01553178

Component

https://doi.org/10.3141/2508-13

A spreadsheet program based on a two-dimensional (2-D) finite difference method was employed to analyze the thermal behavior of two bridge pier caps, and analysis results were compared with recorded concrete temperatures from the field. Tests were performed in the laboratory to determine the rate of heat generation of the identical concrete mixtures used in the construction. The activation energy of each mix design was determined following the ASTM C1074 procedure to implement the equivalent age concept to the temperature predictions. Results showed that concrete temperature time histories at the center and the side surface of the bridge pier caps could be predicted reasonably well by using the 2-D finite difference model. This spreadsheet can be a useful tool to help engineers make critical decisions, such as formwork removal time, insulation practices, and precooling and postcooling methods, and minimize the risk of early-age thermal cracking in mass concrete structures.

01588951

15-5698

English

pp 102–110

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369350

Print

Figures (6) ; Photos; References (17) ; Tables (3)

Bridge piers; Concrete construction; Concrete structures; Heat; Mathematical prediction; Spreadsheets; Temperature gradients; Thermal degradation; Thermal stresses

West Virginia

Bridges and other structures; Construction; Highways; Materials; I32: Concrete; I53: Construction of Bridges and Retaining Walls

TRIS, TRB, ATRI

Dec 30 2014 1:55PM

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