Effect of High Temperature on Tensile Strength of Different Types of High-Strength Concrete

作者：Khaliq W^*; Kodur V K R

来源：ACI Materials Journal, 2011, 108(4): 394-402.

DOI：10.14359/51683112

• fiber reinforcement
• fire resistance
• fly ash
• self-consolidating concrete
• spalling
• splitting tensile strength

The strength and stiffness properties of concrete deteriorate with an increase in temperature as encountered during exposure to fire. High-temperature tensile strength is crucial in evaluating the extent of spalling and fire resistance of concrete structures. This paper presents the variation of tensile strength of new types of concrete as a function of temperature. Specimens made of high-strength concrete (HSC); fiber-reinforced concrete (with steel, polypropylene, and hybrid fibers); self-consolidating concrete; and fly-ash concrete are tested at various temperatures in the 20 to 800 degrees C (68 to 1472 degrees F) range to measure splitting tensile strength. The test results indicate that the presence of steel and hybrid fibers slows the loss of tensile strength of concrete with temperature. Data generated in these tests are used to develop simple relationships for expressing tensile strength as a function of temperature. These relationships can be used as an input parameter in computer models for evaluating the spoiling and fire resistance of HSC structural members.

• 出版日期2011-8