This document describes the packing density method for designing high-performance concrete mixes. It discusses how packing density can optimize performance by maximizing the packing of aggregate and cementitious materials. The method involves 6 steps: 1) determining optimal aggregate fractions, 2) calculating packing densities, 3) determining voids contents, 4) establishing minimum paste content, 5) calculating aggregate contents, and 6) determining cement and water contents. The document provides an example of using this method to design an M20 grade concrete mix.
Packing density is new kind of mix design method used to design different types of concrete. To
optimize the particle packing density of concrete, the particles should be selected to fill up the voids between
large particles with smaller particles and so on, in order to obtain a dense and stiff particle structure.
MEANING OF MIX DESIGN
GRADE OF CONCRETE.
FACTORS INFLUCING THE CHOICE OF MIX DESIGN.
MATHODS OF CONCRETE MIX DESIGN
MIX DESIGN BY INDIAN STANDARD METHOD.
Packing density is new kind of mix design method used to design different types of concrete. To
optimize the particle packing density of concrete, the particles should be selected to fill up the voids between
large particles with smaller particles and so on, in order to obtain a dense and stiff particle structure.
MEANING OF MIX DESIGN
GRADE OF CONCRETE.
FACTORS INFLUCING THE CHOICE OF MIX DESIGN.
MATHODS OF CONCRETE MIX DESIGN
MIX DESIGN BY INDIAN STANDARD METHOD.
The process of selecting suitable ingredients of concrete and determining their relative amounts with the objective of producing a concrete of the required, strength, durability, and workability as economically as possible, is termed the concrete mix design.
Self compacting concrete (SCC) complete detailed mix design. you can refer it for your knowledge or academic purpose. for more information regarding civil engineering, follow us on
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Shotcrete normally has a greater compressive strength then cast in place concrete due to lower water to cement ratio.
The guniting is the most effective process of repairing concrete work which has been damaged due to inferior work or other reasons. It is also used for providing an impervious layer.
Manufacturing process of concrete (for civil engineering) laxman singh
i have made all the slide for civil engineering and poly diploma civil.
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software - power point presentation 2015
Mix Design of High Strength Concrete by Partially Replacement of Cement by Fl...dbpublications
Concrete is the commonly used material which is mostly used in civil engineering structures. The present investigation deals with high strength concrete of M60 by partial replacement of OPC with fly ash in percentages of 0%, 5%, 10% and 15% in various ratios and also add Masterpel 777 super plasticizer for workability purpose. After completion of experiment we have to do the compressive, Flexure and split tensile strength tests during the periods of 7,14 and 28 days. In this design project we have designed M60 grade concrete using Department of Environment (DOE) mix design method.
The process of selecting suitable ingredients of concrete and determining their relative amounts with the objective of producing a concrete of the required, strength, durability, and workability as economically as possible, is termed the concrete mix design.
Self compacting concrete (SCC) complete detailed mix design. you can refer it for your knowledge or academic purpose. for more information regarding civil engineering, follow us on
YouTube channel : https://youtube.com/channel/UCSfiThc6MlOZ9jbDecoQIaw
LinkedIn : https://www.linkedin.com/in/shivaprasad-rajoor-9b04411a9
blog : https://civilcareer4you.blogspot.com/
like, share and subscribe
Shotcrete normally has a greater compressive strength then cast in place concrete due to lower water to cement ratio.
The guniting is the most effective process of repairing concrete work which has been damaged due to inferior work or other reasons. It is also used for providing an impervious layer.
Manufacturing process of concrete (for civil engineering) laxman singh
i have made all the slide for civil engineering and poly diploma civil.
these are 100% correct but in case of some error comment down or contact me on (laxmans227@gmail.com)
follow me for all updates
if u have any doubt fell free to ask on comment section
i upload new slides every sunday,
so keep calm and follow me(now).
software - power point presentation 2015
Mix Design of High Strength Concrete by Partially Replacement of Cement by Fl...dbpublications
Concrete is the commonly used material which is mostly used in civil engineering structures. The present investigation deals with high strength concrete of M60 by partial replacement of OPC with fly ash in percentages of 0%, 5%, 10% and 15% in various ratios and also add Masterpel 777 super plasticizer for workability purpose. After completion of experiment we have to do the compressive, Flexure and split tensile strength tests during the periods of 7,14 and 28 days. In this design project we have designed M60 grade concrete using Department of Environment (DOE) mix design method.
This presentation contains IS Concrete mix design method and Basics of Design mix of concrete.It conveys; Objectives of Mix Design ;Grades of Concrete; Nominal Mix and Design Mix; Factors affecting Choice of Mix Design; Methods of Concrete Mix Design; IS Method Of Design.
Design of High Compressive Strength Concrete Mix without AdditivesIJERA Editor
In this paper, the crashed Basalt and uncrushed granite is used in concrete mixes as coarse aggregate. The selected materials, with high specification using special production techniques, the properties ,the mix design procedure and mix proportion of the high strength concrete (HSC) were discussed. Different proportions of Ordinary Portland cement (410,430 and 450) kg/m3 with different crashed Basalt and uncrushed Granite coarse aggregate amount (1120 and 1050) kg/m3 and fine aggregate with fine modulus of 3.65 were used. Eight concrete mixes were prepared: two as control mix for crashed Basalt and uncrushed Granite, three with crashed Basalt and three with uncrushed Granite coarse aggregate with mix amount(410:680:1120,430:610:1050 and 450:550:1050) kg/m3,(cement: fine aggregate: coarse aggregate)respectively. The study showed that the use of granite coarse aggregate in concrete mixes has a clear effect in mix proportion. The compressive strength of concrete was measured at ages of 7, 28 and 56 days and it was found that the granite (Mix3) of (450:550:1050) kg/m3 with w/c of 0.46 give the highest of strength in 28 and 56 days among the abovementioned mixes its 56 and 64 N/mm2 respectively. The paper shows that good results of compressive strength and workability of concrete were obtained when using granite coarse aggregate.
Experimental Investigation of High – Strength Characteristics of Self Curing ...IJMTST Journal
In concrete structures exposed to the ambient air at early ages, the moisture content in concrete
decreases due to moisture diffusion. In addition, self-desiccation due to hydration of cement causes an
additional decrease of moisture content in concrete at early ages, especially for high-strength concrete. In this
study, the internal relative humidity in drying concrete specimens was measured at early ages. Furthermore,
the variation of relative humidity due to self-desiccation in sealed specimen was measured. The moisture
distribution in low-strength concrete with high water/cement ratio was mostly influenced by moisture
diffusion due to drying rather than self-desiccation. In high-strength concrete with low water/cement ratio,
however, self-desiccation had a considerable influence on moisture distribution. The results obtained from
the moisture diffusion theory were in good agreement with experimental results.
The Research on Process and Application of Self-Compacting ConcreteIJERA Editor
Self-compacting concrete (SCC) is one kind of concrete with high workability and durability. First of all, this paper introduces the definition and history of Self-compacting concrete (SCC). Secondly, it introduces the raw material selection, equipped technology and the mix proportion design method of Self-compacting concrete. Finally, it analyzes the problems and countermeasures of self-compacting concrete and look ahead the application prospect of it.
Study of Boundary Value Analysis in Structural Engineering and Fluid Mechanic...ijtsrd
This paper presents a focused study on properties of porous concrete to widen its application to structural engineering. Mechanical properties like compressive strength, indirect tensile strength, flexural strength and physical properties like density, permeability and porosity are studied. To determine those parameters, twenty seven cubes, cylinders and prisms were tested. Also, three polymer impregnated porous concrete slabs were tested under pure bending moment to study the efficiency of selected resin to integrate particle of concrete to achieve a new generation in using porous concrete in structural engineering. Three different cement content specimens of porous concrete were considered, studied cement contents are 200 kg m3, 300 kg m3 and 400 kg m3. The results show that, increasing the cement content can increase the compressive strength, indirect tensile strength and flexural strength. Density of porous concrete is less than conventional concrete by 21 but permeability factor recorded higher value compared to conventional concrete by sixteen times. Increasing the cement content has no significant effect on either ultimate load or maximum deflection of polymer impregnated porous concrete slabs but the results recorded an achievement to use this concrete in structural engineering applications and give an easy way to cast special concrete like polymer concrete without special tools. Rambha Kumari "Study of Boundary Value Analysis in Structural Engineering and Fluid Mechanics using Homotopy Perturbation" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30516.pdf Paper Url :https://www.ijtsrd.com/engineering/civil-engineering/30516/study-of-boundary-value-analysis-in-structural-engineering-and-fluid-mechanics-using-homotopy-perturbation/rambha-kumari
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1. Indian Institute of Technology Delhi
Department of Civil Engineering
Advanced Concrete Technology
1
Prepared By:
Imam Mahdi Burhani
Hafizullah Sadat
Professor B.Bhattacharjee
2017
3. Packing density is new kind of mix design method
used to design different types of concrete; Normal
concrete, high strength concrete, no-fines
concrete and self compacting concrete.
The concept of packing density as a fundamental
principle for designing HPC mixes.
High performance concrete (HPC) has become
more and more popular in recent years.
3
4. However, the various required performance
attributes of HPC, including strength,
workability, dimensional stability and
durability…often impose contradictory
requirements on the mix parameters to be
adopted, thereby rendering the concrete mix
design a very difficult task.
4
5. The conventional mix design methods are no longer
capable of meeting the stringent multiple
requirements of HPC.
The packing density method concept is based on the
belief that the performance of a concrete mix can
be optimized by maximizing the packing densities of
the aggregate particles and the cementitious
materials.
5
6. Multi-sized aggregate can be packed together
much more effectively to achieve a much higher
packing density than single size.
With the paste volume fixed, increase in packing
density of the aggregate increase the workability
of the concrete at the same water/cementitious
ratio.
Increase the strength of the concrete by reducing
the water/cementitious ratio while maintaining
the same workability.
6
7. Increase in packing density of the aggregate could
also be employed to improve the dimensional
stability of the concrete.
The concept of packing density can be extended to
apply also to the cementitious materials.
7
8. The packing density of the cementitious materials
has great impact on the strength of the concrete
produced.
Lower water/cementitious ratio
Better packing would reduce the permeability
Reduce the porosity of the transition zone
Major factors affecting the packing density of an
aggregate; size range, grading, particle shape,
surface roughness, and effectiveness of the mixing
and compaction processes. 8
10. Procedure:
First step: Determination of aggregate fractions
1. Considering different coarse aggregates size.
2. Determine the bulk density of coarse aggregates
separately.
3. Mix coarse aggregates in different proportions.
4. Determine the bulk density of mix different size
aggregates.
5. Draw the graph of bulk density against fraction of
different size proportion aggregates.10
11. 6. Based on the graph optimal aggregate fractions is
selected( fraction corresponding to maximum bulk
density)
Two size fractions of coarse aggregates are selected
for the mix design, 20mm and 12.5mm down size, the
coarse aggregate 20mm and 12.5mm were mixed in
different proportions by mass, such as 90:10, 80:20,
70:30 and 60:40 etc.
11
12. Then Fine aggregate is added in the total coarse
aggregates (20mm and 12.5mm) in different
proportions, the bulk density and weight fraction of
each mixture is determined.
12
13. For coarse aggregates:
From standard test:
13
14. From the above graph the maximum bulk density is
corresponding to fraction of x=0.3. Therefore, the
coarse aggregates proportion is (70:30).
14
15. For coarse aggregates + Fine aggregate: (60:40)
From standard test:
15
16. From the above graph the maximum bulk density is
corresponding to fraction of x=0.4 Therefore, the mix
proportion is: Coarse aggregates: Fine aggregate=(60:40)
So aggregates proportion is: (42:18:40)
16
17. Second Step: Determination of Packing Density
Total packing density of the mixture is sum of packing density
of different size coarse aggregates and fine aggregate.
17
19. Third step: Determination of Voids Contents
The voids content in percentage volume of
aggregate or mixture of three aggregate is
determined from its bulk density from the
following relations.
The value of specific gravity should be taken as
average.
19
21. Fourth step: Determination of paste content
Minimum paste content is sum of the void
content in combined aggregate and excess paste
over and above it to coat the aggregate
particle.
Concrete mix containing minimum paste content
should be cohesive, free from segregation and
bleeding.
21
22. Minimum paste contents is determined from
Flow table test (carry out for workability)
Excess 10% voids content
22
25. Sixth step: Cement and water content
For M20 grade concrete keeping in mind the
target mean strength suitable water-cement ratio
is fixed as per trial mixes.
W/C ratio = 0.56
25
27. Following the above procedure all the ingredients of concrete were
obtained for 5%, 10% and 15% in excess of paste content and water
cement ratio 0.56 and 0.58, the values are presented in Table .
27