LT3818B - Method for producing a building element and building element formed - Google Patents
Method for producing a building element and building element formed Download PDFInfo
- Publication number
- LT3818B LT3818B LTIP1768A LTIP1768A LT3818B LT 3818 B LT3818 B LT 3818B LT IP1768 A LTIP1768 A LT IP1768A LT IP1768 A LTIP1768 A LT IP1768A LT 3818 B LT3818 B LT 3818B
- Authority
- LT
- Lithuania
- Prior art keywords
- fly ash
- calcium hydroxide
- mixture
- water
- substance
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000000203 mixture Substances 0.000 claims abstract description 83
- 239000010881 fly ash Substances 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000126 substance Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000011362 coarse particle Substances 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 39
- 239000000920 calcium hydroxide Substances 0.000 claims description 39
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 39
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 39
- 239000008187 granular material Substances 0.000 claims description 27
- 239000004566 building material Substances 0.000 claims description 21
- 239000004567 concrete Substances 0.000 claims description 13
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 9
- 239000011449 brick Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- 235000013312 flour Nutrition 0.000 claims 1
- 239000010453 quartz Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 239000011230 binding agent Substances 0.000 abstract description 14
- 239000002956 ash Substances 0.000 description 23
- 238000010521 absorption reaction Methods 0.000 description 17
- 239000011575 calcium Substances 0.000 description 13
- 239000002245 particle Substances 0.000 description 12
- 239000002893 slag Substances 0.000 description 10
- 238000005469 granulation Methods 0.000 description 7
- 239000004575 stone Substances 0.000 description 6
- 230000003179 granulation Effects 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 235000011132 calcium sulphate Nutrition 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 238000005056 compaction Methods 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 229920006328 Styrofoam Polymers 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011381 foam concrete Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004572 hydraulic lime Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000008262 pumice Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000008261 styrofoam Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- JUGOREOARAHOCO-UHFFFAOYSA-M acetylcholine chloride Chemical compound [Cl-].CC(=O)OCC[N+](C)(C)C JUGOREOARAHOCO-UHFFFAOYSA-M 0.000 description 1
- 239000011469 building brick Substances 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- LRKMVRPMFJFKIN-UHFFFAOYSA-N oxocalcium hydrate Chemical compound [O].O.[Ca] LRKMVRPMFJFKIN-UHFFFAOYSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S106/00—Compositions: coating or plastic
- Y10S106/01—Fly ash
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Adhesives Or Adhesive Processes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8503127A NL8503127A (nl) | 1985-11-13 | 1985-11-13 | Werkwijze voor het vervaardigen van bouwmateriaal op basis van kolenas. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| LTIP1768A LTIP1768A (en) | 1995-07-25 |
| LT3818B true LT3818B (en) | 1996-03-25 |
Family
ID=19846862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LTIP1768A LT3818B (en) | 1985-11-13 | 1994-01-13 | Method for producing a building element and building element formed |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4780144A (forum.php) |
| EP (1) | EP0222457B1 (forum.php) |
| JP (1) | JPH0742156B2 (forum.php) |
| CN (1) | CN1015100B (forum.php) |
| AT (1) | ATE52754T1 (forum.php) |
| AU (1) | AU588934B2 (forum.php) |
| DE (1) | DE3671210D1 (forum.php) |
| ES (1) | ES2014414B3 (forum.php) |
| GR (1) | GR3000548T3 (forum.php) |
| IN (1) | IN168130B (forum.php) |
| LT (1) | LT3818B (forum.php) |
| NL (1) | NL8503127A (forum.php) |
| PH (1) | PH24717A (forum.php) |
| RU (1) | RU1802808C (forum.php) |
| UA (1) | UA12800A (forum.php) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4880582A (en) * | 1987-07-22 | 1989-11-14 | Aardelite Holding B. V. | Hardening granulated material at elevated temperatures |
| DE3728464A1 (de) * | 1987-08-26 | 1989-03-09 | Bergwerksverband Gmbh | Verfahren zur herstellung waermedaemmender voll- und lochsteine aus wirbelschichtrueckstaenden |
| NL8801506A (nl) * | 1988-06-13 | 1990-01-02 | Aardelite Holding Bv | Werkwijze voor het vervaardigen van een kolenas bevattend hardbaar mengsel; werkwijze voor het vervaardigen van kolenasbevattende geharde korrels en kolenas bevattend bouwelement. |
| DE3934948A1 (de) * | 1989-10-20 | 1991-04-25 | Inca Baustofftechnik Gmbh | Verfahren zur entsorgung von staeuben aus abfallverbrennungsanlagen |
| US5137753A (en) * | 1990-10-25 | 1992-08-11 | Bland Alan E | Pelletizing ash |
| DE4119390C2 (de) * | 1991-06-12 | 1995-09-14 | Johne Patricia Vertreten Durch | Verfahren zum Aufbereiten und auslaugbeständigen Verfestigen von Filterstäuben und Reaktionsprodukten aus der Rauchgasreinigung von Abfall- und Klärschlammverbrennungsanlagen |
| KR930002270A (ko) * | 1991-07-05 | 1993-02-22 | 에스. 리들 미첼 | 플라이 애쉬(fly ash) 조성물 및 이로부터의 물품 제조 방법 |
| US5366548A (en) * | 1991-07-05 | 1994-11-22 | Riddle Mitchell S | Volcanic fly ash and kiln dust compositions, and a process for making articles therefrom |
| US5374309A (en) * | 1993-02-26 | 1994-12-20 | Blue Circle America, Inc. | Process and system for producing cementitious materials from ferrous blast furnace slags |
| US5583079A (en) * | 1994-07-19 | 1996-12-10 | Golitz; John T. | Ceramic products, of glass, fly ash and clay and methods of making the same |
| CN1042925C (zh) * | 1995-06-28 | 1999-04-14 | 华南理工大学 | 一种水泥促凝剂的制备方法及其应用 |
| US6309570B1 (en) | 1998-01-14 | 2001-10-30 | American Equipment Systems | Vacuum extrusion system for production of cement-based articles |
| US8118927B2 (en) * | 2002-08-02 | 2012-02-21 | Price Charles E | Cementitious compositions and methods of making and using |
| US7716901B2 (en) | 2004-05-27 | 2010-05-18 | Price Charles E | Packaging for particulate and granular materials |
| TWI397511B (zh) | 2005-01-14 | 2013-06-01 | Alkemy Ltd | 含污水淤泥與其他廢棄物的合成聚集體以及製造此類聚集體的方法 |
| US7780781B2 (en) * | 2005-01-14 | 2010-08-24 | Alkemy, Ltd. | Pyroprocessed aggregates comprising IBA and low calcium silicoaluminous materials and methods for producing such aggregates |
| GR1006855B (el) * | 2005-01-14 | 2010-07-06 | Σοφια Μπεθανη | Δομικα υλικα με χρηση αδρανων απο στερεα αποβλητα |
| US7998268B2 (en) * | 2005-06-29 | 2011-08-16 | Ecologic Tech Company, Inc. | Method to produce durable non-vitrified fly ash bricks and blocks |
| US7459411B2 (en) * | 2005-10-14 | 2008-12-02 | B.B.B.-Development And Production Of Building Products Ltd. | Ceramic building elements |
| US20070289503A1 (en) * | 2006-06-20 | 2007-12-20 | Hendrik Loggers | Process turning fly ash into useful building blocks and the like |
| US8257486B2 (en) * | 2008-03-26 | 2012-09-04 | Council Of Scientific & Industrial Research | Composition for building material and a process for the preparation thereof |
| US8617308B1 (en) | 2010-07-01 | 2013-12-31 | Calstar Products, Inc. | Fly ash-based cementitious mixture |
| CN102060456B (zh) * | 2010-11-22 | 2013-05-01 | 同济大学 | 一种固化垃圾焚烧飞灰为高强度材料的方法 |
| CA3002529C (en) * | 2015-10-20 | 2024-01-30 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Fly ash-containing construction material with improved strength and water resistance and methods of forming the same |
| GB201520515D0 (en) | 2015-11-20 | 2016-01-06 | Univ Heriot Watt | Construction unit |
| CN108883985A (zh) | 2016-02-19 | 2018-11-23 | 代表亚利桑那大学的亚利桑那校董会 | 具有改进的强度和耐水性的建筑材料及其形成方法 |
| PL241732B1 (pl) * | 2017-09-28 | 2022-11-28 | Akademia Gorniczo Hutnicza Im Stanislawa Staszica W Krakowie | Sposób redukcji poziomu wymywalności chlorków z mieszanin mineralnych zawierających odpady wykazujące się wysokimi stężeniami rozpuszczalnych chlorków |
| KR102696180B1 (ko) * | 2019-01-02 | 2024-08-20 | 상하이 성쿠이 프로덕츠. 코., 엘티디 | 보온 플레이트 원료 조성물, 보온 플레이트 및 이의 제조 공정 |
| JP2023513724A (ja) * | 2020-02-10 | 2023-04-03 | 上海聖奎塑業有限公司 | 耐火保温材及びその製造工程 |
| CN112573868B (zh) * | 2020-12-25 | 2022-10-21 | 广东工业大学 | 一种花岗岩微粉地聚物复合基及其制备方法和应用 |
| CN113896510B (zh) * | 2021-11-27 | 2022-10-28 | 广西晖龙科技有限公司 | 一种利用粉煤灰制备轻质建筑材料的工艺 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3321889A1 (de) | 1982-06-16 | 1983-12-22 | Swenco Ltd., Waterloo, Ontario | Sohleneinlage |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE600437C (de) * | 1933-03-12 | 1934-07-23 | Rostone Inc | Verfahren zur Herstellung eines kuenstlichen Baustoffes |
| US2564690A (en) * | 1948-06-30 | 1951-08-21 | Jules E Havelin | Hydrated lime-fly ash-fine aggregate cement |
| US2942993A (en) * | 1958-02-07 | 1960-06-28 | Richard L Handy | Method of accelerating the setting of lime-fly ash-soil mixes |
| US3192060A (en) * | 1961-05-24 | 1965-06-29 | Benjamin L Tilsen | Lightweight aggregate and method of producing same |
| DE1471360A1 (de) * | 1963-04-16 | 1969-04-10 | Oettershagen Dr Karl | Herstellung von Pellets aus Flugasche der Steinkohlenfeuerungen-gegebenenfalls unter Zusatz von Schmelzkammerasche-und Zement oder Kalk und/oder Ton oder Anhydrit |
| US3852084A (en) * | 1970-03-30 | 1974-12-03 | C Smith | Cementitious composition containing activated lime-fly ash mixture |
| GB1362372A (en) * | 1972-09-07 | 1974-08-07 | Reid N G | Cement |
| US4105463A (en) * | 1975-12-11 | 1978-08-08 | The University Of Toledo | Lime-fly ash-aggregate-sludge paving material |
| US4054463A (en) * | 1976-05-07 | 1977-10-18 | Lin Ping Wha | Process for producing cementitious product from quenched fly ash |
| JPS5918340B2 (ja) * | 1979-11-19 | 1984-04-26 | 株式会社クボタ | 無機質板の製造方法 |
| NL182953C (nl) | 1980-04-17 | 1988-06-16 | Aardelite Holding Bv | Werkwijze voor het vormen van deeltjesvormig materiaal. |
| EP0038599B2 (en) * | 1980-04-17 | 1990-08-29 | Aardelite Holding B.V. | Granulated material comprising a filler and an inorganic binding agent |
| SU1020403A1 (ru) * | 1981-11-18 | 1983-05-30 | Государственный Всесоюзный научно-исследовательский институт строительных материалов и конструкций им.П.П.Будникова | Способ изготовлени стеновых изделий |
| DE3321899A1 (de) * | 1983-06-16 | 1984-12-20 | Steag-Entsorgungs-GmbH, 4220 Dinslaken | Verfahren zur herstellung von mauersteinen |
| GB2159143B (en) * | 1984-04-12 | 1987-06-17 | Granulite Ltd | Lightweight aggregate |
-
1985
- 1985-11-13 NL NL8503127A patent/NL8503127A/nl not_active Application Discontinuation
-
1986
- 1986-11-07 AU AU64929/86A patent/AU588934B2/en not_active Ceased
- 1986-11-07 US US06/928,254 patent/US4780144A/en not_active Expired - Fee Related
- 1986-11-10 ES ES86201966T patent/ES2014414B3/es not_active Expired - Lifetime
- 1986-11-10 AT AT86201966T patent/ATE52754T1/de not_active IP Right Cessation
- 1986-11-10 EP EP19860201966 patent/EP0222457B1/en not_active Expired - Lifetime
- 1986-11-10 DE DE8686201966T patent/DE3671210D1/de not_active Revoked
- 1986-11-12 UA UA4028543A patent/UA12800A/uk unknown
- 1986-11-12 PH PH34467A patent/PH24717A/en unknown
- 1986-11-12 RU SU864028543A patent/RU1802808C/ru active
- 1986-11-12 JP JP27080886A patent/JPH0742156B2/ja not_active Expired - Lifetime
- 1986-11-13 CN CN86107869A patent/CN1015100B/zh not_active Expired
- 1986-12-09 IN IN953/MAS/86A patent/IN168130B/en unknown
-
1990
- 1990-06-11 GR GR90400141T patent/GR3000548T3/el unknown
-
1994
- 1994-01-13 LT LTIP1768A patent/LT3818B/lt not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3321889A1 (de) | 1982-06-16 | 1983-12-22 | Swenco Ltd., Waterloo, Ontario | Sohleneinlage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1015100B (zh) | 1991-12-18 |
| JPH0742156B2 (ja) | 1995-05-10 |
| PH24717A (en) | 1990-10-01 |
| ES2014414B3 (es) | 1990-07-16 |
| US4780144A (en) | 1988-10-25 |
| UA12800A (uk) | 1997-02-28 |
| NL8503127A (nl) | 1987-06-01 |
| AU6492986A (en) | 1987-05-21 |
| LTIP1768A (en) | 1995-07-25 |
| DE3671210D1 (de) | 1990-06-21 |
| GR3000548T3 (en) | 1991-07-31 |
| EP0222457B1 (en) | 1990-05-16 |
| EP0222457A1 (en) | 1987-05-20 |
| CN86107869A (zh) | 1987-08-05 |
| RU1802808C (ru) | 1993-03-15 |
| JPS62113748A (ja) | 1987-05-25 |
| ATE52754T1 (de) | 1990-06-15 |
| AU588934B2 (en) | 1989-09-28 |
| IN168130B (forum.php) | 1991-02-09 |
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