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Title: Concrete Q & A: How Low Is Too Low for a 7-Day Cylinder Break?

Author(s):

Publication: Concrete International

Volume: 32

Issue: 2

Appears on pages(s): 74-76

Keywords:

DOI:

Date: 2/1/2010

Abstract:
Specifications for our job require casting one cylinder to be tested at 7 days, two cylinders for testing at 28 days, and one backup cylinder to be tested at a later date if the results of the 28-day test don’t meet specification requirements. What action should be taken when 7-day results are unsatisfactory, but concreting beyond the member from which concrete was sampled has already progressed substantially?