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Title: Effect of Cold Curing Water on Hot Concrete Flatwork: Field Study

Author(s): Ronald Kozikowski and Kevin Rowswell

Publication: Symposium Paper

Volume: 338


Appears on pages(s): 45-52

Keywords: curing, cooling, cracking, slabs

Date: 3/1/2020

Several documents have indicated that applying curing water cooler than the concrete surface by more than 20⁰ F (11⁰ C) can produce a strain of about 100 millionths, exceeding the concrete’s strain capacity, and resulting in cracking. Earlier work by the senior author and others has questioned the origin and applicability of the 100 millionths strain capacity for early-age concrete. Tests on small-scale specimens demonstrated that using curing water as much as 55⁰ F (34⁰ C) cooler than the concrete surface did not result in crazing or cracking. This paper describes a study in which cold curing water was used on a large concrete slab under field conditions. Experimental results suggest that at least a 50°F (32°C) temperature difference between curing water and a concrete slab can be withstood without causing surface crazing or cracking.


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