Title:
Florida’s Hot-Weather Concreting Specification
Author(s):
Michael Bergin and Christine Syed
Publication:
Concrete International
Volume:
24
Issue:
5
Appears on pages(s):
30-33
Keywords:
DOI:
Date:
5/1/2002
Abstract:
The decision to look to new methods for producing and placing concrete in hot weather came as a result of fluctuating environmental and marine conditions that often pose unique challenges for the State of Florida’s construction industry. High temperatures during placement may cause early-age cracking, especially in mass concrete, when the concrete cools. Also, high temperatures during curing may lead to delayed ettringite formation (DEF). The Florida Department of Transportation (FDOT) currently requires concrete temperature control plans from contractors constructing mass concrete structures. The Department is also currently funding research to determine the maximum allowable temperature in mass concrete that will eliminate both cracking and DEF. The Department’s intention is to establish a maximum allowable internal concrete temperature that will require contractors to have controls in place to mitigate heat gain developed during placement.