International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 07 Issue: 01 | Jan 2020
p-ISSN: 2395-0072
www.irjet.net
Exploratory Investigation on Light Weight Concrete with Pumice Stone as a Partial Substitution of Coarse Aggregate Akshay Suresh Lad1 1M.Tech,
MITCOM, MIT Art, Design & Technology University, Pune, Maharashtra ----------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Lightweight concrete in today’s world has a high number of applications as the structural demands are increasing it has many applications in the concrete and construction industry nowadays. In this experimental study, an attempt has been made to compare the conventional concrete with the lightweight concrete which is made by partially replacing the coarse aggregate with Pumice aggregate using a mix of M30. The lightweight concrete has been made by partial replacement of coarse aggregate with the varying percentage of pumice aggregate from 8%, 16%, and 24%. This experiment is focused to determine the strength parameters of the newly designed concrete, to find the most favorable replacement from the above-mentioned replacements and the results are compared with that of the conventional concrete.
concrete has a density in the range 1440 to 1840 kg/m3 compared to conventional concrete with a density in the range of 2200 to 2600 kg/m3. But the concrete should have a minimum strength of 17 MPa in order to be used as structural concrete. Some lightweight aggregates which can be used in lightweight concrete are shale, pumice, foam, clinker, and perlite.
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Key Words: Light Weight Concrete, Pumice Aggregate, Natural Aggregate, Compressive Strength 1. INTRODUCTION
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Impact Factor value: 7.34
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Efficient in terms of transportation and reduces labor demand.
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Lower coefficient of thermal expansion
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High strength in earthquakes Disadvantage of Light Weight Concrete:
Longer mixing time as compared to conventional concrete
Sensitive to water content
High water demand due to porous nature of light weight aggregate Types of light weight aggregate: Artificial lightweight aggregate Artificial cinders Coke breeze Foamed slag Expanded shale Expanded perlite Thermocol beads
Pumice Stone:
Pumice stone is a natural lightweight aggregate that has its origin from the sudden cooling of the molten volcanic matter such as lava. Pumice stone is a colorless or light grey colored coarse aggregate. Pumice stone specific gravity is 1.04 and the constituents are silica (70%) and alumina (14%), along with iron oxide as 2.5%, calcium oxide as 1%, and sodium oxide as 9%.
Structural lightweight concrete is a type of concrete that includes an expanding agent in it that increases the volume of the mix while reducing the self-weight. Structural lightweight
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Fast and easy construction.
Natural Lightweight aggregate Pumice Diatomite Scoria Volcanic cinders Sawdust Rice husk
1.1 Light Weight Concrete:
© 2020, IRJET
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1.1.2
Concrete is a composite mixture that is obtained by mixing cement, sand, gravel, and water in fixed proportions. These days concrete is used in wide varieties for the structural purpose, the conventional concrete has high self-weight and the density ranges from 2200 to 2600 kg/m3. Due to high self-weight, it becomes uneconomical material to some extent. So, many attempts have been made in order to reduce the self-weight of the concrete and to increase its efficiency as a structural mixture. Aggregate is one of the vital ingredients in term of quality and holding of concrete, it can be further classified into different categories according to their shape such as rounded, angular, flaky, irregular, etc. it can be further divided according to surface texture, i.e. smooth, rough, porous, honeycombed, glassy. By the integrity of aggregates density, the concrete produced is quite heavy having a density of about 2400kg/m3 and by reducing the density of the concrete mix it will lead to an economical construction as it reduces the cost in transportation, handling, and constructability. One of the methods to produce lightweight concrete is the introduction of lightweight aggregate and air-entraining agents. Using lightweight aggregate in the concrete mix results in the reduction of the self-weight of the concrete and it also helps in quick construction and handling of concrete.
Advantages of Light Weight Concrete:
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