CA1042610A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Reinforced sulphur-asphalt composites
Assignee: National Research Council Canada
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Filing: 1975-10-15
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Granted: 1978-11-21
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Expires: 1995-10-15
Abstract
Abstract ABSTRACT A sulphur-bituminous composite material consisting essentially of 60-75% by weight sulphur and 25-40% by weight bituminous material, and optionally containing a small amount of a fibrous or flake reinforcing material and usually with a filler which is suitable for use as a self-compacting road or pothole repair material. A feature of the composite is the presence of two continuous phases in the composite which is achieved either by mixing solid particulate sulphur with a softened bituminous material at a temperature in the range 120-150°C or by mixing liquid sulphur with liquid bituminous material with a sufficient shearing-mixing action to disperse the liquid sulphur as an emulsion with the bituminous material 80 as to provide on cooling a continuous, rigid, crystalline and porous sulphur skeleton in the composite.
Inventors
- 👤 James J. Beaudoin
- 👤 Peter J. Sereda
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 11:47
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
32 words
A sulphur-bituminous composite material consisting essentially of 60-75% by weight sulphur, 25-40% by weight bituminous material, wherein said sulfur and said bituminous material are interspersed throughout said composite as two continuous phases.
Claim 2
Dependent Claim
32 words
A sulphur-bituminous composite material consisting essentially of 60-75% by weight sulphur, 25-40% by weight bituminous material, wherein said sulfur and said bituminous material are interspersed throughout said composite as two continuous phases.
Claim 3
Dependent Claim
29 words
A composite material as claimed in claim 1 wherein said bituminous material is selected from asphalt, tar and pitch having a softening point range between about 100°C and 200°C.
Claim 4
Dependent Claim
29 words
A composite material as claimed in claim 1 including up to about 20% by weight of a filler material having a particle size in the range -3/8" +325 mesh.
Claim 5
Dependent Claim
27 words
A composite material as claimed in claim 1 wherein said reinfor-ing material is selected from the group comprising mica, fibrous organic materials, asbestos, glass-fibre and mixtures thereof.
Claim 6
Dependent Claim
23 words
A composite material as claimed in claim 4 wherein said reinfor-ing material is mica having an aspect ratio of about 50 to 200.
Claim 7
Dependent Claim
23 words
A composite material as claimed in claim 4 wherein said fibrous organic material is selected from the group comprising polyester, poly-propylene and polyamides.
Claim 8
Dependent Claim
20 words
A composite as claimed in claim 6 wherein said fibrous organic materials have an aspect ratio of 100 to 200.
Claim 9
Dependent Claim
26 words
A composite as claimed in claims 1, 2 or 3 wherein said continuous sulphur phase is a microporous phase having a pore size range of 5-15µ.
Claim 10
Independent Claim
72 words
A method for producing a sulphur-bituminous composite material wherein salt sulphur ant said bituminous material are interspersed through-out said composite as two continuous phases, which comprises mixing 60-75% by weight of finely divided solid particles of sulphur with 25-40% by weight of said bituminous material at a temperature in the range 120°C-150°C and cooling the resultant composite material, thereby producing a microporous continuous crystalline sulphur phase in a continuous viscoelastic bituminous phase.
Claim 11
Independent Claim
72 words
A method for producing a sulphur-bituminous composite material wherein salt sulphur ant said bituminous material are interspersed through-out said composite as two continuous phases, which comprises mixing 60-75% by weight of finely divided solid particles of sulphur with 25-40% by weight of said bituminous material at a temperature in the range 120°C-150°C and cooling the resultant composite material, thereby producing a microporous continuous crystalline sulphur phase in a continuous viscoelastic bituminous phase.
Claim 12
Dependent Claim
39 words
A method as claimed in claim 9 including mixing up to about 5% by volume of a reinforcing material having an aspect ratio in the range 50 to 200 with said finely divided sulphur particles and said bituminous material.
Claim 13
Dependent Claim
24 words
A method as claimed in claim 9 or 10 wherein said finely divided sulphur particles have a particle size not much greater than 5µm.
Claim 14
Dependent Claim
47 words
A method as claimed in claim 9 or 10 including mixing up to about 20% by weight of a filler material having a size range between -200 and +325 mesh, with said finely divided particles of sulphur and said bituminous material. CLAIMS SUPPORTED BY THE SUPPLEMENTARY DISCLOSURE
Claim 15
Independent Claim
85 words
A method for producing a sulfur-bituminous composite material wherein said sulfur and said bituminous material are interspersed through-out said composite as two continuous phases, which comprises mixing 60 -75% by weight of sulfur with 25-40% by weight of said bituminous material at a temperature in the range 120-150°C in such a manner that said sulfur is dispersed throughout the mixture in a finely divided form and cooling the resultant composite material, thereby producing a microporous continu-ous crystalline sulfur phase in a continuous viscoelastic bituminous phase.
Claim 16
Independent Claim
85 words
A method for producing a sulfur-bituminous composite material wherein said sulfur and said bituminous material are interspersed through-out said composite as two continuous phases, which comprises mixing 60 -75% by weight of sulfur with 25-40% by weight of said bituminous material at a temperature in the range 120-150°C in such a manner that said sulfur is dispersed throughout the mixture in a finely divided form and cooling the resultant composite material, thereby producing a microporous continu-ous crystalline sulfur phase in a continuous viscoelastic bituminous phase.
Claim 17
Dependent Claim
20 words
A method as claimed in claim 13 wherein said sulfur is liquid sulfur at a temperature in the range 120-150°C.
Claim 18
Dependent Claim
29 words
A method as claimed in claim 14 wherein said mixing step is conducted with sufficient shear action to effect an emulsion of the liquid sulfur in the bituminous material.
Claim 19
Dependent Claim
18 words
A method as claimed in claim 15 wherein said mixing is conducted in a high speed shear mixer.
Claim 20
Dependent Claim
21 words
A method as claimed in claim 15 wherein said mixer is operated at a speed in the range of 4000-6000 rpm.
References Cited (Backward Citations)
No citation records indexed.
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