EP4536609A1 - Procédé de préparation d'un additif pour un liant ou un matériau de construction, additif pour un liant ou un matériau de construction, et utilisation d'un mélange de sable et de sable désertique en tant qu'additif pour un liant ou un matériau de construction - Google Patents

Procédé de préparation d'un additif pour un liant ou un matériau de construction, additif pour un liant ou un matériau de construction, et utilisation d'un mélange de sable et de sable désertique en tant qu'additif pour un liant ou un matériau de construction

Info

Publication number
EP4536609A1
EP4536609A1 EP23734469.2A EP23734469A EP4536609A1 EP 4536609 A1 EP4536609 A1 EP 4536609A1 EP 23734469 A EP23734469 A EP 23734469A EP 4536609 A1 EP4536609 A1 EP 4536609A1
Authority
EP
European Patent Office
Prior art keywords
slate
additive
binder
desert sand
mixture
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
EP23734469.2A
Other languages
German (de)
English (en)
Inventor
Tilman Fritsch
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 EP4536609A1 publication Critical patent/EP4536609A1/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
    • 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
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients

Definitions

  • the invention relates to a method for producing an additive for a binder or a building material, an additive for a binder or a building material and a use of a mixture of slate and desert sand as an additive for a binder or a building material.
  • desert sand could not be used as a component of building materials in particular without reducing the quality, resilience and durability of the building material.
  • the object of the present invention is to overcome the disadvantages of the prior art.
  • a process for producing an additive for a binder or a building material comprising the following steps:
  • Grinding can be done in a suitable grinding device.
  • the process is particularly preferably the production of an additive for a building material.
  • the grinding can be done in such a way that slate and desert sand are simultaneously and jointly given the grinding device, ie a mill or the like. Alternatively, you can consider putting the slate into the grinding device first and adding the desert sand at a later time.
  • the slate can be used, for example, as gravel, grit, gravel, sand or flour, preferably with a coarse grain size such as gravel, chippings or gravel. It can also be considered that the slate to be ground is in particles that are larger than chippings and gravel, or that the slate to be ground is not in particulate form. If the slate is already ground before the desert sand is added, then at the time the desert sand is added there may already be slate particles such as gravel that are not several orders of magnitude larger than the desert sand particles, which can simplify grinding.
  • Another alternative is to grind the desert sand first and add the slate at a later time.
  • shale and desert sand are preferably ground together over a certain period of time.
  • the mixture is preferably a bulk material.
  • the mixture can contain other components in addition to slate and desert sand.
  • organic substances can be added. You may want to consider adding sea sand in addition to desert sand. Sea sand naturally contains components of dead sea plants and marine animals such as corals, which naturally contain carbon. Alternatively, instead of organic substances, it can be considered to add substances that contain a significant proportion of carbon, even if they cannot be described as organic substances from a chemical point of view.
  • the mixture can consist of slate, desert sand and sea sand.
  • the mixture can consist of shale, desert sand and a carbon source.
  • the mixture consists of slate and desert sand, and therefore does not contain any other components in addition to the aforementioned two components.
  • the mixture preferably does not contain any binder, which causes the components of the mixture to stick or clump together. This does not contradict the use of the mixture as a component of a binder such as cement.
  • the mixture is preferably used in cement or the like in order to later be part of a building material to which the cement or the like has been added as a binder.
  • the mixture according to the exemplary embodiments of the present invention is therefore particularly preferably used in building materials.
  • such a building material can include at least one additive and at least one binder.
  • concrete can be considered, which, in addition to the above-described mixture, includes an aggregate that is common in concrete production and cement as a binder.
  • the building material, in particular concrete can include other components that are intended, for example, to improve its properties.
  • the building material, in particular concrete consists of the above-described mixture, an additive and a binder, for example cement, and therefore does not include any further components.
  • the method for producing the additive according to the aforementioned exemplary embodiments only includes the grinding of the components described, but no further steps such as the production of larger ones Particles from the ground components, the process is particularly easy to carry out, environmentally friendly and inexpensive. These advantages are also achieved by the fact that no toxic binders are used, which cause the above-described jointly ground components to stick, clump together or the like.
  • Desert sand usually consists predominantly of silicon dioxide.
  • slate has a basic effect.
  • silicate compounds can form. This happens either through the alkaline effect of the slate, especially its alkaline components, or in another way.
  • the crushing of slate and sand during the grinding process as well as any surface changes that occur make the mixture an advantageous additive for the production of binders and in particular building materials such as cement, lime, pozzolana, concrete, plaster or mortar.
  • the mixture is particularly preferably used for building materials such as concrete, plaster or mortar.
  • the surface changes, for example greater roughness, and silicate compounds that form on the surface can ensure that the mixture containing jointly ground slate and desert sand clumps together after grinding to form larger particles, which are advantageous when setting the building material in which the mixture is used can be.
  • Such clumped particles can also improve the mechanical properties of the hardened building material, i.e. a component made from the building material.
  • the mixture can also have a beneficial effect on the properties of the building material and components made from it even without such clumping. It should be mentioned that in the past it was often assumed that sand, and especially desert sand, was fundamentally unsuitable for the production of building materials because of its low roughness and very small grain size as well as its grain size distribution without larger grains.
  • the surface enlargement of desert sand and slate caused by grinding can also cause alkaline components of the slate to react with the silicon dioxide of the desert sand to form silicate hydrates. This can happen during the setting or during the post-hardening of a component made from the building material, for example concrete, which sometimes lasts for years.
  • the grinding process makes a larger surface area of the desert sand and slate available, so that both the alkaline components of the slate and the silicon dioxide of the desert sand can more easily and frequently contact each other as reactants on the respective surfaces.
  • the proportion of slate and desert sand in the mixture can each be at least 20%.
  • the proportion of slate is at least 20%. It can be at least 30%, at least 40%, at least 50% and up to 80%.
  • the proportion of desert sand is at least 20%. It can be at least 30%, at least 40%, at least 50% and up to 80%.
  • the mixture can consist of 20% slate and 80% desert sand.
  • the mixture can consist of 30% slate and 70% desert sand.
  • the mixture can consist of 40% slate and 60% desert sand.
  • the mixture can consist of 50% slate and 50% desert sand.
  • the mixture can consist of 60% slate and 40% desert sand.
  • the mixture can consist of 70% slate and 30% desert sand.
  • the mixture can consist of 80% slate and 20% desert sand.
  • the mixture includes other components in addition to slate and desert sand, it still preferably contains at least 20% slate and at least 20% desert sand.
  • the desert sand contained in the mixture can be ground to a grain size of 0.5 mm or smaller.
  • the desert sand is ground to a grain size of a maximum of 0.25 mm, a maximum of 0.1 mm, a maximum of 0.75 mm, a maximum of 0.05 mm or a maximum of 0.04 mm.
  • Bulk materials with a grain size of less than 0.063 mm are usually no longer referred to as sand, but rather as flour.
  • the present invention therefore also includes embodiments in which slate is ground into slate powder and/or desert sand into corresponding flour.
  • the grinding process can be carried out in such a way that the maximum grain sizes mentioned above for desert sand also apply to the slate. Alternatively, it can be considered to carry out the procedure in such a way that larger Slate particles result. This can be done, for example, by varying the grinding time.
  • a degree of grinding in a second grinding step is finer than that in a first grinding step.
  • the method can also include more than two grinding steps, with the degree of grinding of each grinding step preferably being finer than the degree of grinding of the previous grinding step.
  • the present invention further comprises an additive for a binder or a building material, the additive comprising slate and desert sand which have been ground together. All details and details explained with regard to the method described above also apply to the exemplary embodiments of the additive and vice versa.
  • the present invention further comprises a building material or a binder comprising an embodiment of the additive described above.
  • the building material can be selected from a group consisting of concrete, mortar and plaster.
  • the binder can be selected from the group of cement, lime and pozzolans.
  • the present invention further includes a use of a mixture of co-ground slate and desert sand as an additive for a binder or a building material.
  • the present invention further includes an additive for a binder or a building material obtained by a method as described above.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne un procédé de préparation d'un additif pour un liant ou un matériau de construction, le procédé étant destiné à comprendre les étapes suivantes : - le broyage d'un mélange contenant de l'ardoise et du sable désertique.
EP23734469.2A 2022-06-07 2023-06-07 Procédé de préparation d'un additif pour un liant ou un matériau de construction, additif pour un liant ou un matériau de construction, et utilisation d'un mélange de sable et de sable désertique en tant qu'additif pour un liant ou un matériau de construction Pending EP4536609A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022114264.7A DE102022114264A1 (de) 2022-06-07 2022-06-07 Verfahren zur Herstellung eines Additivs für ein Bindemittel oder einen Baustoff, Additiv für ein Bindemittel oder einen Baustoff sowie Verwendung eines Gemisches aus Schiefer und Wüstensand als Additiv für ein Bindemittel oder einen Baustoff
PCT/EP2023/065161 WO2023237573A1 (fr) 2022-06-07 2023-06-07 Procédé de préparation d'un additif pour un liant ou un matériau de construction, additif pour un liant ou un matériau de construction, et utilisation d'un mélange de sable et de sable désertique en tant qu'additif pour un liant ou un matériau de construction

Publications (1)

Publication Number Publication Date
EP4536609A1 true EP4536609A1 (fr) 2025-04-16

Family

ID=87035962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23734469.2A Pending EP4536609A1 (fr) 2022-06-07 2023-06-07 Procédé de préparation d'un additif pour un liant ou un matériau de construction, additif pour un liant ou un matériau de construction, et utilisation d'un mélange de sable et de sable désertique en tant qu'additif pour un liant ou un matériau de construction

Country Status (4)

Country Link
EP (1) EP4536609A1 (fr)
CN (1) CN119522204A (fr)
DE (1) DE102022114264A1 (fr)
WO (1) WO2023237573A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1078723A (en) * 1964-06-25 1967-08-09 British Ceramic Res Ass Improvements relating to grouting preparations based on epoxy resins
RU2049079C1 (ru) * 1992-12-30 1995-11-27 Научно-исследовательский, проектно-конструкторский и технологический институт бетона и железобетона Расширяющая добавка к портландцементу
DE102017102225B3 (de) * 2016-04-11 2017-09-07 Khd Humboldt Wedag Gmbh Verwendung von behandeltem Wüstensand als Zuschlagstoff für Beton, Verfahren zu seiner Herstellung und Wüstensand als Zuschlagstoff

Also Published As

Publication number Publication date
CN119522204A (zh) 2025-02-25
WO2023237573A1 (fr) 2023-12-14
DE102022114264A1 (de) 2023-12-07

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