• 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 present invention relates to a method for manufacturing plantizable light aggregate blocks. In particular, the method makes it possible to manufacture blocks of light aggregate agglomerated by means of a hydraulic binder promoting the growth of plants on their surface. The blocks produced by the process have interconnected pore networks forming channels suitable for root development of plants.
    公开号:FR3073841A1
    申请号:FR1761028
    申请日:2017-11-22
    公开日:2019-05-24
    发明作者:Joumana Yammine-Malesys；Jessy Gillot
    申请人:Saint Gobain Weber SA；
    IPC主号:
    专利说明:

    Method for manufacturing blocks of light vegetable aggregates
    The present invention relates to a process for manufacturing blocks of light vegetable aggregates. In particular, the process makes it possible to manufacture blocks of agglomerated light aggregates by means of a hydraulic binder promoting the growth of plants on their surface. The blocks produced by the process have networks of interconnected pores forming channels adapted to the root development of plants. The blocks are suitable, for example, for the construction of exterior walls, facing facades and floors or even roof terraces of buildings.
    The greening of facades and flat roofs has not stopped progressing since green spaces are recognized to bring many benefits in urban environments: an improvement in air quality, acoustic comfort, visual comfort, and thermal insulation, a reduction in heat island phenomena, better management of rainwater, a reintroduction of the urban biosphere, and the creation of urban farms. Cities then become progressively more economical and resilient by offering better living comfort, especially when meteorological phenomena can be intense.
    Currently, the construction methods of most green facades and roofs are generally based on the use of architectural boxes or stacks of functional layers, or a combination thereof.
    The architectural boxes are hollow compartments forming a network of cavities in which is housed an organic or mineral horticultural substrate. Examples of architectural boxes are described in documents US2113523, FR2601552 A1, and EP2564688 A1.
    The functional layer stacks comprise at least one organic or mineral layer forming a substrate on which it is possible to grow plants. The other layers are generally the same as those used in the construction of traditional non-green facades and roofs, and their main role is to provide thermal insulation and / or water retention functions.
    Examples of organic horticultural or biocompatible substrates are described in documents FR2634971 A1 and DE2733428 A1. Documents JP4660153 and WO2011086518 disclose ceramic substrates.
    The substrate can also be a set of layers based on cement, the formulation of which is adapted to the cultivation of plants. For example, document EP2913440 A1 describes an assembly of layers based on phospho-magnesian cement which can be directly implemented on masonry works in the form of a coating.
    However, these architectural boxes and these layer assemblies are not masonry elements as such. Their mechanical performance is generally insufficient to be part of the structures or load-bearing walls of a building. They must then be applied and fixed on load-bearing structures such as concrete or brick walls or floors. This has several drawbacks.
    First, the realization of masonry works requires additional steps, resulting in an increase in the consumption of materials as well as time and construction costs.
    Then, these solutions have the consequence of increasing the thickness of the walls by adding functional layers which are sometimes redundant with those already implemented on the supporting structure.
    Finally, the cement-based layers can crack under the effect of the root development of the plants in their porosity, if this does not form a network of pores sufficiently open to facilitate the passage of the roots. The risk is a crumbling then a premature detachment of the coatings which these assemblies of layers form on the masonry works.
    On the other hand, masonry blocks made of concrete or based on aggregates with a cementitious binder of the Portland type for the cultivation of plants are also described in the prior art, for example in document JP3565222. These blocks generally have large cavities in which the plants are arranged. The cavities may optionally contain a horticultural substrate.
    However, in the context of experiments aimed at evaluating the biocompatibility of these blocks, it has been found that the lifespan of plants is particularly reduced due to the basicity of the blocks and their low moisture retention capacity. . Indeed, the leaching of the alkaline elements contained in the cementitious binder causes an increase in the pH of the medium surrounding the roots, responsible for the premature death of plants. In addition, the walls forming the cavities of these blocks often have insufficient porosity to allow root development of the plants without cracking. The integrity of the blocks, and a fortiori, their mechanical performance can then be degraded.
    The present invention solves these problems. It relates to a process for manufacturing a block of agglomerated light aggregates using a hydraulic binder, comprising the following steps:
    at. the preparation of an aqueous hydraulic binder composition obtained by mixing at least one acid phosphate, at least one oxide of an alkaline earth metal and water, such as the mass fraction of water in the composition aqueous hydraulic binder is between 0.10 and 0.40, and the mass ratio of alkaline earth metal oxide to acid phosphate is between 0.55 and 1.3;
    b. the incorporation of light aggregates into the aqueous hydraulic binder composition so as to form a granular preparation, such that the mass fraction of the aqueous hydraulic binder composition in the granular preparation is between 0.18 and 0.50;
    vs. shaping the granular preparation;
    d. taking the shaped granular preparation;
    e. hardening of the granular preparation.
    Within the meaning of the invention, the term “block” designates any object comprising light aggregates agglomerated by means of a hydraulic binder whatever the shape of this object. The term "block" should not be restricted to the designation of objects of parallelepiped shape, although the blocks capable of being obtained by the process of the invention may have such a shape.
    The process of the invention makes it possible to manufacture blocks of agglomerated light aggregates having several advantages.
    First, when plants are grown on their surface, the pH of the medium surrounding the roots remains relatively neutral. The phosphates contained in the hydraulic binder can also constitute nutritive fertilizing additions by leaching effect. Plant growth is thus favored and their lifespan is extended.
    Then, the blocks have a network of interconnected pores adapted to root development. Plants can grow while the risk of cracking the block which could damage its integrity remains low.
    The blocks of aggregates produced according to the process of the invention also have a mechanical resistance to compression which is greater, if not at least equal, to that of the blocks of aggregates of the prior art comprising similar aggregates and having a mass proportion of aggregates. / comparable binder. They can therefore be used directly as masonry blocks for the construction of masonry structures without the need for additional functional layers. In other words, the blocks can be used to build walls, facades and exterior floors that can be directly vegetated. They can also be simply incorporated into walls, facades or floors to create decorative green areas.
    That said, depending on the configuration and the functionality sought for masonry structures, the skilled person may nevertheless have to add additional functional systems to provide these structures with functions which are not conferred by the blocks of light aggregates obtained by the method of the invention. For example, it can add sealing means to preserve any other part of the masonry work likely to be sensitive to humidity, or even water supply systems when the risk of runoff can harm plant development. . It can also add means of recovery and / or storage of rainwater.
    According to the invention, an acid phosphate is a salt which, when put in aqueous solution, forms an acid solution. This acid solution can then react with a basic compound, such as an oxide of an alkaline earth metal. In the process of the invention, the relative mass proportions of acid phosphate and of alkaline earth metal oxide are adapted so that the pH of an aqueous medium coming into contact with the hydraulic binder of the blocks is close to the neutrality.
    The acid phosphate can be chosen from:
    at. potassium, sodium, calcium, magnesium, aluminum or ammonium hydrogen phosphates;
    b. potassium, sodium, calcium, magnesium, aluminum or ammonium dihydrogen phosphates.
    Phosphates are fertilizers. Phosphorus is an essential component of molecules like nucleic acids and phospholipids that make up plant cells. A hydraulic binder containing phosphorus is therefore particularly advantageous for forming a medium favorable to the development of plants.
    In a preferred embodiment of the invention, the alkaline earth metal oxide is chosen from magnesium oxide, calcium oxide, magnesium hydroxide and calcium hydroxide. Magnesium and calcium are part of the class of nutrients, called secondary, which are required for healthy plant growth. The hydraulic binder, containing and releasing these elements, helps create an environment around the roots whose characteristics are similar to those they can find in soil favorable to their growth. The mass ratio of alkaline earth metal oxide to acid phosphate is between 0.55 and 1.3, in particular between 0.6 and 1.2, or even between 0.6 and 1.1.
    Light aggregates are granular mineral products whose grains have an alveolar and / or lamellar structure. They are commonly used in the manufacture of molded blocks of cavernous concrete. Light aggregates are characterized by a low bulk bulk density, generally between half and two thirds of the actual density, and a high water absorption power, generally between 10 and 50%, or even between 10 and 30% of the dry weight after immersion for 24 hours. The value of the bulk bulk density is generally between 300 and 1200 kg / m 3 , in particular between 500 and 1000 kg / m 3 , or even between 300 and 600 kg / m 3 . The value of the water absorption capacity, expressed as a percentage of the dry weight after 24 hours of immersion in water, is generally between 10 and 50, or even between 10 and 30.
    The surface of light aggregates can be regular or irregular. Their shape can be diverse: scoriaceae, round, angular, or even exfoliated. Light aggregates can be of natural or artificial origin.
    In the invention, the light aggregates can be chosen from expanded clays, expanded or porous shales, expanded glass, expanded polysilicates, perlite, vermiculite, pumice stones, wood-based aggregates, cellulose-based, cork-based aggregates, alone or in mixtures.
    The shape of the aggregates determines the quantity of hydraulic binder necessary to agglomerate them in the form of a block. In the process of the invention, the mass fraction of the aqueous hydraulic binder composition in the granular preparation is between 0.18 and 0.50, in particular between 0.35 and 0.45.
    Aggregates are generally classified into three granular classes according to their granularity. The granularity is the dimensional distribution of the grains determined by particle size analysis using sieves according to standard NF EN 933-1. The granular distribution of an aggregate is generally qualified by the couple d / D where d is the minimum dimension of the aggregate and D the maximum dimension of the aggregate. Three classes can be distinguished according to the value of the couple d / D:
    the so-called “sands” class, when the couple d / D is 0/3, 0/4 or 0/5;
    the so-called “medium grain” class, when the couple d / D is 3/10, 4/10 or 5/10; the so-called “large grain” class, when the d / D couple is 10/20.
    The value 0 in the “sands” class is a value used by convention in particle size analysis. It serves as the lower bound for the entire range of grain sizes below a certain dimension. For example, the couple 0/3 represents all of the aggregates whose size is less than or equal to 3mm.
    According to one embodiment of the invention, at least 70% by weight of the light aggregates have a granular distribution with a torque value d / D chosen from 0/3, 0/4, 0/5, 3/10, 4 / 10, 5/10 and 10/20, preferably among 3/10, 4/10, 5/10 and 10/20, alone or in combination, and where d is the minimum dimension of the aggregate and D the maximum dimension of aggregate determined by particle size analysis using sieves.
    The aqueous hydraulic binder composition may further comprise an inorganic compound such as alkaline earth metal silicates or alkaline earth metal aluminosilicates. This type of compound promotes the hardening of the hydraulic binder after the setting stage thanks to the formation of hydrated phases. In a particular embodiment of the invention, the aqueous hydraulic binder composition also comprises an inorganic compound chosen from siliceous, aluminosilicates, calcium silicates and calcium aluminosilicates, alone or in mixtures, such as clays calcined, calcined natural or synthetic pozzolana, natural or calcined volcanic ash, kaolins, metakaolins, fly ash from thermal power stations, biomass fly ash, silica fumes, quartz flours, ash from bullet balls rice, blast furnace slag, totally amorphous compounds such as ground soda-lime glasses with high silica content, glass powders, natural or calcined volcanic ash, shales, calcined shales, the mass fraction of said compound mineral in the aqueous composition being less than 0.20, preferably between 0.01 and 0.30.
    The aqueous hydraulic binder composition can advantageously comprise a setting retarding agent.
    In a particular embodiment of the invention, the aqueous hydraulic binder composition further comprises a setting retarding agent which is an AX salt of which:
    at. X represents a cation chosen from alkali metal ions, alkaline earth metal ions, zinc ion, aluminum ion and ammonium ion
    b. A represents an anion chosen from the acetate, citrate, formate, benzoate, tartrate, oleate and oxalate ions.
    Preferably, the mass fraction of the setting retarding agent in the hydraulic binder composition is between 0.001 and 0.05.
    The shaping step of the granular preparation can be carried out according to the usual molding methods for the manufacture of concrete-based masonry blocks. The granular preparation can also be shaped by three-dimensional printing (3D printing).
    The step of setting the granular preparation of the process of the invention can ideally be carried out at room temperature for a period of between 1 and 5 hours.
    Following the step of setting the granular preparation, the process can also comprise a so-called hardening step consisting in allowing the block to "mature" or "rest" for a time which may be several tens of days. During this stage, the chemical reactions within the hydraulic binder continue, the mechanical resistance in bending and in compression of the block of light aggregates increases. In a particular embodiment of the invention, the hardening step is carried out at room temperature for a period of between 1 and 7 days.
    The process of the invention can also comprise, between steps c and d, a step of compacting the granular preparation by vibration. Compaction by vibration generally makes it possible to form a more compact stack of the aggregates of the granular preparation than that which would be obtained without this compacting step. The main advantages are greater dimensional stability of the block, in particular when it undergoes mechanical loads, temperature changes or changes in humidity, as well as greater mechanical resistance to deformation under repeated loads and greater mechanical resistance. at the breakup.
    When the granular preparation is shaped by three-dimensional printing, the process generally does not include an additional step of compacting by vibration.
    In one embodiment of the invention, the granular preparation can also comprise water retenters based on hydrogels, unexpanded clays, sawdust, clay soil, straw, hemp, cellulose fibers or a combination thereof. The water retention and / or moisture capacities of agglomerated light aggregate blocks obtained by the process of the invention must be adjusted according to the type of plants which are likely to be implanted on their surface. For example, succulents, plants of the xerophyte type and certain perennials have lower water requirements than some ornamental plants of the therophyte or bryophyte type. For these, an increase in the water and / or humidity retention capacities of the agglomerated light aggregate blocks may be required. For this, the granular mixture of the process of the invention can comprise water retenters which make it possible to conserve part of the favorable humidity within the blocks of agglomerated light aggregates.
    It is also possible to increase the water retention capacities and / or humidity of the light aggregate blocks obtained by the process of the invention by increasing the porosity
    - 8 internal hydraulic binder. In particular, the aqueous hydraulic binder composition can comprise surfactant compounds called "air entrainers" which then represent 0.05 to 0.2% by weight of the hydraulic binder.
    A second advantage of an increase in the internal porosity of the hydraulic binder is to provide the agglomerated light aggregate blocks with higher resistance against cracking during freeze-thaw cycles. Indeed, the aggregate blocks are partly intended to accommodate plants, and therefore are likely to contain a certain amount of water in liquid form or in the form of vapor necessary for their growth. In some climatic environments, freezing and thawing cycles can cause cycles of ice crystals to form and melt in the blocks. The porosity of the hydraulic binder compensates for changes in volume during the transformation of water into ice.
    In a particular embodiment of the invention, the aqueous preparation of hydraulic binder does not comprise cementitious compounds capable of rendering the medium surrounding the roots basic. In particular, the pH of said medium must not be outside the range of values between 6 and 8, these two values being included in the range.
    The invention also relates to a block of light aggregates agglomerated by means of a hydraulic binder capable of being obtained by the process of the invention.
    Such a block is in particular such that it has a network of interconnected pores forming channels adapted to root development. Plants can grow while the risk of cracking the block remains low. Preferably, the network of interconnected pores represents at least 5% and at most 40% of the volume of the block of light aggregates. Beyond 40% of the volume, the mechanical performance, in particular the mechanical resistance to compression, is likely to be insufficient to authorize the use of the blocks in masonry works, in particular load-bearing works.
    A block of light aggregates capable of being obtained by the process of the invention is generally such that at least 95% of the surface of the light aggregates is covered by the hydraulic binder. Indeed, such coating of the aggregates with the hydraulic binder ensures sufficient cohesion of the aggregates together to give the block mechanical resistance to compression suitable for its use in masonry works.
    In order to promote plant growth, the pH of the medium surrounding their root is preferably neutral. Thus, for a block of light aggregates capable of being obtained by the process of the invention, when it is immersed in demineralized water, the pH of this water, after a period of 24 hours, is between 6 and 9, preferably between 6.5 and 8.5.
    Advantageously, after a period of 90 days, the pH of the water can also be between 6.5 and 10.
    The advantages of the invention are illustrated by the figure and the examples below.
    FIG. 1 is a photograph of the structure of a block of light aggregates agglomerated by means of a hydraulic binder capable of being obtained by the process of the invention.
    FIG. 2 is a graphic representation comparing the displacement load diagram during a mechanical compression test of a block of agglomerated light aggregates obtained by the process of the invention (example 1) and of a block of agglomerated light aggregates according to l 'state of the art (Comparative Example 1).
    FIG. 3 is a photograph of the rupture face of the block of agglomerated light aggregates of FIG. 1 after a mechanical compression test.
    Two types of agglomerated light aggregate blocks were produced. The first type of block (Example 1) was obtained by the method of the invention. The second type of block (Comparative Example 1) was manufactured according to a state-of-the-art process in which the binder is a Portland type cement sold by the company Jura Cernent (CEM 42.5 N). The mass proportions of the constituents of the aqueous binder composition and of the granular preparation are indicated in Table 1. The mass fraction of water in the aqueous hydraulic binder composition and the mass fraction of aqueous hydraulic binder composition in the granular preparation are also shown.
    The granular preparations were molded so as to form blocks with a length of 16 cm and a square section of 4x4 cm so that they could be subjected to mechanical tests in compression. FIG. 1 is a photograph of the structure of such a block of agglomerated light aggregates obtained by the process of the invention.
    The mechanical compression tests were carried out after a 30-day hardening stage. The compression load was applied to a comparable surface for all the blocks. Each compression test is repeated three times on identical samples to verify that the results are representative of the material. Figure 2 is a graphical representation of representative load-displacement diagrams. FIG. 2 compares the changes in the load in Newton as a function of the deformation in millimeters between a block of agglomerated light aggregates obtained by the process of the invention (example 1) and a block of agglomerated light aggregates according to the state of the technical (comparative example 1).
    FIG. 2 shows that the aggregate blocks according to the invention have an elastic resistance and a mechanical resistance greater than the blocks according to the state of the art. For the two blocks, the sudden drop in load is linked to the successive mechanical failures of the light aggregates.
    The mechanical performance in compression of a block of light aggregates obtained by the process of the invention is therefore superior, if not equivalent, to that of a block of light aggregates according to the state of the art with a Portland type cementitious binder. .
    A photograph of the rupture face of the block of agglomerated light aggregates in FIG. 1 after a mechanical compression test is shown in FIG. 3. This photograph shows that the rupture is a rupture of the intra-granular type, that is to say say that the breaking front has passed through the light aggregates. This means that the binder has a higher mechanical resistance to rupture than that of aggregates.
    The pH of the medium likely to surround the roots of the plants in the light aggregate blocks is a parameter making it possible to assess whether said blocks are suitable for being vegetated. For this purpose, the blocks were immersed for several days in demineralized water having a pH between 5.5 and 6 (acidity due to the inevitable presence of carbonic acid by dissolution of carbon dioxide from the air). The pH of the water was then measured using a pH paper after 1 day then 90 days of immersion. The results are shown in Table 1.
    After 1 day of immersion, the pH of the water in which a block of light aggregates obtained by the process of the invention (Example 1) was immersed is 7. On the other hand, the pH of the water in which a block of light aggregates according to the state of the art (comparative example 1) was immersed is 11. After 90 days of immersion, the pH of the water increases to reach values of 8.5 and 13, 5 respectively. The light aggregate blocks obtained by the process of the invention make it possible to maintain a pH relatively close to neutral over the long term.
    These examples show that the invention makes it possible to obtain blocks of light aggregates such that the pH of an aqueous medium coming into contact with the hydraulic binder of the blocks remains close to neutrality, which is not the case for the blocks of the state of the art.
    Table 1
    Example
    Example! ...
    r comparative 1
    Aqueous hydraulic binder composition
    Portland cement - 30.52% MgO 10.36% - KH2PO4 15.09% - Casic> 3 4.55% - anorthosite 4.55% - Calcium oxalate 1.82% - Water 9.08% 23.70%
    Mass ratio of alkaline earth metal oxide to acid phosphate 0.69 Mass fraction of water in the aqueous binder composition 0.20 0.44
    hydraulic
    Granular preparation
    Expanded clays 54.55%
    45.78%
    Mass fraction of aqueous binder composition in 0.45 0.46 granular preparation
    PH 1 day7 11 90 days8.5 13.5
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    claims
    1. Method for manufacturing a block of agglomerated light aggregates using a hydraulic binder, comprising the following steps:
    at. the preparation of an aqueous hydraulic binder composition obtained by mixing at least one acid phosphate, at least one oxide of an alkaline earth metal and water, such as the mass fraction of water in the composition aqueous hydraulic binder is between 0.10 and 0.40, and the mass ratio of alkaline earth metal oxide to acid phosphate is between 0.55 and 1.3;
    b. the incorporation of light aggregates into the aqueous hydraulic binder composition so as to form a granular preparation, such that the mass fraction of the aqueous hydraulic binder composition in the granular preparation is between 0.18 and 0.50;
    vs. shaping the granular preparation;
    d. taking the shaped granular preparation;
    e. hardening of the granular preparation.
    [2" id="c-fr-0002]
    2. The manufacturing method according to claim 1, such that the alkaline earth metal oxide is chosen from magnesium oxide, calcium oxide, magnesium hydroxide and calcium hydroxide.
    [3" id="c-fr-0003]
    3. Manufacturing process according to any one of claims 1 to 2, such that the aqueous hydraulic binder composition further comprises an inorganic compound chosen from siliceous, aluminosilicates, calcium silicates and calcium aluminosilicates, alone or in mixtures, such as calcined clays, calcined natural or synthetic pozzolans, natural or calcined volcanic ash, kaolins, metakaolins, fly ash from thermal power stations, fly ash from biomass, silica fumes, flours from quartz, rice husk ash, blast furnace slag, totally amorphous compounds such as ground soda-lime glasses with high silica content, glass powders, natural or calcined volcanic ash, shales, shales calcined, the mass fraction of said mineral compound in the aqueous composition being less than 0.20, preferably included between 0.01 and 0.30.
    [4" id="c-fr-0004]
    4. Manufacturing process according to any one of claims 1 to 3, such that the acid phosphate is chosen from:
    at. potassium, sodium, calcium, magnesium, aluminum or ammonium hydrogen phosphates;
    b. potassium, sodium, calcium, magnesium, aluminum or ammonium dihydrogen phosphates.
    [5" id="c-fr-0005]
    5. Manufacturing process according to any one of claims 1 to 4, such that the light aggregates are chosen from expanded clays, expanded or porous shales, expanded glass, expanded polysilicates, perlite, vermiculite, stones pumice, wood-based aggregates, cellulose-based aggregates, cork-based aggregates, alone or in mixtures.
    [6" id="c-fr-0006]
    6. Manufacturing process according to any one of claims 1 to 5, such that at least 70% by weight of the light aggregates have a granular distribution with a torque value d / D chosen from 0/3, 0/4, 0/5, 3/10, 4/10, 5/10 and 10/20, preferably among 3/10, 4/10, 5/10 and 10/20, alone or in combination, and where d is the dimension minimum of the aggregate and D the maximum dimension of the aggregate determined by particle size analysis using sieves.
    [7" id="c-fr-0007]
    7. The manufacturing method according to any one of claims 1 to 6, such that the granular preparation may further comprise water retenters based on hydrogels, unexpanded clays, sawdust, clay soil , straw, hemp, cellulose fiber or a combination thereof.
    [8" id="c-fr-0008]
    8. The manufacturing method according to any one of claims 1 to 7, such that the aqueous hydraulic binder composition further comprises a setting retarding agent which is an AX salt of which:
    at. X represents a cation chosen from alkali metal ions, alkaline earth metal ions, zinc ion, aluminum ion and ammonium ion.
    b. A represents an anion chosen from the acetate, citrate, formate, benzoate, tartrate, oleate and oxalate ions.
    [9" id="c-fr-0009]
    9. The manufacturing method according to claim 8, such that the mass fraction of the setting retardant in the hydraulic binder composition is between 0.001 and 0.05.
    [10" id="c-fr-0010]
    10. The manufacturing method according to any one of claims 1 to 9, such that the curing step is carried out at room temperature for a period of between 1 and 7 days.
    [11" id="c-fr-0011]
    11. The manufacturing method according to any one of claims 1 to 10, as it further comprises, between steps c and d, a step of compacting the granular preparation by vibration.
    [12" id="c-fr-0012]
    12. Block of light aggregates agglomerated by means of a hydraulic binder capable of being obtained using the manufacturing process according to any one of claims 1 to 11.
    [13" id="c-fr-0013]
    13. A block of light aggregates according to claim 12, as it has networks of interconnected pores forming channels adapted to the root development of plants.
    [14" id="c-fr-0014]
    14. A block of light aggregates according to any one of claims 12 to 13, such that the interconnected pore networks represent at least 5% and at most 40% of the volume of the block of light aggregates.
    [15" id="c-fr-0015]
    15. Block of light aggregates according to any one of claims 12 to 14, such that, when immersed in demineralized water, the pH of this water, after a period of 24 hours, is included between 6 and 9, preferably between 6.5 and 8.5.
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    同族专利:
    公开号 | 公开日
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    WO2019101692A1|2019-05-31|
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    EP2564688A1|2011-08-30|2013-03-06|Saint-Gogain Cultilene BV|Vegetated panel and associated vegetated wall|CN111592888B|2020-05-27|2021-10-26|海南瑞茗阁实业有限公司|Preparation and construction method of farmland irrigation water-retaining agent|
    CN112723844B|2020-12-28|2022-03-04|南京交通职业技术学院|Light plant-growing type porous concrete prefabricated part and preparation method thereof|
    法律状态:
    2018-11-20| PLFP| Fee payment|Year of fee payment: 2 |
    2019-05-24| PLSC| Publication of the preliminary search report|Effective date: 20190524 |
    2019-11-28| PLFP| Fee payment|Year of fee payment: 3 |
    2020-11-30| PLFP| Fee payment|Year of fee payment: 4 |
    2021-11-30| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1761028|2017-11-22|
    FR1761028A|FR3073841B1|2017-11-22|2017-11-22|PROCESS FOR MANUFACTURING LIGHT VEGETABLE PLANT GRANULATE BLOCKS|FR1761028A| FR3073841B1|2017-11-22|2017-11-22|PROCESS FOR MANUFACTURING LIGHT VEGETABLE PLANT GRANULATE BLOCKS|
    PCT/EP2018/081794| WO2019101692A1|2017-11-22|2018-11-19|Method for producing blocks of lightweight aggregates that can produce a vegetative cover|
    EP18825863.6A| EP3713393A1|2017-11-22|2018-11-19|Method for producing blocks of lightweight aggregates that can produce a vegetative cover|
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