CN114751716B - Artificial stone and preparation method thereof - Google Patents
Artificial stone and preparation method thereof Download PDFInfo
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- CN114751716B CN114751716B CN202210324460.4A CN202210324460A CN114751716B CN 114751716 B CN114751716 B CN 114751716B CN 202210324460 A CN202210324460 A CN 202210324460A CN 114751716 B CN114751716 B CN 114751716B
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- 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
- C04B28/34—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 cold phosphate binders
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- 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
- C04B28/34—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 cold phosphate binders
- C04B28/342—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 cold phosphate binders the phosphate binder being present in the starting composition as a mixture of free acid and one or more reactive oxides
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- 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
- C04B28/34—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 cold phosphate binders
- C04B28/346—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 cold phosphate binders the phosphate binder being present in the starting composition as a mixture of free acid and one or more phosphates
- C04B28/348—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 cold phosphate binders the phosphate binder being present in the starting composition as a mixture of free acid and one or more phosphates the starting mixture also containing one or more reactive oxides
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- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
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- 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
- C04B2111/00017—Aspects relating to the protection of the environment
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- 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
- C04B2111/40—Porous or lightweight materials
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- 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
- C04B2111/54—Substitutes for natural stone, artistic materials or the like
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- 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
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/82—Coloured materials
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- 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
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Abstract
The application relates to the technical field of energy conservation and environmental protection, and provides an artificial stone, which comprises the following components in percentage by weight based on 100% of the total weight of the artificial stone: 50-80% of solid waste containing calcium carbonate, 15-25% of acid liquid and 5-25% of modifying reinforcing agent. The artificial stone provided by the application contains 50-80% of solid waste containing calcium carbonate and 15-25% of acid liquid, wherein a part of solid waste containing calcium carbonate reacts with the acid liquid to release carbon dioxide, so that the slurry is foamed and expanded to fill the whole die, and the rest solid waste containing calcium carbonate plays a role in framework and filling; the modified reinforcing agent with the content of 5-25% reacts with the acidic liquid to generate a cementing material with high strength, so that the slurry is rapidly solidified and hardened, the slurry can be self-inflated and self-filled to form without adding a foaming agent, and a die with any shape and structure can be customized according to the actual application requirement, so that artificial stone meeting the requirement can be produced in batches.
Description
Technical Field
The application belongs to the technical field of energy conservation and environmental protection, and particularly relates to an artificial stone and a preparation method thereof.
Background
China is the largest building material production and consumption country in the world, and the building material industry is one of industries with larger carbon emission. The adoption of the practical and powerful measures and the full-force carbon pushing and emission reduction work have great significance in achieving the carbon peak target in advance, and the ' fourteen-five ' raw material industry development planning ' proposes to comprehensively push the solid waste comprehensive utilization of the raw material industry. Limestone powder and papermaking white mud are by-products discharged in mineral processing and papermaking processes respectively, shell slag is remains of marine organisms, and the main components of the limestone powder and papermaking white mud areCaCO 3 The powder has low activity, and it is difficult to directly form a gelatinous substance. Likewise, the main component is CaCO 3 Marble, slate, etc. are excellent natural stone materials and are widely used for high-grade building decoration. However, natural stone has the defects of poor processability, low production efficiency, high density and environmental damage caused by excavation, and does not meet the requirements of carbon emission reduction work and green building materials.
Disclosure of Invention
The purpose of the application is to provide an artificial stone and a preparation method thereof, and aims to solve the problems that the existing artificial stone cannot be self-foamed and self-filled and cannot be customized to meet various application scenes.
In order to achieve the purposes of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides an artificial stone, where the total weight of the raw material components of the artificial stone is 100%, and the raw material components include the following components in percentage by weight:
in a second aspect, the present application provides a method for preparing an artificial stone, comprising the steps of:
providing a raw material component in the artificial stone;
mixing the raw material components to obtain slurry;
and (3) injecting the slurry into a mould for first curing treatment, and demoulding for second curing treatment to obtain the artificial stone.
The artificial stone provided by the first aspect of the application contains 50-80% of solid waste containing calcium carbonate and 15-25% of acid liquid, wherein part of calcium carbonate in the solid waste containing calcium carbonate reacts with the acid liquid to release carbon dioxide, so that the slurry is foamed and expanded, the whole mold is filled with the slurry, and the rest of solid waste containing calcium carbonate plays a role in skeleton and filling; the modified reinforcing agent with 5-25% reacts with the acid liquid to generate a cementing material with very high strength, so that the slurry is quickly coagulated and hardened, and the strength of the artificial stone is improved. The foaming agent is not required to be added, so that the slurry can be automatically foamed and expanded, vibration-free automatic filling and forming are realized, and therefore, the mould with any shape and structure can be customized according to the actual application requirement, and artificial stones meeting the requirement can be produced in batches. In addition, the value-added reuse of the solid waste containing calcium carbonate, which is difficult to directly form the gel substance, is realized.
According to the preparation method of the artificial stone, firstly, raw material components are mixed to obtain slurry, then the slurry is injected into a die to perform first curing treatment, and after demolding, second curing treatment is performed to obtain the artificial stone. The preparation process is simple to operate, can be expanded by self-foaming through one-time injection, and can be self-filled and molded without vibration. Therefore, according to the practical application requirement, the mould with any shape is customized, the solid waste containing the calcium carbonate which is difficult to be directly poured into the cementing material can be produced in batches, and the artificial stone meeting the requirement is low in cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a process for preparing an artificial stone according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In this application, the term "and/or" describes an association relationship of an association object, which means that there may be three relationships, for example, a and/or B may mean: a alone, a and B together, and B alone. Wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.
In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, "at least one (individual) of a, b, or c," or "at least one (individual) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple, respectively.
It should be understood that, in various embodiments of the present application, the sequence number of each process does not mean that the sequence of execution is sequential, and some or all of the steps may be executed in parallel or sequentially, where the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weights of the relevant components mentioned in the embodiments of the present application may refer not only to specific contents of the components, but also to the proportional relationship between the weights of the components, and thus, any ratio of the contents of the relevant components according to the embodiments of the present application may be enlarged or reduced within the scope disclosed in the embodiments of the present application. Specifically, the mass described in the specification of the examples of the present application may be a mass unit known in the chemical industry such as μ g, mg, g, kg.
The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated for distinguishing between objects such as substances from each other. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
The first aspect of the embodiments of the present application provides an artificial stone, wherein the total weight of raw material components of the artificial stone is 100%, and the raw material components include the following components in percentage by weight:
the artificial stone provided by the embodiment of the application contains 50-80% of solid waste containing calcium carbonate and 15-25% of acid liquid, wherein part of calcium carbonate in the solid waste containing calcium carbonate reacts with the acid liquid to release carbon dioxide, so that the slurry is foamed and expanded, the whole mold is filled with the slurry, and the rest solid waste containing calcium carbonate plays a role in skeleton and filling; the modified reinforcing agent with 5-25% reacts with the acid liquid to generate a cementing material with very high strength, so that the slurry is quickly coagulated and hardened, and the strength of the artificial stone is improved. The foaming agent is not required to be added, so that the slurry can be automatically foamed and expanded, vibration-free automatic filling and forming are realized, and therefore, the mould with any shape and structure can be customized according to the actual application requirement, and artificial stones meeting the requirement can be produced in batches. In addition, the value-added reuse of the solid waste containing calcium carbonate, which is difficult to directly form the gel substance, is realized.
In an embodiment, the raw material component of the artificial stone contains 50-80% of solid waste containing calcium carbonate. The solid waste is solid waste, and refers to solid and semi-solid waste materials produced by human beings in production, consumption, life and other activities. Mainly comprises solid particles, garbage, slag, sludge, waste articles, broken vessels, defective products, animal carcasses and the like. And adding solid waste containing calcium carbonate, wherein a part of the solid waste reacts with the acidic liquid, and the calcium carbonate contained in the solid waste is excited to release carbon dioxide gas, so that the slurry is foamed and expanded, the whole mould can be completely filled, the rest of the solid waste plays a role in skeleton and filling, and is continuously coagulated and hardened under the action of a cementing material formed by a modifying reinforcing agent and the acidic liquid, so that the solid waste containing calcium carbonate which is difficult to directly pour and form is injected once, and the artificial stone is formed by rapid self-foaming and filling. In particular embodiments, the percentage of solid waste containing calcium carbonate may be, but is not limited to, 50%,55%,60%,65%,70%,75%,80%. In the percentage content range of the solid waste containing calcium carbonate provided by the embodiment, a part of the solid waste containing calcium carbonate can react with the acid liquid, and the rest of the solid waste containing calcium carbonate plays a role in skeleton and filling, so that the foaming rate of the slurry is proper, and the matrix void ratio of the artificial stone is proper, so that the comprehensive performance of the artificial stone is optimal.
In an embodiment, the solid waste comprising calcium carbonate comprises at least one of limestone powder, papermaking white mud, shell slag. According to the embodiment, limestone powder which is a byproduct discharged by mineral processing, papermaking white mud which is a byproduct discharged by a papermaking white mud process and remains of marine organisms are fully used, so that the value-added recycling of solid waste containing calcium carbonate which is difficult to directly pour and form is realized, and the method is low in cost and environment-friendly. The mesh size of the solid waste containing calcium carbonate is at least 50 mesh. In a specific embodiment, the solid waste containing calcium carbonate may be limestone powder having a mesh size of 50 mesh or 100 mesh. The solid waste containing calcium carbonate can also be papermaking white mud with the mesh granularity of 50 meshes or 100 meshes. The solid waste containing calcium carbonate can also be limestone powder with the mesh granularity of 50 meshes or 100 meshes and papermaking white mud.
In an embodiment, the raw material component of the artificial stone contains 15-25% of an acidic liquid. Adding acidic liquid, wherein a part of the acidic liquid reacts with solid waste containing calcium carbonate, and the calcium carbonate contained in the solid waste is excited to release carbon dioxide gas, so that slurry foaming expansion self-filling is realized; the rest acidic liquid reacts with the modification reinforcing agent to generate a cementing material with high strength, so that the strength of the artificial stone can be improved. In addition, the water contained in the acidic liquid can also provide hydration reaction conditions. In particular embodiments, the percentage of acidic liquid may be, but is not limited to, 15%,17%,19%,20%,22%,24%,25%. In the range of the percentage of the acidic liquid provided by the embodiment, the comprehensive performance of the artificial stone is optimal.
In an embodiment, the acidic liquid comprises at least one of phosphoric acid solution, oxalic acid solution, industrial acidic liquid waste. In a specific embodiment, the acidic liquid may be a phosphoric acid solution. The acidic liquid may also be an oxalic acid solution. The acidic liquid may also include phosphoric acid solution, oxalic acid solution.
In an embodiment, the raw material component of the artificial stone contains 5-25% of the modifying enhancer. The modified reinforcing agent is a substance which can react with acidic liquid to generate a strong gelling product, and is mainly a mineral admixture containing aluminum, iron and calcium phases, wherein the mineral admixture containing aluminum, iron and calcium phases comprises industrial wastes such as red mud, steel slag and the like, and mineral admixture such as bauxite, metakaolin and the like. The modified reinforcing agent is added to react with the acidic liquid to generate a cementing material with very high strength, so that the slurry can be quickly solidified and hardened, and the strength of the artificial stone can be improved. In particular embodiments, the percentage of modifying enhancer may be, but is not limited to, 5%,7%,9%,11%,15%,20%,25%. In the percentage content range of the modified reinforcing agent provided by the embodiment, the strength of the artificial stone material is optimal.
In an embodiment, the modifying enhancer comprises at least one of red mud, bauxite, metakaolin. In a specific embodiment, the modifying enhancer may be red mud; the modifying and reinforcing agent can also be bauxite; the modification enhancer may also include red mud and metakaolin.
In an embodiment, the artificial stone further comprises 0-6% of a set control agent. When the content of the solid waste or the acidic liquid containing the calcium carbonate is just right, namely the reaction quantity of the solid waste containing the calcium carbonate and the acidic liquid is not too large, the foaming expansion rate is controlled without adjusting the reaction speed of the acidic liquid and the solid waste containing the calcium carbonate, and at the moment, the raw material components of the artificial stone can be added with no coagulant, namely the percentage content of the coagulant is 0%. When the content of the solid waste containing calcium carbonate or the acid liquid is too large, namely, the reaction quantity of the solid waste containing calcium carbonate and the acid liquid is too large, a coagulant is required to be added to adjust the reaction speed of the acid liquid and the solid waste containing calcium carbonate and the modification enhancer, so that the reaction speed of the acid liquid and the solid waste containing calcium carbonate is moderate, the foaming expansion rate is proper, and the comprehensive performance of the artificial stone can be improved. The concrete percentage of the coagulant can be adjusted according to the product requirements of the artificial stone, the process, the concentration of the acid liquid, the particle fineness of the solid waste containing calcium carbonate and the like. In particular embodiments, the percentage of coagulant may be, but is not limited to, 0%,1%,2%,3%,4%,5%,6%.
In an embodiment, the set-adjusting agent comprises at least one of borax, sodium tripolyphosphate, and an organic phosphate. Wherein the organic phosphate comprises at least one of ethylene diamine-tetramethyl phosphonic acid, amino trimethyl phosphonic acid and ethylene polyamine alkyl phosphine.
In the embodiment, the raw material components comprise the following components in percentage by weight, based on 100% of the total weight of the raw material components of the artificial stone:
the artificial stone of the embodiment is a structural heat-insulating light artificial stone.
In the embodiment, the raw material components comprise the following components in percentage by weight, based on 100% of the total weight of the raw material components of the artificial stone:
the artificial stone of the embodiment is a light-weight artificial stone.
In the embodiment, the raw material components comprise the following components in percentage by weight, based on 100% of the total weight of the raw material components of the artificial stone:
the artificial stone of the embodiment is a heat-insulating light artificial stone.
In the examples, the apparent density of the artificial stone is 450-1600kg/m 3 The compressive strength is 4.5-15.0MP, and the heat conductivity coefficient is 0.05-0.40W/mK. When the apparent density of the artificial stone is 450-800kg/m 3 When the compressive strength is 4.5-5.0MP and the heat conductivity coefficient is 0.05-0.40W/mK, the artificial stone can be used for a thermal insulation building envelope or a thermal structure. When the apparent density of the artificial stone is 800-1400kg/m 3 When the compressive strength is 5-15MP and the thermal conductivity is 0.05-0.40W/mK, the artificial stone can be used for the building envelope which is used for bearing and preserving heat. When the apparent density of the artificial stone is 1400-1600kg/m 3 When the compressive strength is 15MP, the artificial stone can be used for bearing members or structures.
A second aspect of the embodiments of the present application provides a method for manufacturing an artificial stone, including the following steps:
s10: providing a raw material component in the artificial stone; s20: mixing the raw material components to obtain slurry;
s30, injecting the slurry into a mold for first curing treatment, and demolding for second curing treatment to obtain the artificial stone.
According to the preparation method of the artificial stone, firstly, raw material components are mixed to obtain slurry, then the slurry is injected into a die to perform first curing treatment, and after demolding, second curing treatment is performed to obtain the artificial stone. The preparation process is simple to operate, can be expanded by self-foaming through one-time injection, and can be self-filled and molded without vibration. Therefore, according to the practical application requirement, the mould with any shape is customized, the solid waste containing the calcium carbonate which is difficult to be directly poured into the cementing material can be produced in batches, and the artificial stone meeting the requirement is low in cost.
In step S10, the raw material components of the artificial stone according to the above examples provide solid waste of calcium carbonate, acidic liquid, modifying enhancer, coagulant-adjusting agent.
In step S20, the mixing process includes: at 25 ℃, the modifying enhancer and the solid waste containing the calcium carbonate are firstly mixed, and then the acidic liquid is added and stirred for 1-5min. Or mixing the coagulant, the modifying enhancer and the solid waste containing calcium carbonate at 25 ℃, and then adding the acidic liquid and stirring for 1-5min.
In step S30, the mold may be a mold of any structure customized according to the actual application requirements. In the examples, the volume ratio of slurry to mold was 1: (1-5) injecting the slurry into a mold. The volume ratio of the slurry to the mould can be specifically adjusted according to the strength requirement of the artificial stone. In a specific embodiment, the volume ratio of slurry to mold may be, but is not limited to, 1:1,1:2,1:3,1:4,1:5.
in the embodiment, the temperature of the first curing treatment is 25-80 ℃ and the time is 30-60min. Specifically, the time of the first curing treatment may be adjusted according to the temperature of the first curing treatment. For example, the time of the first curing treatment is adjusted according to the air room temperature curing or the steam curing at 40-80 ℃. Room temperature, also referred to as normal temperature, is generally defined as 25 ℃. In the present application, room temperature is defined as 25 ℃ ±5℃. In a specific embodiment, the temperature of the first curing treatment may be 25 ℃ for 60 minutes. The temperature of the first curing treatment can be 60 ℃ and the time is 40min. The temperature of the first curing treatment can be 80 ℃ and the time is 30min. In the temperature and time range of the first curing treatment provided by the embodiment, the artificial stone is easy to demold and the production efficiency is high.
In an embodiment, the second curing treatment is performed at a temperature of 25-80℃for a period of 1-5 days. The time of the second curing treatment can be specifically adjusted according to the temperature of the second curing treatment. For example, the time of the second curing treatment is adjusted according to the air room temperature curing or the steam curing at 60-80 ℃. In a specific embodiment, the temperature of the second curing treatment may be 25 ℃ for 4 days. The temperature of the second curing treatment can also be 60 ℃ for 3 days. The temperature of the second curing treatment may also be 80℃for 1 day. In the temperature and time range of the second curing treatment provided by the embodiment, the processing time of the artificial stone is short, the production efficiency is high, and the product turnover is fast.
The following description is made with reference to specific embodiments.
Example 1
The embodiment provides an artificial stone and a preparation method thereof.
An artificial stone comprises the following raw material components in percentage by weight:
80% of limestone powder with 100 meshes
15% of phosphoric acid solution with concentration of 55%
Metakaolin 5%.
A method for preparing artificial stone, comprising the following steps:
s10: the artificial stone according to the present embodiment comprises raw material components providing limestone powder, phosphoric acid solution, metakaolin;
s20: firstly, uniformly mixing limestone powder and metakaolin, and then adding a phosphoric acid solution to rapidly stir for 2min to obtain slurry;
s30: and injecting the slurry into a mould for room temperature air curing for 1h, and demoulding for room temperature air curing for 5 days to obtain the artificial stone.
The apparent density of the artificial stone is 450kg/m 3 The compressive strength is 4.5MPa, the heat conductivity coefficient is 0.05W/mK, and the heat-insulating light artificial stone is obtained.
Example 2
The embodiment provides an artificial stone and a preparation method thereof.
An artificial stone comprises the following raw material components in percentage by weight:
a method for preparing artificial stone, comprising the following steps:
s10: the artificial stone according to the present embodiment comprises raw material components providing papermaking white mud, shell slag, phosphoric acid solution, oxalic acid solution, bauxite, metakaolin and organic phosphate;
s20: uniformly mixing papermaking white mud, shell slag, bauxite, metakaolin and organic phosphate, and then adding a phosphoric acid solution and an oxalic acid solution to rapidly stir for 2min to obtain slurry;
s30: and (3) injecting the slurry into a mould for steam curing at 60 ℃ for 30min, and then demoulding for steam curing at 60 ℃ for 1 day to obtain the artificial stone.
The apparent density of the artificial stone is 1000kg/m 3 The compressive strength is 9.6MPa, the heat conductivity coefficient is 0.15W/mK, and the heat-insulating lightweight artificial stone is of a structure.
Example 3
The embodiment provides an artificial stone and a preparation method thereof.
An artificial stone comprises the following raw material components in percentage by weight:
a method for preparing artificial stone, comprising the following steps:
s10: the artificial stone according to the embodiment comprises raw material components including limestone powder, shell slag, phosphoric acid solution, acidic phosphorus-containing waste liquid, metakaolin, borax and sodium tripolyphosphate;
s20: firstly, uniformly mixing limestone powder, shell slag, metakaolin, borax and sodium tripolyphosphate, then adding a phosphoric acid solution and an acidic phosphorus-containing waste liquid, and rapidly stirring for 2min to obtain slurry;
s30: and injecting the slurry into a mould for air room temperature curing for 30min, and then demoulding for air room temperature curing for 3 days to obtain the artificial stone.
The apparent density of the artificial stone is 1500kg/m 3 The compressive strength is 13.5MPa, the heat conductivity coefficient is 0.35W/mK, and the artificial stone is light in structure.
Example 4
The embodiment provides an artificial stone and a preparation method thereof.
An artificial stone comprises the following raw material components in percentage by weight:
a method for preparing artificial stone, comprising the following steps:
s10: the artificial stone according to the embodiment comprises raw material components including papermaking white mud, shell slag, phosphoric acid solution, acidic phosphorus-containing waste liquid and red mud;
s20: uniformly mixing papermaking white mud, shell slag and red mud, then adding a phosphoric acid solution and an acidic phosphorus-containing waste liquid, and rapidly stirring for 2min to obtain slurry;
s30: and (3) injecting the slurry into a mould for steam curing at 80 ℃ for 30min, and then demoulding for steam curing at 80 ℃ for 1 day to obtain the artificial stone.
Through detection, the apparent density of the artificial stone is 1600kg/m 3 The compressive strength is 15MPa, the heat conductivity coefficient is 0.4W/mK, and the artificial stone is light red in structure.
Comparative example 1
The comparative example provides an artificial stone and a preparation method thereof.
An artificial stone comprises the following raw material components in percentage by weight:
55% of limestone powder with 100 meshes
Portland cement binder 20%
15% of water
A method for preparing artificial stone, comprising the following steps:
s10: the artificial stone according to the present comparative example comprises raw material components of limestone powder, portland cement binder, water;
s20: mixing limestone powder and silicate cement adhesive, and then adding water to rapidly stir for 2min to obtain slurry;
s30: and (3) injecting the slurry into a mould for steam curing at 60 ℃ for 1 day, and then demoulding for steam curing at 60 ℃ for 7 days to obtain the artificial stone.
The apparent density of the artificial stone is 1900kg/m 3 The compressive strength is 14.3MPa, the heat conductivity coefficient is 0.82W/mK, and the building artificial stone material.
Comparative example 2
The comparative example provides an artificial stone and a preparation method thereof.
An artificial stone comprises the following raw material components in percentage by weight:
a method for preparing artificial stone, comprising the following steps:
s10: the artificial stone according to the embodiment comprises raw material components including limestone powder, shell slag, phosphoric acid solution, acidic phosphorus-containing waste liquid, borax, sodium tripolyphosphate and fine sand;
s20: firstly, uniformly mixing limestone powder, shell slag, borax, sodium tripolyphosphate and fine sand, then adding a phosphoric acid solution and an acidic phosphorus-containing waste liquid, and rapidly stirring for 2min to obtain slurry;
s30: and injecting the slurry into a mould for air room temperature curing for 30min, and demoulding for air room temperature curing for 4 days to obtain the artificial stone.
The apparent density of the artificial stone is 1650kg/m 3 The compressive strength is 10.6MPa, the heat conductivity coefficient is 0.44W/mK, and the artificial stone is used for building.
Correlation performance detection comparative analysis:
TABLE 1
| Group of | Maintenance cycle | Apparent density of | Compressive Strength | Coefficient of thermal conductivity |
| Example 1 | Air curing at room temperature for 5 days | 450kg/m 3 | 4.5MPa | 0.05W/mK |
| Example 2 | Steam curing at 60 ℃ for 1 day | 1000kg/m 3 | 9.6MPa | 0.15W/mK |
| Example 3 | Air curing at room temperature for 3 days | 1500kg/m 3 | 13.5MPa | 0.35W/mK |
| Example 4 | Steam curing at 80 ℃ for 1 day | 1600kg/m 3 | 15.0MPa | 0.40W/mK |
| Comparative example 1 | Steam curing at 60 ℃ for 7 days | 1900kg/m 3 | 14.3MPa | 0.82W/mK |
| Comparative example 2 | Air curing at room temperature for 4 days | 1650kg/m 3 | 10.6MPa | 0.44W/mK |
Table 1 shows the apparent density, compressive strength and thermal conductivity of the artificial stone materials provided in examples 1-4 and comparative examples 1-2. As can be seen from Table 1, the apparent density of the artificial stone provided in examples 1-4 is small, whereas the apparent density of the artificial stone provided in comparative examples 1-2 is large, because the raw material components of the artificial stone provided in comparative examples 1-2 cannot realize spontaneous expansion, so that the apparent density is large, the thermal conductivity is large, and the reactivity of calcium carbonate contained in solid wastes cannot be excited, which requires the incorporation of a portland cement binder to realize setting and hardening. Example 3 has a smaller apparent density and a greater compressive strength than comparative example 2, indicating that the raw material component of example 3 contains a modifying enhancer to enhance the compressive strength of the artificial stone.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (9)
1. The artificial stone is characterized in that the total weight of the raw material components of the artificial stone is 100 percent, and the raw material components comprise the following components in percentage by weight:
50-80% of solid waste containing calcium carbonate
15-25% of acid liquid
5-25% of modified reinforcing agent
0-6% of coagulant regulator;
the acidic liquid comprises at least one of phosphoric acid solution, oxalic acid solution and industrial acidic liquid waste;
the modified reinforcing agent comprises at least one of red mud, bauxite and metakaolin;
the apparent density of the artificial stone is 450-1600kg/m 3 The compressive strength is 4.5-15.0MP, and the heat conductivity coefficient is 0.05-0.40W/mK;
the preparation method of the artificial stone comprises the following steps:
providing the raw material components in the artificial stone;
mixing the raw material components to obtain slurry;
injecting the slurry into a mould to perform first curing treatment, and then demolding to perform second curing treatment to obtain the artificial stone;
the artificial stone is not added with foaming agent.
2. The artificial stone of claim 1, wherein the raw material composition comprises:
60-70% of solid waste containing calcium carbonate
15-25% of acid liquid
10 to 15 percent of modified reinforcing agent
3-5% of coagulant regulator.
3. The artificial stone according to claim 1, wherein the calcium carbonate-containing solid waste comprises at least one of limestone powder, papermaking white mud, and shell slag; and/or
The setting agent comprises at least one of borax, sodium tripolyphosphate and organic phosphate.
4. The artificial stone of claim 3, wherein the organic phosphate in the coagulant-regulator comprises at least one of ethylene diamine-tetramethyl phosphonic acid, amino trimethyl phosphonic acid, ethylene polyamine alkyl phosphine.
5. The artificial stone according to any one of claims 1 to 4, wherein the mesh size of the calcium carbonate-containing solid waste is at least 50 mesh; and/or
The mesh size of the modifying enhancer is at least 100 mesh; and/or
The mesh size of the set forth is at least 100 mesh.
6. The preparation method of the artificial stone is characterized by comprising the following steps of:
providing the raw material component in the artificial stone according to any one of claims 1 to 5;
mixing the raw material components to obtain slurry;
injecting the slurry into a mould to perform first curing treatment, and then demolding to perform second curing treatment to obtain the artificial stone;
the artificial stone is not added with foaming agent.
7. The method of claim 6, wherein the first curing treatment is carried out at a temperature of 25-80℃for a period of 30-60 minutes.
8. The method of claim 6, wherein the second curing treatment is carried out at a temperature of 25-80℃for a period of 1-5 days.
9. The production method according to any one of claims 6 to 8, wherein the mixing treatment comprises: mixing the coagulant, the modifying enhancer and the solid waste containing calcium carbonate at 25 ℃, and then adding the acidic liquid and stirring for 1-5min.
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR6786948D0 (en) * | 1966-02-23 | 1973-02-15 | Univ New York | PROCESS FOR PRESERVING LIMESTONE STRUCTURES |
| JP4240638B2 (en) * | 1999-02-26 | 2009-03-18 | Ｊｆｅスチール株式会社 | Manufacturing method of artificial stone |
| CN103922674B (en) * | 2014-04-10 | 2015-07-08 | 山东建筑大学 | Method for producing light-weight wall material by using papermaking white clay |
| CN104129809B (en) * | 2014-07-27 | 2016-02-17 | 许盛英 | Calcium carbonate after acidifying |
| WO2016133463A1 (en) * | 2015-02-17 | 2016-08-25 | Nanyang Technological University | Method of manufacturing a lightweight material |
| CN109824331B (en) * | 2019-04-03 | 2021-10-22 | 四川新磷环保技术有限公司 | Method for preparing light composite artificial stone profile by using yellow phosphorus slag |
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