VFA from VMA and Air Voids
EasyasphaltVFA
A mixture has VMA = 14% and air voids = 4%. The voids filled with asphalt (VFA) is most nearly:
- A28.6%
- B71.4%
- C50.0%
- D85.7%
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Answer: B. 71.4%
VFA = (VMA − Va)/VMA × 100 = (14 − 4)/14 × 100 = 71.4%. Using Va/VMA gives 28.6%, which is the unfilled share.
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