Thermal Expansion of Concrete and Reinforced Concrete


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Thermal Expansion of Concrete and Reinforced Concrete

Author(s): Carl Berwanger and A. Faruque Sarkar

Publication: Journal Proceedings

Volume: 73

Issue: 11

Appears on pages(s): 618-621

Keywords: age: composite construction (concrete and steel); compressive strength; expansion: freezing; low temperatures;plain cancrete: reinforced concrete; reinforcing steels: thermal expansion: thermal properties;thermal stresses;water-cement ratio.

Date: 11/1/1976

The thermal coefficient of expansion of concrete and reinforced concrete have been determined under short-term steady state temperatures, - IO0 to 150 F (-73 to 66 C). Specimens were cured both satuuratad and air-dried in the laboratory and tested at 7, 28, and 84 days and at I year. One hundred and twenty-five 3 x 4 x I2 in, (7.6 x IO x 30.5 cm) reinforced concrete prisms were tasted for thermal coefficient of expansion. The coefficient decreased with increase in the water-cement ratio, increased with age, and was smaller below the freezing point of the concrete. The saturated concrete had lower coefficients than the air-dried concrete. Steel reinforcement ranged from 0 to about 5 percent. The coefficient for symmetrically reinforced concrete increased with the steel percentage. 1: For unsymmetrically reinforced concrete, the coefficient for the face at the steel increased and the coefficient for the opposite face decreased with increased steel. Eighty-four 6 x I2 in. (15.2 x 30.5 cm) concrete control cylinders wet tested for compressive strength and static modulus of elasticity of concrete.