Low Temperature Behavior of Cellular Concrete

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Title: Low Temperature Behavior of Cellular Concrete

Author(s): Terry G. Richard

Publication: Journal Proceedings

Volume: 74

Issue: 4

Appears on pages(s): 173-178

Keywords: cellular concretes;compression tests;compressive strength; cryogenics; density (mass/volume); insulating concretes;low temperature; low temperature tests; mechanical properties; thermal conductivity; thermal properties;water-cement ratio.

Date: 4/1/1977

Abstract:
Cellular concrete has attractive potential as a load bearing insulation in large cryogenic applications. This investigation indicates that the thermal and mechanical properties of low density cellular concrete, coupled with its cost, ease of fabrication, and availability may make this material a feasible alternative to other more expensive load bearing insulations. Data obtained in this investigation illustrate significant increases in the strength and stiffness of selected densities, along with appreciable decreases in the thermal conductivity of cellular concrete at liquid nitrogen temperatures (- I96 C). This conclusion is supported by a characterization of the elastic modulus, secant modulus, ultimate compressive strength, and thermal conductivity of a range of dry densities from 25 to 90 pcf (0.4 to 1.4 g/cm:‘) at-196 C. These low temperature properties are compared to room temperature (23 C) response.