NO124114B - - Google Patents
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- Publication number
- NO124114B NO124114B NO154242A NO15424264A NO124114B NO 124114 B NO124114 B NO 124114B NO 154242 A NO154242 A NO 154242A NO 15424264 A NO15424264 A NO 15424264A NO 124114 B NO124114 B NO 124114B
- Authority
- NO
- Norway
- Prior art keywords
- rubber
- bitumen
- bituminous
- mixture
- adhesive
- Prior art date
Links
- 229920001971 elastomer Polymers 0.000 claims description 26
- 239000010426 asphalt Substances 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 4
- 238000010285 flame spraying Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 239000013521 mastic Substances 0.000 claims description 3
- 239000008267 milk Substances 0.000 claims description 3
- 210000004080 milk Anatomy 0.000 claims description 3
- 235000013336 milk Nutrition 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 2
- 235000013351 cheese Nutrition 0.000 claims 1
- 239000000853 adhesive Substances 0.000 description 25
- 230000001070 adhesive effect Effects 0.000 description 25
- 238000003756 stirring Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004822 Hot adhesive Substances 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000011271 tar pitch Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000227 bioadhesive Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J195/00—Adhesives based on bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08L2666/04—Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
- C08L2666/08—Homopolymers or copolymers according to C08L7/00 - C08L21/00; Derivatives thereof
Description
Fremgangsmåte for feste av bituminøse Procedure for fixing bituminous
beleggmasser på stål eller betong. coating compounds on steel or concrete.
Bituminose beleggmasser, f.eks. stopeasfalt som er asfalt med iblandet flis e.l. blir hensiktsmessig klebet på underlagskonstruksjoner av stål eller betong. En effektiv påHebing setter kjorebanen i stand til å overfore de betraktelige trykkspenninger som oppstår ved trafikkpåkjenninger sikkert til bro-konstruksjonen. Videre forhindrer en intim klebing at det oppstår såkalte blærekimer dvs. fuktighetsreder mellom bro-konstruksjonen og brobelegget og dermed blæredannelse. Hvis beleggmassen ikke legges direkte på bro-konstruksjonen, men det legges inn en fuktighetsisolering eller korrosjonsbeskyttelse, så må det sorges for at det ved en sammenklebing av disse lag med bro-konstruksjonen og eventuelt ved ekstra klebing av kjorebanedekket til disse lag, bli mulig å Bituminous coating materials, e.g. stopeasphalt, which is asphalt mixed with chippings, etc. is suitably glued to substructures made of steel or concrete. An efficient påHebing enables the carriageway to safely transfer the considerable compressive stresses that arise from traffic stresses to the bridge structure. Furthermore, an intimate bond prevents the formation of so-called blister germs, i.e. nests of moisture between the bridge structure and the bridge covering and thus the formation of blisters. If the coating compound is not placed directly on the bridge structure, but a moisture insulation or corrosion protection is added, then it must be ensured that by gluing these layers to the bridge structure and possibly by additional gluing of the carriageway cover to these layers, it becomes possible to
oppnå en feilfri videreføring av trykk-kreftene. achieve a faultless transmission of the pressure forces.
Den naturlige klebekraft for bituminose beleggmasser på en betong-eller ståldel er ikke på langt nær tilstrekkelig. Det samme gjelder for de fleste fuktighetsisolasjoner eller korrosjonsbeskyttelseslag. Spesielt ved bro-deler blir det derfor i alminnelighet arbeidet med spesielle klebemasser. Det er kjent bituminose klebemasser som dog ofte ikke tilfredsstiller fordringene. De fleste bituminose" klebemasser brukes i kald tilstand. De består også i det vesentlige av biturnen eller tjærebek eller flussmidler. Den tilstrebede kraftoverforende klebing blir som oftest og erfaringsmessig ikke oppnådd med slike flussede bituminose klebemasser. Tilsynelatende vil det ved påforing av de etterfølgende lag, hvis opparbeidelse i regelen foregår varmt, også etter lengere fordampningstid bli fri rester av opplosningsmiddel og disse vil hindre en intim forbindelse. Også bituminose klebemasser som opparbeides i varm tilstand, f.eks. bitumina i henhold til DIN 1995 eller spesielle klebemasser på tjærebekbasis, bringer imidlertid meget ofte ikke det onskede resultat. Ved påforing av de varme klebemasser på de kalde underlag, som eksempelvis kan være av stål, inntrer det ved den plutselige avkjoling en herding som hindrer en intim sammenklebing. Også de harpiksklebemasser som er innfort i nyere tid, er heller ikke alltid tilfredsstillende. De er dertil som regel meget kostbare og omfindtlige under opparbeidelse. The natural adhesive force of bituminous coating compounds on a concrete or steel part is nowhere near sufficient. The same applies to most moisture insulation or corrosion protection layers. Especially with bridge parts, work is therefore generally done with special adhesives. There are known bituminous adhesives which, however, often do not meet the requirements. Most "bituminous" adhesives are used in a cold state. They also essentially consist of biturne or tar pitch or fluxes. The desired force-transmitting adhesive is most often and from experience not achieved with such fluxed bituminous adhesives. Apparently, when applying the subsequent layers, if processing usually takes place hot, even after a longer evaporation time solvent residues become free and these will prevent an intimate connection. Also bituminous adhesives that are processed in a hot state, e.g. bitumina according to DIN 1995 or special adhesives based on tar pitch, bring however, very often not the desired result. When the hot adhesives are applied to the cold substrates, which can for example be of steel, a hardening occurs during the sudden cooling which prevents an intimate bonding. Also the resin adhesives that have been applied in recent times, are not always satisfactory either.They are also usually very expensive are and bulky under processing.
De krav som stilles til klebemasser er faktisk overordentlig hoye. Således vil bituminose bro-belegg ofte anta temperaturer på 60°C eller ennå hoyere i solskinn. Om vinteren inntrer temperaturer på opptil -30°C og mindre. For dette temperaturområdet på ca.100°C, kreves det en effektiv klebing. Klebingen må også holde seg helt effektiv, selv om det, som det ofte skjer om våren, inntrer raske betraktelige temperaturfall, f.eks. solskinn om dagen - kulde om natten. The demands placed on adhesives are actually extremely high. Thus, bituminous bridge pavements will often assume temperatures of 60°C or even higher in sunshine. In winter, temperatures of up to -30°C and less occur. For this temperature range of approx. 100°C, an effective adhesion is required. The adhesive must also remain completely effective, even if, as often happens in the spring, there are rapid, considerable temperature drops, e.g. sunshine during the day - cold at night.
For å forbedre egenskapene for bituminose stoffer, også bituminose gatebelegg-masser, er det kjent til de bituminose masser å sette gummimelk eller pulverformet gummi. Det har herunder vist seg hensiktsmessig å bruke et forhold mellom gummi og bituminost bindemiddel på ca. 1:20. En slik gummitilsetning skal oke plastisitets-området for bindemidlet, nedsette dens aldring og forbedre gripe-evnen og slitestyrken for de bituminose masser som er fremstilt av den. Vanskeligheten ved å klebe bituminose beleggmasser på underlagskonstruksjoner, blir dog ikke påvirket ved disse kjente forholdsregler. In order to improve the properties of bituminous substances, including bituminous road paving masses, it is known to add rubber milk or powdered rubber to the bituminous masses. Here, it has proven appropriate to use a ratio between rubber and bituminous binder of approx. 1:20. Such a rubber addition should increase the plasticity range of the binder, reduce its aging and improve the grip and wear resistance of the bituminous masses produced from it. The difficulty of gluing bituminous coating compounds to substructures, however, is not affected by these known precautions.
Det har vist seg at en blanding, fremstilt ved koking av bitumen It has been found that a mixture, prepared by boiling bitumen
og gummi egner seg utmerket som klebemasse for påklebing av bituminose beleggmasser på bro-konstruksjoner som består av stål eller betong. Det trenges imidlertid vesentlig storre gummimengder, regnet på det bituminose bindemiddel, trenges det ca.1:<*>f - 1:6. ;Foreliggende oppfinnelse går folgelig ut på en fremgangsmåte for feste av bituminose beleggmasser på underlag som består av slåL eller betong, ved hjelp av en i og for seg.kjent bitumen-gummi-blanding, hvor det særegne består i at det på underlaget, etter at dette er renset, og eventuelt forsynt med et stovbinde-belegg, anbringes en blanding som er fremstilt ved koking og som består av 75- 85% bitumen og 25-15% gummi i form av gummipulver, gummispon eller gummimelk, hvoretter det anbringes en fuktighetsisolasjon i form av et asfaltmastixlag og/eller det bituminose kjorebanebelegg. Hensiktsmessig blir det som bitumen brukt et bitumenB 200 i henhold til DIN 1995)og som tilblanding til bitumene blir det brukt gummispon. Betegnelsen gummispon betyr herunder finkornet eller pulverformet vulkanisert gummi, som er fremstilt ved riving, slik som det eksempelvis og spesielt forekommer ved opparbeidelse av gamle bilringer. ;I en foretrukket utforelsesform blir denne blanding kokt i ca. 5?fortrinnsvis 10-15 timer. Nettopp da, og når blandingen består av ca. 80% bitumen B 200 (DIN 1995) og ca. 20% gummispon, oppnås den optimale klebekraft over hele det temperaturområdet som er angitt ovenfor. Hensiktsmessig blir kokingen og blandingen gjennom-fort slik at den ferdige blanding ennå inneholder ikke opploste, nærmest gelatinaktige gummideler. ;De fordeler som oppnås ved fremgangsmåten i henhold til oppfinnelsen består i en overraskende klebekraft for klebemassen nettopp for bro-beleggstoffer på en underkonstruksjon av stål eller betong for de angitte påkjenninger og temperaturer. Klebemassen som herunder brukes har sin optimale klebekaft ved en hinnetykkelse på ^00-1000/» fortrinnsvis ca. 500 yu. Fremgangsmåten i henhold til oppfinnelsen kan, nettopp med slike lagtykkelser, også brukes for andre formål, f.eks. fuktighetsisolering eller korrosjonsbeskyttelse. ;For å oppnå en jevn påforing av jevnt tykke klebemassehinner blir det hensiktsmessig brukt såkalt flammesproyting, hvor påusproytingen av det varme klebemiddel foregår i en flammekappe. Denne fremgangsmåte byr den fordel at underlaget eventuelt blir forvarmet og torket i en særskilt arbeidsprosess for påsproytingen, og på den annen side, etter påsproytingen, kan det ved bestrykning med flammen oppnås et samlop av klebemassen til en jevnt tykk hinne. ;Fordelene ved fremgangsmåten i henhold til oppfinnelsen vil fremgå av de folgende eksempler: ;Eksempel 1. ;800 kg bitumen B 200 (DIN 1995) ble oppvarmet under stadig omroring til 200«- 220°C. Under stadig videre omroring og mens massen ble holdt varm, ble det i lopet av h timer fort 200 kg gummispon inn i den varme masse. Blandingen ble deretter holdt varm i ytterligere 8 timer, og omrort hvoretter den ble fylt i fat og fikk kjbles. ;For fremstilling av et kjorebanebelegg på kjorebanen for lett trafikk på en stålbro, ble den klebemasse som er fremstilt på ;denne måten, oppvarmet i en bitumenkoker under omroring til ca. ;170 - 180°C og i en mengde på 0,6 kg/m^ ved flammesproyting påfort den torkede og rustfrie stålplate. Underlaget av stål var gjort rustfritt og metallisk blankt ved sandblåsing i henhold til DIN 1836U siffer 3«212,3. Fuktighet måtte fjernes ved hjelp av flamme-apparatet. Påsproytingen av klebemassen foregitt gjennom munnstykker ved trykk på ca. 5 atm.overtrykk. Munnstykkene var omgitt av en propangass-rundbrenner, slik at påsproytingen foregikk i en luft- ;og flamme-kappe. ;På klebemassehinnen ble det så lagt en bituminos beleggmasse. ;Eksempel 2. ;200 kg bitumen B 65 (DIN 1995) ble oppvarmet i etasf alt-roreverk til 200-220°C. Under stadig omroring og mens massen ble holdt varm, ble det forsiktig, i tynn stråle, for å hindre skumming, innfort 200 kg av en 60% latexemulsjon. Deretter ble ytterligere 600 kg bitumen B 65 smeltet inn og etterkokt. -Den samlede koketid inklusive etterkokingen var 15 timer. ;Underlaget på en forspent stålbetong-bro ble for påforingen av ;denne klebemasse renset for smuss og lose deler, og for stovbinding, bestroket med 0,3 kg/m av en bitumen-opplosning. Påforingen av klebemassen foregikk slik som i eksempel 1 ved hjelp av flammesproyting etter fordamping av flussmidlet i en mengde på 0,<*>+ kg/m 2. Under mellomlegg av et skillelag ble det som fuktighetsisolering pålagt 20-25 kg/m 2 asfaltmastix og som kjbrebelegg 5 cm stopeasfalt i 2 lag. and rubber is excellently suitable as an adhesive compound for sticking bituminous coating compounds on bridge constructions made of steel or concrete. However, significantly larger quantities of rubber are needed, calculated on the bituminous binder, approx. 1:<*>f - 1:6 is needed. The present invention is therefore based on a method for fixing bituminous coating compounds on a substrate consisting of clay or concrete, using a bitumen-rubber mixture known per se, where the peculiarity is that on the substrate, after that this has been cleaned, and possibly provided with a dust binding coating, a mixture is applied which is prepared by boiling and which consists of 75-85% bitumen and 25-15% rubber in the form of rubber powder, rubber shavings or rubber milk, after which a moisture insulation in the form of an asphalt mastic layer and/or the bituminous road surface. Appropriately, a bitumen B 200 is used as bitumen in accordance with DIN 1995) and rubber chips are used as an admixture to the bitumen. The term rubber chips also means fine-grained or powdered vulcanized rubber, which is produced by tearing, such as occurs, for example and in particular, when processing old car tires. In a preferred embodiment, this mixture is boiled for approx. 5?preferably 10-15 hours. Just then, and when the mixture consists of approx. 80% bitumen B 200 (DIN 1995) and approx. 20% rubber shavings, the optimum adhesive force is achieved over the entire temperature range indicated above. Appropriately, the boiling and mixing are carried out quickly so that the finished mixture still contains undissolved, almost gelatinous rubber parts. The advantages achieved by the method according to the invention consist in a surprising adhesive force for the adhesive especially for bridge coating materials on a substructure of steel or concrete for the specified stresses and temperatures. The adhesive compound used below has its optimal adhesive bond at a film thickness of ^00-1000/», preferably approx. 500 yu. The method according to the invention can, precisely with such layer thicknesses, also be used for other purposes, e.g. moisture insulation or corrosion protection. In order to achieve a uniform application of uniformly thick adhesive compound membranes, so-called flame spraying is appropriately used, where the spraying of the hot adhesive takes place in a flame jacket. This method offers the advantage that the substrate is possibly pre-heated and dried in a separate work process for the application, and on the other hand, after the application, a confluence of the adhesive compound into a uniformly thick film can be achieved by coating with the flame. ;The advantages of the method according to the invention will be apparent from the following examples: ;Example 1. ;800 kg of bitumen B 200 (DIN 1995) was heated with constant stirring to 200°-220°C. During continuous stirring and while the mass was kept warm, in the course of h hours 200 kg of rubber shavings quickly entered the hot mass. The mixture was then kept warm for a further 8 hours, and stirred, after which it was filled into barrels and allowed to boil. For the production of a carriageway coating on the carriageway for light traffic on a steel bridge, the adhesive mass produced in this way was heated in a bitumen boiler while stirring to approx. ;170 - 180°C and in a quantity of 0.6 kg/m^ by flame spraying applied to the dried and stainless steel sheet. The steel substrate was made stainless and metallic bright by sandblasting in accordance with DIN 1836U number 3«212.3. Moisture had to be removed using the flame apparatus. The adhesive is sprayed on through nozzles at a pressure of approx. 5 atm overpressure. The nozzles were surrounded by a propane gas round burner, so that the spraying took place in an air and flame envelope. A bituminous coating compound was then laid on the adhesive membrane. ;Example 2. ;200 kg of bitumen B 65 (DIN 1995) was heated in an etasflot stirrer to 200-220°C. Under constant stirring and while the mass was kept warm, 200 kg of a 60% latex emulsion was introduced carefully, in a thin stream, to prevent foaming. Then a further 600 kg of bitumen B 65 was melted in and reboiled. - The total cooking time including the after-cooking was 15 hours. For the application of this adhesive, the substrate on a prestressed reinforced concrete bridge was cleaned of dirt and loose parts, and for pile bonding, coated with 0.3 kg/m of a bitumen solution. The application of the adhesive material took place as in example 1 by means of flame spraying after evaporation of the flux in an amount of 0.<*>+ kg/m 2. Between laying a separating layer, 20-25 kg/m 2 of asphalt mastic was applied as moisture insulation and as a road surface 5 cm asphalt asphalt in 2 layers.
Det klebemiddel som brukes ved fremgarigsmåten i henhold til oppfinnelsen, egner seg spesielt for brobelegg, særlig for lette kjoretoyer av isolering og dekke som er lagt på bro-under-konstruksjonen under mellomlegg av et skillelag, idet det særegne består i at isolasjonen punktvis blir tilsluttet bro-konstruksjonen og gjennom disse tilslutningspunkter, dessuten, foruten klebefriks jon mellom skillelagene, underkonstruksjonen og isolasjonen forbindes trykkfast med underkonstruksjonen. Spesielt har fremgangsmåten vist seg gunstig for tykkere lag, for å unngå de spenninger som ellers ville opptre. The adhesive used in the method according to the invention is particularly suitable for bridge coverings, in particular for light vehicles made of insulation and cover which are laid on the bridge sub-structure under the interposition of a separating layer, the peculiarity being that the insulation is connected at points the bridge structure and through these connection points, moreover, apart from adhesive friction between the separation layers, the substructure and the insulation are pressure-tightly connected to the substructure. In particular, the method has proven beneficial for thicker layers, to avoid the stresses that would otherwise occur.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET24405A DE1265185B (en) | 1963-08-01 | 1963-08-01 | Process for gluing bituminous bridge coverings with roadway structures made of steel or concrete |
Publications (1)
Publication Number | Publication Date |
---|---|
NO124114B true NO124114B (en) | 1972-03-06 |
Family
ID=7551434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO154242A NO124114B (en) | 1963-08-01 | 1964-07-31 |
Country Status (11)
Country | Link |
---|---|
AT (1) | AT252788B (en) |
BE (1) | BE651227A (en) |
CH (1) | CH470448A (en) |
DE (1) | DE1265185B (en) |
DK (1) | DK116668B (en) |
FI (1) | FI47345C (en) |
GB (1) | GB1020415A (en) |
LU (1) | LU46624A1 (en) |
NL (1) | NL6408884A (en) |
NO (1) | NO124114B (en) |
SE (1) | SE300579B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3844668A (en) * | 1972-01-13 | 1974-10-29 | R Winters | Pavement composition |
GB2486018B (en) | 2010-12-02 | 2015-07-15 | Bedford Hospital Nhs Trust | Measurement and reporting apparatus |
-
1963
- 1963-08-01 DE DET24405A patent/DE1265185B/en active Pending
-
1964
- 1964-07-27 LU LU46624D patent/LU46624A1/xx unknown
- 1964-07-29 CH CH995464A patent/CH470448A/en not_active IP Right Cessation
- 1964-07-30 SE SE9257/64A patent/SE300579B/xx unknown
- 1964-07-30 AT AT656264A patent/AT252788B/en active
- 1964-07-31 BE BE651227D patent/BE651227A/xx unknown
- 1964-07-31 DK DK379664AA patent/DK116668B/en unknown
- 1964-07-31 FI FI641649A patent/FI47345C/en active
- 1964-07-31 NO NO154242A patent/NO124114B/no unknown
- 1964-08-03 NL NL6408884A patent/NL6408884A/xx unknown
- 1964-08-04 GB GB31731/64A patent/GB1020415A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1020415A (en) | 1966-02-16 |
DE1265185B (en) | 1968-04-04 |
CH470448A (en) | 1969-03-31 |
BE651227A (en) | 1964-11-16 |
SE300579B (en) | 1968-04-29 |
FI47345C (en) | 1973-11-12 |
AT252788B (en) | 1967-03-10 |
FI47345B (en) | 1973-07-31 |
DK116668B (en) | 1970-02-02 |
LU46624A1 (en) | 1964-09-28 |
NL6408884A (en) | 1965-02-02 |
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