Several tests are done on fresh concrete to check its properties.
Model 300 custom-designed air-entrainment machine ensures ready-mix and precast producers achieve required air content every time, at little to no added expense.
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...
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Besides changing the color, does adding pigment to concrete have any other effects on its properties that a contractor should be aware of?
When self-consolidating concrete (SCC), first billed as self-compacting concrete, was developed several years ago some thought it would quickly take a significant share of the concrete market and there were many claims made about its properties and what it could do.
Concrete countertops can be impressive without being a burden for contractors.
CR-FAST fast-setting crack repair and void filler can be ground after 30 minutes, greatly improving the time required to make repairs.
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What causes spalling in concrete parking lots?
One and a half years into the two-year curling field study on warehouse floors, the results have been unexpected.
Air-entraining admixtures are the most problematic of all admixtures for manufacturers, ready-mix producers, and concrete contractors.
ProSpec Moisture Vapor Reducer lowers the moisture vapor transmission rate of a concrete substrate by up to 80%.
Based on polyolefin resin/chemical technology, Perminator underslab vapor barrier helps reduce the penetration of moisture and water vapor through the slab.
Completely seal a building enclosure with the easy-to-apply Blueskin VP, a fully integrated, self-adhered, vapor permeable air and water barrier membrane.
Designed for underslab use to prevent moisture migration, Viper VaporCheck II acts as a barrier and retarder.
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I know that entrained air improves concrete's resistance to freeze/thaw damage, but why would air-entrained concrete be required in an area where freeze/thaw isn't an issue?
Air & Vapor Barrier 1800 provides a seamless and continuous membrane around the building envelope.
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Air—who would think something so visible, whose composition is so invisible, pervades our universe so completely, and has such omnipresence and power, can be both so useful and so harmful?
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My brother has a large driveway and parking area in front of his house in eastern Washington state. The concrete surface is spalling, possibly from overuse of deicers. The concrete is a minimum of 6 inches thick with rebar. The concrete is structurally
The Underhood150 belt-driven air-compressor system provides enough air power to supply two concrete breakers simultaneously.
Two compressor/generator combination models provide portable air and power in one machine.