Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue
Patent
1980-09-22
1982-07-13
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Bituminous material or tarry residue
C08L 9500
Patent
active
043392776
ABSTRACT:
An improved sulfur-extended asphalt composition and method for use in making compacted bituminous concrete, whereby solid sulfur, preferably in powdered form, is added to liquid asphalt on substantially a 1:1 weight basis, the asphalt comprising less than 3.1% of the weight of the total bituminous concrete mixture. The solid sulfur is melted by the heat present in the molten asphalt thereby lessening the overall energy consumption and eliminating the need for any liquid sulfur-related heating equipment. The overall binder content of the resultant bituminous concrete is varied so as to both maintain the 1:1 sulfur-replacement-of-asphalt relationship utilized with this invention, and to reduce the occurrence of air voids. Such a 1:1 replacement relationship provides economic efficiencies in bituminous concrete production not previously obtainable. The resultant sulfur-extended bituminous concrete when compacted provides substantially increased mechanical strengths over conventional asphalt mix designs. A solid sulfur mixing and blending apparatus is disclosed for use with asphalt batch plants to accommodate the present sulfur-extended asphalt composition and method.
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