An Overview of the Properties of High-strength Concrete Subjected to Elevated Temperatures

作者：Siddique Rafat^*; Noumowe Albert N

来源：Indoor and Built Environment, 2010, 19(6): 612-622.

DOI：10.1177/1420326X09346228

• High-strength concretes
• Elevated temperature
• Compressive strength
• Stress-strain relationship
• Permeability
• Porosity
• Pore size
• Modulus of elasticity
• Splitting tensile strength

Use of high-strength concrete (HSC) has become more prevalent over normal-strength concrete (NSC), and can be manufactured by ready-mixed concrete plants by using supplementary cementing materials such as silica fume (SF), fly ash, metakaolin, and water-reducing admixtures. HSC behaves differently from NSC at elevated temperatures or when exposed to fire. Efforts have been made by researchers to study the mechanical properties and durability aspect of HSCs. This paper presents an overview of the properties of HSCs subjected to elevated temperatures. This is the compilation of experimental results of the properties like; compressive strength, stress-strain relationship, permeability, porosity, pore size, modulus of elasticity, and splitting-tensile strength of HSC at elevated temperatures. This compilation would prove to be very helpful in understanding the behaviour of HSCs at elevated temperatures and for carrying out further investigation to establish standard guidelines for designing HSCs, subjected to elevated temperature or accidental fires, for its structural applications in buildings. The main advantage of using HSC in buildings/structures is its high thermal mass that leads to thermal stability.

• 出版日期2010-12