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Specific Gravity Tester determines the theoretical maximum specific gravity of bituminous mixtures in accordance to ASTM D2041 Standard Test Method for <br>Theoretical Maximum Specific Gravity of Bituminous Mixtures (Vacuum process). Adopted with single chip machine technology to shake a loose asphalt mixture <br>sample submerged in water. Vacuum is applied into the sample, to extract out the air bubble.
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