Vol. 4 Issue 3
Year: 2014
Issue: Jun-Aug
Title:Reducing The Life Cycle Cost of Reinforced Concrete Structures by using Fiber in Concrete
Author Name:Badrinarayan Rath, Shirish Deo and Gangadhar Ramtekkar
Synopsis:
A major challenge for concrete in today’s engineering is to build structures with lowest possible life cycle cost for sustainability. One of the major problems with reinforced concrete structures is the corrosion of steel reinforcement. It is one of the primary causes of premature deterioration of RCC (Reinforced Cement concrete) structures. The damage caused by corrosion seriously limits the service life of many concrete structures. The cost to rehabilitate these deteriorated concrete structures is expensive. As a result, over the past two decades, extensive research has been conducted to improve the durability of existing and new concrete reinforced structures. Plain concrete is a brittle material, with low tensile strength and strain capacities. To help overcome these problems, there has been a steady increase over the past years in the use of fibre reinforced cements and concretes (FRC). In general, the most important advantage of adopting Steel Fiber Reinforced Concrete (SFRC) is the increase of tensile strength, enhancement of toughness and increased resistance to crack propagation with the help of stress transfer from the matrix to the fibres. Addition of fibres has also shown modest increase in compressive strength. FRC thus exhibits strain hardening behaviour after first cracking as well as improvement in energy absorption capacity. Reduction of cracks shall increase initiation period of corrosion of reinforcement in RCC by many years, thereby increasing durability and reducing service life cost of the structure
Year: 2014
Issue: Jun-Aug
Title:Reducing The Life Cycle Cost of Reinforced Concrete Structures by using Fiber in Concrete
Author Name:Badrinarayan Rath, Shirish Deo and Gangadhar Ramtekkar
Synopsis:
A major challenge for concrete in today’s engineering is to build structures with lowest possible life cycle cost for sustainability. One of the major problems with reinforced concrete structures is the corrosion of steel reinforcement. It is one of the primary causes of premature deterioration of RCC (Reinforced Cement concrete) structures. The damage caused by corrosion seriously limits the service life of many concrete structures. The cost to rehabilitate these deteriorated concrete structures is expensive. As a result, over the past two decades, extensive research has been conducted to improve the durability of existing and new concrete reinforced structures. Plain concrete is a brittle material, with low tensile strength and strain capacities. To help overcome these problems, there has been a steady increase over the past years in the use of fibre reinforced cements and concretes (FRC). In general, the most important advantage of adopting Steel Fiber Reinforced Concrete (SFRC) is the increase of tensile strength, enhancement of toughness and increased resistance to crack propagation with the help of stress transfer from the matrix to the fibres. Addition of fibres has also shown modest increase in compressive strength. FRC thus exhibits strain hardening behaviour after first cracking as well as improvement in energy absorption capacity. Reduction of cracks shall increase initiation period of corrosion of reinforcement in RCC by many years, thereby increasing durability and reducing service life cost of the structure
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