SC Asphalt Paving Practice Questions - South Carolina Asphalt Paving Contractor Examination Exam

On a SCDOT project, what is the difference between a prime coat and a tack coat?

Prime is applied to unbound bases such as sand-clay, coquina, or graded aggregate; tack is applied to existing pavement or unsealed surface treatment to bond the next HMA layer Both terms mean the same application of CRS-2P chip-seal binder Tack is only used under concrete pavement Prime is applied between two HMA layers; tack is applied on unbound base

Correct Answer:

Prime is applied to unbound bases such as sand-clay, coquina, or graded aggregate; tack is applied to existing pavement or unsealed surface treatment to bond the next HMA layer

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