CN-122010471-A - Polyolefin ester/slag-based green artificial granite

Abstract

The invention discloses a polyolefin ester/slag-based green artificial granite, which is prepared by taking heavy calcium carbonate as aggregate, taking factory slag as an inorganic binder, taking ethylene-ethyl acrylate as an organic binder, mixing, stirring, pressing, demolding and curing. The method has the advantages of low production cost, quick drying, energy conservation, environmental protection, no traditional aromatic styrene, benzaldehyde, ethylbenzene, styrene oxide Volatile Organic Compounds (VOCs) solvents and the like, and the prepared artificial granite has the advantages of environmental protection compared with the unsaturated polyester artificial granite, has the characteristics of high strength (more than or equal to 124 MPa), low water absorption (less than or equal to 0.1 percent) and quick solidification, and is suitable for building structural members and decorative stones.

Inventors

• WANG LINLIN
• CHEN QUAN
• CHEN XIAOPENG
• LIANG JIEZHEN
• LAN HAIHUA
• WEI XIAOJIE

Assignees

• 广西大学

Dates

Publication Date

20260512

Application Date

20260210

Claims (9)

1. 1. A polyolefin ester/slag-based green artificial granite is characterized in that heavy calcium carbonate is used as aggregate, factory slag is used as an inorganic binder, ethylene-ethyl acrylate is used as an organic binder, and the high-performance green artificial granite is prepared through mixing, stirring, pressing, demoulding and curing.
2. 2. The polyolefin ester/slag-based green artificial granite of claim 1, wherein the composition, in parts by weight, comprises the following components: Heavy calcium carbonate 50-70 Parts Slag (slag) 30-50 Parts Alkali-activated agent 5-20 Parts Ethylene-acrylic acid ethyl ester 1-5 Parts Solvent(s) 5-10 Parts Methyltrimethoxysilane 0.5-1 Part Fiber 2-7 Parts
3. 3. The polyolefin ester/slag based green artificial granite as set forth in claim 2, wherein the alkali-activator is liquid sodium silicate having a modulus of 1.4-1.8.
4. 4. The polyolefin ester/slag-based green artificial granite according to claim 2, wherein the solvent is one of methanol, ethanol, petroleum ether or dimethyl ether, and the fiber is carbon fiber with diameter of 0.1mm and length of 10 mm.
5. 5. The polyolefin ester/slag-based green artificial granite as set forth in claim 2, wherein the heavy carbonic acid is obtained by pulverizing and sieving, selecting a grain size ranging from 20 to 160 meshes, drying at 100 ℃ until the water content is less than 1%, and the slag is obtained by pulverizing and sieving, selecting a grain size not more than 1200 meshes, drying at 100 ℃ until the water content is less than 1%.
6. 6. The polyolefin ester/slag-based green artificial granite according to claim 2, wherein the heavy carbonic acid is 60-70 parts, the slag is 30-40 parts, the ethylene-ethyl acrylate is 2-4 parts, the alkali activator is 15-20 parts, and the modulus is 1.5-1.6.
7. 7. The process for producing a polyolefin ester/slag-based green artificial granite as set forth in any of claims 1-6, comprising the following steps: (1) Weighing 50-70 parts of heavy calcium carbonate, 30-50 parts of slag, 5-20 parts of alkali excitant, 1-5 parts of ethylene-ethyl acrylate, 5-10 parts of solvent, 0.5-1 part of methyltrimethoxysilane and 2-7 parts of fiber according to the weight ratio; (2) Weighing the heavy calcium carbonate, slag and fibers obtained in the step (1), mixing the heavy calcium carbonate, slag and fibers at a stirring speed of 150-300 r/min, adding the ethylene-ethyl acrylate obtained in the step (1) into the uniformly mixed slurry, and continuously stirring to uniformly mix the ethylene-ethyl acrylate with the slurry to obtain mixed slurry; (3) Adding the alkali excitant obtained in the step (1) into the mixed slurry obtained in the step (2), uniformly mixing at a stirring speed of 150-300r/min, adding the solvent obtained in the step (1), then adding the methyltrimethoxysilane obtained in the step (1), stirring at a stirring speed of 150-300r/min, adding the stirred slurry into a mould, vibrating and pressing under a vacuum condition to form, curing the formed artificial granite, demoulding, and continuously curing in an environment with a temperature of 40-80 ℃ and a humidity of more than or equal to 90%, thereby obtaining the polyolefin ester/slag-based green artificial granite.
8. 8. The method for producing polyolefin ester/slag-based green artificial granite according to claim 7, wherein the molded artificial granite is left to stand in an atmosphere of 25℃in step (3) and then is subjected to curing for 24h and then to demolding.
9. 9. The method for preparing polyolefin ester/slag-based green artificial granite as set forth in claim 7, wherein the vacuum condition in the step (3) is vacuum degree-0.090 MPa, and the maintenance is continued in the environment with a temperature of 50 ℃ and a humidity of 90% or more after demoulding in the step (3).

Description

Polyolefin ester/slag-based green artificial granite Technical Field The invention relates to the technical field of artificial granite, in particular to a polyolefin ester/slag-based green artificial granite. Background With the growing demand for global architecture and decorative materials, natural stone materials (such as marble, granite, etc.) have long taken an important role in the field of architecture decoration. However, the large-scale exploitation and utilization of natural stone as a non-renewable resource has gradually revealed various problems. On one hand, the excessive exploitation causes the gradual exhaustion of resources and causes serious problems of water and soil loss, ecological damage, environmental pollution and the like, and on the other hand, the natural stone has high energy consumption and high cost in the exploitation, processing and transportation processes, and a large amount of waste crushed aggregates and dust are generated in the processing process, so that double pressure is caused to the environment and the resources. Therefore, the development of natural stone substitute materials is an important subject to be solved in the building and decoration industries. Under the trend of green, environment-friendly and sustainable development, artificial granite is gradually becoming an important substitute for natural stone due to its excellent performance and strong designability. The artificial granite is generally prepared by using solid wastes such as crushed natural stone, stone powder and the like as aggregate, adding cementing agent, and performing the procedures of molding, curing, polishing and the like. The material can effectively utilize construction waste, reduce cost, realize rich color and texture design by regulating and controlling raw material proportion, and is widely applied to the fields of building interior decoration, table board, ground pavement and the like. The existing artificial granite is mainly divided into three types of resin type, inorganic type and composite type. The resin artificial granite is prepared by taking Unsaturated Polyester Resin (UPR) and acrylic resin as cementing agents and molding stone powder and crushed aggregates under vacuum and high pressure conditions. The artificial granite has low water absorption, higher bending resistance and better overall compactness, and can avoid the defects of natural stone caused by high porosity and strong brittleness. However, resin artificial granite has obvious defects that firstly, the surface hardness and the wear resistance are poor, scratches and polishing marks are easy to generate in use, secondly, volatile Organic Compounds (VOCs) such as styrene, benzaldehyde and the like can be continuously released in the production, solidification and use processes, the environment is polluted, the threat to human health is formed, thirdly, resin materials such as UPR and the like are not degradable, are difficult to naturally decompose even after being mixed with aggregate for a long time, and cause a solid waste burden which is difficult to treat. These problems severely restrict the development of greenness of resin type artificial granite. The inorganic artificial granite is made up by using crushed natural granite as main raw material and adopting cement cementing agent (such as silicate cement, aluminate cement or magnesium oxychloride cement) and adopting the processes of mixing, mould pressing and curing. The composite material has the advantages of low production cost, simple process, good weather resistance and chemical stability, and outstanding performance in outdoor application. In addition, the inorganic cementing agent has wide sources and meets the green sustainable development requirement. But the strength of the material is lower (the compressive strength is generally between 40 and 60 MPa) and is obviously lower than that of resin artificial granite (about 80 to 100 MPa), and the artificial granite is easy to crack and generate cracks under the application scene of high temperature and high pressure due to brittleness, and meanwhile, the material has poor impact resistance, is easy to damage in use, has insufficient surface hardness, is easy to scratch and wear, has difficult color and texture regulation and control in terms of decoration, has higher density and is inconvenient to splice and process. These drawbacks limit the use of inorganic artificial granite in the field of high-end decoration. The composite artificial granite combines the advantages of organic resin and inorganic cementing agent, and generally shows higher mechanical strength and durability. The compressive strength and the bending strength of the composite artificial granite are obviously higher than those of natural stone, and the texture and the color of the composite artificial granite can be flexibly designed by adjusting the proportion and the types of mineral powder, so that the composite artificial gr