Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue
Patent
1988-07-14
1992-05-19
Yarbrough, Amelia Burgess
Compositions: coating or plastic
Coating or plastic compositions
Bituminous material or tarry residue
106277, 2523115, C08L 9500
Patent
active
051144832
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.
REFERENCES:
patent: 4373961 (1983-02-01), Stone
patent: 4523957 (1985-06-01), Graf
patent: 4762565 (1988-08-01), Graf
Burgess Yarbrough Amelia
Chevron Research and Technology Company
DeYoung J. J.
Gaffney R. C.
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