Effect on The Properties of Concrete and Mortar, with Partial Replacement of Cement to Rice Husk Ash and Sand to Marble Dust Slurry
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Date
2015
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Publisher
MPUAT, Udaipur
Abstract
Concrete is a widely used structural material. Fine aggregate is one of the essential
components of concrete. Natural river sand is the most commonly used for fine
aggregate. However, increase in demand and depletion of river sand, along with
restrictions imposed on the exploitation of the river sand, have resulted in search for a
suitable alternative. On the other hand, industrial wastes have continued to increase due
to the continued demands of resource use by humans and dumping or disposal of these
materials causes environmental and health problems. Therefore, recycling of waste
materials are great potential in concrete industry.
Very recently, several researchers have used manufactured fine aggregate as a partial
replacement of natural sand, and investigated its effect on major concrete properties.
Similarly, Marble dust slurry, fine aggregate could be an alternative to natural sand. It is
a by-product generated from stone industry during the production of Marble by Cutting
and Finishing processes (wet process). Marble dust slurry, which are generally
considered as a waste material, cause an environmental load due to disposal problem.
Hence, the use of Marble dust slurry as fine aggregate in concrete and mortar mixtures
will reduce not only the demand for natural sand but also the environmental burden.
Moreover, the incorporation of Marble dust slurry fine aggregate will offset the
production cost of concrete and mortar. In brief, the successful utilization of Marble
dust slurry fine aggregate will turn this waste material into a valuable resource.
The use of industrial and biogenic wastes in concrete as supplementary cementing
materials is the present vital issue to obtain a sustainable environmental solution, save
energy and natural resources. Some of the commonly used supplementary pozzolanic
and cementing materials are rice husk ash (RHA), Silica fume, ground granulated blast
furnace slag, fly ash and ash from timber etc. These waste can be found as natural
materials, by-products or industrial wastes; these materials are also obtained with
requiring low cost, energy and time.
Rice husk, basically an agricultural residue, is obtained from rice processing mills of the
developing countries. Only a small amount of produced husk is used as fuel in rice mill
and electricity generating power plant. After burning rice husk, the RHA is produced as
a by-product, about 20% of its original weight.
In the present study, the replacement level of Marble dust slurry with natural sand (river
sand) and Rice Husk Ash with cement optimised. The influence of optimised
combination of MDS on fresh (slump) and hardened concrete properties (Compressive
strength, flexure strength and Modulus of Elasticity) in concrete were assessed. Further,
the possibility of using MDS in masonry mortar and plaster mortar was explored. An
attempt was also made to standardise the mason defined consistency through an
empirical apparatus. From the results obtained in this study, it is clear that the Marble
dust slurry can be used as a suitable replacement material in concrete and mortar
applications.
In this project, the partial replacement of Rice husk ash with cement and Marble dust
slurry with sand has been tested at different ratio such as 0%,5%10,%15%,20% and
25%. On the different mixture and different ratio of w/c, the cube of
150mm*150mm*150mm and 70.7mm*70.7mm*70.7mm has been tested on 7days,
28days and 90days.
On the basis of above test, the partial replacement of Rice husk ash and Marble dust
slurry, has given the better result. This research emphasises on the using waste
materials, and this research can be useful to the construction industry. This will help us
to save environment and improve the eco-system.
We can conclude by above research that the partial replacement of Rice husk ash and
Marble dust slurries, gives best compressive strength and flexural strength at the
appropriate percentage i.e. 10% to 20%, but the strength reduced if the percentage of
replacement is increased.
Description
Effect on The Properties of Concrete and Mortar, with Partial Replacement of Cement to Rice Husk Ash and Sand to Marble Dust Slurry
Keywords
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Citation
Patidar and Shekhawat, 2015