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
  • 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
  • C04B18/30—Mixed waste; Waste of undefined composition
  • C04B18/305—Municipal waste
• • 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
  • C04B14/06—Quartz; Sand
• • 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
  • C04B18/02—Agglomerated materials, e.g. artificial aggregates
  • C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
• • 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
  • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
  • C04B20/10—Coating or impregnating
  • C04B20/1055—Coating or impregnating with inorganic materials
  • C04B20/1077—Cements, e.g. 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
  • C04B28/02—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
  • 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
  • C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
• • 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 present invention relates to the field of building and public works (BTP) and, more particularly, materials of the aggregate type which enter into the composition of construction materials.
• aggregates are fragments of rock intended to enter into the composition of the materials necessary for the manufacture of public works, civil engineering and building works.
• wastes such as bottom ash, kaolin sands, waste rock, crushed concrete, etc. have already been used.
• the present invention aims to provide aggregates which incorporate waste, such as household waste, organic waste, industrial waste, waste from sludge and sediment, thus responding to the problem of waste treatment, while having mechanical characteristics. and appropriate physicochemicals in the building, public works and civil engineering works sector, in particular by meeting the current standard in this sector.
• the present invention therefore firstly relates to basic grains intended to be assembled together to form granules intended to enter into the composition of construction materials useful in the field of building, public works and civil engineering, characterized in that they each consist of a core formed of an agglomerate of compressed waste fragments and associated with each other by a micro-concrete with carbonate hydraulic binder having undergone a hydraulic setting, said core being enclosed in a shell formed by a micro-concrete with reactive powder (MBPR) having undergone hydraulic setting.
• MBPR micro-concrete with reactive powder
• the waste fragments can in particular come from waste chosen from household waste (DM), household waste (OM), residual household waste (OMR), mixtures of at least two among MD, OM and OMR , organic material waste, industrial waste, sludge waste, or mixtures of these wastes, said fragments having in particular been subjected to an inerting treatment, in particular with a composition based on quicklime.
• DM household waste
• OM household waste
• OMR residual household waste
• Household waste refers to waste resulting from the daily domestic activity of households and from economic activities collected under the same conditions as these. This waste is that collected by the traditional collection of residual household waste, by selective collections, by waste reception centers, bulky waste collections and green waste collections.
• Household waste refers to waste resulting from the daily domestic activity of households and from economic activities collected under the same conditions as these. This waste is that collected by the traditional collection of residual household waste, by selective collections.
• Residual household waste refers to the proportion of mixed household waste after selective collection.
• Household waste, household waste and residual household waste are for France products listed and standardized by the Environment and Energy Management Agency (ADEME).
• ADME Environment and Energy Management Agency
• composition of OMR in France is as follows according to ADEME:
• Organic matter waste can, among other things, be beet pulp and other processing waste from the food industry.
• Industrial waste can, among other things, consist of sand from hyperbaric waterjet cutting.
• Sludge and sediment waste can, among other things, be dredged sludge and sediment from ports and channels, or sludge and sediment from wastewater treatment plants.
• the micro-concrete with a carbonate hydraulic binder which has undergone hydraulic setting during the formation of the cores of the grains comprises the following constituents:
• the reactive powder micro-concrete (MBPR) having undergone a hydraulic setting for the formation of the shells comprises the following constituents:
• micro-concretes and reactive powder micro-concretes which may be chosen from setting accelerators, setting retarders, air entrainers, plasticizers, including superplasticizers, pigments, grinding agents, colloids and bulk water repellents,
• the micro-concrete ensuring the connection of the waste fragments can also be a reactive powder micro-concrete (MBPR) as defined above.
• MBPR reactive powder micro-concrete
• the weight ratio of waste fragments: micro-concrete ensuring the bonding of the waste fragments is in particular between 10: 1 and 1: 3.
• the core: shell weight ratio of a grain is in particular between 15: 1 and 1: 3, in particular being from 1: 1 to 2: 1.
• the waste fragments may each have a greater dimension of at most 30 mm, being in particular 100 ⁇ m - 5 mm; cores can have a larger dimension of 100 - 500 mm; and the shells can have a thickness of 0.3 to 10 mm.
• the grains can have any shape, such as spherical, spheroidal, parallelepipedal, cylindrical.
• the present invention also relates to granules formed by the assembly of at least two, in particular from two to twenty, basic grains as defined above, the granules possibly having dimensions chosen to constitute a set of granules of which the dimensions are distributed according to a grain size curve to form an aggregate advantageously meeting the standard NFP18-545, or a set of granules, which added to another aggregate such as a natural aggregate, form a mixed aggregate advantageously meeting the standard NFP18-545.
• the basic grains of a granule may have been assembled by pressure, gluing or bonding by a carbonated hydraulic binder concrete having undergone hydraulic setting, such as a micro-concrete or a micro-concrete with reactive powder (MBPR), for example an MBPR as defined above, said assembly having in particular a lower resistance to compression / impacts than the base grains.
• a carbonated hydraulic binder concrete having undergone hydraulic setting, such as a micro-concrete or a micro-concrete with reactive powder (MBPR), for example an MBPR as defined above, said assembly having in particular a lower resistance to compression / impacts than the base grains.
• MBPR micro-concrete with reactive powder
• the cores can advantageously have a compressive strength of at least 15 MPa, in particular at least 25 MPa; the grains may have a compressive strength of at least 25 MPa, in particular at least 60 MPa; and the granules can exhibit a compressive strength of at least 20 MPa, especially at least 45 MPa.
• the present invention also relates to a process for manufacturing grains, granules and aggregates as defined above, characterized in that it comprises the following successive steps:
• the invention also relates to the use of grains, granules and aggregates as defined above, or prepared by the process as defined above, as constituents of a composition of construction materials in the building field, public works and civil engineering, in particular for the construction of walls, floors, stonework, and all concrete structures.
• MBPRs reactive powder micro-concretes having the compositions shown in Table 1 were used.
• the compressive strength class of concretes (including micro-concretes and reactive powder micro-concretes) is expressed by CX / Y, C denoting the English word for concrete: "concrete” and X and Y corresponding to the compressive strength in MPa at 28 days, measured respectively on a cylindrical specimen and on a cubic specimen.
• the superplasticizer sold under the name “DYNAMON NRG 1045” by the company “MAPEI” was also used as a liquid adjuvant to each MBPR, and, for the formation of the hulls of the base grains, a bulk water repellent. marketed under the name “SIKACEM Liquid water repellent” by the company “SIKA”.
• the ripening times described in these Examples are each of the order of 28 days, as is well known in the construction industry.
• Example 1 Manufacture of a 40/80 aggregate
• the material thus shredded was then transferred to a drum mixer in which it was combined with a quicklime composition to treat the organic parts of the OM and OMR in order to make them as inert as possible.
• the material thus treated was then transferred to a series of industrial mill line with a maximum pass of 5 mm to obtain OM / OMR fragments with a larger dimension of 5 mm.
• the OM and OMR fragments were then transferred by worm screw to a mixer in which they were mixed by mixing a mixture of MBPR1 + superplasticizer and water in the following proportions, in parts by weight:
• the resulting amalgam was then transferred to an automated molding line to manufacture 1 mx 1 m slabs 18 mm thick and density 2.5 in a hydraulic press.
• the slabs thus obtained were stored for use after a period of time at least equal to their maturation time.
• Each of the cores thus obtained was coated by rolling in a Rotomat type drum with a shell of MBPR1 with a thickness of 1 mm, uniformly distributed over the surface of each grain core.
• the grain cores were mixed with a mixture of MBPR1 + superplasticizer + water repellent by mass and water in the following proportions, in parts by weight:
• the base grains thus obtained were stored for use after a period of time at least equal to their maturation time.
• the base grains obtained in C were transferred by conveyor belt into a refusal mixer in which a mixture of super-plasticizer MBPR2 + and water was combined in the following proportions, in parts by weight:
• the aggregates thus obtained were stored for use after a period of time at least equal to their maturation time.
• Example 2 Manufacture of an 8/12 aggregate
• Example 1 The procedure was as in Example 1, A, except that after treatment with the quicklime composition, the material thus treated was transferred to a series of industrial crusher lines with a maximum pass of 1 mm, to obtain OM / OMR fragments larger than 1 mm.
• the grain cores thus obtained were stored for use after a period of time at least equal to their maturation time.
• Example 3 Manufacture of a 6/15 aggregate
• Example 1 The procedure was as in Example 1, A, except that after treatment with the quicklime composition, the material thus treated was transferred to a series of industrial crusher lines with a maximum pass of 1 mm.
• the grain cores thus obtained were stored for use after a period of time at least equal to their maturation time.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)
• Organic Chemistry (AREA)
• Civil Engineering (AREA)
• Inorganic Chemistry (AREA)
• Environmental & Geological Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Processing Of Solid Wastes (AREA)
• Curing Cements, Concrete, And Artificial Stone (AREA)

Applications Claiming Priority (2)

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• 2019
  • 2019-02-11 FR FR1901351A patent/FR3092578B1/fr active Active
• 2020
  • 2020-02-10 EP EP20709319.6A patent/EP3924315A1/de active Pending
  • 2020-02-10 US US17/310,548 patent/US20220106228A1/en active Pending
  • 2020-02-10 WO PCT/IB2020/051023 patent/WO2020165729A1/fr unknown
  • 2020-02-10 CA CA3129538A patent/CA3129538A1/fr active Pending

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