Where to dump concrete before testing from truck
Where to dump concrete before testing from truck
(OP)
Where do you have the truck dump concrete before testing? Basically the truck needs to unload 10% before samples can be taken for testing. If they dump in the forms, and the concrete doesn't have the correct air/slump, you end up with out of spec concrete in place.






RE: Where to dump concrete before testing from truck
RE: Where to dump concrete before testing from truck
RE: Where to dump concrete before testing from truck
RE: Where to dump concrete before testing from truck
Although on the odd residential job I've received testing for there's always a tester's comment "Water was added after the tests were complete". Scary.
RE: Where to dump concrete before testing from truck
Maine Professional and Structural Engineer
American Concrete Industries
www.americanconcrete.com
RE: Where to dump concrete before testing from truck
RE: Where to dump concrete before testing from truck
These tests and the sampling are being performed for Quality Control/Quality Assurance compliance. There is a statistical expectation that the concrete delivered to the jobsite will comply with the specifications and, therefore, the testing is expected to be confirmatory. In that regard, there is no wasting of the concrete prior to testing. Further, the only "tests" that can be done at the jobsite on the wet concrete are slump and air content. While they might be specified and rejectable parameters, they are not directly indicative of the ultimate compressive strength, which is the common design parameter the structural engineer will be looking for, although the durability of the concrete (which can be related to both slump and air content) should also be considered.
RE: Where to dump concrete before testing from truck
RE: Where to dump concrete before testing from truck
Maine Professional and Structural Engineer
American Concrete Industries
www.americanconcrete.com
RE: Where to dump concrete before testing from truck
RE: Where to dump concrete before testing from truck