5 Things You Should Know About Making Concrete Testing Cylinders
February 1, 2017
From residential housing to multi-story buildings, Shield has performed concrete testing on hundreds of projects. On each project, the process of making concrete cylinders for future compression testing is critical to obtaining proper results. Here are five things to remember when making concrete testing cylinders.
1. Sampling the concrete
If concrete has not been thoroughly mixed, dried clumps of concrete may find their way into the forms, causing slump and air entrainment testing to be inaccurate. This will yield a weaker product than if the concrete was mixed correctly.
2. Measuring slump
If the slump measures too low, ensure that the concrete ticket has the amount of water withheld. This way, testing technicians can stipulate the maximum amount of water allowed to go back into the mix.
3. Consolidating the cylinders
After rodding the cylinders, consolidating the cylinders with an ample amount of force is necessary to ensure the cylinders do not have a “Swiss cheese” appearance when extruded from their casing. Fully-consolidated cylinders will break closer to their full potential than cylinders that have been weakly consolidated.
4. Handling the cylinders
Testers should be close enough to the pour location to keep an eye on any concrete being placed, yet far enough away to ensure that freshly-cast test cylinders do not have far to travel to their curing site and are not disturbed by construction personnel.
5. Transporting the cylinders
Concrete test cylinders should be secured while in transit. Minimizing the amount of impact during stop-and-go driving will help freshly cured concrete test cylinders break to their maximum potential strength.
Are you ready to make your concrete testing cylinders now? For more information about concrete testing cylinders and the process of making them, contact our team.