05-11-2014, 04:14 PM
Abstracts: The concept of using fibers in concrete to improve resistance to cracking and fragmentation is old and intuitive. During the last 30 years different types of fibers and fiber materials were introduced and are being continuously introduced in the market as new applications. These fibers can be made of metals, natural, glass or organic materials. In the past three decades, extensive research on fiber reinforced concrete has shown that some types of fibers can be added to concrete to improve its durability and physical properties such as cracking induced by plastic shrinkage, drying shrinkage and on the surface of fresh and mature concrete due to the severe environmental conditions. In this project, commercially available synthetic fibers namely, polypropylene, is used to study the effects of polypropylene fiber used for reinforcing concrete mixes and to obtain basic strength. The compressive, splitting tensile strength tests were performed by changing fiber weight content from 1.0% to 3.0% of the cement weight content. As a result, it was found that the use of polypropylene fiber, The compressive strength and splitting tensile strength has increasing with (1.0%) of fiber than start decrease with increase the fiber quantities. Compared to corresponding plain concrete, there was a favorable decrease in drying shrinkage and creep of specimens containing various fiber content.