WOODSIDE – Coming down to the wire, Graniterock’s Construction Division just wrapped up one of its larger paving projects in recent years.
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A“tender” asphalt mix usually refers to a mix that is difficult to compact. It may have a tendency to shove under the roller wheels and/ or leave longitudinal cracks at the edge of the steel drums. Either a lack of friction between particles or a lack of shear strength in  the mix essentially causes tenderness. Both these problems can be the result of many factors, the most common of which we will discuss. 
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A tender or slow-setting asphalt pavement is defined as one that scuffs under horizontally applied shearing loads after compaction has been completed, such as when power steering turns are made by a stationary vehicle. There are several causes of “tender pavements” including a faulty mix design, low compaction, and liquid asphalt saturation. Although each of these causes contributes to tender pavement, the most common root cause of a tender asphalt pavement is premature application of a preventive maintenance surface treatment (i.e. sealcoat, slurry seal, chip seal).
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