EP2041046A1 - Procédé de consolidation de blocs de pierre naturels pour sciage ultérieur - Google Patents

Procédé de consolidation de blocs de pierre naturels pour sciage ultérieur

Info

Publication number
EP2041046A1
EP2041046A1 EP07790152A EP07790152A EP2041046A1 EP 2041046 A1 EP2041046 A1 EP 2041046A1 EP 07790152 A EP07790152 A EP 07790152A EP 07790152 A EP07790152 A EP 07790152A EP 2041046 A1 EP2041046 A1 EP 2041046A1
Authority
EP
European Patent Office
Prior art keywords
resin
face
layer
block
faces
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.)
Withdrawn
Application number
EP07790152A
Other languages
German (de)
English (en)
Inventor
Mirio Brozzi
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.)
Duna-Corradini Srl
Original Assignee
Duna-Corradini Srl
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 Duna-Corradini Srl filed Critical Duna-Corradini Srl
Publication of EP2041046A1 publication Critical patent/EP2041046A1/fr
Withdrawn legal-status Critical Current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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • C04B41/4853—Epoxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/005—Cutting sheet laminae in planes between faces
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • C04B41/488—Other macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
    • C04B41/4884—Polyurethanes; Polyisocyanates

Definitions

  • the present invention relates to a method for consolidating natural stone blocks, particularly marble and granite, for subsequent sawing. Background art
  • the cutting of natural stone blocks in order to obtain slabs of various thicknesses generally entails, during cutting, the breakage or at least fraying of the slabs. This has created the need to provide methods aimed at consolidating the blocks to be sawed, in order to avoid or at least reduce the waste of material caused by cutting.
  • the first type i.e., consolation with mat and resin
  • the first type provides for the application of a bidirectional fiberglass mat on the faces of the block to be cut, which is subsequently impregnated with epoxy resin (500 g of resin are required for every 500 g of mat).
  • the second type which provides for the consolation of the blocks with marble plates and mastic, is considered the most archaic method among known ones and consists in fixing pieces of waste marble slabs to the block to be cut, by using large amounts of polyester mastic.
  • the lack of regularity of the profiles of the blocks to be cut and the fact that the marble slabs used originate from work waste constitute a complication in performing the described method.
  • the third type of consolidation is the one currently most widely used and consists in providing, by using mastics or putties, a frame made of wood or plywood around the block to be cut, so as to form a sort of containment cage inside which resin and inert materials of various sizes are poured, obtaining, at the end of the process, an almost regular profile of the block.
  • the aim of the present invention is to provide a method for consolidating natural stone blocks for subsequent sawing which allows to reduce significantly the time required to secure the blocks before sawing them, ensuring optimum effectiveness of the treatment.
  • an object of the invention is to provide a method which is easy to perform and safe in operation.
  • Another object of the invention is to provide a method which entails a modest use of auxiliary materials, consequently reducing the application costs.
  • Another object of the present invention is to allow easy and safe transport of the natural stone slabs obtained by sawing.
  • Another object of the invention is to provide a method which allows to reduce the waste material caused by its execution.
  • the present method for consolidating natural stone blocks to be subjected to subsequent sawing along at least one predefined cutting plane characterized in that it comprises the step that consists in applying at least one layer of polymeric resin to at least one face of a block to be cut which is intersected by said cutting plane.
  • Figure 1 is a perspective view of the step of application of the layer of polymeric resin to the lateral faces of the natural stone block;
  • Figure 2 is a top plan view of the natural stone block after the application of the polymeric resin;
  • Figure 3 is a perspective view of the step of distribution of polymeric resin on the upper face of the natural stone block
  • Figure 4 is a sectional front elevation view of the natural stone block after the application of partial vacuum and the distribution of polymeric resin on the upper face of the block;
  • Figure 5 is a sectional front elevation view of the natural stone block after the application of the partial vacuum and the distribution of pressurized polymeric resin on the upper face of the block;
  • Figure 6 is a perspective view of the natural stone block and of the slabs obtained by sawing. Ways of carrying out the invention
  • the reference numeral 1 generally designates a natural stone block, having a substantially parallelepipedal shape, which is to be sawed.
  • the geometry of the block 1 can be rather irregular but substantially similar to a parallelepiped.
  • the method according to the invention provides for the application, preferably by spraying, for example through one or more nozzles 2, of at least one layer 3 of polymeric resin on one or more faces 11 of the block 1 which are intersected by predefined cutting planes 4, for example 4a and 4b, which are adapted to adhere to said faces for consolidation of the block 1.
  • application of the layer 3 occurs continuously so as to define a uniform coating of the faces 11.
  • application of the layer 3 may occur discontinuously, for example by forming a plurality of strips which are perpendicular to the cutting planes 4.
  • the layer 3 must be applied to all the faces 11 intersected by the cutting planes 4, so as to form a sort of frame of said block and of the slabs obtained from it by sawing.
  • the layer 3 thus applied enters the cracks and fissures that may be present on the surfaces of application, thus also penetrating into the block 1 so as to optimize its consolidation.
  • the duration of the step of application of the layer 3 is a function of the thickness to be obtained, which varies depending on the characteristics of the material that constitutes the block 1, on the defects that are present on the surfaces to be treated, and on the type of resin used.
  • the layer 3 can be obtained in one or more passes.
  • the polymeric resin used is preferably of the thermosetting type, for example a compact or expanded polyurethane or epoxy resin.
  • the thickness of the layer 3 is comprised generally between 3 and 10 mm, whereas for expanded polyurethane resins it can vary between 15 and 30 mm.
  • the resulting layer 3 begins to harden so that it sets on the faces 11 ;
  • the duration of the hardening step is a function not only of the thickness of the resulting layer 3 but also of the type of resin used and of the environmental conditions.
  • the duration of the hardening step can vary from 1-2 minutes to 1-2 hours.
  • first and second faces 15 and 16 are substantially parallel to the cutting plane 4 and are mutually opposite.
  • the resin 6 is preferably of the epoxy type, but it may also be of the polyurethane type or of another type.
  • the first and second faces, respectively 15 and 16 are not associated with the layer 3 and the step for distributing the resin 6, performed by spraying for example with the aid of a nozzle 2 or by pouring, occurs in discrete quantities at the fissures which can be detected on the second face 16 so as to avoid waste, but it might also be distributed continuously so as to cover the second face 16.
  • the impermeabilizing effect caused by the application of the layer 3 to the faces 11 allows to optimize the penetration of the resin 6 applied to the second face 16 within the block 1, since the faces 11 are isolated from the outside environment and therefore no dispersions occur.
  • the block 1 preferably rests at the first face 15, so as to also use gravity, in addition to the drawing action described above, to facilitate the penetration of the resin 6.
  • the amount of resin 6 to be distributed on the second face 16 varies substantially as a function of the defects of the block 1 which emerge at said face and are possibly connected to internal defects, and as a function of the characteristics of the material and of the type of resin used.
  • the step of distributing an amount of resin 6 is performed under pressure, in order to improve its penetration into the block 1 and optimize its consumption.
  • distribution of the resin 6 is performed by using at least one dispensing device 30, which is connected to a pump and is arranged at a first region of the second face 16 which is not associated with the layer 3 and is conveniently chosen depending on the concentration and extent of the fissures that are visible externally.
  • the dispensing device 30 comprises at least one branch 31 which is adapted to distribute an amount of resin also at a second region of the second face 16, which is also not associated with the layer 3, in order to reach simultaneously the most critical areas.
  • Application of a partial vacuum at the first face 15, conveniently performed simultaneously with the distribution of the resin 6, is performed by arranging at least one vacuum pump 32 at at least one portion of the first face 15 which is not associated with the layer 3.
  • at least one of the first and second faces 15 and 16, preferably both, is associated with the layer 3 of resin.
  • the layer 3 is applied to all the faces of the block 1 and in practice covers it.
  • the application of the layer of resin 3 to the first and/or second faces 15 and 16 occurs respectively after the arrangement of the dispensing device 30 and/or of the vacuum pump 32.
  • the application of partial vacuum at the first face 15 and the distribution of resin 6 at the second face 16 are performed after the application of the layers 3.
  • the block 1 does not have areas which can be accessed from the outside and the layers 3 deposited on all the faces of the block 1 have a containment effect which increases the effectiveness of the partial vacuum applied at the first face 15 and of the pressure with which the resin
  • the method according to the invention achieves the intended aim and objects, since it allows to perform consolidation of the block to be sawed by applying a layer of resin to the faces affected by the cutting action, reducing the time required for its execution and the use of auxiliary materials.
  • the execution times of the method according to the invention are on the order of magnitude of a few hours, increasing productivity significantly with respect to known methods.

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)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Revetment (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

L'invention concerne un procédé de consolidation de blocs de pirerre naturels, en particuler de marbre ou de granit, soumis à un sciage ultérieur. Ledit procédé est basé sur l'application, sur au moins une face (11) du bloc à consolider qui est coupé par au moins un plan de coupe (4) prédéfini, d'au moins une couche (3) de résine polymère conçue pour adhérer à ladite face afin de consolider le bloc avant des opérations de coupe.
EP07790152A 2006-07-03 2007-06-14 Procédé de consolidation de blocs de pierre naturels pour sciage ultérieur Withdrawn EP2041046A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO20060216 ITMO20060216A1 (it) 2006-07-03 2006-07-03 Procedimento per il consolidamento di blocchi di pietra naturale da sottoporre a successiva segagione
PCT/IT2007/000420 WO2008004262A1 (fr) 2006-07-03 2007-06-14 Procédé de consolidation de blocs de pierre naturels pour sciage ultérieur

Publications (1)

Publication Number Publication Date
EP2041046A1 true EP2041046A1 (fr) 2009-04-01

Family

ID=38573226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07790152A Withdrawn EP2041046A1 (fr) 2006-07-03 2007-06-14 Procédé de consolidation de blocs de pierre naturels pour sciage ultérieur

Country Status (3)

Country Link
EP (1) EP2041046A1 (fr)
IT (1) ITMO20060216A1 (fr)
WO (1) WO2008004262A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVR20070054A1 (it) * 2007-04-12 2008-10-13 Aros Srl Procedimento per il consolidamento di blocchi o lastre di materiali da costruzione
ITVR20080053A1 (it) * 2008-04-30 2009-11-01 Aros Srl Procedimento per il consolidamento di blocchi o lastre di materiale lapideo
CN103821517A (zh) * 2014-01-14 2014-05-28 湖南柯盛新材料有限公司 一种大理石开采中条形块石灌注加固方法
ES2648537B2 (es) * 2016-06-29 2018-06-11 Marie Michele Naies Procedimiento para reforzar una pieza de piedra natural, mineral o sintética

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1027222B (it) * 1974-12-31 1978-11-20 Marocco Giuseppe Procedimento ed apparecchiatura per consolidare blocchi di marmo e simili pietre naturali
IT1225588B (it) * 1988-09-14 1990-11-22 Toncelli Dario A Procedimento per l'impregnazione sottovuoto con resine di lastre di marmo o materiali lapidei in genere fessurati e apparecchiatura per larealizzazione dello stesso
ES2190332B1 (es) * 2001-04-04 2004-09-01 Politek-Plant, S.L. Procedimiento para la diseccion milimetrica de marmol, piedras o materiales similares.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008004262A1 *

Also Published As

Publication number Publication date
WO2008004262A1 (fr) 2008-01-10
ITMO20060216A1 (it) 2008-01-04

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