Open-graded asphalt
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United States of America Patent
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May 19, 1992
Issued Date -
N/A
app pub date -
Jul 14, 1988
filing date -
Oct 31, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A paving composition comprising about 80 to 97% by weight of an open-graded aggregate and about 3 to 20% asphalt, said composition being formed by successively mixing two asphalt-containing emulsions A and B with said aggretate wherein: emulsion A comprises about 40 to 75% by weight of a soft asphalt having a viscosity in the range of 50 to 1000 centistokes at 210.degree. F. and 0.05 to 5% by weight of a emulsifier, and water as a continuous phase of said emulsion to make up 100% by weight; and emulsion B comprises about 40 to 75% by weight of a hard asphalt having a penetration 5 to 25 dmm at 77.degree. F. and 0.05 to 5% by weight of a emulsifier, and water as a continuous phase of said emulsion to make up 100% by weight.
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