Estimating Maximum Temperature Difference in Mass Concrete

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Title: Estimating Maximum Temperature Difference in Mass Concrete

Author(s): Ronald Kozikowski and Bruce Suprenant

Publication: Special Publication

Volume: 325

Issue:

Appears on pages(s): 5.1-5.14

Keywords:

Date: 7/25/2018

Abstract:
To minimize thermal cracking, specifications for mass concrete often state a maximum allowable temperature difference, ΔT, between the hottest interior location (usually the center) and surface of the mass concrete section in the days following placement. Section 8 of ACI 301-05, “Specifications for Structural Concrete,” did not set such a limit, but the recent revision, ACI 301-10, sets a default value of 35F for the difference (see box). The 35F difference is based on experience with unreinforced mass concrete dams where the consequences of cracking and subsequent water leakage were critical. For mass concrete in mat foundations, large piers, and thick walls, 35F may be unduly conservative.