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Aggregate

“Aggregate” is a collective term for the mineral materials such as sand, gravel and crushed stone that are used with a binding medium (such as water, bitumen, portland cement, lime, etc.) to form compound materials (such as asphalt concrete and portland cement concrete). By volume, aggregate generally accounts for 92 to 96 percent of HMA … Read more »

 

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Backhoe used to place and initially grade spots

In designing and building pavements, we sometimes casually assume that making a pavement thicker also makes it stronger, but even to the extent this is true, how thick is thick enough? One of the key questions in the structural design of an asphalt pavement is how thick each layer of the structure should be. During … Read more »

IMG_3674

On any road construction project, there will be one or more inspectors assigned to check that work is being done to specifications, collect material samples if needed, and monitor progress. But what are inspectors looking for, exactly? It’s not intended to be a mystery; their focus is on making sure that the road is built … Read more »