A PROPOSED STUDY TO
EXAMINE THE EFFECT OF
COIR FIBER ON CONCRETE
HOLLOW BLOCKS
INTRODUCTION
RATIONALE
• Concrete hollow blocks is the most widely used
construction material in all over the world. Concrete hollow
blocks is weak in tension
• With this, the researchers thought of an idea of coco coir
fiber as an addition to the fine aggregates as technological
advancement in making concrete hollow blocks
• Produce durable and economical concrete hollow blocks
• The overall findings of this study are relevant and valuable
to CHB suppliers, contractors and
CONCEPTUAL FRAMEWORK
INPUT
Project Startup Meeting,
Data
Collection
and Review
PROCESS
OUTPUT
CHB
Fabrication
Provide
Recommenda
tion
Curing of CHB
OF THE
PROBLEM
InSTATEMENT
general, the purpose
of this
study is to evaluate the efficacy of
coir fiber as an adding product to the concrete hollow blocks
It is designed to provide answers to the following questions in
particular:
1. . What are the changes of the mechanical aspect of the concrete
hollow blocks with coir fiber compare to the controlled concrete hollow
blocks
2. What are the advantages of utilizing concrete hollow blocks with coir
fiber compared to controlled concrete hollow blocks in terms of its cost,
efficiency, and sustainability?
SIGNIFCANCE OF THE STUDY
After the conduct of this study, it is anticipated that the following
sectors will benefit from using coir fiber for concrete hollow blocks
production and utilization:
• Building Owners
• Contractors
• Suppliers
• Environment
• Future Researchers
SCOPE
AND
LIMITATION
The goal of the research is to develop a concrete masonry unit by
adding coir fiber in a traditional concrete hollow block that is
predominantly formed of cement and sand only. All specifications from
the production, sampling to testing will be based on the standards
provided by the American Society of Testing and Materials (ASTM)
requirements as well as from other certified references that are relevant
to the study.
This study on coconut fiber reinforced concrete is limited to rural
residential constructions. The mix design is for M20 concrete and is
usually used in buildings of heights up to 10 m. Mix design for concrete
is done for mild exposure conditions and corrosions study is not done.
THEORETICAL
BACKGROUND
RELATED LITERATURE
Cook et al. (1978) reported the use of randomly distributed Coir
fiber reinforced cement composites as low cost materials for roofing.
The studied parameters were fiber lengths (2.5 cm, 3.75 cm and 6.35
cm), fiber volumes (2.5, 5, 7.5, 10 and 15%) and casting pressure (from 1
to 2 MPa with an increment of 0.33 MPa). Different properties like
bending, impact, shrinkage, water absorption, permeability and fire
resistance were investigated. They concluded that the 7.5 % and cast at
pressure of 1.67 MPa. Cost comparison revealed that this composite was
substantially cheaper than the locally available roofing mat.
“Recycling
of Waste Coconut
Shells as Substitute for Aggregates in Mix
RELATED
STUDIES
Proportioning of Concrete Hollow Blocks”, this study focus on generating
product using agricultural waste as well develop an alternative
construction material that will lessen the social and environmental issues.
It also
paved the way
to the recognition
of using Block
coconut
shells and
fiber
” Application
of Coconut
Fiber in Cement
Industry”,
seismic
as
a substitute
for aggregates
in developing
concrete
hollow
blocks.
effects
have become
major governing
factor in
analysis,
design
and
(Tomas
U. Ganiron,
2017) This is mainly due to the occurrence of severe
construction
of structures.
earthquakes. As to the current construction practices, most of the
earthquake resistive structures are designed with cement hollow block
providing require reinforcements. However, this construction method is
very expensive and not affordable for middle class families. Therefore, an
experiment was carried out by author to find out the suitability of coconut
fiber application in cement hollow block work. The experimental study was
focused to apply coir fiber to enhance the shear strength of cement hollow
block as a cost effective and sustainable practical solution. (G.A.P
Gampathi, 2011)
RESEARCH
METHODOLOGY
RESEARCH DESIGN
RESEARCH ENVIRONMENT
The study was decidedly to be conducted at Sacsac, Dalaguete Cebu
near to the DPWH-Cebu 7th office where materials and equipment to
be used during the experiment are readily available.
RESEARCH INSTRUMENT
On execution of the test, CHB sample is prepared and casted
beforehand and is cured appropriately within the given period of time
(7, 14, and 28 days). Slump test is conducted before molding a CHB. In
performing this test, slump cone and steel rod is used. Laboratory test
are necessary in determining the require data such as the compressive
strength of the CHB sample by using the Ultimate Testing Machine
(UTM).
RESEARCH PROCEDURE
The research procedure is consists of four (4) phase:
Phase 1: Procurement of materials
Phase 2: Prepare of materials, mixing and casting of concrete hollow
block sample
Phase 3: Curing of concrete hollow blocks
Phase 4: Testing of concrete sample
A PROPOSED
STUDY TO
CONSIDER
PROCUREMENT
OF MATERIALS
PREPARE OF
MATERIALS
CURING OF
CHB
MANUAL
CASTING OF
CHB AND
CYLINDRICAL
SAMPLE
MIXING OF
CONCRETE
MIXTURE
TESTING OF
THE CHB
AND
CYLINDRICAL
SAMPLE
PRESENTATION,
ANALYSIS AND
INTERPRETATION OF
DATA
PRESENTATION OF DATA
Curing plays an important role in strength development and durability
of concrete. Curing takes place immediately after concrete placing and
finishing and involves maintenance of desired moisture and temperature
conditions, both at depth and near the surface for extended period of
time (7 days, 14 days and 28 days).
PERCENTAGE ( % )
INDIVIDUAL
AVERAGE
COMPRESSIVE
COMPRESSIVE
STRENGTH
STRENGTH
3
2,57
2,5
2,26
0%
1.92
1.91
1.90
6%
2.01
1.90
2,14
1,91
1,5
2.26
1
2.50
8%
2
2.57
0,5
3.24
10 %
2.43
2.14
0
0%
6%
1.86
Figure 4.1 Compressive Strength of 7 Curing Days
8%
7 DAYS
10%
PERCENTAGE ( % )
INDIVIDUAL
AVERAGE
2,3
COMPRESSIVE
COMPRESSIVE
2,25
STRENGTH
STRENGTH
2,26
2,2
2,15
0%
2.29
1.95
2,05
1.61
6%
1.86
2,11
2,1
1.99
2
1,99
1,95
2.11
8%
1.97
1,9
2.26
2.54
10 %
1.67
1,95
1,85
1,8
2.11
1,75
0%
6%
2.55
Figure 4.2 Compressive Strength of 14 Curing Days
8%
14 DAYS
10%
PERCENTAGE ( % )
INDIVIDUAL
AVERAGE
COMPRESSIVE
COMPRESSIVE
STRENGTH
STRENGTH
2,7
2,61
2,6
2,52
2,5
0%
2.14
2.22
2,4
2.29
6%
2.41
2.53
2.64
8%
2.40
2.56
2,3
2,22
2,2
2.61
2,1
2.83
10 %
2,5
2.50
2
0%
6%
2.43
Figure 4.3 Compressive Strength of 28 Curing Days
8%
28 DAYS
10%
PERCENTAGE ( % )
INDIVIDUAL SPLIT
AVERAGE SPLIT TENSILE
TENSILE STRENGTH
STRENGTH
3
2,56
2,5
0%
1.95
1.93
1.92
6%
1.96
2.60
2,05
1,96
1,93
1,5
1.96
1
1.96
8%
2
2.56
0,5
2.53
10 %
2.04
2.05
0
0%
6%
2.07
Figure 4.4 Slit Tensile Strength of 7 Curing Days
8%
7 DAYS
10%
PERCENTAGE ( % )
INDIVIDUAL SPLIT
AVERAGE SPLIT TENSILE
TENSILE STRENGTH
STRENGTH
3
2,59
2,5
0%
2.12
1.98
1.85
6%
2.16
2.57
2,12
2,1
1,98
1,5
2.10
1
2.04
8%
2
2.59
0,5
2.60
10 %
2.15
2.12
0
0%
6%
2.09
Figure 4.5 Split Tensile Strength of 14 Curing Days
8%
Column1
10%
PERCENTAGE ( % )
INDIVIDUAL SPLIT
AVERAGE SPLIT TENSILE
TENSILE STRENGTH
STRENGTH
3
2,7
2,5
0%
2.16
2.11
2.07
6%
2.22
2.69
2,17
2,11
2
1,5
2.17
1
2.18
8%
2,46
2.70
0,5
2.71
10 %
2.44
2.46
0
0%
6%
2.48
Figure 4.6 Split Tensile Strength of 28 Curing Days
8%
28 DAYS
10%