Vegetated Roof

Precast Concrete is a Highlight of new Stadium
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Precast Concrete is a Highlight of new Stadium

Precast Producer Clark Pacific manufactured 40 million pounds of precast concrete... More

Rooftop Results
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Rooftop Results

Producers can extend their markets by looking upward. More

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ASTM to Develop Green Roof Guide

A proposed new ASTM International standard, WK14283, "Guide for Green Roof Systems," will identify terminology, principles, and concepts for building vegetated green roof systems. More

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Defining Transportation Unit

How long must concrete be protected from freezing temperatures, with and without accelerators or admixtures? ASTM’s ready-mixed concrete specification says, “air content of air-entrained concrete when sampled from the transportation unit at the point of discharge” is to be within 1.5% of the specified value. What does the “transportation unit” mean? Is ASTM referring to the mixer truck, end of pump line, conveyor, etc. as the transportation unit? More

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