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RE: Concrete - Cube Strength vs. Cylinder Strength

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I have found out that this topic has not been well studied.  But some of my BSSC and ASCE 7 colleagues have come through.  One of my BSSC colleagues launched an international search in Japan and Europe for research.  As it turns out the ratio varies with the f'c, so there is no one relationship that works across the board. 
But I have collected enough information to develop acceptance criteria for my Afghan work. 

Regards, Harold Sprague


To: seaint(--nospam--at)
Subject: Re: Concrete - Cube Strength vs. Cylinder Strength
From: Tom.Hunt(--nospam--at)
Date: Thu, 7 Jan 2010 07:27:04 -0800


You might also note that the 2008 ACI-318 now allows a concrete test to be the average of either two 6" x 12" cylinders or three 4" x 8" cylinders.

Thomas Hunt, S.E.

Harold Sprague <spraguehope(--nospam--at)>
01/05/2010 08:27 AM
Please respond to seaint
Concrete - Cube Strength vs. Cylinder Strength

I have found some studies from the internet that link cylinder strength tests to 6" (British std.) cube strengths.

I have a couple of questions:
1.  Is there anything more definitive from ACI or ASTM that help us in international work?
2.  What are some other standard specimen sizes for determining concrete strength for other countries?

Regards, Harold Sprague


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