International Journal of Technical Innovation in Modern Engineering & Science (IJTIMES)
International Journal of Technical Innovation in Modern Engineering & Science (IJTIMES)
International Journal of Technical Innovation in Modern Engineering & Science (IJTIMES)
Abstract:- The noteworthy use of any waste material depends upon it being economically
competitive with the alternate natural material. Replacement of waste materials will protect
diminishing of resources, and will circumvent the ecological and environmental damages
produced by digging and exploiting of the raw materials for the production of cement. It will
help to resolve the problem to some magnitude, otherwise experienced in dumping of wastes.
The purpose of this paper is to discover the use of Iron Dust in concrete as a mineral
admixture. In this laboratory study, Iron Dust was used as mineral admixture in concrete at
5%, 8%, 10%, 12% and 14% by weight of the cement content and a comparative study has
been done between normal concrete and Iron dust concrete so as to explore and assess the
possibility of using iron dust in concrete in terms of its strengthening properties.
1. INTRODUCTION
Researchers and technologists are constantly on the lookout for materials which can be used as a
replacement for conventional materials or which possess those properties which would qualify their use in
designs and new innovations. Concrete containing substitute materials as components fall under the first
group. The raw materials used for the production of cement and concrete are indispensably unlimited, since
virtually almost all of the earth’s crust can be exploited, if corresponding financial and energy requirements
can be satisfied with. This course of action cannot be taken as there are other constraints that demand
closer examination.
The successful exploitation of waste materials depends on its use being low-cost competitive with the
conventional natural material. [1] These costs are essentially made up of managing, organizing and
transportation. This form in which they are employed is broad and varied; they may be used as a as a
partial replacement of conventional Portland cement; they may be used as a binder, as an admixture, or
directly as aggregates in their natural or processed states. The stability and durability of concrete material
products using waste materials over the expected life span is of utmost importance, particularly in relation
to building and structural applications. Keeping all these considerations in mind and taking note of all
required standard specifications, wherever possible this research aims at determining the use of IRON
DUST in concrete as mineral admixture. The project will also examine ways to optimize the use of iron
dust in concrete so that it will give maximum benefits to concrete.
Yu-Cheng et al observed that the compressive strength of heavy concrete increases with iron ore content,
while the tensile strength declines. The concrete including 40% metallic aggregate content by volume
performed higher compressive strength and fracture toughness. [6]
Cai et al. (2011) reported on tests where they used the fines from aggregate manufacturing as aggregate
from mill tailings. They tested various concretes with mill tailing as fine aggregate, and additions of
microfines from the manufacturing process. They worked with w/c ratios in the range of 0.37 to 0.43, and
cement substitutions with fly ash and slag in the order of 35%. Their compressive strengths were in the 35
to 45 MPa range. They concluded that good concretes could be made with these material combinations. [7]
Yellishetty et al. (2008) reported the use of iron ore mineral waste of 12.5 and 20 mm size ranges as coarse
aggregates in concrete. Their results indicate that the 28-day uniaxial compressive strength of concrete
with iron-ore mineral waste as aggregates was 21.93 MPa while the equivalent compressive strength of
concrete with conventional granite aggregates was 19.91 MPa. [8]
Negm and Abouzeid (2008) reported that coarse solid phosphate mill tailings could be used as coarse
aggregates to prepare concrete with 240 kg/cm2 to be used in construction of small buildings. [8]
Madany et al. (1991) reported the use of sand blasting grit waste (copper slag) as replacement of sand in
the preparation of concrete blocks. The compressive strength of the concrete blocks with grit waste was 12
N/mm2 and higher than the Bahrain specification for precast concrete blocks. [8]
In this research work, Iron Dust has been used as mineral admixture in concrete at 5%, 8%, 10%, 12% and
14% by weight of the cement content and a comparative study has been done between normal concrete and
Iron dust concrete so as:
To explore and assess the possibility of using iron dust in concrete in terms of its strengthening
properties.
To compare the 7 days and 28 days compressive strengths of plain concrete and Iron dust concrete.
To compare 7 days and 28 days flexural strengths of normal concrete and Iron dust concrete.
Iron dust is an aggregate of iron particles of size approximately 20-200 µm. It is treated as a powder using
the particle size distribution, apparent density etc. as indexes. Its properties differ depending on the
production method and history. Commercial iron powders are classified in three types:
Reduced Iron dust.
Atomized Iron dust.
Electrolytic Iron dust
Depending on production method and are used in various applications, taking advantage of their respective
properties. Figure 1 shows the appearance of single particles of a representative reduced iron dust.
Although there is little difference in the external appearance, the cross- sections differ greatly. Fig 1 shows
the iron dust used in the project. Table 1 and Table 2 shows the chemical and physical properties of Iron
dust.
Component Percentage
Iron(Fe) 99 - 99.95
Atomic Number 26
Atomic Weight(g/mol) 55.845
Apparel density(g/cm3) 7.874
Electronegativity 1.83
Melting Point(oC) 1538
Boiling Point(oC) 2862
Magnetic Ordering Ferromagnetic
Poisson Ratio 0.29
Young’s 211
Modulus(GPa)
Iron dust procured was sieved to remove any impurities. The specimens (cubes and beams) were tested for
compressive and flexural tests. The tests were carried after curing period of 7 and 28 days with the help of
UTM (Universal Testing Machine) and Compression Testing Machine (CTM).
Mix of concrete = ( 1 : 1.539 : 2.591 ) (Design Mix of M 20)
Water/ Cement Ratio = 0.45
Coarse aggregate = 20 mm maximum size
Fine aggregate sand = zone II
Size of specimen:
1. Cube : (150×150×150) mm
2. Beam : (500×100×100) mm
Tests Results on cement: Ordinary Portland Cement (OPC) 43 grade (Khyber Cement) has been used for
this project. Various tests conducted on this cement are as under Table 3:
Table 3
Tests Results on Cement Value
Test results on Aggregates: Coarse aggregates of size 20 mm were produced from Ganderbal (Kashmir),
India stone crusher. River sand was procured from Ganderbal. Test results are shown in Table 4. Sieve
analysis graph of fine aggregates is shown in Fig 2.
Table 4
Tests on Aggregates Value
Fineness Modulus of Course 3.047
Aggregates
Grading zone of Sand Zone -1
Test results of Normal Concrete without any Iron dust (shown under Table 5)
Slump obtained = 25 mm
Compacting factor = 0.893
Table 5
Tests Results on Normal Value(N/mm2)
Concrete
7 day Compressive Strength 17.57
28 day compressive strength 26.27
7 day flexural strength 4
28 days flexural strength 5.27
Test results of Normal Concrete with 5% Iron dust (shown under Table 6)
Slump obtained = 23 mm
Table 6
Tests Results on Concrete(5% Value(N/mm2)
iron dust)
7 day Compressive Strength 19.70
28 day compressive strength 33.93
7 day flexural strength 5.15
28 days flexural strength 8.5
Test results of Normal Concrete with 8% Iron dust (shown under Table 7)
Slump obtained = 22 mm
Table 7
Tests Results on Concrete(8% Value(N/mm2)
iron dust)
7 day Compressive Strength 23.11
Test results of Normal Concrete with 10% Iron dust (shown under Table 8)
Slump obtained = 22 mm
Table 8
Tests Results on Concrete(10% Value(N/mm2)
iron dust)
7 day Compressive Strength 25.18
V. Comparison of result:
Fig 3 shows the comparison of results for 7 days of Normal concrete with varying percentages of Iron dust.
Fig 4 shows the comparison of results for 28 days of Normal concrete with varying percentages of Iron
dust.
Fig 5 shows the comparison of results for 7 days and 28 days of Normal concrete with varying percentages
of Iron dust.
VI. Conclusions
After careful and elaborate study of the use of iron dust by different percentages of cement in concrete, it
can be concluded that:
a) The addition of iron dust in concrete has resulted in general increase in 7 days compressive strength upto
10% of iron dust of the cement, also the long- term (28 days) compressive strength of Iron-Dust
concrete is comparable to normal concrete.
b) 7 days flexural strength of Iron-Dust concrete has decreased after 10% of the iron dust of the weight of
cement, same is the case with the 28 days flexural strength.
c) There is a progressive decrease in workability with increase in percentage of iron-dust in concrete.
d) Utilization of Iron-dust in concrete has provided us an excellent means of disposal of iron-dust.
VII. Acknowledgements
The authors are grateful to the administration of BGSB university for supporting the project throughout.
VIII. References
[1] Gambhir, M. L. (2013). Concrete Technology: Theory and Practice. New Delhi, India: Tata McGraw-
Hill Education.
[2] Shetty, M. S. (2005). Concrete Technology: Theory and Practice. New Delhi: S. Chand & Company
Ltd.
[3] Neville, A. M. (1994). Properties of Concrete. England: Longman Scientific and Technical.
[4] Shetty, M. S. (2005). Concrete Technology: Theory and Practice. New Delhi: S. Chand & Company
Ltd.
[5] Shetty, M. S. (2005). Concrete Technology: Theory and Practice. New Delhi: S. Chand & Company
Ltd.
[6] Kana, Y. C., Peib, K. C., & Chang, C. L. (2004, March). Strength and fracture toughness of heavy
concrete with various iron aggregate inclusions. Nuclear Engineering and Design, pp. 119-127.
[7] Cai, J. W., Wu, J. X., Lü, Z. H., & Liang , G. (2011, April). Effects of Powdery Mill Tailings from
Magnetite on Workability and Strength of Concretes. Key Engineering Materials, pp. 233-238.
[8] Brito, J. d., & Saikia, N. (2013). Recycled Aggregate in Concrete. Green Energy and Technology, pp.
214-216.