ArchitectureWeek - Puzzler Answer #103

Answers . 26 June 2002


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Quizzical Pursuit
—The Architecture Puzzler

Created by Dave Guadagni

Solution to Last Week's Puzzler
Architecture Puzzler #103

Question

The approximate setting time for concrete at 70 degrees Fahrenheit (21 degrees Centigrade) is six hours. How long would you guess the setting time is at 40 degrees F. (4 degrees C.)? At 20 degrees F. (-7 degrees C.)?

Answer

At 40 degrees F. (4 degrees C.), concrete setting time is about 14 hours, at 20 degrees F. (-7 degrees C.), concrete freezes and does not set.

Okay, got it? Now try this week's Puzzler:

http://www.ArchitectureWeek.com/quiz.html

Dave Guadagni, AIA, is an architect with Robertson/Sherwood/Architects

Pouring concrete for the Panama Canal.
Photo: www.arttoday.com

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