Mass Concrete Pour Techniques for the Mat Foundation of 1100 Alakea Plaza

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Title: Mass Concrete Pour Techniques for the Mat Foundation of 1100 Alakea Plaza

Author(s): A. R. Dar

Publication: Special Publication

Volume: 152

Issue:

Appears on pages(s): 187-202

Keywords: concretes; construction joints; heat of hydration; joints (junctions); mass concrete; mat foundations; thermal gradient; thermocouples; Construction

Date: 3/1/1995

Abstract:
In large concrete pours, the heat of hydration, which continues to build for several days, is a major cause of concern for structural engineers. As the surface of concrete cools off, a thermal gradient is formed across the concrete section which can cause the concrete to crack. This paper verifies that by keeping concrete warm and preventing heat from escaping rapidly, the temperature difference within the mass can be minimized, thus reducing the potential for thermal cracking. Use of this technique made possible the largest monolithic mat foundation pour in Hawaii, without construction joints and without artificial cooling of concrete.