TABLE
OF CONTENTS
Contents Page
Title page
Certification i
Dedication ii
Acknowledgment iii
Table of contents iv
List of Tables viii
List of Plates ix
List of figure x
Abstract xi
CHAPTER
ONE
1.0 Introduction 1
1.1 Statement of the problem 3
1.2 Aim
and objectives 4
1.3 Justification
of the study 5
1.4 Scope
and limitation of the work 5
1.5 Methodology 6
CHAPTER
TWO
2.0 Review
of literature 7
2.1 Ingredient
of concrete 9
2.1.1 Water 9
2.1.2 Aggregates
10
2.1.3 Cement 11
2.1.4 Admixtures 12
2.2 Bamboo
leaf ash 14
2.3 Properties
of concrete 15
2.3.1 Fresh
concrete 15
2.3.2 Hardened
concrete 16
2.4 Factors
affecting strength of concrete 18
CHAPTER
THREE
3.0 Materials
and methods 21
3.1 Material
selection 21
3.1.1 Coir
Ash 21
3.1.2 Coarse
aggregate 23
3.1.3 Fine
aggregate 23
3.1.4 Cement 23
3.2 Test
of the constituent materials 23
3.2.1 Proportioning 24
3.2.2 Batching 24
3.2.3 Composition
of the constituent materials
for the production of
concrete 25
3.2.3 Mixing 27
3.2.4 Casting 28
3.2.5 Compaction 29
3.2.6 Curing 29
3.2.7 Crushing 30
3.3 Experimental
Investigation 31
3.3.1 Laboratory
Test 31
3.3.1.1
Sieves Analysis 31
3.3.1.2
Slump Test 33
3.3.1.4
Compressive strength of concrete 34
CHAPTER
FOUR
4.0 Results
and Discussion 36
4.1 Result
of the Sieve analysis
(Particle Size
Distribution) 36
4.2 Workability
(Slump) Test 40
4.3 Density
Test 40
4.4 Compressive
Strength of the Hardened
Concrete Cubes 44
4.5 Discussion
of Result 45
CHAPTER
FIVE
5.0 Conclusion
and Recommendation 50
5.1 Conclusion 50
5.2 Recommendation 51
Reference 52
LIST
OF PLATES
Plate: 3.1 Bamboo Leaf in it Natural Habitat 21
Plate:3.2 Burning of Bamboo Leaf (BLAsh) 22
Plate 3.3 Sieve Analysis Test on BLAsh 22
Plate 3.4 Mixing
of Bamboo Leaf Ash with
Varying
% of Cement, Fine Aggregate
and
Coarse Aggregate 27
Plate: 3.5 Casting of Concrete Cubes with
BLAsh Replacements 28
Plate 3.6 Curing of Concrete Cubes 29
Plate 3.7 Compressive Strength Test on the Concrete Cubes 30
Plate 3.8 Slump of Test of BLAsh Concrete 33
LIST
OF TABLE
TABLE 3.1 COMPOSITION
OF CONSTITUTENT
material
for BLAsh concrete
at
0%,5%,10%,15% and 20% case 27
Table 4.1 The particle size distribution of sharp sand 36
Table 4.2 The Particle Size Distribution of Granite 39
Table 4.3 The Slump Value of The Fresh Concrete 40
Table 4.4 the Density of the Hardened Concrete
after 7 Days of Curing 41
Table 4.5 the Density of the Hardened Concrete
after 14 Days of Curing 41
Table 4.6 The Density of the Hardened Concrete
after 21 Days of Curing 22
Table 4.7 The Density of the Hardened Concrete
after 28 Days of Curing 43
Table 4.8 The Average Density of the Hardened Concrete 43
Table 4.9 Compressive Strength of the Hardened
Concrete after 7 Days 44
Table 4.10 Compressive Strength of the Hardened
Concrete
after 14 Days 45
Table 4.11 Compressive Strength of the Hardened
Concrete
after 21 Days 46
Table 4.12 Compressive Strength of the Hardened
Concrete
after 28 Days 47
Table 4.13 Average
Compressive Strength of
BLAsh
Concrete at different Ages 28
LIST
OF FIGURE
Figure 4.1 Particle Size Distribution Curve of Sharp Sand 37
Figure 4.2 Particle Size Distribution Curve of Granite 39
Figure 4.3 Effects
of BLAsh Replacement on
Concrete
with respect to Days Curing 48
ABSTRACT
Concrete is a major
construction material, which is usually made by mixing cement, water, fine and
coarse aggregate and sometimes admixtures in their right proportions. The use
of waste materials with pozzolanic properties in concrete production is a
becoming a worldwide practice. The assessment of the pozzolanic activity of
cement replacement materials is becoming increasingly important because of the
need for more sustainable cementing products. In this bamboo leaf Ash is used
as partial replacement for cement in ranges of 5%, 10% 15%. Strength and
durability tests were carried out to assess the feasibility of using bamboo
leaf ash as partial replacement of cement in concrete.
This showed that BLAsh
has no significant effect on the density of the concrete comparatively. The
strength values at different ages for BLAsh replacements compare to be a bit
favorable with the control of 0% BLAsh replacement. The optimum compressive
strength of 20.00N/mm2 was obtained at 5% replacement at 28 days of
age compared to the control of 20.00N/mm2. It is therefore advisable
to use 5% replacement of BLAsh with cement paste when it is to be used as
supplement to cement.
CHAPTER
ONE
1.0
INTRODUCTION
Concrete is a composite
element consisting of aggregates enclosed in a matrix of cement paste including
possible pozzolanic, has two major components-cement paste and aggregates. As a
construction material, concrete can be in almost any shape desired, and once
hardened, can become a structural (load bearing) element. The strength of
concrete depends upon the strength of these components, their deformation
properties, and the adhesion between the paste and aggregate surface. With most
natural aggregates, it is possible to make concrete up to 120KN/mm2
a compressive strength by improving the strength of the cement paste, which can
be controlled through the choice of water-cement ratio, and type and dosage of
admixtures (Dwivedi 2006).
The high cost of
conventional construction material is a dominating factor affecting housing
system around the world. This has necessitated research work into alternative
materials in the construction field. Since the cost of cement is many times
more than the cost of other ingredients in concrete making. Recently, attention
is mainly directed to use of as little cement as possible constituent with
adequate strength and durability. Little research has been carried out to study
the bamboo leaf waste as a pozzolanic material. Dwivedi (2006) reported the
reaction between calcium hydroxide (CH) and bamboo leaf ash for four hours of
reaction using the differential scanning calorimetric (Dsc) technique. Singh et
al (2000) discussed that eco friendly composite cements may be obtained by
partial replacement of Portland cement (PPC) with low cost materials. They
studied the hydration of bamboo leaf ash in a blended Portland cement. It was
concluded that bamboo leaf ash is an effective pozzolanic materials. When 20 weight
(wt) % of bamboo ash was mixed with PPC the compressive strength values of
mortars at 28 day of hydration were found to be quiet comparable to those of
PPC. Villar-cocina et al (2010) conducted a study on sugarcane leaf ash (SCLA).
Hydration of 10 wt % SCLA composite Portland cement was studied by using powder
x-ray diffraction, FTIR spectroscopy, and differential scanning calorimetric
and other techniques. The result have show that the pozzolanic reaction of
sugarcane leaf ash increases with time. They have been used to produce concrete
having almost the same behavior as normal concrete.
In general, a
pozzolanic material has little or no cementing properties. However, when it has
a fine particle size, in the presence of moisture it can react with calcium
hydroxide at ordinary temperatures to provide the cementing property. Bamboo
leaf ash (BLAsh) is one of the agro waste ashes whose chemical composition
contains a large amount of silica and has high potential to be used as a cement
replacement (Okere 2013). Most of the concrete produced today are a multi
component product containing one or more admixtures in addition to the four
basic components which is cement, fine aggregate, coarse aggregate and water.
For every component, one usually as several choices that could influence the
cost of the end product and its behavior in service. Among the constituent
components, however, cement or cementitious materials as a whole, play a vital
role in producing strong and durable concrete. Utilization of these waste
materials is a partial solution to environmental and ecological problems. Use
of these also helps in reducing the cost of concrete production by reducing the
quantity of cement used. Consequently, this study presents the suitability of
using bamboo leaf ash (BLAsh) as a supplementary cementitious material. This
work then investigates the effect of bamboo leaf Ash on the workability of
fresh concrete and the compressive strength of added concrete.
1.1 STATEMENT OF THE PROBLEM.
Concrete plays an
important role in the beneficial use of the material in construction industry.
Many modifications and developments have been made to place material like
Bamboo Leaf Ash (BLAsh), wood wool, rice husk and marble powder as a cement
replacement constituent, but it as an alternative to reveal that the
replacement of Bamboo Leaf Ash (BLAsh), in Portland cement affect the compressive
strength of concrete. One of the main goal of sustainable waste management is
to maximize recycling and reuse. With increasing environmental pressure to
reduce waste and pollution and to recycle as much as possible, the concrete
industry has begun adopting a number of methods to achieve these goals.
One of the suggestions
in the forefront has been the sourcing, development and use of alternative,
non-conventional local construction materials including the possibility of
using some agricultural wastes and residues as partial or full replacement of
conventional constructional materials. In countries where abundant agricultural
wastes are discharged, these wastes can be used as potential material or
replacement material in construction industries.
This has a significant impact by
reducing the amount of quarrying and landfill space required, and acts as a cement replacement, reduces the
amount of cement of required to produce a solid concrete. As cement production
creates massive quantities of carbon dioxide, cement replacement technology
such as this will play an important role in future attempts to cut carbon
dioxide emissions and production of economical optimum strength concrete, so as
to encourage the use of this ‘impressive’ waste product as construction
material in low-cost housing.
1.2
AIM
AND OBJECTIVES
The
aim of this project is to study the compressive strength of concrete with
cement partially replaced with bamboo leaf ash and the suitability of the
material to be used as cement substitute
The objectives of the projects are:
§ To
determine the percentage of BLAsh as a replacement for cement of
5%,10%,15%,20%.
§ To
replace cement with known percentage of bamboo leaf ash and cast with it.
§ To
examine the workability of the fresh BLAsh concrete by slump test.
§ To
compare the strength of cubes cast at 100% of cement with cubes replaced with
the known percentage of bamboo leaf.
§ To
suggest the use of bamboo leaf ash as alternative supplement to cement so as to
reduce cost of construction.
1.3 JUSTIFICATION OF THE STUDY.
In
Nigeria today, an appreciable percentage of the entire population cannot afford
to build their own houses especially modern types due to high cost of cement
and the average percentage of the country’s population find it difficult or
almost impossible to afford the cost. In order to curb this act, this project
is targeting whether bamboo leaf ash can be used as a partial replacement for
cement in order to achieve optimum strength and economic concrete and the
corresponding quantity of coir ash required.
1.4 SCOPE
AND LIMITATION OF WORK
This
study concentrated on investigation of compressive strength of bamboo leaf (BLAsh)
concrete and pure cement (100% of cement) as a control sample. The Laboratory
Tests include sieve Analysis, specific gravity natural moisture content and
water absorption of each aggregate sample. Each samples of concrete were design
for grade 20 (as mix ratio 1:2:4) and water cement ratio (w/c) of 0.55. The control sample composed of 100% cement,
fine Aggregate, coarse aggregate and water. Then, other four samples were of
the same mix design with bamboo leaf ash as cement replacement that serves as
an
Unconventional
mixes which comprises of 5%, 10%,15% and 20% of the total weigh of ordinary
Portland cement. These specimens (samples) were the comprehensive strength test
with the use of Universal Testing Machine in accordance with BS1881:Part1:1983.
1.5 METHODOLOGY.
In
carrying out of the research work, the method adopted is in this sequence.
-
Procurement of materials.
-
Preparation of the bamboo leaf Ash.
-
Testing of the materials.
-
Casting of the cubes.
-
Curing of the cubes.
-
Testing for the compressive strength of
the specimen.
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