Title:
Concrete Q & A: Sampling Location for Pumped Concrete
Author(s):
Kevin MacDonald
Publication:
Concrete International
Volume:
30
Issue:
6
Appears on pages(s):
79-80
Keywords:
DOI:
Date:
6/1/2008
Abstract:
When a contractor decides to place concrete using a pump, should the field tests be performed on samples taken at the point of placement (after the concrete has run through the pump) or on samples taken at the point of delivery? I’m concerned that pumping the concrete may change its properties, such as slump and air content, but the concrete producer believes he is only responsible for delivering concrete that meets the specifications at the point of delivery.