Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6715702 | Construction and Building Materials | 2018 | 8 Pages |
Abstract
Today, the advancement of technology and the achievement of increasing innovations in the field of building materials have increased high-strength concrete (HSC) production. The use of this material has been increased due to economic and technical reasons in the construction of concrete sections. However, the more compressive strength of the concrete is, the more concrete becomes brittle and its tensile strength does not increase with increasing compressive strength. HSC is also more vulnerable to high temperatures due to its high density and low porosity compared to conventional concrete. Researchers have proposed different methods including the use of polypropylene fibres in concrete mix designs in order to overcome these defects of HSC. In this study, a new type of polypropylene fibres, called high performance synthetic macro polypropylene fibres (HPP), have been used in dosages of 1, 2 and 3â¯kg/m3. Tests on hardened concrete include compressive strength, tensile strength and flexural strength at temperatures of 25, 100, 200 and 300â¯Â°C. By adding 1â¯kg of fibres to HSC, its compressive strength, tensile strength and flexural strength increased up to 14, 17 and 8.5%, respectively. Furthermore, the greatest improvement in the mechanical properties of concrete exposed to high temperatures was obtained when 1â¯kg/m3 of fibres was added to HSC.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Reza Abaeian, Hamid Pesaran Behbahani, Shahram Jalali Moslem,