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Investigating the Effect of Sintered Fly Ash Aggregate on Mechanical Properties of Concrete: A Review

•   Mr. Hamed Hasani ,  Department of Civil Engineering, University of Birjand ,   
•   Ms. Atefeh Soleymani ,  Departement of Civil Engineering, Shahid Bahonar University , kerman ,   
•   Dr. Hashem Jahangir ,  Birjand university ,   
•   Mr. Mohammad Bashir Azizi ,  Department of Civil Engineering, University of Birjand ,   

Major Topic: Concrete Structures|سازه های بتنی

Abstract

The use of industrial waste as a building material plays an important role in sustainability. During the combustion of pulverized coal, fly ash is generated as a waste product. An overview of research on the use of sintered fly ash aggregate for the production of light-weight structural concrete is presented here. In this paper, the aggregate properties of fly ash are also determined by the physical, chemical, and pelletizing parameters of the flash. This paper also discussed temperatures and durations of sintering and their significance. A description of the sintered fly ash aggregate's mechanical and physical properties was also provided. Literature review indicates that such aggregates are 16–46% lighter and have a higher water absorption capacity than normal-weight aggregates. The concrete produced with sintered fly ash concrete exhibited high strength and mechanical properties as well as durability.. The compressive strengths of sintered fly ash aggregate concrete range from 27-74 MPa, and the densities range from 1651-2017 kg/m3. Fly ash aggregate concrete seems to perform well in terms of structural applications. Sintered fly ash aggregate concrete has been identified as potential structural concrete material.

Keywords

Fly Ash Aggregates; Mechanical Properties of Concrete; Sustainability; Durability

• Fly ash for construction cannot be generated, characterized, or used without understanding how it is produced.
• In addition, fly ash is diverted from landfills, reducing the need for OPC. A cleaner production process can also be achieved by reducing air pollution, emissions, and solid waste.
• The physical, chemical and mineralogical characteristics of fly ash make it an inherently complex material. The combustion temperature, cooling rate, and composition of fly ash all influence its physical and cementitious properties.

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