EP0624214A1 - A method of preparing an emulsion- or asphalt-concrete for use as a road material - Google Patents
A method of preparing an emulsion- or asphalt-concrete for use as a road materialInfo
- Publication number
- EP0624214A1 EP0624214A1 EP92922931A EP92922931A EP0624214A1 EP 0624214 A1 EP0624214 A1 EP 0624214A1 EP 92922931 A EP92922931 A EP 92922931A EP 92922931 A EP92922931 A EP 92922931A EP 0624214 A1 EP0624214 A1 EP 0624214A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bitumen
- emulsion
- fraction
- binding agent
- stone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
Definitions
- asphalt-concrete for use as a road material.
- the present invention relates to a method of preparing an emulsion- or asphalt-concrete for use as a road material.
- the technique is based on the use of a bitumen emulsion in admixture with a graded stone material.
- An aqueous bitumen emulsion has no particular bonding ability of its own, but in time a so-called 'breaking' of the emulsion occurs, whereby the emulgated bitumen fractions float together and the water is segregated, such that the bitumen may thereafter act as a binding agent that can stick to the stone surfaces and bond these together.
- By means of different additives it is possible to control rather accurately when this breaking should take place after the mixing operation. It is achievable, therefore, that the mixture can be prepared and transported to the laying area and be laid-out therein prior to the breaking having proceeded to the point where the material will not thereafter be suitably easily shapeable.
- bitumenous binding agent It is the purpose of the invention to provide a method, by which it will be practically possible to make use of an emulsion based on a noticeably harder bitumen i.e. a bitumen of higher viscosity, such that the laid out road layer can exhibit a considerably increased strength and yet be suitably shapeable in connection with the laying-out, without thereafter being sensible to any washing out of the bitumenous binding agent.
- the invention is based on the consideration that the material as a whole will be supple and shapeable as long as the fine stone fraction has not been bonded by a high viscid bitumen, whether or not the stones in the coarse fraction have already been wrapped by a more or less broken emulsion based on a high viscid bitumen.
- the finally admixed emulsion will make the entire mixture supple and formable, i.e. the mixture can be laid out evenly and with ordinary equipment, although the stones of the coarse fraction have already been coated with a layer of broken, hard bonding bitumen.
- the coarse stone fraction is heated to such a high temperature, by which the stones can be totally coated by the initially added high viscid bitumen, which, itself, is heated to assume a viscosity suitably low for this purpose.
- the fine fraction is added to the mixer, in either cold or warm condition all according to the applied low viscid bitumen, which is also added; this bitumen should have a temperature high enough to condition such a low viscosity that the bitumen can effectively coat the stone particles of the fine fraction.
- this temperature should be somewhat lower than the
- this bitumen may have a viscosity e.g. in the range of 5000 - 75000 mm 2 /sec at 60° C.
- the viscosity of the relevant bitumen should normally be somewhat lower that 3000 mm 2 /sec, but under special circumstances this figure may be higher, e.g. up to 4-5000, though still noticeably smaller than the viscosity figure of the applied high viscid bitumen.
- the weight ratio between the two kinds of bitumen may vary all according to the dispensary og the material mixture, but a typical ratio can be 60%PC% high viscid and 40%ZC% low viscid bitumen.
- a typical ratio can be 60%PC% high viscid and 40%ZC% low viscid bitumen.
- the applied mixing plant can be a simple batch mixer or a continuous throughflow mixer, but it would be possible to use separate mixers for the mixing of the respective binding agents into the respective stone fractions and a separate mixer for the bringing together of the thus pretreated fractions.
- the hard emulsion can be dosed in accordance with the desired maximum carrying capacity of the stones of the coarse fraction, while a dilution of the emulsion would cause a weakening of this carrying capacity and thereby of the possibility of an efficient exploitation of the high viscid bitumen.
- finishing and delivering of the material mixture from the mixing plant in order to thereby counteracing later problems with respect to washing out of the emulsion after the laying out of the material or already during the transportation thereof to the working place. It is less important whether the soft emulsion is added briefly before, concurrently with, or briefly after the addition of the fine stone fraction.
- bitumenous binding agent having a quite low viscosity, e.g MB 1500-2000 at 60° C.
- This additive may be adminestered in cold condition. and it will render the material well shapeable. In so fas as the migration with the high viscid bitumen will take place soon after the laying out, a desirable result will be achievable also in this manner, even when the resulting bitumen percentage of the material may be still higher by the use of the 'soft' emulsion for the fine stone fraction.
- Stone material 60 weight percent of 4-16 mm coarse fraction
- Binding agent emulsion Type 1: BE65R/20.000
- Type 2 BE65M/3.000.
- BE stands for "bitumen emulsion”
- 65 for the admixtury percentage of the bitumen
- R for a rapidly breaking emulsion
- M for a medium breaking emulsion
- the breaking time for the emulsion type 1 on the coarse fraction type of stones is a certain amount of seconds, e.g. 12-14 seconds.
- the coarse fraction is introduced currently and without heating, into a flow-through mixer, at the
- the emulsion of the said type 1 is added by a flow corresponding to a weight amount of 7-8 %PC% of the stone weight.
- the aqueous solution of the emulsion will be distributed evenly around the stones in few seconds.
- a flow of the fine stone fraction and emulsion type 2 at a weight ratio of some 100:8 is added.
- the total product is conveyed further in the mixer for intensive mixing through additional 20-30 seconds, corresponding approximately to the breaking time of the emulsion type 2, whereafter the mixture is let out in a flow to a carrier truck.
- the truck takes the collected material portion to a delivery apparatus at the working site, where the laying out is effected not later than 4-5 hours after the preparation of the material mixture.
- the laid out emulsion concrete there will be a residual bitumen percentage of
- Stone material 60 weight percent of 5-18 mm coarse fraction
- Binding agent Type 1: B 180
- Type 2 MB 3.000
- the fine fraction is added, this fraction not having to be heated, and also 60 kg binding agent type 2, heated to roughly 90° C.
- the mixture portion of about 3 tons has been homogenously mixed, e.g. after 25 seconds, the charge is let out to carrier truck, and care is taken that the mixture is laid out not more than 5-6 hours after its preparation.
- the delivery temperature in the mixer can be some 60° C.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
- Colloid Chemistry (AREA)
- Cosmetics (AREA)
- Tires In General (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK1793/91 | 1991-10-30 | ||
DK911793A DK179391D0 (en) | 1991-10-30 | 1991-10-30 | PROCEDURE FOR MANUFACTURING EMULSION CONCRETE |
DK179391 | 1991-10-30 | ||
PCT/DK1992/000315 WO1993009295A1 (en) | 1991-10-30 | 1992-10-30 | A method of preparing an emulsion- or asphalt-concrete for use as a road material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0624214A1 true EP0624214A1 (en) | 1994-11-17 |
EP0624214B1 EP0624214B1 (en) | 1999-01-27 |
Family
ID=8108092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92922931A Expired - Lifetime EP0624214B1 (en) | 1991-10-30 | 1992-10-30 | A method of preparing an emulsion- or asphalt-concrete for use as a road material |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0624214B1 (en) |
AT (1) | ATE176286T1 (en) |
AU (1) | AU2902692A (en) |
CA (1) | CA2122497A1 (en) |
DE (1) | DE69228321T2 (en) |
DK (2) | DK179391D0 (en) |
ES (1) | ES2129459T3 (en) |
FI (1) | FI941957A0 (en) |
GR (1) | GR3030054T3 (en) |
NO (1) | NO305567B1 (en) |
WO (1) | WO1993009295A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2695664B1 (en) * | 1992-09-14 | 1994-10-14 | Ceca Sa | Process for the preparation of storable cold asphalt mixes which can be stored and corresponding bituminous emulsion. |
DK60095A (en) * | 1995-05-24 | 1996-11-25 | Vejtek Int As | Process for cold production of asphalt materials for cold laying of the same |
FR2743095B1 (en) * | 1995-12-28 | 1998-03-20 | Colas Sa | PROCESS FOR COLD BITUMINOUS DENSITY COATINGS AND DEVICE FOR CARRYING OUT SAID METHOD |
DE202010017924U1 (en) * | 2010-12-06 | 2013-03-26 | Joachim Eberhardt | For asphalt installation suitable asphalt building material |
NO339255B1 (en) * | 2013-05-22 | 2016-11-21 | Multivector As | Apparatus for swirling at least one fragmented substance |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB334588A (en) * | 1929-06-06 | 1930-09-08 | Edwin Corby Wallace | Improvements relating to bituminous paving compositions and methods of making same |
US4579458A (en) * | 1981-08-25 | 1986-04-01 | Ohlson Karl G | Method and apparatus for the production of asphalt concrete |
NO157510C (en) * | 1985-11-29 | 1988-03-30 | Nodest Vei As | PROCEDURE AND APPARATUS FOR MIXING GRAND MATERIALS AND THE BITUM. |
FR2623219B1 (en) * | 1987-11-17 | 1990-04-06 | Maheas Rene | METHOD FOR COLD MANUFACTURING STOCKABLE BITUMINOUS DENSITY COATINGS |
EP0491107B1 (en) * | 1990-12-19 | 1994-11-23 | Aktiebolaget Nynäs Petroleum | Two-component composition comprising a bitumen emulsion and a breaking additive, process for its preparation and the use of said two-component composition. |
-
1991
- 1991-10-30 DK DK911793A patent/DK179391D0/en not_active Application Discontinuation
-
1992
- 1992-10-30 DE DE69228321T patent/DE69228321T2/en not_active Expired - Fee Related
- 1992-10-30 DK DK92922931T patent/DK0624214T3/en active
- 1992-10-30 EP EP92922931A patent/EP0624214B1/en not_active Expired - Lifetime
- 1992-10-30 CA CA002122497A patent/CA2122497A1/en not_active Abandoned
- 1992-10-30 AT AT92922931T patent/ATE176286T1/en active
- 1992-10-30 ES ES92922931T patent/ES2129459T3/en not_active Expired - Lifetime
- 1992-10-30 WO PCT/DK1992/000315 patent/WO1993009295A1/en active IP Right Grant
- 1992-10-30 AU AU29026/92A patent/AU2902692A/en not_active Abandoned
-
1994
- 1994-04-27 NO NO941545A patent/NO305567B1/en not_active IP Right Cessation
- 1994-04-28 FI FI941957A patent/FI941957A0/en unknown
-
1999
- 1999-04-26 GR GR990401134T patent/GR3030054T3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9309295A1 * |
Also Published As
Publication number | Publication date |
---|---|
DK0624214T3 (en) | 1999-09-13 |
NO941545D0 (en) | 1994-04-27 |
ES2129459T3 (en) | 1999-06-16 |
DE69228321D1 (en) | 1999-03-11 |
NO305567B1 (en) | 1999-06-21 |
NO941545L (en) | 1994-04-27 |
AU2902692A (en) | 1993-06-07 |
DE69228321T2 (en) | 1999-09-23 |
FI941957A (en) | 1994-04-28 |
CA2122497A1 (en) | 1993-05-13 |
DK179391D0 (en) | 1991-10-30 |
ATE176286T1 (en) | 1999-02-15 |
EP0624214B1 (en) | 1999-01-27 |
GR3030054T3 (en) | 1999-07-30 |
WO1993009295A1 (en) | 1993-05-13 |
FI941957A0 (en) | 1994-04-28 |
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