Introduction to IEEE STANDARDS and its different types.pptx
Feasibility Study for different mix designs in Libya
1. Feasibility Study of different mix
designs in Libya
Supervised By : Prof. Hakim S. Abdelgader Presented by : Eng. Abdul Azeem Baig
2. Introduction
.
• The purpose of this presentation is to
present a comparison of different mix designs.
• The targeted audiance who can benefit
from this study are those who are new in
libya or have no knowledge regarding this
topic
• The values of the physical and
geotechnical parameters of component
materials form the basis of the concrete
mix design considerations.
3. Problem StatementA regular problem with adverse affects
3
• People living in Libya are familiar with a
well known problem regarding the poor
quality control of concreting in public
sector
• Where poor or no mix design is
performed
• Even when an engineer makes a good
will and tries to design the mix , there are
some technical problems associated with
it.
4. CausesA regular problem with adverse affects
4
Generally the causes for the above told
problems vary hugely from sector to sector.
Following are most common reasons :
• Illiterate labors and workers , with no
technical knowledge or training
• Lack of culture of testing at different
stages.
• Geotechnical inconstancy between local
and foreign mix design method
6. Selecting an optimal
mix design method
confirming
workability and
flexibility in usage
Feasibility Study
selecting an enviromental friendly mix design with
minimum cost providing maximum accessibility
and usability.
6
7. Methodology
.
1.The research will analyze following
mix designs
i.ACI method
ii.British method
iii.Three eq method
iv.Double coating method
8. Methodology
A unique approach
1. The feasibility study is done
considering following points:
Feasibility
Analysis
Location analysis
Cost analysis
Preparation, placing &
curing analysis
9. 1. ACI Method
.
The ACI method is one of the most used method all over the world,
and its design is basically based on tests done in laboratory &
observation on samples.
• The ACI method use in Libya is practically impossible due to
the minimum fine aggregate size specified by AASHTO
• physically feasible in Libya as the fine aggregate is very fine
in its naturally available form,
• although there are techniques to make the mix design
workable by adding specified sized aggregate to satisfy the
condition.
10. 2. The British method (DOE) :
.
This method is one of the oldest method available and is
based on Road Note No 4 method. It was made in 1988 .
• The British methods mainly presents a better approach
then ACI , in regard to aggregate specifications ,
• As it mainly classifies aggregate as crushed and
uncrushed to be used
• Therefore, this approach is better applicable to the kind
of aggregate abundantly found and used in Libya
11. 3. The three equation method :
.
This method makes a direct relation of compressive
strength of concrete with type of cement and aggregate
used, in addition to this , the water content is a function of
aggregate grading.
• The geotechnical significance of this method can be
defined on its basis of recognition of aggregate as round
or angular, which may be appraised due its adaptation to
simplicity & availability.
12. 4. The double coating method:
.
The approach used in this method is highly appreciable in terms of
accurate proportioning at site, with least trained labor capable of
generating quite highly accurate concrete mix required as designed
• The philosophy of this mix design method is based mainly on
calculating the weights of the main ingredients of concrete that
occupies a volume of one liter of water taking in consideration
the following two assumptions.
• The geotechnical significance of this method can be
defined as it recognizes the aggregate as round or angular , which
may be appraised due its simplicity of recognition (similar to
three eq method ).
14. Conclusion
.
• The ACI and BS methods are the most
commonly used. Both of these methods
depend on graphs and standard tables
• Also , It can be concluded that the bolomeya
method due to its simplicity
• double coating method due its high
practicability ,
• Are the most suitable mix designs to be used
locally while ensuring no limitations to
geotechnical implications for materials to be
used in the mix
15. Conclusion &
Recommendation
.
• It must be added that concrete
testing and placing is not a
characteristic criteria for mix
designs comparative study
• Further work is also
required in order to investigate the
integrity of the other existing mix
design methods and to recommend a
particular mix design for a particular
project category & location.
