At Eglin AFB, we did a variety of weapons testing against "hard" (aka reinforced concrete) targets. We always "cured" the concrete for at least 28 days before a test. I think the rule of thumb was that the concrete reached 90% of its ultimate strength in that time.
Scott -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of WILTON Sent: Wednesday, August 05, 2009 10:55 To: Mercedes Discussion List Subject: Re: [MBZ] O/T Concrete Mixer Trivia Not necessarily INTENDED, it just naturally continues to cure for a very long time; curing curve is fairly steep for first 28 days then levels of and only APPROACHES 100 per cent; may never reach it. So, yes, concrete in Hoover Dam, or any dam, is still; curing. Wilton ----- Original Message ----- From: "Curt Raymond" <curtlud...@yahoo.com> To: "Diesel List" <mercedes@okiebenz.com> Sent: Wednesday, August 05, 2009 10:20 AM Subject: Re: [MBZ] O/T Concrete Mixer Trivia I read somewhere that the concrete inside of Hoover dam was intended to take some huge amount of time, like 50 years, to cure. -Curt Date: Wed, 5 Aug 2009 09:06:13 -0400 From: "LarryT" <l02tur...@comcast.net> Subject: Re: [MBZ] O/T Concrete Mixer Trivia To: "Mercedes Discussion List" <mercedes@okiebenz.com> Message-ID: <61d8f2c2ab0f4c578e9d381afbdb7...@toshibalaptop> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original concrete trivia ;-) When building very large concrete structures, like dams, pipes are built into the concrete so cooling water can circulate to keep the concrete cool as it cures to prevent cracking. New slabs are wet down & covered with plastic dropcloths to keep the water from evaporating too quickly. The curing is a chemical reaction between the cement and water - even if it's cold, once the reaction starts it will create its own heat - Larry T 91 300D -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20090805/db fdd378/attachment.html> _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
