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WO2019162916A1 - Produit préfabriqué de béton vibro-comprimé - Google Patents

Produit préfabriqué de béton vibro-comprimé Download PDF

Info

Publication number
WO2019162916A1
WO2019162916A1 PCT/IB2019/051500 IB2019051500W WO2019162916A1 WO 2019162916 A1 WO2019162916 A1 WO 2019162916A1 IB 2019051500 W IB2019051500 W IB 2019051500W WO 2019162916 A1 WO2019162916 A1 WO 2019162916A1
Authority
WO
WIPO (PCT)
Prior art keywords
mixture
product
concrete
glass
photo
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.)
Ceased
Application number
PCT/IB2019/051500
Other languages
English (en)
Inventor
Massimo SENINI
Giorgia SENINI
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
Priority to EP19713200.4A priority Critical patent/EP3755676A1/fr
Publication of WO2019162916A1 publication Critical patent/WO2019162916A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • C04B40/0067—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of vibrations
    • 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
    • C04B40/0071—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of a rise in pressure
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C5/00—Pavings made of prefabricated single units
    • E01C5/06—Pavings made of prefabricated single units made of units with cement or like binders
    • E01C5/065—Pavings made of prefabricated single units made of units with cement or like binders characterised by their structure or component materials, e.g. concrete layers of different structure, special additives

Definitions

  • the present invention relates to products for construction, in particular prefabricated products of concrete.
  • Such products are usually produced by molding the concrete in special molds using vibrating presses. They can be composed in their entirety of a single homogeneous concrete mixture. In this case, they are called “single-layer” products. Alternatively, they can be composed of two different concrete mixtures. In this case, they are called“double-layer” products.
  • the two concrete mixtures differ from each other in their so-called mix design.
  • the mix design is obtained by dosing different aggregates with specific particle size curves and with the addition of a suitable cement binder, e.g. type II/ A-L 42.5 cement and/or lime.
  • a lighting system however entails additional time and costs in the installation phase, and high costs for the supply of electricity for the entire operating life of the system.
  • the object of the present invention is therefore to overcome the drawbacks highlighted above in relation to the background art.
  • one aim of the present invention is to make available prefabricated concrete products that help solve the problem of visibility in low light conditions, which increase the safety of the products and which limit energy consumption.
  • FIG. 1 shows schematically an embodiment of a prefabricated concrete product according to the invention.
  • FIG. 2 schematically shows another embodiment of a prefabricated concrete product according to the invention.
  • the invention relates to a prefabricated product 10 of vibro-compressed concrete for construction works.
  • the product 10 comprises an outer portion 12 made of a first concrete mixture and having an outer surface 14 intended, in use, to be exposed to sight.
  • the first mixture comprises fragments 16 of glass comprising photoluminescent pigments.
  • first concrete mixture fragments 16 of glass are dispersed, in quantities ranging from 0.1% to 10% by weight, preferably between 3% and 5% by weight of the total of the first mixture.
  • the fragments 16 of glass preferably have an average particle size of about 1-10 mm, preferably of about 3-6 mm.
  • the photo-luminescent pigments present in the glass are able to absorb a portion of the light radiation to which they are exposed (typically ultraviolet radiation) and then, themselves, emit a slight light radiation when the external radiation fails.
  • Different types of pigments are known, capable of emitting light of different colors such as e.g. yellow, green, blue and orange.
  • the outer surface 14 of the outer portion 12 of the product 10 is intended, during the correct use of the product 10, to be exposed to the users’ sight.
  • the outer surface 14 is the walk-on surface.
  • the product 10 according to the invention further comprises an inner portion 22 made of a second concrete mixture different from the first mixture.
  • the outer portion 12 comprises an outer surface 14 intended, in use, to be exposed to sight
  • the inner portion 22 comprises an inner surface 24 intended, in use, to be placed against a support structure.
  • the inner surface 24 is that which is placed on the substrate during installation and which therefore remains covered during the entire operating life of the product 10.
  • the inner surface 24 is that which is placed against the wall to be covered and/or to the support structure, while the outer surface 14 is the opposite one.
  • the product 10 comprises an inner portion 22 made of a second mixture
  • the latter represents a sort of core which can be almost completely covered by the outer portion 12.
  • the two concrete mixtures differ from each other.
  • the two mixtures may also differ as regards one or more of the other components of the concrete.
  • concrete comprises aggregates, a cement binder, e.g. cement type II/A-L 42,5 or lime, and one or more additives.
  • a cement binder e.g. cement type II/A-L 42,5 or lime
  • additives e.g. cement type II/A-L 42,5 or lime
  • the two mixtures may differ from each other also for one or more of these elements.
  • the second mixture which originates the inner surface 24 and is therefore not exposed to sight during the operating life of the product 10, may comprise aggregates of a higher particle size and lower quality, which give it a less refined appearance compared to the first mixture.
  • the first mixture may also comprise a photo-catalytic cement, known in itself. When exposed to sunlight or ultraviolet radiation, this cement is able to accelerate the natural oxidation processes of pollutants and their degradation into non-toxic and non -harmful substances.
  • the outer surface 14 of the first mixture is exposed to sight, it may also be exposed to ultraviolet radiation (whether solar and/or artificial), which supports the operation of the photo-catalytic cement very well.
  • a photo-catalytic cement adapted to be used in the product 10 according to the invention is e.g. Tx Active® cement marketed by Italcementi S.p.A.
  • the first mixture can also comprise quartz aggregates.
  • the hardness of the quartz in fact strongly limits floor wear, even in the case of intense use.
  • fragments 16 of photo-luminescent glass are also characterized by high hardness, which makes them equally suitable for this type of use.
  • photo-luminescent materials such as e.g. resins and polymers, are known, but are not adapted to be used in products according to the invention because they cannot adequately withstand wear.
  • concrete mixtures also comprise aggregates that make up a large part of the mixture itself in volume.
  • these aggregates are made of sand and/or gravel and represent about 70-80% by weight of the entire mixture.
  • the first mixture and/or the second mixture may comprise expanded clay and/or pumice and/or expanded glass.
  • expanded clay and/or pumice and/or expanded glass therefore makes it possible to obtain a lighter concrete mixture.
  • ordinary concrete has a density of about 2200 kg/m3
  • concrete comprising expanded clay and/or pumice and/or expanded glass can reach a density of between 1000 and 1600 kg/m3.
  • the first mixture and/or the second mixture comprise mineralized hemp.
  • Mineralized hemp is obtained by treating the woody part of useful hemp or fiber hemp plants (cannabis sativa).
  • hemp core This woody part, called hemp core, is treated with lime until it is completely mineralized.
  • the lime used in this process is mostly hydrated lime, i.e. calcium hydroxide or Ca(OH)2 and a small amount of quicklime, i.e. calcium oxide or CaO.
  • the fibrous material obtained in this way can replace or join the other aggregates in the concrete mixture, introducing some specific advantages.
  • Hemp (as well as pumice, expanded clay and expanded glass) is also rather light and has excellent insulating properties.
  • hemp is a renewable resource and has the particularity of having a negative balance in terms of CO 2 .
  • hemp plants absorb CO 2 from the atmosphere and use it to build their own structure.
  • the structure of the hemp core stabilizes and retains its carbon for an indefinite time.
  • the outer surface 14 of the outer portion 12 of the product 10 according to the invention may comprise one or more of the surface finishes out of those suitable for this kind of product.
  • Such surface finishes may, for example, be those already used for the treatment of natural or artificial stones intended for similar uses.
  • Some finishes such as polishing and smoothening, guarantee a smooth and uniform surface with low roughness, adapted to be used in civil environments where, for example, pedestrians, pushchairs, hand trolleys, bicycles or the like have to transit.
  • finishes such as hammering, shot-peening, chiseling and bush-hammering, guarantee a very rough, coarse and harsh surface, adapted to be used in industrial environments where, for example, motorized trucks, motor vehicles or the like have to transit, or for walls requiring a rustic finish.
  • finishes such as brushing and sandblasting which ensure a surface with intermediate roughness.
  • the same surface of the same product 10 may comprise areas with different finishes, e.g., in order to create aesthetic effects.
  • figure 1 shows a solid piece 10 according to the invention, comprising a single portion made of a first mixture of concrete and having an outer surface 14 intended, during use, to be exposed to sight.
  • the first mixture comprises fragments 16 of glass comprising photo- luminescent pigments.
  • This embodiment which has the well-known single-layer structure, is simple to create and has the advantage of exposing the photo-luminescent fragments 16 on all the side faces of the solid piece 10.
  • One drawback of this embodiment is that it requires a large amount of photo- luminescent fragments 16, many of which remain inside the mixture and are not at all exposed to sight.
  • Figure 2 shows a solid piece 10 according to the invention, comprising an outer portion 12 and an inner portion 22.
  • the outer portion 12 is made with a first concrete mixture and has an outer surface 14 intended, in use, to be exposed to sight.
  • the first mixture comprises fragments 16 of glass comprising photo- luminescent pigments.
  • the inner portion 22, on the other hand, is made with a second concrete mixture and has an inner surface 24 intended, in use, to be placed next to a support structure.
  • the thickness sl of the outer portion 12 represents a minimum part of the overall thickness st.
  • This embodiment which incorporates the known double-layer structure, is more complex to be made and has the drawback of exposing the photo-luminescent fragments 16 on only one face of the solid piece.
  • the invention relates to a method for producing a prefabricated concrete product 10.
  • the method according to the invention comprises the phases of:
  • At least one aggregate at least one aggregate, a cement binder, water, and fragments 16 of glass comprising photo-luminescent pigments;
  • dosing water in a percentage comprised between 4% and 8% by weight; mixing the dosed components so as to obtain a first mixture; amalgamating the first mixture so as to make it uniform;
  • the phases of removing the product 10 from the mold and waiting for the curing of the first mixture, if necessary, can be carried out in reverse order, i.e. letting the mixture cure in the mold and then removing it once it has cured.
  • the method according to the invention may also comprise other phases, to be carried out independently of those described above.
  • the method may comprise the phases of:
  • dosing water in a percentage comprised between 2% and 5% by weight; mixing the dosed components so as to obtain a second mixture;
  • the first and the second mixture can be placed in the same mold.
  • the second mixture is placed in the mold, the combined action of vibro-compression is applied for the first time, the first mixture is placed on top of the second mixture, and the combined action of vibro-compression is then applied for the second time.
  • a product 10 comprising an outer portion 12 made with the first mixture and an inner portion 22 made with the second mixture.
  • the method also comprises the phase of also preparing a photo-catalytic cement and/or quartz aggregates in the first mixture.
  • the method also comprises one or more of the following phases:
  • the at least one aggregate prepared with the method according to the invention may comprise one or more out of pumice, expanded clay, expanded glass, mineralized hemp.
  • the method further comprises, after the phase of removing the product 10 from the mold, the phases of treating an outer surface 14 made with the first mixture by one or more of the following treatments: polishing, smoothening, brushing, sandblasting, hammering, shot- peening, chiseling, bush-hammering.
  • the present invention provides a product 10 on the outer surface 14 of which are provided photo-luminescent fragments 16.
  • fragments 16 are able to store light energy while they are exposed to external light radiation (typically solar radiation) and then release their own light radiation when the external one fails.
  • external light radiation typically solar radiation
  • the invention therefore helps to solve the problem of visibility in poor lighting conditions, increases the safety of the products and limits the consumption of energy.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Road Paving Structures (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un produit préfabriqué (10) de béton vibro-comprimé pour des travaux de construction qui comprend une partie externe (12) constituée d'un premier mélange de bétons et comportant une surface externe (14) destinée, lors de l'utilisation, à être exposée à la vue, le premier mélange comprenant des fragments (16) de verre comprenant des pigments photo-luminescents.
PCT/IB2019/051500 2018-02-23 2019-02-25 Produit préfabriqué de béton vibro-comprimé Ceased WO2019162916A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19713200.4A EP3755676A1 (fr) 2018-02-23 2019-02-25 Produit préfabriqué de béton vibro-comprimé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000003011A IT201800003011A1 (it) 2018-02-23 2018-02-23 Manufatto prefabbricato in calcestruzzo vibrocompresso
IT102018000003011 2018-02-23

Publications (1)

Publication Number Publication Date
WO2019162916A1 true WO2019162916A1 (fr) 2019-08-29

Family

ID=62167814

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/051500 Ceased WO2019162916A1 (fr) 2018-02-23 2019-02-25 Produit préfabriqué de béton vibro-comprimé

Country Status (3)

Country Link
EP (1) EP3755676A1 (fr)
IT (1) IT201800003011A1 (fr)
WO (1) WO2019162916A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024095055A1 (fr) * 2022-10-31 2024-05-10 Greennovations Srl Conglomérats bitumineux contenant un additif à base de fibres de canapulo de chanvre

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200936A (en) * 1987-02-11 1988-08-17 Frederick Richard Jones Reflective kerbstone
DE3809937A1 (de) * 1988-03-24 1989-10-05 Sf Vollverbundstein Verfahren zur herstellung von baustoffen mit farbgebenden eigenschaften
GB2297575A (en) * 1995-02-04 1996-08-07 S & J Loach Limited Reflective block and method of manufacture
EP1431014A2 (fr) * 2002-12-20 2004-06-23 Valle Francesco S.r.L. Procédé de fabrication d'éléments modulaires réfracteurs et éléments modulaires réfracteurs ainsi obtenus
US20070234679A1 (en) * 2004-12-24 2007-10-11 Hans-Josef Metten Method for Fabricating Concrete Blocks or Concrete Slabs
WO2010134805A1 (fr) * 2009-05-18 2010-11-25 Next Generation B.V. Béton émetteur de lumière comprenant un pigment photoluminescent contenant des particules de verre
US9114422B1 (en) * 2014-04-17 2015-08-25 Alaa Toma Paving block with embedded photoluminescent material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2331169B1 (es) * 2008-12-10 2010-09-17 Pavimentos De Tudela, S.L Losa para pavimentos y procedimiento de obtenicion de la misma.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200936A (en) * 1987-02-11 1988-08-17 Frederick Richard Jones Reflective kerbstone
DE3809937A1 (de) * 1988-03-24 1989-10-05 Sf Vollverbundstein Verfahren zur herstellung von baustoffen mit farbgebenden eigenschaften
GB2297575A (en) * 1995-02-04 1996-08-07 S & J Loach Limited Reflective block and method of manufacture
EP1431014A2 (fr) * 2002-12-20 2004-06-23 Valle Francesco S.r.L. Procédé de fabrication d'éléments modulaires réfracteurs et éléments modulaires réfracteurs ainsi obtenus
US20070234679A1 (en) * 2004-12-24 2007-10-11 Hans-Josef Metten Method for Fabricating Concrete Blocks or Concrete Slabs
WO2010134805A1 (fr) * 2009-05-18 2010-11-25 Next Generation B.V. Béton émetteur de lumière comprenant un pigment photoluminescent contenant des particules de verre
US9114422B1 (en) * 2014-04-17 2015-08-25 Alaa Toma Paving block with embedded photoluminescent material

Also Published As

Publication number Publication date
IT201800003011A1 (it) 2019-08-23
EP3755676A1 (fr) 2020-12-30

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