Polyolefin ester / slag-based green artificial agglomerated stone

Abstract

The invention discloses a polyolefin ester / slag-based green artificial agglomerated stone which is prepared by taking heavy calcium carbonate as an aggregate, factory slag as an inorganic adhesive and ethylene-ethyl acrylate as an organic adhesive through the steps of mixing, stirring, pressing, demolding and curing to obtain the high-performance green artificial agglomerated stone. The method has the advantages that the production cost is low, drying is fast, energy is saved, environment friendliness is achieved, the adhesive does not contain traditional aromatic hydrocarbon styrene, benzaldehyde, ethylbenzene and oxidized styrene volatile organic compounds (VOCs) solvents, and the prepared artificial agglomerated stone has the advantage of being environmentally friendly compared with unsaturated polyester artificial agglomerated stone. And the high-strength and high-water-absorptivity building material has the characteristics of high strength (greater than or equal to 124 MPa), low water absorptivity (less than or equal to 0.1%) and rapid curing, and is suitable for building structural members and decorative stones.

Description

Technical Field

[0001] This invention relates to the field of artificial stone technology, specifically to a polyolefin ester / slag-based green artificial stone. Background Technology

[0002] With the continuous growth of global demand for building and decoration materials, natural stone (such as marble and granite) has long held an important position in the field of building decoration. However, as a non-renewable resource, the large-scale mining and utilization of natural stone has gradually exposed many problems. On the one hand, over-exploitation has led to the gradual depletion of resources, while also causing serious problems such as soil erosion, ecological damage, and environmental pollution. On the other hand, the mining, processing, and transportation of natural stone are energy-intensive and costly, and the processing also generates a large amount of waste debris and dust, putting dual pressure on the environment and resources. Therefore, developing alternative materials to natural stone has become an important issue that the building and decoration industry urgently needs to address.

[0003] Driven by the pursuit of green, environmentally friendly, and sustainable development, engineered stone has gradually become an important alternative to natural stone due to its superior performance and strong design flexibility. Engineered stone is typically produced using solid waste such as natural stone fragments and stone powder as aggregates, adding binders, and undergoing processes such as molding, curing, and polishing. This type of material not only effectively utilizes construction waste and reduces costs, but also allows for rich color and texture designs through controlled raw material ratios, thus finding wide application in interior decoration, countertops, and flooring.

[0004] Currently, artificial quartz stone is mainly divided into three categories: resin-based, inorganic, and composite. Resin-based artificial quartz stone uses unsaturated polyester resin (UPR) and acrylic resin as binders, and is produced by molding stone powder and crushed materials under vacuum and high pressure. This type of artificial quartz stone has low water absorption, high flexural strength, and good overall density, avoiding the defects of natural stone caused by its high porosity and brittleness. However, resin-based artificial quartz stone has significant drawbacks: firstly, its surface hardness and wear resistance are poor, easily resulting in scratches and polishing marks during use; secondly, it continuously releases volatile organic compounds (VOCs) such as styrene and benzaldehyde during production, curing, and use, polluting the environment and posing a threat to human health; and thirdly, resin materials such as UPR are non-degradable, and even after long-term burial with aggregates, they are difficult to decompose naturally, creating a burden of difficult-to-manage solid waste. These problems seriously restrict the green development of resin-based artificial quartz stone.

[0005] Inorganic artificial quartz stone uses natural quartz stone fragments as its main raw material and is manufactured through processes such as mixing, molding, and curing using cement-based binders (such as silicate cement, aluminate cement, or magnesium oxychloride cement). Its production cost is lower, the process is simpler, and it possesses better weather resistance and chemical stability, making it particularly suitable for outdoor applications. Furthermore, inorganic binders are widely available, aligning with green and sustainable development requirements. However, this type of material has lower strength (compressive strength is generally between 40–60 MPa), significantly lower than resin-based artificial quartz stone (approximately 80–100 MPa). Due to the brittleness of artificial quartz stone, it is prone to cracking under high temperature and high pressure conditions; it also has poor impact resistance, making it easily damaged during use; its surface hardness is insufficient, making it susceptible to scratches and wear; and in terms of decorative appeal, color and texture control is difficult, and its high density makes splicing and processing inconvenient. These drawbacks limit the application of inorganic artificial quartz stone in high-end decorative applications.

[0006] Composite engineered stone combines the advantages of organic resins and inorganic binders, typically exhibiting higher mechanical strength and durability. The compressive and flexural strengths of composite engineered stone are significantly higher than those of natural stone, and its texture and color can be flexibly designed by adjusting the proportion and type of mineral powder, achieving both aesthetics and functionality. However, the manufacturing process for this type of material is relatively complex, and it still has shortcomings in terms of green environmental performance and cost control.

[0007] Against the backdrop of accelerated industrialization, industries such as metallurgy, energy, and mining generate a large amount of industrial by-products, among which slag is a significant solid waste. Slag is rich in silicon, calcium, aluminum, and other components, possessing potential cementitious activity and can be widely used in building materials as a cement substitute or mineral admixture. If industrial solid wastes such as slag can be efficiently utilized in the preparation of artificial engineered stone, it can not only solve the environmental pollution problems caused by solid waste storage but also effectively improve resource utilization efficiency, reduce production costs, and promote the development of a low-carbon society and a circular economy. Therefore, slag-based green artificial engineered stone has significant application value in both materials science and environmental engineering.

[0008] Existing resin-based artificial quartz stone suffers from problems such as the release of toxic substances, poor biodegradability, and inadequate environmental performance. Inorganic artificial quartz stone, while possessing advantages in environmental friendliness and weather resistance, suffers from insufficient strength and decorative properties. Composite artificial quartz stone, while combining performance and aesthetics, has complex manufacturing processes and limited green performance. Therefore, there is an urgent need to develop a green and environmentally friendly artificial quartz stone material that uses industrial solid waste (such as slag) as the main raw material and possesses characteristics such as dense structure, low porosity, excellent mechanical properties, and low VOC emissions. This type of material will not only contribute to the green transformation and upgrading of the artificial quartz stone industry but also play a significant role in promoting resource recycling and sustainable development strategies. Summary of the Invention

[0009] To address the aforementioned technical problems, this invention provides a polyolefin ester / slag-based green artificial quartz stone, aiming to obtain an artificial quartz stone with high compressive strength (≥124 MPa), low water absorption (≤0.1%), high temperature resistance, and excellent wear resistance, while releasing no VOCs and being green and environmentally friendly.

[0010] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0011] A polyolefin ester / slag-based green artificial quartz stone is prepared by mixing, stirring, pressing, demolding and curing, using heavy calcium carbonate as aggregate, industrial slag as inorganic binder and ethylene-ethyl acrylate (EEA), i.e. polyolefin ester, as organic binder, to obtain high-performance green artificial quartz stone.

[0012] As described above, the polyolefin ester / slag-based green artificial stone contains the following components by weight:

[0013] Heavy calcium carbonate 50-70 copies slag 30-50 servings Alkali activator 5-20 servings Ethylene-ethyl acrylate (EEA) 1-5 servings solvent 5-10 servings Methyltrimethoxysilane 0.5-1 serving fiber 2-7 portions

[0014] Preferably, the alkaline activator is liquid sodium silicate with a modulus of 1.4-1.8.

[0015] Preferably, the solvent is one of methanol, ethanol, petroleum ether or dimethyl ether; the fiber is carbon fiber with a diameter of 0.1 mm and a length of 10 mm.

[0016] Preferably, the heavy carbonic acid is obtained by crushing and sieving, selecting particles with a size range of 20-160 mesh, and drying at 100°C until the moisture content is less than 1%; the slag is obtained by crushing and sieving, selecting particles with a size not greater than 1200 mesh, and drying at 100°C until the moisture content is less than 1%.

[0017] Preferably, the heavy carbonic acid is 60-70 parts, the slag is 30-40 parts, the ethylene-ethyl acrylate (EEA) is 2-4 parts, the alkali activator is 15-20 parts, and the modulus is 1.5-1.6.

[0018] The preparation method of polyolefin ester / slag-based green artificial stone as described above includes the following steps:

[0019] (1) Weigh each component according to the following weight ratio: 50-70 parts of heavy calcium carbonate, 30-50 parts of slag, 5-20 parts of alkali activator, 1-5 parts of ethylene-ethyl acrylate (EEA), 5-10 parts of solvent, 0.5-1 parts of methyltrimethoxysilane, and 2-7 parts of fiber.

[0020] (2) Weigh the heavy calcium carbonate, slag and fiber obtained in step (1) and add them to the mixer. Mix the slurry evenly at a stirring speed of 150-300 r / min. Add the ethylene-ethyl acrylate obtained in step (1) to the evenly mixed slurry and continue stirring for 15 min to make the ethylene-ethyl acrylate and slurry evenly mixed to obtain the mixed slurry.

[0021] (3) Add the alkaline activator obtained in step (1) to the mixed slurry obtained in step (2), mix evenly at a stirring speed of 150-300 r / min, add the solvent obtained in step (1), and then add the methyltrimethoxysilane obtained in step (1), stir at a stirring speed of 150-300 r / min for 5 min, add the stirred slurry to the mold, and vibrate and press it into shape under vacuum conditions. After curing the molded artificial quartz stone, demold it. After demolding, continue to cure it in an environment with a temperature of 40-80 ℃ and a humidity of ≥90%. Grind and polish the artificial quartz stone to obtain polyolefin ester / slag-based green artificial quartz stone.

[0022] Preferably, in step (3), the molded artificial stone is cured in an environment of 25°C for 24 hours before demolding. Preferably, the vacuum condition in step (3) is a vacuum degree of -0.090MPa; after demolding in step (3), it is further cured in an environment of 50°C and ≥90% humidity.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] (1) This invention uses heavy calcium carbonate as aggregate, slag as inorganic gel material, and ethylene-ethyl acrylate (EEA) as high molecular organic binder for compounding. The solidification of slag originates from the dissolution of aluminosilicate components in an alkaline environment and subsequent polycondensation reaction. Finally, aluminum oxide and silicon oxide bond to form a stable three-dimensional network structure, which significantly improves the durability and mechanical properties of the material. This process does not depend on the formation of calcium hydration products and has better chemical stability and heat resistance. EEA is bonded to the inorganic material through hydrogen bonds. This structure improves the density of the inorganic gel material and can improve the mechanical properties of artificial granite to a certain extent. Therefore, the artificial granite of this invention has high mechanical strength, excellent high temperature stability and good chemical corrosion resistance.

[0025] (2) This method has advantages such as low production cost, fast drying, energy saving and environmental protection, and the use of adhesives that do not contain traditional aromatic hydrocarbons such as styrene, benzaldehyde, ethylbenzene and styrene oxide volatile organic compounds (VOCs) solvents. The artificial stone prepared has the advantage of being green and environmentally friendly compared with unsaturated polyester artificial stone. Furthermore, it does not use cement and does not introduce water-reducing agents, early-strength agents and expansion agents, and uses solid waste such as slag as inorganic gel material, which has a significant advantage in reducing carbon dioxide emissions. The artificial stone prepared has the characteristics of high strength (≥124 MPa), low water absorption (≤0.1%) and rapid curing, and is suitable for building structural components and decorative stone. Attached Figure Description

[0026] Figure 1 Example 1 shows the headspace gas chromatogram of the volatile components of the prepared polyolefin ester / slag-based green artificial stone.

[0027] Figure 2 The headspace gas chromatogram of the volatile components of the unsaturated polyester resin-based artificial stone obtained in Comparative Example 4 is shown. Detailed Implementation

[0028] The following detailed description, in conjunction with the accompanying drawings, outlines specific embodiments. However, it should be understood that the scope of protection of this invention is not limited to these specific embodiments. Unless otherwise specified, all raw materials and reagents used in the examples are commercially available.

[0029] The ethylene-ethyl acrylate (EEA) used in the examples was sourced from Guangxi Wanwei Biomass Technology Co., Ltd. The slag was purchased from Yantai Anda Environmental Protection Technology Co., Ltd. The liquid sodium silicate used was purchased from Jiashan Yourui Refractory Materials Co., Ltd., with a modulus of 3.3, 26.98% silicon dioxide (SiO2), 8.53% sodium oxide (Na2O), and a Baume degree of 38.5 Be.

[0030] Methods for adjusting the modulus of alkali activator:

[0031] Na2O⋅SiO2 + 2NaOH ⇄Na2O⋅SiO2 + Na2O + H2O;

[0032] Where Na2O⋅SiO2 is 80 and Na2O is 1, then the calculation is performed based on Na2O⋅SiO2 being n and Na2O being x;

[0033]

[0034] The modulus Ms is adjusted by controlling the amount of NaOH, and calculated using equation (1). and , where are the mass fractions of SiO2 and Na2O in sodium silicate, respectively; x is the number of moles of Na2O added to the original sodium silicate solution (mol); n is the amount of NaOH added (g); and 60 and 62 are the relative molecular masses of SiO2 and Na2O, respectively.

[0035] The fiber used in the example is a polyacrylonitrile-based carbon fiber with a diameter of 0.1 mm and a length of 10 mm.

[0036] The heavy carbonate used in the examples was obtained by crushing and sieving, selecting a particle size range of 20-160 mesh, and drying it at 100℃ until the moisture content was less than 1%; the slag was obtained by crushing and sieving, selecting a particle size of no more than 1200 mesh, and drying it at 100℃ until the moisture content was less than 1%.

[0037] Example 1

[0038] A method for preparing polyolefin ester / slag-based green artificial stone, the operation steps are as follows:

[0039] (1) Weigh each component in g: 700g of heavy calcium carbonate, 300g of slag, 200g of liquid sodium silicate with a modulus of 1.6, 20g of EEA, 100g of ethanol (75% vol), 5g of methyltrimethoxysilane, and 50g of fiber;

[0040] (2) Weigh the heavy calcium carbonate, slag and fiber obtained in step (1) and add them to the mixer. Mix the slurry evenly at a stirring speed of 300 r / min. Add the EEA obtained in step (1) to the evenly mixed slurry and continue stirring for 15 min to make the EEA and slurry evenly mixed to obtain the mixed slurry.

[0041] (3) Add the liquid sodium silicate obtained in step (1) to the mixed slurry obtained in step (2), mix evenly at a stirring speed of 150 r / min, add 5 parts of ethanol (75% vol) obtained in step (1), and then add the methyltrimethoxysilane obtained in step (1). Stir at a stirring speed of 150 r / min for 5 min. Add the stirred slurry to the mold, and vibrate and press it into shape under vacuum conditions of -0.090 MPa. Place the molded artificial quartz stone in an environment of 25℃ for 24 h and then demold it. After demolding, continue to cure it in an environment of 50℃ and ≥90% humidity. Grind and polish the artificial quartz stone to obtain polyolefin ester / slag-based green artificial quartz stone. After curing the obtained polyolefin ester / slag-based green artificial stone for one day, the polyolefin ester / slag-based green artificial stone was pulverized, and 1.0 g was weighed and placed into a 20 mL headspace vial. The volatile gas components of the polyolefin ester / slag-based green artificial stone were determined using headspace-gas chromatography-mass spectrometry (HS-GC-MS). Figure 1As shown in Table 1.

[0042] Table 1. Major VOCs and Hazard Classification of Polyolefin Ester / Slag-Based Green Artificial Stone in Example 1

[0043] serial number substance Retention time (min) CAS IARC / Carcinogenic Classification 1 methanol 2.51 67-56-1 Uncategorized

[0044] Example 2

[0045] A method for preparing polyolefin ester / slag-based green artificial stone, the operation steps are as follows:

[0046] (1) Weigh each component in g: 700g of heavy calcium carbonate, 300g of slag, 200g of liquid sodium silicate with a modulus of 1.6, 15g of EEA, 50g of ethanol (75% vol), 5g of methyltrimethoxysilane, and 50g of fiber.

[0047] (2) Weigh the heavy calcium carbonate, slag and fiber obtained in step (1) and add them to the mixer. Mix the slurry evenly at a stirring speed of 300 r / min. Add the EEA obtained in step (1) to the evenly mixed slurry and continue stirring for 15 min to make the EEA and slurry evenly mixed to obtain the mixed slurry.

[0048] (3) Add the liquid sodium silicate obtained in step (1) to the mixed slurry obtained in step (2), mix evenly at a stirring speed of 150 r / min, add the ethanol (75% vol) obtained in step (1), and then add the methyltrimethoxysilane obtained in step (1). Stir at a stirring speed of 150 r / min for 5 min, add the stirred slurry to the mold, and vibrate and press it into shape under vacuum conditions of vacuum degree -0.090Mpa. After the molded artificial stone is placed in an environment of 25℃ for 24h, it is demolded. After demolding, it is further cured in an environment of 50℃ and humidity ≥90%. The artificial stone is then ground and polished to obtain polyolefin ester / slag-based green artificial stone.

[0049] Example 3

[0050] A method for preparing polyolefin ester / slag-based green artificial stone, the operation steps are as follows:

[0051] (1) Weigh each component in g: 600 g of heavy calcium carbonate, 400 g of slag, 150 g of liquid sodium silicate with a modulus of 1.5, 40 g of EEA, 50 g of ethanol, 5 g of methyltrimethoxysilane, and 50 g of fiber.

[0052] The remaining operations are the same as in Example 1; a polyolefin ester / slag-based green artificial granite is obtained.

[0053] Example 4

[0054] A method for preparing polyolefin ester / slag-based green artificial stone, the operation steps are as follows:

[0055] (1) Petroleum ether was used as the solvent and the rest of the operation was the same as in Example 1; polyolefin ester / slag-based green artificial stone was obtained.

[0056] Example 5

[0057] A method for preparing polyolefin ester / slag-based green artificial stone, the operation steps are as follows:

[0058] (1) Weigh each component in g: 600 g of heavy calcium carbonate, 300 g of slag, 200 g of liquid sodium silicate with a modulus of 1.6, 30 g of EEA, 50 g of ethanol, 5 g of methyltrimethoxysilane, and 50 g of fiber; the rest of the operation is the same as in Example 1, and polyolefin ester / slag-based green artificial stone is obtained.

[0059] Comparative Example 1

[0060] A method for preparing artificial quartz stone, the specific implementation method is the same as in Example 1, except that the amount of heavy calcium carbonate is 40 parts and the amount of slag is 60 parts.

[0061] Comparative Example 2

[0062] A method for preparing artificial quartz stone, the specific method is the same as in Example 1, the difference being that in step (1) of Example 1, EEA is not weighed, and in step (3), EEA is not added.

[0063] Comparative Example 3

[0064] A method for preparing artificial quartz stone is the same as in Example 1, except that cement is used instead of slag, i.e., cement is used as an inorganic gelling material; and the alkali activator liquid sodium silicate is replaced with an equal amount of deionized water.

[0065] Comparative Example 4

[0066] A method for preparing unsaturated polyester resin-based artificial stone, the specific steps of which are as follows:

[0067] (1) Heavy calcium carbonate is pulverized and sieved, and the particle size range is selected from 20-160 mesh. It is dried at 100℃ until the moisture content is less than 1% and then set aside. Weigh each component according to the mass ratio: the above-mentioned heavy calcium carbonate: unsaturated polyester resin (binder for resin-type artificial stone): white stone powder (80 mesh): titanium dioxide pigment = 25:50:5:3.

[0068] (2) Weigh the heavy calcium carbonate, unsaturated polyester resin, white stone powder (80 mesh) and titanium dioxide pigment obtained in step (1) and add them to a mixer. Mix the slurry evenly at a stirring speed of 150 r / min. Add 1.5% methyl ethyl ketone peroxide (based on the weight of the added unsaturated polyester resin) and stir for 15 min. Add the stirred slurry to a mold and vibrate and press it into shape under vacuum conditions (vacuum degree -0.090MPa). Place the molded artificial stone in an environment of 25℃ for 24 h and then demold it. Then, cure it in an environment of 50℃ and ≥90% humidity. After curing, grind and polish the artificial stone to obtain unsaturated polyester resin-based artificial stone. After curing the obtained unsaturated polyester-based artificial granite for one day, 1.0 g of the pulverized unsaturated polyester-based artificial granite was weighed and placed in a 20 mL headspace vial. The volatile gas components of the pulverized unsaturated polyester-based artificial granite were determined using headspace-gas chromatography-mass spectrometry (HCGC-MS). The results are as follows: Figure 2 As shown in Table 2.

[0069] Table 2. Classification of Main VOCs Volatile Components and Hazards in Comparative Example 4 Resin Artificial Stone

[0070] serial number substance Retention time (min) CAS IARC Carcinogenic Classification 1 dichloromethane 2.891 141-78-6 Carcinogenic 2 Methyl acetate 3.309 79-20-9 Uncategorized 3 Ethyl acetate 4.089 100-41-4 Uncategorized 4 Ethylbenzene 9.343 100 -42-5 Potentially carcinogenic 5 styrene 10.237 100-52-7 Carcinogenic 6 benzaldehyde 12.181 75-09-2 Potentially carcinogenic 7 Styrene oxide 14.669 96-09-3 Carcinogenic

[0071] By using headspace gas chromatography-mass spectrometry (HS-GC-MS), a standard curve was plotted by configuring the response values ​​of standard concentrations of VOCs in headspace gas chromatography. Then, 1.0 g of polyolefin ester / slag-based green artificial stone and unsaturated polyester-based artificial stone, which had been cured for 1 day, were respectively placed into 20 mL headspace vials and analyzed using headspace gas chromatography. The VOCs content of polyolefin ester / slag-based artificial stone and unsaturated polyester-based artificial stone was calculated by substituting the response values ​​into the standard curve. The results are shown in Table 3.

[0072] Table 3. Comparison of the main volatile components and contents of VOCs in artificial stone after 1 day of curing in Example 1 and Comparative Example 4.

[0073] methanol dichloromethane Methyl acetate Ethyl acetate Ethylbenzene styrene benzaldehyde Styrene oxide Example 1 (μg / g) 45 0 0 0 0 0 0 0 Comparative Example 4 (μg / g) 0 34 214 273 43 935 75 205

[0074] After 28 days of curing, the artificial quartz stone of Examples 1-4 and Comparative Examples 1-4 was subjected to performance tests in accordance with the standard "Test Methods for All Stone Materials". The test results are shown in Table 4.

[0075] Table 4

[0076] Experiment number Compressive strength, MPa Flexural strength MPa Water absorption rate % abrasion resistance (mm) Impact resistance kJ / m2 Surface heat resistance temperature (°C) Example 1 144 22.1 0.09 84 4.12 530 Example 2 142 21.5 0.04 73 4.08 520 Example 3 132 20.4 0.10 76 4.03 500 Example 4 124 20.2 0.08 75 4.02 480 Example 5 139 21.8 0.06 76 4.06 510 Comparative Example 1 118 14.5 0.32 72 3.20 420 Comparative Example 2 102 13.3 0.15 70 3.15 300 Comparative Example 3 80 14.5 0.64 68 3.08 280 Comparative Example 4 113 15.4 0.18 71 3.07 320

[0077] As shown in Table 4, the polyolefin ester artificial granite prepared by this invention has a compressive strength of 144 MPa, a flexural strength of 22.1 MPa, a water absorption rate of less than 0.09%, an abrasion resistance greater than 88 mm, and an impact resistance of 4.12 kJ / m. 2 The surface heat resistance temperature can reach 530 ℃. The artificial stone prepared not only has high mechanical properties, but is also green and environmentally friendly, meeting the needs of use.

[0078] The reason for the low performance of Comparative Example 1 is that the raw material ratio has a significant impact on product performance. The high proportion of slag as an inorganic binder increases brittleness and reduces toughness, leading to a decline in mechanical properties. Comparative Example 2, without the addition of EAA emulsion, exhibits weakened bonding ability, making the resulting artificial stone prone to pore formation and affecting mechanical properties. By comparing the mechanical properties with Comparative Example 3 (cement-based artificial stone) and Comparative Example 4 (unsaturated polyester-based artificial stone), the artificial stone prepared by this invention outperforms the other two types in all aspects.

[0079] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A polyolefin ester / slag-based green artificial granite, characterized in that: High-performance, green artificial quartz stone is prepared by mixing, stirring, pressing, demolding, and curing using heavy calcium carbonate as aggregate, factory slag as inorganic binder, and ethylene-ethyl acrylate as organic binder.

2. The polyolefin ester / slag-based green artificial stone as described in claim 1, characterized in that, It contains the following components by weight:

3. The polyolefin ester / slag-based green artificial stone according to claim 2, characterized in that: The alkaline activator is liquid sodium silicate with a modulus of 1.4-1.

8.

4. The polyolefin ester / slag-based green artificial stone according to claim 2, characterized in that: The solvent is one of methanol, ethanol, petroleum ether or dimethyl ether; the fiber is carbon fiber with a diameter of 0.1 mm and a length of 10 mm.

5. The polyolefin ester / slag-based green artificial stone according to claim 2, characterized in that: The heavy carbonate is obtained by crushing and sieving, selecting particles with a size range of 20-160 mesh, and drying at 100℃ until the moisture content is less than 1%; the slag is obtained by crushing and sieving, selecting particles with a size not greater than 1200 mesh, and drying at 100℃ until the moisture content is less than 1%.

6. The polyolefin ester / slag-based green artificial stone according to claim 2, characterized in that: The heavy carbonic acid comprises 60-70 parts, the slag comprises 30-40 parts, the ethylene-ethyl acrylate comprises 2-4 parts, the alkali activator comprises 15-20 parts, and the modulus comprises 1.5-1.

6.

7. The method for preparing polyolefin ester / slag-based green artificial stone according to any one of claims 1-6, characterized in that, The operation includes the following steps: (1) Weigh each component according to the following weight ratio: 50-70 parts of heavy calcium carbonate, 30-50 parts of slag, 5-20 parts of alkali activator, 1-5 parts of ethylene-ethyl acrylate, 5-10 parts of solvent, 0.5-1 parts of methyltrimethoxysilane, and 2-7 parts of fiber. (2) Weigh the heavy calcium carbonate, slag and fiber obtained in step (1) and mix them evenly with a stirring speed of 150-300 r / min. Add the ethylene-ethyl acrylate obtained in step (1) to the evenly mixed slurry and continue stirring to mix the ethylene-ethyl acrylate with the slurry evenly to obtain a mixed slurry. (3) Add the alkaline activator obtained in step (1) to the mixed slurry obtained in step (2), mix evenly at a stirring speed of 150-300 r / min, add the solvent obtained in step (1), and then add the methyltrimethoxysilane obtained in step (1), stir at a stirring speed of 150-300 r / min, add the stirred slurry to the mold, and vibrate and press it into shape under vacuum conditions. After curing the molded artificial quartz stone, demold it. After demolding, continue to cure it in an environment with a temperature of 40-80 ℃ and a humidity of ≥90% to obtain polyolefin ester / slag-based green artificial quartz stone.

8. The method for preparing polyolefin ester / slag-based green artificial stone according to claim 7, characterized in that: In step (3), the molded artificial stone is placed in an environment of 25°C for 24 hours for curing before demolding.

9. The method for preparing polyolefin ester / slag-based green artificial stone according to claim 7, characterized in that: The vacuum condition mentioned in step (3) is a vacuum degree of -0.090MPa; after demolding in step (3), the material is cured in an environment with a temperature of 50℃ and a humidity of ≥90%.

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