deflection for the
same loading, as the level of sand replacement with polyvinyl wastes increased, and (iv) increase in
theamountofsandreplacedwithpolyvinylwastesresultedinimprovedbendingperformanceofthe
slab specimens.2015-01-01T00:00:00ZEffect of Blast Furnace Slag on Chloride Permeability of Concrete Cured at Elevated TemperaturesFapohunda, Christopherhttp://repository.fuoye.edu.ng:80/handle/123456789/10892015-09-28T13:54:07Z2010-01-01T00:00:00ZTitle: Effect of Blast Furnace Slag on Chloride Permeability of Concrete Cured at Elevated Temperatures
Authors: Fapohunda, Christopher
Abstract: Concrete made from ordinary Portland cement continues to be used as the main construction materials because of
its durability and strength characteristics in service life. But the contrary becomes the case when such concrete is
exposed to aggressive environment created by the prevalence of chloride ions that are common in marine/coastal
environment characterized by temperature extremes, that is peculiar to Nigeria. Hot marine and coastal
environment, constitute an aggressive environment that has been found to be deleterious to the strength and
durability characteristics of concrete, thus causing premature deterioration of concrete structures. Research works
to reverse this trend go on continuously. This paper presents one of such works which investigates the effect of
partial replacement of cement with slag on chloride permeability of concrete cured at elevated temperatures. It was
found out that partial replacement of cement with slag increases the resistance of concrete to chloride penetration2010-01-01T00:00:00ZA COMPARISON OF BOND PERFORMANCE OF CONCRETE REINFORCED WITH REINFORCEMENTS FROM DIFFERENT MANUFACTURERSOyelade, AkintoyeFapohunda, ChristopherAdewusi, Ohttp://repository.fuoye.edu.ng:80/handle/123456789/10882015-09-28T13:45:35Z2014-01-01T00:00:00ZTitle: A COMPARISON OF BOND PERFORMANCE OF CONCRETE REINFORCED WITH REINFORCEMENTS FROM DIFFERENT MANUFACTURERS
Authors: Oyelade, Akintoye; Fapohunda, Christopher; Adewusi, O
Abstract: The transfer of stress from a deformed bar to the concrete is achieved by mechanical locking of the steel into the surrounding concrete. This interfacial bond strength between steel and the surrounding concrete is an important factor influencing the strength and durability of reinforced concrete structure. This paper presents the result of investigation conducted to find out the bond performance of reinforcement from different manufacturer. 12 mm and 16 mm diameter steel specimens from five different manufacturers were used for this investigation. Tensile properties and pull out test were conducted. The results showed that: (i) all the steel specimens substantially met the minimum requirement specified by relevant standards for both 12 mm and 16 mm diameters, (ii) Bond performance of locally-made was found to be better than the imported ones for 12 mm diameter, but for 16 mm diameter, imported steel showed a better bond performance than the locally made ones, (iii) All the steel specimens exhibited splitting failure, (iv) the lowest values of slippage were exhibited by a locally-sourced steel specimens, and (v) bond stresses obtained from this investigation for both 12 mm and 16 mm diameter bars are structurally adequate.2014-01-01T00:00:00ZA Review and Investigations of Some Properties of Foamed Aerated ConcreteIkponmwosa, EfeFalade, FunsoFapohunda, Christopherhttp://repository.fuoye.edu.ng:80/handle/123456789/10872015-09-28T13:37:28Z2014-01-01T00:00:00ZTitle: A Review and Investigations of Some Properties of Foamed Aerated Concrete
Authors: Ikponmwosa, Efe; Falade, Funso; Fapohunda, Christopher
Abstract: The paper presents the results of investigation conducted on foamed aerated concrete – a lightweight concrete - with a view to determining its potential as a construction material in Nigeria. The properties investigated on foamed aerated concrete having a designed density of 1600kg/m3 were: workability, density, compressive strength, tensile strength, and the water absorption capacity. The results showed that at the designed density adopted for this work, the material was workable and repeatable. Other results at 28 days of curing are: (i) compressive strength of 15. 43N/mm2, 13.89N/mm2 respectively for air-cured and water-cured specimens, (ii) modulus of rupture of 2.53N/mm2 (ii) splitting tensile strength of 1.63N/mm2, and (iv) the water absorption capacity of 1.03%. The tensile strength to compressive strength ratio was more than 10%. These properties improved with time. It can be concluded that the foamed aerated concrete used for this work is repeatable, and of adequate strength for use as a construction material.2014-01-01T00:00:00Z