Effects of Temperature and Strain-Rate on the Compressive Strength of Concrete

Abstract:

Dynamic compressive tests were carried out for concrete specimens after exposure to temperatures 23°C, 400°C, 600°C and 800°C by using Split Hopkinson Pressure Bar(SHPB) apparatus. Cylindrical specimens with 98mm in diameter and 49mm in length were used in tests. The strain rates achieved in tests ranged from 30s-1 to 220s-1. The results showed that the compressive strength increases with increasing strain-rate, but decreases with the increase of temperature. However, the effect of strain-rate on improving the compressive strength of concrete decreases with the increase of temperature. Moreover, the strain-rate has an improvement on the peak strain of concrete, and the accretion rate increases with increasing temperature.

• Periodical: Advanced Materials Research (Volumes 168-170)
• Pages: 2619-2624
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.168-170.2619
• Online since: December 2010
• Authors: Chuan Xiong Liu, Yu Long Li
• Keywords: Compressive Strength, Concrete, Peak Strain, Split Hopkinson Pressure Bar (SHPB), Strain Rate, Temperature

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