max concrete temp at placement
max concrete temp at placement
(OP)
Most specs require concrete temp to be max 90F at time of placement.
Please remind me where in ACI this comes from. I looked all through 318 but couldn't find this info.
Please remind me where in ACI this comes from. I looked all through 318 but couldn't find this info.





RE: max concrete temp at placement
318 is the design code.
RE: max concrete temp at placement
Both C 94 Section 11.8 and C 685 Section 9.2 state the max temp shall not exceed 90 deg F.
RE: max concrete temp at placement
What if the concrete is produced with aggregate, water or both that is NOT heated?
ACI301 5.3.2.1.c Hot weather—The temperature of concrete
as placed shall not exceed 32°C (90°F) unless otherwise permitted.
I guess that by definition, hot weather is any weather that does not fall under the definition of cold weather described in 4.2.2.7.
RE: max concrete temp at placement
The ACI guide for hot weather concrete is ACI 305. The copy I have is outdated. However, check this link http://www.aci-int.org/FAQ/afmviewfaq.asp?faqid=17