WO1996037557A1 - Verfahren zur herstellung eines zuschlagstoffs für den strassenbau - Google Patents
Verfahren zur herstellung eines zuschlagstoffs für den strassenbau Download PDFInfo
- Publication number
- WO1996037557A1 WO1996037557A1 PCT/DE1996/000774 DE9600774W WO9637557A1 WO 1996037557 A1 WO1996037557 A1 WO 1996037557A1 DE 9600774 W DE9600774 W DE 9600774W WO 9637557 A1 WO9637557 A1 WO 9637557A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carbonate
- carboxylic acid
- caking
- stage
- mixed
- Prior art date
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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/182—Aggregate or filler materials, except those according to E01C7/26
Definitions
- the invention relates to a method for producing an additive for road construction for lowering the freezing point according to the preamble of claim 1.
- Such an agent has the task of freezing surface water on traffic areas and the formation of hoarfrost at temperatures such. B. in the range of about - 2 to - 4 ° C.
- snow removal in winter is to be made easier by reducing the adhesion of the snow to the surface of the traffic area.
- An additive in the form of a powder-shaped hydrophobic filler for bitumen-bound traffic areas is known from DE 41 29 621 A1. This consists of 60 to 95% by weight of one or more substances which lower the freezing point of the water, as well as 0 to 39.9% by weight of rock powder and 0.1 to 10% by weight of one or more hydrophobicized amorphous silicon dioxide. It is a fine grain mixture with a grain size of less than 200 ⁇ m. Chlorides of the alkaline earth metals are particularly preferred as freezing point-lowering substances. This known means not only has good compatibility with the others for the production of bitumen-bound
- Phosphoric acid and organic carboxylic acid is reacted at elevated temperature in the range of about 1 10 to 150 ° C with constant stirring.
- the ratio of phosphoric acid to organic carboxylic acid should be in the range from 1: 1 to 1:10.
- the dry mixture is comminuted to a grain size of less than 0.2 mm, preferably less than 0.1 mm.
- a rock flour e.g. quartz flour, lava flour, pumice stone flour
- rock flour is then mixed into the intermediate product thus produced in a quantity ratio which is approximately in the range from 1: 1 to 1: 4 (rock flour to intermediate product).
- this mixture is mixed uniformly with a water repellent.
- Acetic acid is preferably used as the organic carboxylic acid.
- the aggregate produced in this way not only shows excellent effects with regard to the lowering of the freezing point, which, depending on the concentration, extends to a range of approximately -9 ° C., but is also completely environmentally compatible. In addition, this agent shows no adverse effects on corrosive stress
- the object of the invention is therefore to propose a method with which a generic aggregate for road construction can be produced, the production of which is possible with a significantly reduced outlay and which can nevertheless have the same positive effects.
- the invention is based on the knowledge that the comparatively high manufacturing costs of the known additive in the energy and plant expenditure for the implementation of the first process step, ie the implementation of the ones used Acids (phosphoric acid and organic carboxylic acid) with the comminuted starting material consisting of magnesium carbonate and calcium carbonate (Mg / Ca carbonate), preferably dolomite, can be seen.
- the quantities used to produce this additive can be varied within the following limits (% by weight):
- the invention now provides that the reaction is carried out at elevated temperature with only a portion of the Mg / Ca carbonate. It is recommended that an amount of at most 20%, preferably less than 10% and particularly preferably about 2 to 5%, in particular about 3% of the total amount be used for this
- Mg / Ca carbonate in the first stage of the process.
- This partial amount of Mg / Ca carbonate is mixed with the total phosphoric acid portion envisaged and with a portion of the carboxylic acid and reacted at elevated temperature, preferably with constant stirring. It is thereby achieved that the quantities of substance to be heated are limited to a small fraction of the quantities of substance previously used in the warm process stage. This drastically reduces the amount of energy required for heating, and there is also a corresponding reduction in the amount of equipment required (smaller container sizes compared to the production volume of the end product) and the operating effort for the required mixing during the implementation.
- the amount of Mg / Ca carbonate should at least correspond to the amount stoichiometrically required for the reaction with the acids.
- the proportion of the carboxylic acid to be used in the warm process stage can be varied approximately in the range from 20 to 80% of the total amount required.
- the amount of carboxylic acid to be introduced into the warm stage is preferably 40 to 60%, in particular 50% of the total amount.
- a dry intermediate product results from the first process stage, which is mixed in the second process stage with the remaining amount of carboxylic acid and with the remaining amount of Mg / Ca carbonate. This mixing takes place at about room temperature, i.e. without additional expenditure of thermal energy.
- the added amount of carboxylic acid reacts with a corresponding part of the Mg / Ca carbonate. This reaction ends when a neutral pH is reached.
- the intermediate product obtained from the second stage of the process with the desired proportion of rock flour, preferably limestone flour, and an anti-caking and
- Water repellents are mixed evenly. Since the hydrophobization of the intermediate product obtained from the second stage of the process is particularly important, it is advisable to mix it with the hydrophobizing agent at the end of the second stage of the process before or after reaching the neutral pH. This mixing must be carried out very intensively in a homogenization unit with additional mechanical action on the mix (e.g. in a pneumatic mixer with additional choppers). The requirements for mixing when adding the rock powder are lower.
- the rock powder used should, if possible, have a grain size that is clearly below 200 ⁇ m, preferably below 90 ⁇ m.
- the grain size is reduced to below 200 ⁇ m, preferably max., Before or during the mixing with the anti-caking and hydrophobizing agent. 90 ⁇ m.
- This also has the advantage that the reaction can proceed much faster in the warm stage of the process, since the reactive surfaces are considerably enlarged. This allows the required
- the anti-caking and waterproofing agent should have a grain size that is clearly below 90 ⁇ m. Are particularly suitable for the hydrophobization
- the proportion of the anti-caking and hydrophobizing agent in the end product is preferably in the range from 1 to 8% by weight and is dependent on the effectiveness of the hydrophobizing agent.
- acetic acid is preferred, other acids such as citric acid or formic acid can also be used in the process as organic carboxylic acids.
- the elevated temperature in the first stage of the process should expediently
- Range from 110 to 150 ° C can be selected.
- the required residence time of the material in the first stage of the process can generally be limited to a duration of 20 to 60 minutes, typically 30 to 40 minutes. It is influenced by the selected temperature and by the desired proportions of the starting materials.
- an intermediate product A was produced using the following quantitative proportions of starting materials (% by weight):
- the dolomite used had a granularity of less than 90 ⁇ m.
- the material was mixed intensively at a temperature of approx. 130 ° C. in a stirred container over a period of 90 min.
- 4% of the dry intermediate A produced in this way were placed in a second container and mixed with 93% dolomite of the same granularity and with 3% acetic acid. After 6 days, this dry fine-grained mixture (intermediate B) showed a neutral pH, i. H. the conversion of the acetic acid with the dolomite was complete.
- intermediate B 69% was mixed intensively in a pneumatic mixer with 26.5% fine-grained limestone powder (grain size below 90 ⁇ m) and 4.5% fine-grained anti-caking and hydrophobicizing agent, so that in the end a homogeneous hydrophobized. it resulted in a dry, fine-grained total mixture.
- This agent could easily be used in bitumen-bound or cement-bound mixtures for the production of top layers for Process traffic areas.
- the effects on freezing drop were excellent.
- values in the range of - 2 to - 9 ⁇ C could be achieved.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Architecture (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Road Paving Structures (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19680395T DE19680395D2 (de) | 1995-05-24 | 1996-04-26 | Verfahren zur Herstellung eines Zuschlagstoffs für den Strassenbau |
EP96914839A EP0828795A1 (de) | 1995-05-24 | 1996-04-26 | Verfahren zur herstellung eines zuschlagstoffs für den strassenbau |
AU56842/96A AU5684296A (en) | 1995-05-24 | 1996-04-26 | Process for producing an aggregate for road building |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519977.4 | 1995-05-24 | ||
DE1995119977 DE19519977C1 (de) | 1995-05-24 | 1995-05-24 | Verfahren zur Herstellung eines Zuschlagstoffs für den Straßenbau |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996037557A1 true WO1996037557A1 (de) | 1996-11-28 |
Family
ID=7763335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/000774 WO1996037557A1 (de) | 1995-05-24 | 1996-04-26 | Verfahren zur herstellung eines zuschlagstoffs für den strassenbau |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0828795A1 (de) |
AU (1) | AU5684296A (de) |
DE (2) | DE19519977C1 (de) |
WO (1) | WO1996037557A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007063778B3 (de) * | 2007-11-06 | 2014-07-31 | Refratechnik Holding Gmbh | Verfahren zur Herstellung feuerfester Leichtgranalien sowie nach dem Verfahren hergestellte Leichtgranalien |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2426200A1 (de) * | 1973-06-13 | 1975-02-13 | Plastiroute Sa | Mischgut zur herstellung eines eine eisbildung hemmenden und schnee tauenden strassenbelags und verfahren zur herstellung dieses mischgutes |
DE2919444A1 (de) * | 1979-05-15 | 1980-11-20 | Wibau Gmbh | Verfahren zur aufbereitung von giess- und/oder verdichtungsfaehigen asphaltbetonmassen fuer die herstellung von flaechigen belaegen, insbesondere strassendecken und estrichbelaegen in gebaeuden |
EP0153269A1 (de) * | 1984-02-03 | 1985-08-28 | MANNESMANN Aktiengesellschaft | Feinkorngemisch |
EP0332803A2 (de) * | 1988-03-12 | 1989-09-20 | Heinz Vonk | Strassenbelag aus einem Asphaltmischgut mit einer eishemmenden Komponente |
DE4129621A1 (de) * | 1991-09-06 | 1993-03-11 | Gruenau Gmbh Chem Fab | Pulverfoermiger hydrophober fueller fuer bitumengebundene verkehrsflaechen |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3934657C2 (de) * | 1989-10-13 | 1994-08-18 | Mannesmann Ag | Verfahren zur Herstellung eines nach außen hydrophobe Eigenschaften aufweisenden Feinkorngemisches |
-
1995
- 1995-05-24 DE DE1995119977 patent/DE19519977C1/de not_active Expired - Fee Related
-
1996
- 1996-04-26 AU AU56842/96A patent/AU5684296A/en not_active Abandoned
- 1996-04-26 WO PCT/DE1996/000774 patent/WO1996037557A1/de active Application Filing
- 1996-04-26 DE DE19680395T patent/DE19680395D2/de not_active Expired - Fee Related
- 1996-04-26 EP EP96914839A patent/EP0828795A1/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2426200A1 (de) * | 1973-06-13 | 1975-02-13 | Plastiroute Sa | Mischgut zur herstellung eines eine eisbildung hemmenden und schnee tauenden strassenbelags und verfahren zur herstellung dieses mischgutes |
DE2919444A1 (de) * | 1979-05-15 | 1980-11-20 | Wibau Gmbh | Verfahren zur aufbereitung von giess- und/oder verdichtungsfaehigen asphaltbetonmassen fuer die herstellung von flaechigen belaegen, insbesondere strassendecken und estrichbelaegen in gebaeuden |
EP0153269A1 (de) * | 1984-02-03 | 1985-08-28 | MANNESMANN Aktiengesellschaft | Feinkorngemisch |
EP0332803A2 (de) * | 1988-03-12 | 1989-09-20 | Heinz Vonk | Strassenbelag aus einem Asphaltmischgut mit einer eishemmenden Komponente |
DE4129621A1 (de) * | 1991-09-06 | 1993-03-11 | Gruenau Gmbh Chem Fab | Pulverfoermiger hydrophober fueller fuer bitumengebundene verkehrsflaechen |
WO1993005233A1 (de) * | 1991-09-06 | 1993-03-18 | Chemische Fabrik Grünau Gmbh | Pulverförmiger hydrophober füller für bitumengebundene verkehrsflächen |
Also Published As
Publication number | Publication date |
---|---|
DE19519977C1 (de) | 1996-12-12 |
DE19680395D2 (de) | 1998-05-20 |
EP0828795A1 (de) | 1998-03-18 |
AU5684296A (en) | 1996-12-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0422753B1 (de) | Verfahren zur Herstellung eines hydrophobe Eigenschaften aufweisenden Feinkorngemisches | |
DE19523324C2 (de) | Verfahren zur Herstellung eines verfestigten Produkts | |
DE2945007A1 (de) | Verfahren zur endlagerreifen, umweltfreundlichen verfestigung von radioaktiven ionenaustauscherharzen | |
DE2827638A1 (de) | Antikorrosionspigment und dieses enthaltender waessriger antikorrosions- anstrich | |
DE2819974A1 (de) | Bodenverfestigungsmittel zur befestigung von erdmassen | |
DE69503945T2 (de) | Injektionsschlamm für die Beschichtung einer Bewehrung, insbesondere einer Vorgespannten Bewehrung | |
DE3335489A1 (de) | Haerter fuer alkalimetallsilikatloesungen fuer die bodenverfestigung | |
DE19519977C1 (de) | Verfahren zur Herstellung eines Zuschlagstoffs für den Straßenbau | |
EP0019086B1 (de) | Verfahren zur Herstellung von Entschweflungsmitteln für Roheisen- oder Stahlschmelzen | |
EP2300390B1 (de) | Zusatzmittel zum verfestigen von natürlichen böden und mineralischen baustoffen und verfahren zu dessen herstellung | |
DE2820452A1 (de) | Aktivator fuer granulierte schlacke | |
DE2836984C3 (de) | Selbsthärtende Formmasse für die Herstellung von Sandformen | |
DE3327348C2 (de) | ||
EP0925406B1 (de) | Zuschlagstoff für verkehrsflächen | |
DE3934657C2 (de) | Verfahren zur Herstellung eines nach außen hydrophobe Eigenschaften aufweisenden Feinkorngemisches | |
DE3221463A1 (de) | Verfahren zur herstellung eines leichtbaustoffes | |
DE2738415B2 (de) | Calciumsulfatfasern mit anorganischen Überzügen | |
EP2498595B1 (de) | Verfahren zur herstellung einer tierstreu | |
WO1987004452A1 (en) | Spreadable material and process for producing the same | |
DE3814684A1 (de) | Verfahren zur dekontaminierung elementares quecksilber enthaltender boeden | |
DE3913853A1 (de) | Verfahren zur aufarbeitung von phosphorsaeure | |
EP0012832A1 (de) | Verfahren zum Hydrophobieren von Hochofenschlacke | |
AT313779B (de) | Verfahren zum schutz von mineralischen baustoffen und daraus hergestellten bauteilen gegen aggressive einwirkungen | |
AT261219B (de) | Rieselfähige, stäbchenförmige oder als Wirrfasern vorliegende Preßmasse und Verfahren zu ihrer Herstellung | |
AT397263B (de) | Verfahren zum abdichten von boden und/oder seitenflächen sowie dichtmaterial zur durchführung dieses verfahrens |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1996914839 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1996914839 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1996914839 Country of ref document: EP |
|
REF | Corresponds to |
Ref document number: 19680395 Country of ref document: DE Date of ref document: 19980520 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 19680395 Country of ref document: DE |
|
NENP | Non-entry into the national phase |
Ref country code: CA |