MS Highway Practice Questions - Mississippi Highway Contractor Examination Exam

What is the primary purpose of a tack coat before placing a new HMA lift on an existing asphalt or concrete surface?

To waterproof the embankment subgrade To bond the new lift to the existing surface so the layers act together To replace rolling and density control on the new mat To cool the existing pavement before the paver arrives

Correct Answer:

To bond the new lift to the existing surface so the layers act together

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