Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Investigating the behavior of lightweight structural concrete reinforced with fibers by laboratory method

Document Type : Original Article

Authors
1 Assistant Professor, dept. civil engineering, Islamic Azad University, Kermanshah, Iran
2 Department of Civil Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Abstract
The use of natural and artificial lightweight materials is a suitable solution to reduce the dimensions of the structure, minimize the seismic force of concrete structures, increase the speed and ease of implementation, and finally reduce the costs of construction and maintenance of concrete structures. In this article, the effect of the use of Leca and Perlite aggregates on the mechanical properties of lightweight concrete was investigated. In the following, by adding different percentages of basalt and polymer fibers to the light concrete mixing plan, the effects of fibers on the mentioned mechanical properties and also the volume of consumed materials were investigated. The results showed that the specific weight of lightweight concrete made with Leca and Perlite is 25-30% lower than normal concrete, which has a direct relationship with the compressive strength, tensile strength and modulus of elasticity. So that the use of the mentioned light aggregates reduced the compressive strength, tensile strength and modulus of elasticity by 44.88-75%, 17.13-36% and 8.5-30%, respectively, compared to normal weight concrete. On the other hand, the use of the optimal percentage of polymer fibers increased the tensile strength and modulus of elasticity by 14.65% and 21.5%, respectively, compared to the reference sample of the first group (normal weight concrete), and the compressive strength was slightly lower. On the other hand, the addition of fibers in the light concrete mixing plan, due to the improvement of mechanical properties, saves the consumption of materials and reduces the cost of making light concrete.
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  • Receive Date 14 December 2023
  • Revise Date 29 May 2024
  • Accept Date 04 July 2024