Document Archives

Elastic Properties of Concrete at High Temperatures.

• ID:

  775

• ESCSI:

  4267.010

• Author:

  Cruz, Carlos R.

• Publication Name:

  Journal of the PCA R and D Laboratories

• Type of Publication:

  Article

• Publisher:

  Portland Cement Association

• Dated:

  1966

• Issue/Volume:

  Jan. 1966, No. 1 Vol. 8

• Other ID:

• Page(s):

  37-45

• Reference List:

  Y

• Abstract:

  This paper discusses the moduli of elasticity and shear of concrete subjected to steady state conditions at various elevated temperatures. Values of the moduli were obtained from tests of right-circular cylindrical cantilever beams, statically loaded to produce bending and torsional stresses simultaneously. Tests were made at 75 F, 300 F, 600 F, 900 F and 1200 F.Concretes made with four types of aggregate and having two compressive strength ranges, 4000-4500 and 6000-6500 psi, were used. All specimens were moist-cured at 75 F for 3 days and then stored in air at 50 percent relative humidity and 75 F for 25 days. All tests were performed at the age of 28 days.
  It was found that the moduli decreased progressively as the temperature was increased. Upper and lower boundary functions for the reduction in the modulus of elasticity were determined from the experimental data.