Document Type : Research Article

Authors

• Kian Asghari ¹
• Saeed Mehrabi ²
• Shahriar Tavousi Tafreshi ³

¹ Department of Civil Engineering, Faculty of Civil Engineering and Land Resources, Islamic Azad University Of Central Tehran Branch, Tehran, Iran

² Department of Civil Engineering, Faculty of Civil Engineering, Islamic Azad University of Aligudarz, Branch, Aligudarz, Iran

³ Department of Civil Engineering, Faculty of Civil Engineering and Land Resources, Islamic Azad University of Central Tehran Branch, Tehran, Iran

Abstract

Nowadays, concrete has received special attention due to reasons such as the ease of preparation of constituent components, low costs compared to other materials, favorable engineering properties, extraordinary durability, formability, and most importantly, positive interaction with the environment. Although the construction of concrete with the main components of cement, aggregate and water is very simple and conventional, but the addition of new materials such as fibers causes the fragility of concrete to be significantly reduced and it shows ductile behavior under different loads. Fibrous concrete is actually a type of composite that, with the use of reinforcing fibers in the concrete mixture, does not easily fall apart under the impact of impact loads, and its tensile strength increases above normal.Concrete gains very little strength at very low temperatures, so when the degree of saturation of the concrete is not sufficiently reduced by the dewatering action, it is necessary to protect the concrete against damage caused by freezing. The use of polyolefin fibers and the effect of appropriate granulation in the concrete mixing plan is one of the effective factors in reducing the effect of freezing. In this article, the reason for the use of polyolefin fibers, the manufacturing method, mechanical properties, fiber concrete applications, and the effect of mixing design granulation on the compressive strength and abrasion percentage of fiber concrete samples in the normal environment and freezing, according to the results of applications and researches has been discussed.

Keywords

• Polyolefin fibers
• Fiber concrete
• Granulation
• Mixing design
• Freezing environment