Asphalt core cutting

Asphalt and concrete coring is a process where representative samples from an existing pavement, slab or structure is extracted for analysis. ... During the coring process, some water is sprayed into the coring location to keep the diamond tipped blade cool as the sample is extracted.
Asphalt Coring is typically required on road widening projects where knowing the thickness of the existing paving is required. Asphalt coring is also performed on a forensic basis to assist in the engineering analysis of pavement failures.
Also core required for compaction test.

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Asphalt core cutting 5cm thickness for cycle track