Pouring an ICF Project Lessons Collapsed Slump

Collapsed Slump

The second possible result from a slump test is Collapsed Slump. Collapsed Slump is the opposite of Zero Slump. Why Zero Slump indicates a mix that is too dry, Collapsed Slump indicates that the water to cement ratio is too high and the mix is to wet. Pouring a concrete mix that is too wet will cause excessive pressure on the ICF forms and could cause bulging or a blowout.

Step 18: Collapsed Slump - This is an indication that the water to cement ratio is too high and the concrete mix is too wet.