PT3535226T - Método para aplicar um material à base de cimento não-portland - Google Patents

Método para aplicar um material à base de cimento não-portland

Info

Publication number
PT3535226T
PT3535226T PT169206018T PT16920601T PT3535226T PT 3535226 T PT3535226 T PT 3535226T PT 169206018 T PT169206018 T PT 169206018T PT 16920601 T PT16920601 T PT 16920601T PT 3535226 T PT3535226 T PT 3535226T
Authority
PT
Portugal
Prior art keywords
applying
based material
portland cement
portland
cement
Prior art date
Application number
PT169206018T
Other languages
English (en)
Portuguese (pt)
Original Assignee
En Tech Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by En Tech Corp filed Critical En Tech Corp
Publication of PT3535226T publication Critical patent/PT3535226T/pt

Links

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
    • C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C9/00—General arrangement or layout of plant
    • B28C9/002—Mixing systems, i.e. flow charts or diagrams; Making slurries; Involving methodical aspects; Involving pretreatment of ingredients; Involving packaging
    • B28C9/004—Making slurries, e.g. with discharging means for injecting in a well or projecting against a wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C9/00—General arrangement or layout of plant
    • B28C9/04—General arrangement or layout of plant the plant being mobile, e.g. mounted on a carriage or a set of carriages
    • B28C9/0454—Self-contained units, i.e. mobile plants having storage containers for the ingredients
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • 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
    • C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
    • C04B28/008—Mineral polymers other than those of the Davidovits type, e.g. from a reaction mixture containing waterglass
    • 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
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
    • C04B2111/00172—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite by the wet process
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • C04B2111/1018—Gypsum free or very low gypsum content cement compositions
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • C04B2111/1037—Cement free compositions, e.g. hydraulically hardening mixtures based on waste materials, not containing cement as such
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/72—Repairing or restoring existing buildings or building materials
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
PT169206018T 2016-11-04 2016-11-04 Método para aplicar um material à base de cimento não-portland PT3535226T (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2016/060639 WO2018084858A1 (en) 2016-11-04 2016-11-04 System and method for making and applying a non-portland cement-based material

Publications (1)

Publication Number Publication Date
PT3535226T true PT3535226T (pt) 2023-04-05

Family

ID=62075599

Family Applications (1)

Application Number Title Priority Date Filing Date
PT169206018T PT3535226T (pt) 2016-11-04 2016-11-04 Método para aplicar um material à base de cimento não-portland

Country Status (18)

Country Link
EP (2) EP3816132A1 (https=)
JP (2) JP2019532907A (https=)
CN (1) CN110662725A (https=)
AU (1) AU2016428605B2 (https=)
CA (1) CA3042855C (https=)
DK (1) DK3535226T3 (https=)
ES (1) ES2941671T3 (https=)
FI (1) FI3535226T3 (https=)
HR (1) HRP20230320T1 (https=)
HU (1) HUE061676T2 (https=)
LT (1) LT3535226T (https=)
PL (1) PL3535226T3 (https=)
PT (1) PT3535226T (https=)
RS (1) RS64093B1 (https=)
RU (1) RU2733365C1 (https=)
SI (1) SI3535226T1 (https=)
SM (1) SMT202300103T1 (https=)
WO (1) WO2018084858A1 (https=)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019124726A1 (de) * 2019-09-13 2021-03-18 METTEN Consulting GmbH Betonelement und Verfahren zu seiner Herstellung
JPWO2023204116A1 (https=) * 2022-04-18 2023-10-26
AU2023353787A1 (en) * 2022-09-26 2025-03-06 Tokuyama Corporation Geopolymer composition manufacturing method and geopolymer cured body manufacturing method
CN117776639A (zh) * 2023-12-15 2024-03-29 中铁第四勘察设计院集团有限公司 一种海底隧道用高性能喷射混凝土及其施工应用方法
DE102024002925A1 (de) 2024-09-12 2026-03-12 Kortmann Beton GmbH & Co. KG Verfahren zur Herstellung zementfreier Formelemente, dafür vorgesehene Einrichtung sowie erzeugbare Formelemente

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700535A (en) * 1951-06-29 1955-01-25 Russell J Harrington Apparatus for applying a cement coating
US3107901A (en) * 1959-08-03 1963-10-22 Harold M Zimmerman Pre-mixed concrete system
SE383910B (sv) * 1974-08-02 1976-04-05 Sandell Bertil Sett att tillverka betongkonstruktioner
JPS5930747A (ja) * 1982-08-16 1984-02-18 電気化学工業株式会社 吹付モルタル・コンクリ−ト組成物
DE3623631C1 (en) * 1986-07-12 1987-08-13 Karl Dipl-Ing Schlecht Distributor mast
DE3825161A1 (de) * 1988-07-23 1990-01-25 Henkel KGaA, 4000 Düsseldorf Staubbindemittel fuer das betonspritzverfahren (ii)
ATA239993A (de) * 1993-11-26 1994-08-15 Zementwerk Leube Ges M B H Zement zur spritzbetonherstellung sowie verfahren und vorrichtung zum herstellen von spritzbeton aus diesem zement
JPH1025138A (ja) * 1996-05-10 1998-01-27 Sekisui Chem Co Ltd 硬化性無機質組成物
JP3657058B2 (ja) * 1996-06-21 2005-06-08 電気化学工業株式会社 セメント混和材及びセメント組成物
KR0184357B1 (ko) * 1996-09-09 1999-04-15 김문한 시멘트 혼합용 할로이사이트를 주성분으로 하는 활성 고령토 물질 및 그 제조 방법
AT5719U1 (de) * 2001-03-08 2002-10-25 Doubrava Gmbh & Co Kg Spritzanlage und spritzverfahren für die herstellung von spritzbeton
CN100339547C (zh) * 2005-05-25 2007-09-26 中国人民解放军后勤工程学院 车载式多功能混凝土施工设备
US8795429B2 (en) * 2010-12-30 2014-08-05 United States Gypsum Company Method for in-situ manufacture of a lightweight fly ash based aggregate
WO2010121886A1 (de) * 2009-04-22 2010-10-28 Construction Research & Technology Gmbh Schwundarmes bindemittelsystem
JP5416486B2 (ja) * 2009-06-04 2014-02-12 一般財団法人電力中央研究所 ゼオライト含有硬化体の製造方法
WO2011064005A1 (en) * 2009-11-26 2011-06-03 Construction Research & Technology Gmbh Inorganic binder system for the production of chemically resistant construction chemistry products
US20110132230A1 (en) * 2009-12-08 2011-06-09 Chan Han Geopolymer precursor dry mixture, package, processes and methods
EP2428499A1 (de) * 2010-09-13 2012-03-14 Construction Research & Technology GmbH Verwendung von aluminium- und siliziumhaltigen Verbindungen zur Herstellung eines hydrophilen Baustofferzeugnisses
US8512468B2 (en) * 2010-12-20 2013-08-20 Louisiana Tech University Research Foundation, A Division Of Louisiana Tech University Foundation, Inc. Geopolymer mortar and method
TWI491579B (zh) * 2010-12-21 2015-07-11 潤弘精密工程事業股份有限公司 低鈣飛灰於常溫膠結方法
US9890082B2 (en) * 2012-04-27 2018-02-13 United States Gypsum Company Dimensionally stable geopolymer composition and method
KR101359929B1 (ko) * 2012-05-24 2014-02-18 한국건설기술연구원 강섬유 공급호퍼가 장착된 이동식 믹서를 이용한 터널 시공 방법 및 이를 이용한 터널구조물
US9919974B2 (en) * 2013-03-14 2018-03-20 The Catholic University Of America High-strength geopolymer composite cellular concrete
KR101575889B1 (ko) * 2014-01-24 2015-12-09 강원대학교산학협력단 기포 숏크리트를 이용한 연속철근 콘크리트포장 시공방법
DE102015204263A1 (de) * 2015-03-10 2016-09-15 Wacker Chemie Ag Verfahren zur Herstellung von pulverförmigen Feststoffen aus Alkalisalzen von Silanolen
US9896379B2 (en) * 2015-05-06 2018-02-20 En-Tech Corporation System and method for making and applying a non-portland cement-based material

Also Published As

Publication number Publication date
SI3535226T1 (sl) 2023-06-30
JP2021181402A (ja) 2021-11-25
DK3535226T3 (da) 2023-04-11
JP7616965B2 (ja) 2025-01-17
NZ753356A (en) 2024-04-26
AU2016428605A1 (en) 2019-05-30
NZ781905A (en) 2024-07-26
JP2019532907A (ja) 2019-11-14
CA3042855A1 (en) 2018-05-11
RU2733365C1 (ru) 2020-10-01
CA3042855C (en) 2024-05-07
NZ781911A (en) 2024-07-26
SMT202300103T1 (it) 2023-05-12
ES2941671T3 (es) 2023-05-24
AU2016428605B2 (en) 2022-03-17
WO2018084858A1 (en) 2018-05-11
NZ781909A (en) 2024-07-26
FI3535226T3 (fi) 2023-04-06
EP3816132A1 (en) 2021-05-05
HUE061676T2 (hu) 2023-08-28
HRP20230320T1 (hr) 2023-05-26
RS64093B1 (sr) 2023-04-28
EP3535226A1 (en) 2019-09-11
CN110662725A (zh) 2020-01-07
EP3535226A4 (en) 2020-04-29
LT3535226T (lt) 2023-04-11
PL3535226T3 (pl) 2023-05-08
EP3535226B1 (en) 2023-01-04

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