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Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

(OP)
Dear All;

Can someone help me locating any International Standard (ACI, ASTM, BS EN, CIRIA) that specifies;

1. MAX ALLOWABLE TEMPERATURE AT THE CORE OF A MASS CONCRETE STRUCTURE (THICKNESS > 1.0 METER)
2. MAX ALLOWABLE DIFFERENTIAL TEMPERATURE BETWEEN THE CORE AND THE SURFACE OF THE MASS CONCRETE STRUCTURE

I tried searching all ACI documents relating to Mass Concrete but they are very general. I believe there is one CIRIA publication that specifies.... Please shed some light.

Thanks in advance

RE: Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete


I had researched item 2 earlier this year and found a recommendation that the temperature differential should not exceed 30 degrees F. Can't seem to find the reference for that number.

Ralph
Structures Consulting
Northeast USA

RE: Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

ACI has a document covering thermal and cracking. ACI 207.2R-07. I believe it addresses internal temperature.

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

RE: Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

ACI 310-10 Section 8 covers mass concrete and answers your two questions.

RE: Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

Try the CIRIA document "Early Thermal Cracking" which is used by practically all UK consultancies when designing for ETC in concrete sections

RE: Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

For the above search for C660 on CIRIA's website. The (now superseded) DMRB document was also used extensively before, and might be worth looking at for a first stab. The calculation method is only a couple of lines compared to the 360 page epic that is the CIRIA guide! http://www.dft.gov.uk/ha/standards/DMRB/vol1/secti...

RE: Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

ukbridge - I found a copy of C660, dated 2007, that is only 32 pages. Is there another version?

Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/

RE: Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

No, thats probably just a preview. The full document is much longer than that. Thinking about it, the guide might not be applicable to regions outside the UK as the temperature differential is a function of the heat of hydration and the atmospheric conditions. The guide is probably well worth a read for qualitive advice at least

RE: Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

Quote (ukbridge)

No, thats probably just a preview. The full document is much longer than that. Thinking about it, the guide might not be applicable to regions outside the UK as the temperature differential is a function of the heat of hydration and the atmospheric conditions. The guide is probably well worth a read for qualitive advice at least

Yes, I should have had a look at it. It was only the contents and the introduction.

Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/

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