• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for manufacturing a lightened concrete or mortar composition having a density in the dry state of between 200 and 1400 kg / m 3 in which constituents comprising at least lightweight aggregates of density are mixed. particles of between 50 and 1000 kg / m 3, at least one inorganic binder chosen from hydraulic binders, sources of calcium sulphates and lime, at least one foaming agent and water, and optionally one or more additives, said foaming agent being a polyvinyl alcohol and its foaming being in-situ during its mixing with water and at least one of the constituents selected from the aggregates and / or the inorganic binder.
    公开号:FR3021652A1
    申请号:FR1454801
    申请日:2014-05-27
    公开日:2015-12-04
    发明作者:Elodie Taboulot；Geir Ove Norden
    申请人:Saint Gobain Weber SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a process for producing a lightened concrete composition or mortar, the composition obtained according to this process as well as products that can be obtained from a such a composition once cured. Many works in the field of construction are currently focused on the search for lighter materials and products, which, being less dense, exert less stress on the support on which they are deposited and thus make it possible to obtain lighter structures. It remains important, however, that these materials retain good properties both mechanical (mechanical strength, impact resistance, resistance to various mechanical stresses) and thermal. Concretes or mortars are composed of aggregates and / or sand agglomerated with a binder. In common concretes, aggregates are grains of stone, gravel or sand. Mortar is distinguished from concrete by the size of aggregates present in its composition, since a mortar is composed of fine sand or aggregates agglomerated by a binder. 9 the aggregates have a mean diameter greater than 8 mm, we speak of concrete. 9 their diameter is less than 8 mm, it will be called mortar. A light concrete is characterized by a lower density than a common concrete, either by its cavernous character, or by use of light aggregates such as expanded clays, expanded shales, pozzolans, pumice stones, expanded polystyrene, cenospheres including fly ash, expanded glass, crushed and milled slags, vermiculite or perlite. While a common concrete has a density of about 2300 kg / m3, a light concrete is conventionally characterized by a density of less than 2000 kg / m3. In the same way, a lighter mortar includes the same types of light aggregates. It is within this framework of research of new lightened and mechanically and thermally efficient materials that the present invention fits.
    [0002] Application WO 01/70647 discloses a method for producing a hydraulic binder foam comprising a step of preparing an aqueous foam before mixing it with the hydraulic binder. The foam is thus pre-formed by air injection to produce a stable foam, before being mixed with the other components. The hydraulic binder foam is then put into the desired shape in order to obtain, after setting, a finished product. The present invention relates to a method of manufacturing a lightened concrete composition or mortar, that is to say whose density is between 200 and 1400 kg / m 3, said composition making it possible to obtain cured products light, whose mechanical strength is improved in particular compared to known products comprising lightweight aggregates.
    [0003] The process for manufacturing the lightened concrete or mortar composition is characterized in that it comprises the mixture of constituents comprising at least lightweight granules with a density of particles of between 50 and 1000 kg / m 3, at least one mineral binder. selected from hydraulic binders, sources of calcium sulphates and lime, at least one foaming agent and water, optionally one or more additives, the foaming agent being a polyvinyl alcohol, its foaming being in-situ when mixing with water and with at least one of the constituents selected from the aggregates and / or the inorganic binder. The advantage of this process in particular makes it possible to directly use polyvinyl alcohol as an air entrainer, which makes it possible to obtain a moderate foaming of the composition while controlling and increasing the viscosity of the mixture. The fact of being able to carry out the in-situ foaming directly during the preparation of the lightened concrete or mortar composition makes it possible to simplify the process and to eliminate the pre-generation stage of the foam, requiring most of the time in this step also use foam stabilizers. With respect to the usual surfactants which could be used for the manufacture of lightened concrete composition or mortar, such as anionic, cationic, zwitterionic and / or nonionic surfactants or their mixture, polyvinyl alcohol 302 has the advantage, in addition to its foaming power, to modify the viscosity of the mixture so that the air bubbles generated during foaming in situ are trapped in the fresh composition and are not released during mixing, transport, compaction or hardening of the composition. With conventional surfactants, it is possible to trap air bubbles, but most often foaming is much more difficult to control because too fast and a strong rise of air bubbles is on the surface, reducing the lightening power. Polyvinyl alcohol also has the advantage of being in compliance with Environment, Health and Safety standards. The method according to the invention makes it possible to manufacture a fresh concrete or mortar composition which, once hardened, makes it possible to significantly reduce the weight of the materials obtained by reducing their density, while maintaining the mechanical strengths. The thermal properties are also improved. The formation of the foam from the foaming agent present in the mixture is in-situ during the mixing of the various constituents and therefore during the preparation of the concrete composition or mortar. No gas injection is necessary to obtain foaming. The method according to the present invention does not include a pre-generation step of the foam. The polyvinyl alcohol used in the process according to the invention has a degree of hydrolysis of between 65 and 99 mol%, preferably between 70 and 99 mol%. The preferred polyvinyl alcohols are those having a viscosity of at least 3cP, when measured in solution at a concentration of 4% in water at 20 ° C. By choosing polyvinyl alcohol in this way, it is ensured that it is sufficiently soluble in the water used in the composition on the one hand and on the other hand that the foaming is sufficient. In addition to the foaming agent based on polyvinyl alcohol, the process according to the invention may comprise the mixing of another foaming agent, for example of the cationic, anionic, zwitterionic and / or nonionic surfactant type. Preferably, the only foaming agent used in the process according to the present invention consists of one or more polyvinyl alcohols. The foaming remains sufficient, controlled and stable over time using only polyvinyl acid. The polyvinyl alcohol may be in powder form or in liquid form, in the form of an aqueous solution.
    [0004] The content of polyvinyl alcohol is less than 10% by weight, preferably between 0.01% and 8% by weight relative to the total mixture of the various constituents, preferably between 0.01% and 5% by weight, and more preferably more preferably between 0.05% and 2% by weight. The addition of the foaming agent is carried out directly in the mixer 10 in which the mortar or concrete composition is prepared, the foaming agent being introduced either in the form of a dry powder or in the form of an aqueous solution. The various constituents of the mixture, namely the lightened granules, the inorganic binder, the foaming agent and the water can be introduced in any order into the mixer.
    [0005] According to a preferred embodiment, the process according to the present invention comprises mixing the various constituents in the following way: the lightened granules, the water and the foaming agent are mixed together in the mixer, and the mineral binder is added to the mixture thus formed. The mixing time necessary for the appearance of the foam during the step of adding the foaming agent is between 10 and 180 seconds. The mixing time after the addition of the inorganic binder is between 1 and 5 minutes, preferably between 1 and 3 minutes. The water used in the manufacturing process can be advantageously heated before being introduced into the mixture, so as to obtain a mortar or concrete composition at a temperature of 20 to 25 ° C. This temperature advantageously makes it possible to promote the foaming of the polyvinyl alcohol and consequently to reduce the quantities of foaming agent necessary to obtain the desired lightening.
    [0006] The lightened aggregates used in the process according to the present invention are chosen from expanded clays, expanded shales, pozzolans, pumice stones, expanded polystyrenes, cenospheres, in particular fly ash, expanded glass, crushed and crushed slags. vermiculite or perlite, crushed cork aggregates and ground tire waste aggregates having a particle density of from 50 to 1000 kg / m 3, preferably from 200 to 600 kg / m 3. The content of aggregates in the mixture is between 10 and 95% by weight, preferably between 30 and 95% by weight of the total mixture of the different constituents. When the lightened aggregates are expanded clays, the expanded clay content having a particle diameter greater than 2 mm preferably represents more than 50% by weight of the expanded clays. The process according to the invention advantageously makes it possible to obtain lightened construction products having the desired properties in terms of mechanical strength, despite the large quantity of coarse light aggregates (that is to say the particle diameter of which is greater than at 2 mm). It is possible that the blend comprises, in addition to lightweight aggregates, up to 20% by volume of natural or artificial aggregates having a particle density greater than 2,300 kg / m3. The inorganic binder used in the process according to the present invention may be a hydraulic binder chosen from Portland cements, aluminous cements, sulphoaluminous cements, belitic cements, blast furnace slags, pozzolanic mixture cements possibly comprising ashes. flying, silica fumes, limestone, calcined shale and / or natural or calcined pozzolans, alone or as a mixture. It can also be a source of calcium sulphate and be selected from plaster or hemihydrate, gypsum and / or anhydrite. It can also be lime. The inorganic binder may be an acid-base binder such as a phospho-magnesium cement. These different types of binders can be used alone or in mixture. The inorganic binder represents between 5 and 40% by weight of the total mixture of the various constituents. The manufacturing method according to the present invention makes it possible to obtain a wet or fresh concrete or mortar composition, since one of the constituents of the mixture is water. The first function of water is to ensure the hydration of the mineral binder. The second function is to give the concrete or mortar sufficient maneuverability so that it can be implemented for the desired application. The amount of water used in the process depends in particular on the aggregates used in the mixture. Typically, the E / C ratio corresponding to the ratio between the amount of water and the amount of inorganic binder varies between 0.2 and 1.0. Part of the water, called effective water is the water that is used to hydrate the mineral binder. It is different from the total amount of water introduced into the process, since part of this total water is absorbed by the aggregates. Other additives or additives conferring particular properties on the concrete or mortar composition may be added during the mixing of the various constituents. For example, rheological agents such as plasticizers or superplasticizers, water-retaining agents, thickeners, biocidal agents, dispersants, water-repellent agents, pigments, accelerators and / or or retarders, and also other agents to improve the setting, hardening and / or stability of the mortar or concrete after application, to adjust the color, the workability, the implementation or the impermeability. The total content of additives and adjuvants conventionally varies between 0.001% and 5% by weight relative to the total composition of the constituents used in the process. It is also possible to add to the mixture other inert fillers, also called fillers, limestone and / or siliceous type.
    [0007] The present invention also relates to a mortar or concrete composition obtained according to the method described above. Construction products such as masonry blocks, chimney blocks, slabs, lintels, panels or wall construction elements, obtained after curing the lightened concrete composition or mortar described above are also a object of the present invention. These products are preferentially prefabricated. Very advantageously, these products are manufactured by a process comprising a step of molding the concrete or mortar composition obtained according to the method of the present invention in which said composition is poured or extruded into a mold or formwork, by gravity and / or by applying a force, immediately followed by a demolding step, and a curing step performed outside the mold. The consistency of the composition obtained according to the process of the present invention allows immediate demolding of the wet product, keeping the desired shape due to good strength of the composition even before curing. The demolding is performed all the more easily that the resulting composition has the advantage of not sticking to the mold. This manufacturing process can be advantageously carried out in a vibrating block compacting machine (still sometimes referred to as a block layer), or in any other similar automatic compacting device. Thus, for example, building blocks can be obtained by pouring the concrete or mortar composition obtained from the process according to the present invention in a vibrating compacting machine conventionally used for the formation of these blocks. The compaction time is less than 10 seconds, or even less than 5 seconds. The block is then removed from the compaction mold and left to harden out of the mold for 12 to 24 hours. According to another embodiment, these products may be manufactured by a process comprising a step of molding said composition prepared as described above, preferably carried out in an automatic compaction device, in which said composition is poured or extruded into a mold or formwork, by gravity and / or applying a force, a curing step performed in the mold, followed by a demolding step of the cured composition. Usually, the curing time is about 24 hours. The products obtained according to these embodiments have good mechanical strength for a low density. They have good airtightness and have good thermal conductivity properties. They are also characterized by low water absorption when placed, once cured, in a humid atmosphere. The dry products obtained have a density in the dry state of between 200 and 1400 kg / m 3, or even preferably less than 900 kg / m 3.
    [0008] The following examples illustrate the invention without limiting its scope. In the various examples below, the amounts of the various constituents are given by weight. The bulk densities of the light aggregates used were measured and are given below to within ± 10% for each of the values: Light aggregate type Leca0, crushed, 0-1.5 mm: 330 kg / m3 Light granulate type Leca0 , 1.5-4mm crushed: 310 kg / m3 Light Leca0 type grit, 2.5-5mm crushed: 310 kg / m3 10 Light Leca® type grit round 4-10 mm: 285 kg / m3 Light Leca® round grit 2-6 mm: 350 kg / m3. The compressive strength measurements were made according to EN 772-1.
    [0009] Airtightness measurements are made according to an internal procedure used for chimney blocks, as described below. Two plates each having soft corners covering the corners are placed on each side of a sample. One of the plates has an air inlet pipe, and the other plate is flat. Air at a pressure of 50 Pa is introduced to one side of the sample. Once the air flow through the sample is stabilized, the amount of outgoing air is measured. The test is considered satisfactory when the quantity of outgoing air measured is less than or equal to 1 m3 / h.
    [0010] EXAMPLE 1 Process for the Production of Stacked Blocks with Polyvinyl Alcohol A Foaming Agent An aqueous solution of foaming agent containing 15% polyvinyl alcohol is prepared as follows: 15 g of polyvinyl alcohol A marketed under lvol ™ brand having a degree of hydrolysis of 87% and a viscosity of 5 cP measured in solution at a concentration of 4% in water at 20 ° C are mixed with 85 g of water for a period of 24 hours. After preparation, this solution is stored at a temperature of 20 ° C.
    [0011] 3021652 9 Light aggregates are introduced into the concrete mixer. The cement is added, then the mixing water. Once all the water is introduced, the 15% SelvolTM aqueous solution is added. The concrete composition is mixed for 2 to 4 minutes until a stable and homogeneous foam is obtained. Table 1 below gives the quantities of the various constituents introduced to form 1 m3 of concrete.
    [0012] 10 Composition 1 Leca® ground 0-1.5 mm Kg / m3 of 120 Leca® concrete ground 1.5-4 mm Kg / m3 of concrete 140 Leca® round 4-10 mm Kg / m3 of concrete 91 Leca® round 2 -6 mm Kg / m3 of concrete 32 Adorn EN 197-1-CEM 142.5 P Norcem Industri 182 Ivol Te type A, 15% solution Kg / m3 of concrete 24.5 Water added Kg / m3 of concrete 127 Total (kg / m3 of 717 Table 1 Note: The amount of Selvol introduced relative to all the constituents of the mixture is 0.5% by weight since the polyvinyl alcohol is introduced as a 15% aqueous solution. The physical characteristics measured on the hardened outside stack blocks obtained from the composition 1 described in Table 1 are given below (Table 2): Product Dry density (kg / kg) m3) Compressive strength measured at 28 days (MPa) Airtightness m3 / h (50Pa) Chimney blocks 700.6 8.4 0,9 5 Table 2 The process according to the invention allows to obtain chimney blocks having a porous structure so lighter than conventional structures, maintaining a good airtightness.
    [0013] Example 2: Process for producing chimney blocks with a polyvinyl alcohol B as a foaming agent In this example, a different foaming agent, namely a polyvinyl alcohol B, sold under the brand name IvolTiv, which has a viscosity of 23 cP measured in solution at a concentration of 4% in water at 20 ° C and a degree of hydrolysis of 87% in the form of a powder. Light aggregates are introduced into the concrete mixer. The cement and the polyvinyl alcohol powder B and then the mixing water are added. Table 3 below gives the quantities of the various constituents introduced to form 1 m3 of concrete.
    [0014] 25 3021652 11 Composition 2 Leca® ground 0-1.5 mm Kg / m3 of concrete 120 Leca® round 4-10 mm Kg / m3 of concrete 91 Leca® round 2-6 mm Kg / m3 of concrete 191 Adorn EN 197- 1-CEM 142.5 P Norcem Industri (Kg / m3 of concrete) 218 Polyvinyl alcohol B Kg / m3 of concrete 2.2 Water added Kg / m3 of concrete 112 Total (kg / m3 of concrete) 734 Table 3 Foaming agent content in this composition represents 0.3% by weight of the total mass of the various constituents. The physical characteristics measured on the hardened outside mold block blocks obtained from the composition 2 described in Table 3 are given below (Table 4): Product Density in the dry state (kg / m3) ) Compressive strength measured at 28 days (MPa) Airtightness m3 / h (50Pa) Block of chimneys 846 5.8 1.0 5 10 Table 4 3021652 12 Example 3: Process for the manufacture of chimney blocks with polyvinyl alcohol B as a foaming agent. The same type of product as that described in Examples 1 and 2 is prepared by changing the order of introduction of the constituents into the concrete mixer. According to this example, the polyvinyl alcohol B is introduced into the mixer in powder form, along with the light aggregates and water. These components are mixed for about 120 seconds until a foam is obtained. The cement is then introduced into the mixer. The whole is mixed for 90 to 120 seconds. Three different compositions have thus been prepared and are described in Table 5 below.
    [0015] Composition 3 Composition 4 Composition 5 Crushed Leca® 0-1.5 120 120 120 mm Kg / m3 Concrete Leca0 Round 4-10 mm Kg / m3 Concrete 91 91 117 Leca0 Round 2-6 mm Kg / m3 of concrete 191 191 159 Adorn EN 197-1-CEM 142.5 P 218 0 164 Norcem Industri (Kg / m3 of concrete) Adorn FA 0 218 0 EN 197-1-CEMII / AV 42,5R (Kg / m3 of concrete ) Polyvinyl alcohol B Kg / m3 of concrete 2.2 2.2 2.2 Water added Kg / m3 of concrete 139 127 104 Total (kg / m3 of 761 749 666 concrete) Table 5 The content of foaming agent in the compositions 3 and 4 represents 0.3% by weight of the total mass of the various constituents. It is 0.33% by weight in composition 5. The physical characteristics measured on the hardened out-of-mold stack blocks obtained from the compositions described in Table 5 are given below (Table 6). .
    [0016] 10 3021652 14 Product Density in dry state (kg / m3) Compressive strength measured at 28 days (MPa) And air-cooled m3 / h (50Pa) Block of fireplaces composition 3 790 11 0.8 Chimney blocks composition 4,770 10.4 0.9 Stack blocks composition 5 736 9.6 0.8 Table 6 5 These tests show that it is possible to vary the mineral binder and to reduce the amount of inorganic binder and therefore to reduce the density of the products obtained and their cost, while maintaining their physical performance and in particular their airtightness.
    [0017] Example 4 (Comparative): A method of manufacturing conventional lightened chimney blocks. Two non-foaming concrete compositions were prepared by mixing the various components listed in Table 7 below with sand having a bulk density of 1200 kg / m 3.
    [0018] Composition C1 Composition C2 Leca0 ground 0-1.5 mm Kg / m3 concrete 0 86 Leca® round 4-10 mm Kg / m3 concrete 286 164 Leca0 round 1.5-5 mm Kg / m3 concrete 0 94 Cement -CEM 142.5 R Kg / m3 of concrete 100 200 Sand (kg / m3 of concrete) 360 461 Water added Kg / m3 of concrete 100 150 Table 7 1 m3 of mixture is prepared.
    [0019] The physical characteristics measured on the hardened outside mold block blocks obtained from compositions C1 and C2 described in Table 7 are given below (Table 8): Product Density (kg) / m3) Resistance to compression measured at 28 days (MPa) Airtightness m3 / h (50Pa) Block of chimneys composition Cl 800 3-4 35 Block of chimneys composition C2 1000 3-4 7-9 Table 8 10 The products thus obtained do not make it possible to obtain airtight chimney blocks, even when the quantity of fine aggregates which make it possible to reduce the porosity is increased.
    [0020] EXAMPLE 5 Process for the Production of Lightened Blocks of 100 mm * 190 mm * 500 mm Size The method of introducing the various constituents into the concrete mixer is identical to that described in Example 3. Two different compositions were thus prepared and are described in Table 9 below. Composition 6 Composition 7 Leca0 ground 0-1.5 mm Kg / m3 of concrete 120 83 Leca0 round 4-10 mm Kg / m3 of concrete 117 257 Leca0 round 2-6 mm Kg / m3 of concrete 159 105 Cement EN 197-1 -CEM I 164 130 42.5 P Norcem Indust ri Kg / m3 of concrete Polyvinyl alcohol B Kg / m3 of concrete 2.2 2.8 Water added Kg / m3 of concrete 128 104 Total (kg / m3 of concrete) 690 682 Table 9 The content of foaming agent in the compositions 6 and 7 respectively represents 0.3% by weight and 0.4% by weight of the total mass of the various constituents.
    [0021] The physical characteristics measured on the hardened blocks outside the mold obtained from the compositions described in Table 7 are given below (Table 10): Product Density in the dry state (kg / m3) ) Compressive strength measured at 28 days (MPa) Blocks 740 8.5 Composition 6 Blocks 631 6.3 Composition 7 Table 10 5 These tests show that it is possible according to the method of the present invention to obtain blocks lightened with a density lower than 750 kg / m3 and which have good mechanical resistance to compression. Example 6: Process for manufacturing blocks of dimensions 100 mm * 190 mm * 500 mm The method for introducing the various constituents into the concrete mixer is identical to that described in Example 3. A composition 8 was thus prepared and is described in Table 11 below.
    [0022] 20 Composition composition 8 Leca® round 4-10 mm 285 Kg / m3 of concrete Adorn EN 197-1-CEM I 42.5 P 130 Norcem Industri Kg / m3 of concrete Polyvinyl alcohol B 2.6 Kg / m3 of concrete Water added 55 Kg / m 3 of concrete Total (Kg / m 3 of concrete) 473 Table 11 The content of foaming agent in the composition 8 represents 0.5% by weight of the total mass of the various constituents.
    [0023] The physical characteristics measured on the cured blocks outside the mold obtained from the composition 8 described in Table 11 are given below (Table 12) Product Density in the dry state (kg / m3) Resistance to compression measured at 28 days (MPa) Thermal conductivity (W / mK) Blocks 505 2.1 0.12 composition 8 Table 12 This test shows that the process according to the invention makes it possible to manufacture very light-weight blocks from coarse light aggregates, which retain a compressive strength greater than 2 MPa. The density of this product and the manufacturing costs associated with this product are significantly reduced.
    [0024] Example 7 (Comparative): Conventional Blocks For comparison, standard blocks of 100mm * 190mm * 500mm dimension were manufactured, with sand having a bulk density of 1200 5 kg / m3. The composition is given in Table 13. Composition C3 Leca® round 4-10 mm 223 Kg / m3 Leca® round concrete 2-6 mm 123 Kg / m3 ND Sand-Vister concrete 0-4 mm 471 kg / m3 concrete 0 ment EN 197-1-CEM I 42.5 P 128 Norcem Indust ri kg / m3 of concrete Water added 39 Kg / m3 of concrete Total (kg / m3 of concrete) 1000 Table 13 Physical characteristics measured on cinder blocks cured at The outside of the mold obtained from the composition described in Table 13 are given below (Table 14): Product Dry density (kg / m3) Compressive strength measured at 28 days (MPa) ) Thermal conductivity (W / mK) Blocks blockwork composition C3 922 6.1 0.26 Table 14.
    权利要求:
    Claims (15)
    [0001]
    REVENDICATIONS1. A process for manufacturing a lightened concrete or mortar composition having a density in the dry state of between 200 and 1400 kg / m3, characterized in that it comprises the mixture of constituents comprising at least lightweight aggregates with a density of particles between 50 and 1000 kg / m3, at least one mineral binder selected from hydraulic binders, sources of calcium sulphates and lime, at least one foaming agent and water, and optionally one or more additives, the said foaming agent being a polyvinyl alcohol and its foaming being in-situ during its mixing with water and with at least one of the constituents selected from the aggregates and / or the inorganic binder.
    [0002]
    2. Method according to the preceding claim characterized in that the polyvinyl alcohol has a degree of hydrolysis of between 65 and 99 mol%, preferably between 70 and 99 mol%.
    [0003]
    3. Method according to one of the preceding claims characterized in that the mixture further comprises a foaming agent based on anionic surfactant, cationic, zwitterionic and / or nonionic.
    [0004]
    4. Method according to claims 1 or 2 characterized in that the mixture comprises only a foaming agent consisting of one or more polyvinyl alcohols.
    [0005]
    5. Method according to one of claims 1 to 4 characterized in that the content of foaming agent is between 0.01% and 8% by weight of the total mixture of the various constituents, preferably between 0.01% and 5% by weight. weight and even more preferably between 0.05% and 2% by weight.
    [0006]
    6. Method according to one of the preceding claims characterized in that the addition of the foaming agent is carried out directly in the mixer in which the mortar or concrete composition is prepared, the foaming agent being introduced in the form of powder dry, either in the form of an aqueous solution.
    [0007]
    7. Method according to claim 6 characterized in that the lightened aggregates, water and foaming agent are mixed together in the mixer, before introducing the inorganic binder.
    [0008]
    8. Method according to one of the preceding claims characterized in that heated water is introduced into the mixture so as to obtain a concrete composition or mortar at a temperature of 20 to 25 ° C.
    [0009]
    9. Method according to one of the preceding claims characterized in that the lightweight aggregates are selected from expanded clays, expanded shales, pozzolans, pumice stones, expanded polystyrenes, cenospheres including fly ash, expanded glass, crushed and milled slags, vermiculite or perlite, milled cork aggregates, crushed tire waste aggregates having a particle density of between 50 and 1000 kg / m 3, preferably between 200 and 600 kg / m 3 , their content in the mixture being between 10 and 95% by weight, preferably between 30 and 95% by weight of the total mixture of the various constituents.
    [0010]
    10. Method according to one of the preceding claims characterized in that the mixture further comprises additives which are rheological agents such as plasticizers or superplasticizers, water-retaining agents, thickeners, biocides protection agents , dispersing agents, water-repellent agents, pigments, accelerators and / or retarders, and other agents to improve setting, hardening and / or stability of the mortar or concrete after application, to adjust color, maneuverability, application or impermeability.
    [0011]
    11. Method according to one of the preceding claims characterized in that the inorganic binder is a hydraulic binder selected from Portland cements, aluminous cements, sulfoaluminous cements, belitic cements, blast furnace slags, cements de pozzolanic mixture optionally comprising fly ash, silica fumes, limestone, calcined shale and / or natural or calcined pozzolans, alone or as a mixture, - a source of calcium sulphate chosen from plaster or hemihydrate, gypsum and / or anhydrite, and / or - lime, the mineral binder content representing between 5 and 40% by weight of the total mixture of the various constituents.
    [0012]
    12. A composition of concrete or lightened mortar characterized in that it is obtained by the method according to one of claims 1 to 11.
    [0013]
    13. Structural products having a dry density of between 200 and 1400 kg / m3, possibly prefabricated, such as masonry blocks, chimney blocks, slabs, lintels, panels or structural elements. wall construction, obtained after curing of the concrete composition or lightened mortar according to claim 12.
    [0014]
    14. A method of manufacturing prefabricated products according to claim 13 characterized in that it comprises a step of molding the composition according to claim 11, preferably carried out in a vibrating compact block compacting machine or in any other equivalent compacting device. automatic, wherein said composition is poured or extruded into a mold or form, by gravity and / or applying a force, immediately followed by a demolding step, and a curing step performed outside the mold.
    [0015]
    15. A method of manufacturing prefabricated products according to claim 13 characterized in that it comprises a step of molding the composition according to claim 11 preferably made in an automatic compaction device, wherein said composition is poured or extruded in a mold or formwork, by gravity and / or applying a force, a curing step performed in the mold, followed by a step of demolding the cured composition.
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    EP2474512B1|2016-10-26|Light concrete made of recycled aggregates and use thereof
    JP6275995B2|2018-02-07|Water retention block
    同族专利:
    公开号 | 公开日
    WO2015181479A1|2015-12-03|
    EP3148953A1|2017-04-05|
    FR3021652B1|2016-05-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2001070647A1|2000-03-22|2001-09-27|Balmoral Technologies Ltd|Method of producing a hydraulic binder foam|
    WO2002020423A2|2000-09-04|2002-03-14|Balmoral Technologies Limited|Method for the production of a hydraulic binder foam|
    KR20130093051A|2013-07-02|2013-08-21|주식회사이노빅|A composite for light weight foam concrete with high insulation for reducing of floor impact sound and manufactoring method thereof|WO2018017441A1|2016-07-19|2018-01-25|United States Gypsum Company|Lightweight foamed cement, cement board, and methods for making same|
    WO2018177447A1|2017-03-31|2018-10-04|SLAVICKOVA, Lucie|Concrete, a dry mixture for the preparation of this concrete, and a method for the preparation of this concrete|
    CN112341121A|2020-11-06|2021-02-09|南京交通职业技术学院|Light high-strength concrete for civil engineering|US8535583B2|2004-07-27|2013-09-17|Tower Technology Holdings Ltd.|Hydraulic binder product|
    FR2957073B1|2010-03-08|2012-06-22|Ct D Etudes Et De Rech S De L Ind Du Beton Manufacture|ULTRALEGER BETON AND ITS USE|CN108640604A|2018-05-29|2018-10-12|温仕鑫|A kind of preparation method of build concrete cementitious material|
    FR3096365B1|2019-05-24|2021-09-03|Saint Gobain Weber|Dry composition of mortar, especially adhesive mortar for tile adhesive|
    CN110776277A|2019-11-14|2020-02-11|湖南易兴建筑有限公司|Brickwork and preparation method thereof|
    CN112358229A|2020-11-02|2021-02-12|清远市德居新型建筑材料有限公司|Novel paste polymer light mortar formula|
    CN112573872A|2020-11-24|2021-03-30|山东泓畅建材有限公司|Energy-saving emission-reducing light foam concrete|
    CN112608109A|2021-01-14|2021-04-06|连云港美特佳新型建材有限公司|Method for producing high-performance concrete by using industrial waste residues|
    法律状态:
    2015-05-21| PLFP| Fee payment|Year of fee payment: 2 |
    2015-12-04| PLSC| Search report ready|Effective date: 20151204 |
    2016-05-19| PLFP| Fee payment|Year of fee payment: 3 |
    2017-05-24| PLFP| Fee payment|Year of fee payment: 4 |
    2018-05-22| PLFP| Fee payment|Year of fee payment: 5 |
    2020-02-14| ST| Notification of lapse|Effective date: 20200108 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1454801A|FR3021652B1|2014-05-27|2014-05-27|PROCESS FOR PRODUCING A CONCRETE COMPOSITION OR ALLOY MORTAR|FR1454801A| FR3021652B1|2014-05-27|2014-05-27|PROCESS FOR PRODUCING A CONCRETE COMPOSITION OR ALLOY MORTAR|
    PCT/FR2015/051366| WO2015181479A1|2014-05-27|2015-05-22|Method for manufacturing a composition of lightweight concrete or mortar|
    EP15732789.1A| EP3148953A1|2014-05-27|2015-05-22|Method for manufacturing a composition of lightweight concrete or mortar|
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