Title:
Temperature Related Cracking in an
Underground Chamber Ceiling
Author(s):
Gary R. Mass and C. H. Yeh
Publication:
Concrete International
Volume:
5
Issue:
4
Appears on pages(s):
42-48
Keywords:
ambient temperature; compressive strength; computer programs; cracking (fracturing); finite element method; heat of hydration; heat transfer; linings;
mass concrete; mix proportioning; modulus of elasticity;
DOI:
Date:
4/1/1983
Abstract:
Presents a case history of severe cracking in a concrete-lined ceiling of an underground machine hall. Overbreak during evcavation and a high heat-pro-ducing concrete mixture contributed to a steep temperature gradient within sections of the concrete lining shortly after placement. A computer program for two-dimensional heat transfer analysis was used to estimate the temperature gradient for various thicknesses of concrete. Tensile stresses at the surface and tensile strength of the concrete were also esti-mated. Means of reducing temperature gradient and stress level were investigated.