Maximum Allowable Heat of Hydration and Differential Temperatures in Mass Concrete

[concreteworld]

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

 

[RHTPE]

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

 

[ornerynorsk]

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.

 

[TXStructural]

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

 

[ukbridge]

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

 

[ukbridge]

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 The (now superseded) DMRB document was also used extensively before, and might be worth looking at for a first stab.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/section3/bd2887.pdf

 

[IDS]

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/

 

[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

 

[IDS]

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/