Water-Cement Ratio

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Ordering Ready-Mix Concrete

There’s more to concrete than water, cement, sand, and stone. An experienced batch plant manager talks about the admixtures that help you match the mix to the job. 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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Tips and Techniques From JLC-LIVE!

Working contractors and industry experts alike conducted seminars at this year’s Construction Business & Technology Conference. Here’s a sampling of the practical advice they shared with attendees. More

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Sub-slab Vapor Barriers

A slab poured directly on top of a vapor barrier dries more quickly on top than on the bottom, causing cracking and curling in the concrete. Here’s one way to solve the problem. More

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Curing Concrete

Contractors often have to pour concrete in less than ideal weather. An engineer tells you how to ensure good results even under poor conditions. More

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Shotcrete Primer

Sprayed concrete is not just for swimming pools. A concrete contractor brings us up-to-date on gunite and shotcrete technology. More

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Letters
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Restoration Primer: Patching Brownstone
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