Learn about two ways to measure the strength of in-place concrete.
Concrete has both compressive and tensile strength.
Air content of concrete is usually tested with a pressure meter.
Testing compressive strength of concrete by casting cylinders and flexual strength using beams.
Several tests are done on fresh concrete to check its properties.
Contractors are not always responsible for puddles on concrete balconies.
Concrete test cylinders don't always reflect the strength of the concrete in a structure, especially during cold weather.
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Does high fly ash concrete provide the same passivating protection as portland cement?
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What causes popouts? Popouts on a concrete surface are from absorbant aggregates that freeze and expand.
In his third installment in this testing series, Hover discusses what to do with properly sampled concrete test results.
We placed, colored, and stamped the concrete in the photo two years ago. It looked great after the first winter, but then during the second winter, the surface started breaking down. We specified only 3% entrained air in the concrete because I was told not to use too much air or else the concrete...
From CC’s LinkedIn discussion group comes this question: Does anyone have another option to remove mass concrete foundations without using an excavator and breaker?
Under resilient floors, what is less likely to telegraph joints after moisture equilibration: semirigid epoxy or polyurea?
Our cat frequently urinated on our basement concrete floor, which now has a strong urine smell. I’m in the process of getting the house ready for sale and have tried everything I can think of to remov
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Do you have any information on the long-term performance of polymer overlays?
We are using a concrete mix with 60% slag in architectural concrete and are having significant issues with the color of the concrete. What can we do to avoid this?
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How do I know when to use hot weather concreteing techniques?
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If we fog spray flatwork to help prevent shrinkage cracking, is there any danger of increasing the water-cement ratio at the surface and reducing the strength of the concrete?
We were placing a large concrete patio that was to have an exposed-aggregate finish. After placing and bullfloating the slab, we spread a layer of decorative aggregate across the surface, pressed it down so it was completely embedded in the concrete, then hand-floated the entire surface, slightly...
What is the nominal weight of a standard concrete mixture?