EP4305002A1 - Mélange de béton léger - Google Patents

Mélange de béton léger

Info

Publication number
EP4305002A1
EP4305002A1 EP22708271.6A EP22708271A EP4305002A1 EP 4305002 A1 EP4305002 A1 EP 4305002A1 EP 22708271 A EP22708271 A EP 22708271A EP 4305002 A1 EP4305002 A1 EP 4305002A1
Authority
EP
European Patent Office
Prior art keywords
cement
additives
lightweight concrete
perlite
proportion
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.)
Pending
Application number
EP22708271.6A
Other languages
German (de)
English (en)
Inventor
Andreas WOLFTHALER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4305002A1 publication Critical patent/EP4305002A1/fr
Pending legal-status Critical Current

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
    • C04B28/02—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
    • 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
    • C04B14/14—Minerals of vulcanic origin
    • C04B14/18—Perlite
    • C04B14/185—Perlite expanded
    • 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

Definitions

  • the invention relates to a lightweight concrete mix containing vitrified, closed-cell, expanded perlite, cement and additives.
  • vitrified, closed-cell spheres made of expanded silica sand or expanded perlite.
  • vitrified, closed-cell spheres with a grain diameter of 0.2 to 2 mm are mixed homogeneously with a volume proportion of up to 95%, for example with cement, hydraulic lime as a softening binder, cellulose as an additive, air-entraining agent and chemical additives such as liquefiers or accelerators in order to to obtain a mortar mixture with a density of only 260 to 350 kg/m 3 .
  • the invention is therefore based on the object of specifying a lightweight concrete mixture which has a high compressive strength with a comparatively low bulk density and thus a low thermal conductivity.
  • the invention solves the problem in that the mixture contains 35 to 550 kg/m 3 vitrified, closed-cell, expanded perlite with a grain size D90 ⁇ 2 mm, 100 to 950 kg/m 3 cement, 5 up to 850 kg/m 3 of additives with a grain size D90 ⁇ 150 ⁇ m and up to 25 kg/m 3 of superplasticizer, with the sum of the proportions of cement and additives not exceeding 1350 kg/m 3 and the total sum of the proportions of cement, additives and vitrified perlite must not exceed 1550 kg/m 3 .
  • the vitrified, closed-cell, expanded perlite brings with it the advantageous prerequisites for the production of lightweight concrete, namely a comparatively high level of mechanical stability at a low density.
  • the mechanical stability of the perlite granules has the advantage that the lightweight concrete mixture according to the invention can be produced using conventional mixing equipment without having to fear that the perlite granules will be destroyed.
  • the prerequisite is that the grain size D90 is limited to a maximum value of 2 mm, whereby the mechanical stability of the perlite grain can be noticeably improved if perlite with a grain size D90 ⁇ 0.8 mm is used.
  • the closed, glazed surface of the perlite grain also reduces the water requirement, which not only affects the workability but also the compressive strength of a concrete mixture.
  • the vitrified, closed-cell, expanded perlite is embedded in a matrix of cement and additives with a particle size D90 ⁇ 150 pm.
  • the additives for example ground fly ash and pozzolanic additives such as microsilica, slag and rock flour made from quartz, calcium carbonate or basalt, serve to improve the packing density of the lightweight concrete and also replace part of the cement.
  • the particle size of the additives D90 must be ⁇ 150 ⁇ m, preferably ⁇ 60 ⁇ m.
  • Replacing part of the cement with additives can partially counteract the shrinkage of the concrete during hardening due to the lower proportion of cement.
  • the sum of the cement proportions and the proportions of additives must remain limited in order to ensure a corresponding gross density of the to achieve lightweight concrete.
  • 1350 kg/m 3 have been found to be the upper limit for the total proportion.
  • the proportion by weight of cement and additives increased by the proportion of perlite must also not exceed an upper limit, which can be set at 1550 kg/m 3 .
  • a superplasticizer preferably based on polycarboxylate ether, is generally required in order to obtain a lightweight concrete mixture that is easy to process despite the high proportion of fines.
  • additional lightweight fillers in particular expanded glass or expanded clay, with a grain size D90 ⁇ 5 mm must be added to the concrete mixture if self-compacting properties are to be ensured.
  • the proportion of additional lightweight fillers should not exceed 350 kg/m 3 .
  • the compressive strength was determined on cubes with a side length of 10 cm that were stored dry in room air.
  • 192.1 kg/m 3 of a perlite according to example 2 are mixed with 525.5 kg/m 3 of cement according to example 1, with 367.8 kg/m 3 of calcium carbonate with a particle size D90 ⁇ 20 m ⁇ ti as an additive and mixed with 3.5 kg / m 3 of a flow agent with the addition of 247.6 kg / m 3 of water.
  • 300 kg/m 3 of a perlite according to Example 1 are mixed with 709.5 kg/m 3 cement CEM I 52.5 R, with 49.7 kg/m 3 microsilica with a particle size D90 ⁇ 0.5 pm as an additive and with 5 1.1 kg/m 3 of a superplasticizer with the addition of 271.2 kg/m 3 of water.
  • 211.2 kg/m 3 of a perlite according to Example 2 are mixed with 671.1 kg/m 3 of cement according to Example 1, with 167.8 kg/m 3 of calcium carbonate with a particle size D90 ⁇ 150 ⁇ m as an additive and with 4.5 kg / m 3 of a flow agent with the addition of
  • additional lightweight fillers such as expanded glass or expanded clay, can be used to achieve dry bulk densities below 1000 kg/m 3 , with significant compressive strengths still being achievable, as the following example shows.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

L'invention concerne un mélange de béton léger qui contient de la perlite vitrifiée, à cellules fermées, expansée, du ciment et des additifs et qui est caractérisé en ce qu'il contient 35 à 550 kg/m³ de perlite vitrifiée, à cellules fermées, expansée présentant une grosseur de grain D90 < 2 mm, 100 à 950 kg/m³ de ciment, 50 à 850 kg/m³ d'additifs présentant une grosseur de grain D90 < 150 µm et jusqu'à 25 kg/m³ de plastifiant, la somme des quantités de ciment et d'additifs ne dépassant pas 1350 kg/m³ et la somme totale des quantités de ciment, d'additifs et de perlite vitrifiée ne dépassant pas 1550 kg/m³.
EP22708271.6A 2021-03-08 2022-02-02 Mélange de béton léger Pending EP4305002A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50163/2021A AT524128B1 (de) 2021-03-08 2021-03-08 Leichtbetonmischung
PCT/AT2022/060031 WO2022187877A1 (fr) 2021-03-08 2022-02-02 Mélange de béton léger

Publications (1)

Publication Number Publication Date
EP4305002A1 true EP4305002A1 (fr) 2024-01-17

Family

ID=80560766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22708271.6A Pending EP4305002A1 (fr) 2021-03-08 2022-02-02 Mélange de béton léger

Country Status (3)

Country Link
EP (1) EP4305002A1 (fr)
AT (1) AT524128B1 (fr)
WO (1) WO2022187877A1 (fr)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT291087B (de) * 1969-08-05 1971-06-25 Perlmooser Zementwerke Ag Zuschlagstoff für Konstruktionsleichtbeton od.dgl. und Verfahren zu dessen Herstellung
JP2825648B2 (ja) * 1989-05-22 1998-11-18 アドヴァンスド・コンクリート・テクノロジー・インコーポレイテッド 高強度構造用パーライトコンクリート
DE19844722A1 (de) * 1998-09-29 2000-03-30 Otavi Minen Ag Leichtmauermörtel
DE10028508A1 (de) * 2000-06-08 2001-12-13 Veit Dennert Kg Baustoffbetr Leichtbeton zur Herstellung von Mauersteinen, Wandelementen oder dergleichen
CN101255039A (zh) * 2008-04-03 2008-09-03 武汉昂泰科技有限公司 一种聚合物微球保温隔热砂浆
FR2943663B1 (fr) * 2009-03-25 2011-05-06 Lafarge Sa Beton a haute ou ultra haute performance
CH709866B1 (de) * 2014-07-11 2018-05-31 Adt Aero Daemm Technik Gmbh Mörtelmischung zur Wärmedämmung und/oder als Brandschutz sowie für universale Anwendungen sowie Verfahren zu ihrer Herstellung und Verwendung.
CH708688B1 (de) * 2013-10-14 2017-08-31 Adt Aero Dämm Technik Gmbh Stabiler Formkörper als Brandschutz und/oder Wärmedämmung und Leichtbauplatte mit einem solchen, Herstellverfahren und Verwendung davon sowie Bauwerk enthaltend einen stabilen Formkörper oder eine Leichtbauplatte.
CH709130B1 (de) * 2014-01-07 2017-11-30 Adt Aero Dämm Technik Gmbh Verfahren zum Verbessern der Wärmeisolation von bestehenden Bauwerken oder Neubauten und von Bausteinen mit Hohlräumen, sowie mit dem Verfahren behandelte Bausteine.
DE102015210921A1 (de) * 2015-06-15 2016-12-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Hochleistungsaerogelbeton
DE102015223376A1 (de) * 2015-11-26 2017-06-01 Dennert Poraver Gmbh Verfahren und Anlage zur Herstellung von mono- oder multizellulär expandierten Partikeln aus einem glasartigen oder keramischen Material
CN106116367A (zh) * 2016-07-01 2016-11-16 桂林健威科技发展有限公司 一种节能型钢结构集成房屋阻隔热桥的浆料
CH712693A2 (de) * 2016-07-14 2018-01-15 Adt Aero Dämm Technik Gmbh Mauerstein sowie damit erstelltes Mauerwerk.
CN109562997A (zh) * 2016-08-19 2019-04-02 瓦克化学股份公司 绝缘灰泥层或绝缘面板形式的多孔模制体
CN110294616A (zh) * 2019-05-31 2019-10-01 南京钢诺智能装备有限公司 一种建筑保温材料

Also Published As

Publication number Publication date
AT524128A4 (de) 2022-03-15
WO2022187877A1 (fr) 2022-09-15
AT524128B1 (de) 2022-03-15

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