Concrete Strength

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A Quick Cure for Problem Soils

Surprise soils can complicate any project. When the excavation turns up weak or expansive clay, this low-strength ready-mix fill can provide a stable base for the foundation without busting the budget. More

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Products

Patch kit for oversized receptacle holes, new anti-scald shower valve, terrazzo tiles, premixed structural-anchor cement, comfortable safety harness, drywall crack repair mesh More

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Notebook

Harvard remodeling report analyzed, up-to-the-minute satellite weather for contractors, buildings damaged by swelling coal ash, questions about masonry wall strength, older U.S. homes too leaky, skid-steer accidents, California demands lower-VOC paint More

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JLC Online

Slab waterproofing admixture, carpenter pay rates More

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Notebook

Coping with the labor shortage, water heater failures, higher fly ash content in concrete, new home ventilation standard More

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Q&A: Concrete Cold Joints

Q: Occasionally my foundation contractor is not able to pour all of the concrete for a foundation at once, leaving vertical and horizontal cold joints. How do you prep the surface of the concrete after the first pour to make sure such joints are structurally sound? More

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Products

Tools for cutting steel studs, specialized wire stripper, filter fabric that slows root growth, new steel shingle, safety harness for women, fabric form for concrete footings More

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Choosing Concrete Anchors

There’s a concrete anchor for every task, from light-duty applications to heavy... More

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Q&A: Strength of Concrete Mix

Q: Many years ago, a concrete contractor gave me a recipe for mixing concrete by hand or machine. It is the only mix I have ever used. Is there any way to know how strong the mix is? I use 1 part Portland cement, 2 parts clean sand, and 3 parts clean crushed stone (7/16 inch or 3/4 inch, depending on the job). More

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Q&A: Strength of Header Hangers

Q: How do header hangers compare, from a strength standpoint, with traditional... More

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