EP0925406A1 - Aggregate for road surfaces - Google Patents
Aggregate for road surfacesInfo
- Publication number
- EP0925406A1 EP0925406A1 EP97942802A EP97942802A EP0925406A1 EP 0925406 A1 EP0925406 A1 EP 0925406A1 EP 97942802 A EP97942802 A EP 97942802A EP 97942802 A EP97942802 A EP 97942802A EP 0925406 A1 EP0925406 A1 EP 0925406A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bitumen
- aggregate
- active ingredient
- grain size
- additive
- 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
- E01C11/00—Details of pavings
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
- E01C11/245—Methods or arrangements for preventing slipperiness or protecting against influences of the weather for preventing ice formation or for loosening ice, e.g. special additives to the paving material, resilient coatings
Definitions
- the invention relates to an aggregate for surfaces of traffic areas according to the preamble of claim 1 as well as a method for producing this aggregate and a method for its installation in a traffic area
- the main active ingredient used is salts such as NaCI.
- Such an additive which is added in the form of a filler, that is to say a very fine-grained material in a mixing plant, to the mix for a bitumen-bound top layer has proven successful.
- the active ingredient is mixed with a hydrophobicizing agent 29 621 A1 known.
- DE 42 30 545 C1 discloses a process for producing a synthetic salt-containing crushed sand or grit, which is also intended as an ice-forming-inhibiting additive for the construction of traffic areas. This material is formed by mixing a mortar mixture
- the surface layer of a road surface is usually several centimeters thick. In the course of the service life of the surface layer, only a small part of its layer thickness is worn away, so that only a small proportion of the aggregate mixed into the surface layer with an anti-icing effect has its intended effect Conversely, this means that the majority of this additive never reaches the area of the outer surface layer, ie is encapsulated and thus remains completely ineffective
- WO 94/23130 A basic possibility of remedying this unsatisfactory condition from an economic point of view is opened in WO 94/23130.
- This document describes a protective layer composed of a granular mineral component and a binding agent for the surfaces of traffic surfaces, the mineral component being a material that inhibits ice formation contains, which is at least partially in the form of a filler, that is to say very finely divided. Furthermore, the mineral component can be in the form of crushed sand and / or grit.
- the proportion of ice-inhibiting material in the mineral component should preferably be at least 30% by mass since protective layers which are hot, warm or cold can be applied in construction, have a much smaller layer thickness than a normal top layer, it is possible in this way to concentrate the substance that is effective in inhibiting ice formation on a much smaller volume fraction in the area near the surface than was previously the case. With regard to the size of the surface of a traffic area, considerable savings were made in the consumption of the active substance.
- the object of the invention is to propose a fine-grained aggregate with an ice formation-inhibiting effect for the construction of traffic areas, which is inexpensive to produce and easy to process, a concentration of this aggregate should be possible as close as possible to the surface area of the cover layer.
- the proportion of the substance effective for inhibiting ice formation should be as high as possible.
- a method for the production of this aggregate and a method for its installation in traffic areas are to be specified.
- the invention provides for the aggregate to be in the form of a fine-grained material with a maximum grain size of less than 0.5 mm.
- the aggregate preferably has at least 85% by weight of a grain size of less than 0.2 mm.
- An essential component of the individual grains is an ice formation inhibitor Active ingredient, preferably a salt such as NaCI, KCI or MgCI 2 , NaCI being particularly preferred because of the economically advantageous reference options (e.g. as a residual salt from another production).
- the active ingredient consists of pincer cores with a maximum pinion size of less than 0.2 mm, preferably less than 0. 09 mm, the surface is treated with bitumen, so that in particular the smallest Pnmarkornner agglomerate with each other to form larger secondary comers or are glued to larger Pnmarkorner More dusty
- bitumen treatment already protects the additive according to the invention against moisture absorption and an undesirably quick washout.
- the pnmark grains are treated before the treatment mixed with bitumen with a hydrophobing agent.
- the proportion of bitumen in the finished aggregate is usually in the range from 1 to 10% by mass, preferably in the range from 3 to 5% by mass.
- the ice-inhibiting W If the material is made of a bituminous material and bitumen, the aggregate may contain other components, such as limestone powder
- the aggregate according to the invention can be produced in a very simple manner.
- the finely divided active ingredient, preferably ground hydrophobized NaCl, and the optionally desired further components which have a particle size of less than 0.2 mm, preferably less than 0.09 mm. are placed in a compulsory mixer (e.g. ploughshare mixer).
- a compulsory mixer e.g. ploughshare mixer
- bitumen can be added in a single step or in several batches in succession If the bitumen is added in the form of an emulsion, mixing can be done cold, i.e. at ambient temperature.
- bitumen is used as a binder
- the walls of the mixer are heated in order to adhere the To avoid the mixture, and the bitumen is added at a temperature in the range of about 180-250 ° C, preferably 220-230 ° C.
- the bitumen is added at a temperature in the range of about 180-250 ° C, preferably 220-230 ° C.
- the bitumen By adding the bitumen, the smallest pnmark grains of the mixture agglomerate with one another or stick together with larger p ⁇ markornem and form on them Larger secondary grains, which means that the fine fraction with a ma ximal grain size below 0.003 mm practically completely bound
- the mixing is carried out at least until the bitumen is evenly distributed in the mixture, and is ended before the agglomerates that form exceed a secondary grain size of 0.5 mm, preferably 0 3 mm
- the mixture produced is removed from the mixer and filled into transport containers for further processing in traffic flat construction.
- the product produced in this way
- bitumen when using hot bitumen as a binder, the mixture does not even need to be cooled to a low temperature before it can be packaged, since it surprisingly remains nebulizable even when warm.
- the bitumen is added when hot
- the amount of bitumen is preferably set in the range of 3-5% by mass.
- the mixing time can generally be limited to a period of 1.5-8 minutes, preferably 3-5 minutes. If, under unfavorable conditions, small amounts of undesirably large secondary particles have formed, these can be sieved if necessary. This does not usually occur
- the processing of the aggregate according to the invention can be carried out in different ways. It is recommended that the aggregate in the quantity desired in each case, preferably
- the traffic area is then rolled over, so that the aggregate is also stored to a certain depth in the top layer covering.
- the use of the material according to the invention is in principle possible in the new building n Traffic surfaces as well as surface treatment by applying protective layers, both for hot installation and cold installation
- the surfaces of the traffic surfaces produced in this way have an excellent anti-icing effect over very long periods of time. Compared to the processing of conventional anti-icing additives, the invention results in considerable material savings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Repair (AREA)
- Disintegrating Or Milling (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Signs Or Road Markings (AREA)
- Traffic Control Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19638743A DE19638743C2 (en) | 1996-09-10 | 1996-09-10 | Granular material, its manufacture and use |
DE19638743 | 1996-09-10 | ||
PCT/DE1997/001972 WO1998011301A1 (en) | 1996-09-10 | 1997-09-04 | Aggregate for road surfaces |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0925406A1 true EP0925406A1 (en) | 1999-06-30 |
EP0925406B1 EP0925406B1 (en) | 2001-07-04 |
Family
ID=7806449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97942802A Expired - Lifetime EP0925406B1 (en) | 1996-09-10 | 1997-09-04 | Aggregate for road surfaces |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0925406B1 (en) |
AT (1) | ATE202813T1 (en) |
AU (1) | AU4450897A (en) |
CZ (1) | CZ81299A3 (en) |
DE (2) | DE19638743C2 (en) |
PL (1) | PL332090A1 (en) |
WO (1) | WO1998011301A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10117437A1 (en) * | 2001-04-03 | 2002-10-17 | Wilhelm Kaemereit | Process for preventing winter slippage on traffic areas and bitumen emulsion |
US7465360B2 (en) * | 2005-05-02 | 2008-12-16 | Southwest Research Institute | Methods for removing a dispersed lubricious coating from a substrate |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3404271A1 (en) * | 1984-02-03 | 1985-08-08 | Mannesmann AG, 4000 Düsseldorf | FINE GRAIN BLEND |
DE3808250A1 (en) * | 1988-03-12 | 1989-09-21 | Veba Oel Ag | ROAD FURNISHING FROM AN ASPHALT MIXTURE WITH A COMPRESSIVE COMPOUND |
NO176812C (en) * | 1989-10-13 | 1995-05-31 | Mannesmann Ag | Process for the preparation of a fine grain composition showing hydrophobic properties |
CS113591A3 (en) * | 1991-04-22 | 1992-11-18 | Pavol Ing Kovac | Antifreeze ingredient into bituminous wearing courses of roads andpavements |
DE4129621A1 (en) * | 1991-09-06 | 1993-03-11 | Gruenau Gmbh Chem Fab | POWDER-SHAPED HYDROPHOBIC FILLER FOR BITUMEN-BINDING TRAFFIC AREAS |
DE4230545C1 (en) * | 1992-09-09 | 1994-03-24 | Mannesmann Ag | Process for producing a synthetic salty crushed sand and / or grit |
WO1994023130A1 (en) * | 1993-04-01 | 1994-10-13 | Mannesmann Ag | Protective layer for the surface of traffic areas and process for applying a protective layer |
-
1996
- 1996-09-10 DE DE19638743A patent/DE19638743C2/en not_active Expired - Fee Related
-
1997
- 1997-09-04 AU AU44508/97A patent/AU4450897A/en not_active Abandoned
- 1997-09-04 EP EP97942802A patent/EP0925406B1/en not_active Expired - Lifetime
- 1997-09-04 PL PL97332090A patent/PL332090A1/en unknown
- 1997-09-04 AT AT97942802T patent/ATE202813T1/en not_active IP Right Cessation
- 1997-09-04 CZ CZ99812A patent/CZ81299A3/en unknown
- 1997-09-04 DE DE59703969T patent/DE59703969D1/en not_active Expired - Fee Related
- 1997-09-04 WO PCT/DE1997/001972 patent/WO1998011301A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9811301A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0925406B1 (en) | 2001-07-04 |
PL332090A1 (en) | 1999-08-30 |
DE19638743A1 (en) | 1998-03-12 |
DE59703969D1 (en) | 2001-08-09 |
AU4450897A (en) | 1998-04-02 |
ATE202813T1 (en) | 2001-07-15 |
DE19638743C2 (en) | 1998-11-26 |
CZ81299A3 (en) | 1999-07-14 |
WO1998011301A1 (en) | 1998-03-19 |
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