International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 06 | Jun 2022
p-ISSN: 2395-0072
www.irjet.net
Mechanical and Statistical Study of Seawater Mixed Concrete Anjitha S Kumar1, Geethika G Pillai2, Dr. Ajmal Muhammed 1Mtech
Student, Dept. of Civil Engineering, Indira Gandhi Institute of Polytechnic and Engineering, Kerala, India Professor, Dept. of Civil Engineering, Indira Gandhi Institute of Polytechnic and Engineering, Kerala, India 3Head of the Department, Dept. of Civil Engineering, Indira Gandhi Institute of Polytechnic and Engineering, Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------2Assistant
Abstract - The need for fresh water in daily life has
etc., have an impact on corrosion activity. Today, corrosion inhibitors, chemical admixtures, and mineral admixtures are used to strengthen the link between concrete and rebars and to increase the corrosion resistance of reinforced concrete structures. Due to its widespread occurrence in a variety of construction types and the significant expense of repairing these structures, the corrosion of reinforcing steel in concrete has drawn more attention in recent years. In fact, corrosion of the steel reinforcing concrete is a developing global issue. When reinforced concrete structures are exposed to hostile environments, reinforcement corrosion is the most frequent damage process that occurs.
increased, but the potential sources of water are decreasing, thus we must consider alternate methods of obtaining water for construction projects. Many physical, chemical, and electrochemical degradation processes happen simultaneously on reinforced concrete structures exposed to coastal environments. It is crucial that these structures have a lengthy service life and be able to survive the ravages of time and the damaging effects of the harsh environmental conditions with little need for maintenance given the enormous cost involved in initial construction, repair, and rehabilitation. Studying the impact of bond strength and corrosion of rebars in concrete is crucial to extend the service life of these buildings. This study will use concrete of various grades to examine the impact on the sorptivity of concrete, bond strength, and corrosion resistance of the rebar in concrete.
Steel reinforced concrete's structural performance depends on how well the steel rebar adheres to the concrete. Pure water supplies are being used up more quickly than they can be replenished, which has a negative economic impact on the construction industry. Due to the scarcity of drinking water, the construction sector now uses seawater. The use of seawater could pose major risks such concrete spalling and cracking, corrosion of rebars, decreased bond strength, and others.
Key Words: Seawater Concrete, Corrosion inhibitors, Compression, Bond Strength, Sorptivity.
1. INTRODUCTION One of the most often utilised building materials is concrete. Concrete is frequently used because of its strength, ease of shaping into desired forms, durability, and other qualities. The building sector has seen enormous transformation as a result of improvements in concrete, such as reinforcing and pre-stressing processes. A significant area of civil engineering, concrete technology is always being researched and advanced. Man can now construct sturdy structures wherever he wants. For the construction of high-rise buildings, storage vessels, underground structures, maritime structures, structures exposed to harsh atmospheric conditions, etc., reinforced concrete structures with greater strength and durability are employed.
It is important to examine the issue of reinforcing corrosion and strength when using seawater to mix cement in concrete. Various dissolved salts, such as calcium sulphate, magnesium sulphate, sodium chloride, and magnesium chloride, are present in seawater. All chlorides have the tendency to hasten cement setting and increase the initial strength of concrete. On the other hand, the sulphates have a tendency to delay cement setting and reduce the early strength of concrete. It is discovered that the combined result of these two conflicting processes is a strength loss of concrete of between 8 and 20%. It has been discovered that, as long as the concrete is dense and the reinforcement is well covered, seawater does not cause the reinforcement to corrode.
Steel reinforcement corrosion during service causes issues with durability for reinforced concrete structures. Highly porous, fragile, and frequently found surrounding reinforcing steel, corrosion products have a number of interrelated impacts. These impacts significantly shorten the service life and load-bearing capacity of reinforced concrete elements. Numerous parameters, including cement type, concrete permeability, concrete cover, concrete pH value, concrete carbonation, the presence of corrosion inhibitors,
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1.1 Objectives
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To carry out a mechanical and statistical analysis of seawater-mixed concrete.
Based on the many studies that have already been conducted, conduct a comparative analysis of the usage of different corrosion inhibitors in concrete.
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