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This Alternate Top Section for the NCAT Asphalt Field Permeameter is a larger-diameter top-tier option to permit rapid filling for highly permeable mixes. It also allows extending test times for moderately permeable materials. This larger-diameter, single-tier top section can be used as an alternative to the top two sections of the APA-11B four-tiered NCAT Asphalt Field Permeater with the standard top tier.
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