It was definitely not related to the temperature of the concrete or steel. Concrete placement began at 5:00 a.m. one morning and ice was added to the mix to keep the temperature within spec.
Answers to questions:
Q: What size is your coarse aggregate?
A: ASTM C33, No. 57 (from 1” to No.4).
Q: What is the slump after Super-P addition?
A: Slump not taken after the addition of Super-P. Half the maximum recommended dose is being used.
Q: Why are you adding plasticizer at site?
A...
Thanks for the feedback! The clear cover over the reinforcing is definitely not the issue here (photo attached). The top mat of reinforcment is set to elevation with a laser and the top of concrete is at elevation. Slump is just under 4" prior to plasticizer being added on site. Only half...
We have a project in which the reinforcing pattern is showing in the surface of the concrete after it has set (photo attached). The clear cover over the reinforcing is 2 inches. Does anyone have any idea why this is occurring and how to prevent it?
