US3797951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wearing courses of stone and mastic on pavements
Assignee: Strabag Bau AG
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Filing: 1971-08-03
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Granted: 1974-03-19
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Expires: 1991-08-03
Abstract
Abstract A hot mixture of stone and mastic is applied to the road foundation and compacted. The quantity and fluidity of the mastic is such that during and after the compacting, the mastic flows into the interstices between the stones forming the wearing course as a layer of mastic substantially free of voids, in which the stones are embedded, and with stone protruding from the upper surface thereof.
Inventors
- 👤 G Zichner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:43
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/35; E01C7/353
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
192 words
Method of making wearing course on a roadway foundation resistant to lateral displacement in response to the stress of traffic, comprising: a. forming a uniform hot mixture consisting essentially of stones and mastic, the stones being more than 65 wt-%, the mastic being less than 35 wt-%, of the stone and mastic mixture, the stone being not less than about 2 mm, the mastic being at least 20 wt-% bitumen, the stone size being distributed within the range of 2-18 mm, b. applying the mixture at an elevated temperature as a covering layer over the foundation, and c. compacting the mixture to form the wearing course as a layer of mastic bonded to the foundation, substantially free of voids in which the stones covered with a film of mastic are embedded with stones protruding from the upper surface thereof, the quantIty and fluidity of the mastic and size distribution of the stone being such that during and after said compacting, the mastic flows into the interstices between the stones forming the wearing course as aforesaid and in which the volume of the mastic is less than the interstitial volume of the stones.
Claim 2
Dependent Claim
192 words
Method of making wearing course on a roadway foundation resistant to lateral displacement in response to the stress of traffic, comprising: a. forming a uniform hot mixture consisting essentially of stones and mastic, the stones being more than 65 wt-%, the mastic being less than 35 wt-%, of the stone and mastic mixture, the stone being not less than about 2 mm, the mastic being at least 20 wt-% bitumen, the stone size being distributed within the range of 2-18 mm, b. applying the mixture at an elevated temperature as a covering layer over the foundation, and c. compacting the mixture to form the wearing course as a layer of mastic bonded to the foundation, substantially free of voids in which the stones covered with a film of mastic are embedded with stones protruding from the upper surface thereof, the quantIty and fluidity of the mastic and size distribution of the stone being such that during and after said compacting, the mastic flows into the interstices between the stones forming the wearing course as aforesaid and in which the volume of the mastic is less than the interstitial volume of the stones.
Claim 3
Dependent Claim
10 words
Method according to claim 1, the stones being crushed stones.
Claim 4
Dependent Claim
22 words
Method according to claim 1, the stones being a distribution in one of the ranges 2-8 mm, 2-12 mm, and 2-18 mm.
Claim 5
Dependent Claim
22 words
Method according to claim 1, substantially all of the stones being a mixture of stone size distributions 2-5 mm and 5-8 mm.
Claim 6
Dependent Claim
30 words
Method according to claim 1, substantially all of the stones being a mixture of stone size distributions 2-5mm and 5-8 mm and 8-12 mm, or 5-8 mm and 8-12 mm.
Claim 7
Dependent Claim
43 words
Method according to claim 1, substantially all of the stones being a mixture of stone size distributions 2-5 mm and 5-8 mm and 8-12 mm and 12-18 mm, or 5-8 mm and 8-12 mm and 12-18 mm, or 8-12 mm and 12-18 mm.
Claim 8
Dependent Claim
20 words
Method according to claim 4, the wt-% of the stone size distributions increasing as the stone size distribution becomes coarser.
Claim 9
Dependent Claim
20 words
Method according to claim 5, the wt-% of the stone size distributions increasing as the stone size distribution becomes coarser.
Claim 10
Dependent Claim
20 words
Method according to claim 6, the wt-% of the stone size distributions increasing as the stone size distribution becomes coarser.
Claim 11
Dependent Claim
24 words
Method according to claim 1, and including in the hot mixture a stabilizing agent to prevent separation of the mixture before said application thereof.
Claim 12
Dependent Claim
103 words
A road comprising a foundation and a wearing course bonded to the foundation, the wearing course comprising a layer of mastic in which stones covered with a film of mastic are embedded, bonded to the foundation, substantially free of voids, stones protruding from the outwardly disposed surface of the wearing course, the stones being not less than about 2 mm and being more than 65 wt-% of the stone and mastic, the mastic being less than 35 wt-% of the stone and mastic layer, the mastic being at least 20 wt-% bitumen, the stone size being distributed within the range of 2-18 mm.
Claim 13
Dependent Claim
103 words
A road comprising a foundation and a wearing course bonded to the foundation, the wearing course comprising a layer of mastic in which stones covered with a film of mastic are embedded, bonded to the foundation, substantially free of voids, stones protruding from the outwardly disposed surface of the wearing course, the stones being not less than about 2 mm and being more than 65 wt-% of the stone and mastic, the mastic being less than 35 wt-% of the stone and mastic layer, the mastic being at least 20 wt-% bitumen, the stone size being distributed within the range of 2-18 mm.
Claim 14
Dependent Claim
129 words
A composition for production of a wearing course on a road foundation, spreadable to form a layer over the foundation which is compactable to form the wearing course as a layer of mastic in which stones covered with a film of mastic are embedded, bonded to the foundation, substantially free of voids, and with stones protruding from the outwardly disposed surface thereof, consisting essentially of a uniform hot mixture of stones and mastic in which the stones are not less than about 2 mm and are at least 65% by weight of the stone and mastic mixture, the mastic being less than 35 wt-% of the stone and mastic mixture, the mastic being at least 20 wt-% bitumen, the stone size being distributed within the range of 2-18 mm.
Claim 15
Dependent Claim
129 words
A composition for production of a wearing course on a road foundation, spreadable to form a layer over the foundation which is compactable to form the wearing course as a layer of mastic in which stones covered with a film of mastic are embedded, bonded to the foundation, substantially free of voids, and with stones protruding from the outwardly disposed surface thereof, consisting essentially of a uniform hot mixture of stones and mastic in which the stones are not less than about 2 mm and are at least 65% by weight of the stone and mastic mixture, the mastic being less than 35 wt-% of the stone and mastic mixture, the mastic being at least 20 wt-% bitumen, the stone size being distributed within the range of 2-18 mm.
Claim 16
Dependent Claim
27 words
Road according to claim 11, the stones being 70-75 wt. %, the mastic being 25-30 wt.%, of the stones plus mastic, the mastic being 23-28 wt-% bitumen.
Claim 17
Dependent Claim
39 words
Composition according to claim 12, the stones being 70-75 wt.%, the mastic being 25-35 wt.%, of the stones plus mastic, the mastic containing bitumen in an amount such that 23-28 of the percentage points of the mastic are bitumen.
Claim 18
Dependent Claim
20 words
Method according to claim 1, the stones being 65-80 wt.%, the mastic being 20-35 wt.%, of the stone plus mastic.
Claim 19
Dependent Claim
20 words
Method according to claim 1, the stones being 70-75 wt.%, the mastic being 25-30 wt.%, of the stone plus mastic.
Claim 20
Dependent Claim
15 words
Method according to claim 16, the mastic containing bitumen in an amount of 23-28 wt%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |