CN111284090A

CN111284090A - Improved epoxy resin composite artificial stone plate manufacturing process

Info

Publication number: CN111284090A
Application number: CN202010121408.XA
Authority: CN
Inventors: 雷俊挺; 韦振华
Original assignee: 雷俊挺
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2020-06-16

Abstract

The invention discloses an improved process for manufacturing an epoxy resin composite artificial stone plate, which is characterized by comprising the following steps of: the low-cost cement-based plate is used as the base material of the composite plate, and the high-performance epoxy resin concrete is used as the surface material of the composite plate. The specific method comprises the following steps: the double water-blocking interlayer and the interface adhesive layer are coated on the bottom plate of the cement-based plate. Then, the epoxy resin mortar is distributed into a cement base plate mould coated with the double-layer water-blocking interlayer and the interface adhesive layer, and then the mould is sent to a vibration table arranged in a vacuum box. The mould with the epoxy resin mortar vibrates in vacuum, when air wrapped in the mortar is pumped out, the vibration promotes the epoxy resin concrete mortar to be dense, so that the epoxy resin concrete mortar can be directly compounded with the cement-based floor, the composite artificial stone slab with the surface layer of epoxy resin concrete with excellent performance, the bottom layer of cement-based floor with low cost and the surface layer of good water-blocking interlayer is obtained after curing.

Description

Improved epoxy resin composite artificial stone plate manufacturing process

Technical Field

The invention relates to an improved process for manufacturing an epoxy resin composite artificial stone plate.

Technical Field

With the enhancement of ecological environment protection, the extraction of natural resources without restriction for building materials is strictly controlled, and the artificial stone as a green building material can supplement the shortage of stone plates caused by mining restrictions, so the artificial stone has been rapidly developed in the past decade.

Unsaturated polyester resins are widely used as binders for artificial stone because of their low cost and ease of use. The artificial stone produced by using the unsaturated polyester resin as the adhesive can be used for decorating the table top plate and the wall surface. However, when the unsaturated polyester resin, especially the o-benzene unsaturated polyester resin artificial stone is used for ground installation, because the chemical resistance of the polyester resin is poor, when the artificial stone is eroded by high-alkalinity water vapor permeating through concrete for a long time, the polyester is hydrolyzed and degraded, so that the problems of plate surface warping, hollowing, cracking and the like of the artificial stone ground are caused. In addition, 15-30% of volatile active diluent styrene in the unsaturated polyester resin volatilizes in the production process, particularly in the stirring and distributing processes, so that the working environment and the natural environment are seriously polluted, the body health of construction workers is influenced, and the volatile active diluent styrene becomes a main factor for polluting the environment by the unsaturated polyester resin artificial stone at present.

The inorganic artificial stone produced by using the silicate cement or the aluminate cement as the adhesive has good dimensional stability and strong alkali resistance, and solves the problems of plate surface warping, hollowing, cracking and the like when being used for ground installation. However, the inorganic artificial stone has poor anti-fouling and acid-resistant capabilities due to its high raw material characteristics and inherent water absorption. The inorganic artificial stone without fiber reinforcement has lower breaking strength, so the inorganic artificial stone is used for ground installation, and particularly, the table top with high anti-pollution requirements and the ground installation are also limited.

The epoxy resin artificial stone not only has good mechanical property, physical property and excellent chemical stability, but also basically has no volatile gas escape in the production process because the epoxy resin contains extremely low Volatile Organic Compounds (VOCs). In the united states, when the building floor of airport terminal building is renovated, the epoxy artificial stone is compared with other ground materials for evaluation, and finally, the conclusion is drawn: although the initial installation cost of the epoxy artificial stone ground is higher than that of other ground materials, the life cycle cost of the epoxy artificial stone is the lowest as a result of long service life, low maintenance cost, environmental protection and diversified design. At present, the hard ground material of the building of the airport terminal in the United states is widely made of the artificial epoxy resin stone, and the newly built government buildings also begin to commonly use the artificial epoxy resin stone ground.

At present, the epoxy resin artificial stone ground is mainly cast and polished on site, so the epoxy resin artificial stone ground is also called as epoxy resin terrazzo. The requirements of on-site pouring and polishing on a cement concrete base layer are high, and the base layer is quite flat and firm, and has high requirements on cracking resistance, water resistance and other pretreatment of the base layer. The initial cost of casting epoxy terrazzo in place is high, with initial installation at $ 350-. In China, the project quotation for individually receiving the cast epoxy resin terrazzo on site is also 1500-. Even at such high initial construction costs, the site pouring still has huge quality hidden dangers, mainly the surface pretreatment of the cement concrete substrate can not meet the requirements.

A new process is found to reduce the initial installation cost of the epoxy resin terrazzo, the factory modularization production replaces the field pouring to reduce the requirement on a cement concrete base layer, and the reduction of the production cost and the installation cost can effectively ensure that the high-performance material of the epoxy resin artificial stone/terrazzo is widely applied.

The present invention provides a method for preparing a composite artificial stone with excellent performance in the patent application with the patent application number of CN 108424067A. In this patent application, the inventor proposes to use a silicate cement inorganic binder mixed with various stone processing waste, construction waste or mine waste as a base material of a composite board, and use organic polymer resin concrete including epoxy resin concrete as a face material, and press-molding and curing the mixture to obtain an organic-inorganic composite artificial stone having excellent surface finish properties. The applied patent reduces the manufacturing cost of the epoxy resin artificial stone with excellent performance and solves the problem of recycling waste materials. Another important characteristic of this patent is that because the bottom layer of the composite board is cement-based material, it is compatible with common cement-based mounting material well, thus simplifying the mounting process and further reducing the use cost of the epoxy resin artificial stone with excellent performance.

The application number is CN108424067A patent application has solved the problem that epoxy resin rostone is with high costs through the method of material recombination, through making full use of various stone material processing waste, building waste or mine waste as the filler with cement-based material as the bottom of composite board, not only reduced the cost, changed waste into valuables, still simplified the mounting process, further reduced the cost.

Based on further research and repeated experiments, the applicant of the present invention found that the largest defect of the patent application No. CN108424067A is that, because there is no water-blocking barrier between the bottom layer and the surface layer, when the concrete base layer is installed on the ground, the bottom layer cannot effectively prevent the water vapor from escaping from the concrete base layer. When the water vapor escape rate of the cement concrete base layer exceeds the range which can be borne by the epoxy resin concrete layer for a long time, the composite interface is cracked and separated, and serious quality problems are caused. In addition, the composite material described in the patent application No. CN108424067A has the following disadvantages. First, since the bottom layer and the top layer are both semi-dry wet materials, the bottom layer needs to be pre-pressed into a plane which can be painted with an interface agent, and then the top layer is laid. The secondary pressing of the secondary cloth consumes longer time, and the difficulty in controlling the cloth thickness of the semi-dry wet material to be uniform is higher; secondly, because the bottom layer is aqueous aggregate and the surface layer is resin aggregate, the selection of the interface agent for effectively bonding the bottom layer and the surface layer is limited; thirdly, because the materials of the bottom layer and the surface layer are different, the curing modes and conditions have large difference, and simultaneously, the selectable compromise conditions for satisfying the curing conditions of the bottom layer and the surface layer are not too many; fourthly, since the bottom layer and the surface layer are made of different materials but need to be cured simultaneously, different shrinkage rates generated when the different materials are cured must be considered, and thus, the deformation of the board, the reduction of the adhesive force between the surface layer and the bottom layer, and the like caused by stress are generated.

This patent proposes a solution to the above problems, and in particular to the problem of the effect of the water vapor escape rate of the cement concrete base layer on the bonding of the composite interface layer. The process provided by the patent can ensure quality, simplify procedures, reduce cost, and is simple and easy to install and capable of recycling waste materials. The invention can reduce the initial installation cost of the epoxy resin terrazzo on the ground to 35-40% of the installation cost of on-site pouring.

Disclosure of Invention

The improved process for manufacturing the epoxy resin composite artificial stone slab at least comprises a composite board bottom water-blocking interlayer, an interface adhesive layer and an epoxy resin mortar concrete surface layer.

Bottom layer of the composite board: the composite bottom plate can be made of cement-based concrete thin plates, low-price and easily-obtained natural stone plates and ceramic plates. Preferably, the composite bottom plate is made of artificial inorganic stone plates made of Portland cement and aluminate cement, which have stable physical properties, are convenient for ground installation and have low price. The composition of the aggregate/filler can be selected from quartz sand/powder, calcium carbonate sand/powder, various stone processing waste materials or construction waste materials or other inorganic minerals besides the silicate cement and aluminate cement inorganic binder.

The cement-based concrete sheet bottom plate can be produced by a direct casting method, a common static pressure method and a vacuum vibration pressing method.

Water blocking interlayer: the water-blocking interlayer consists of an aqueous water-blocking interlayer and a resin carrier water-blocking interlayer. The water-based water-blocking interlayer comprises a liquid component of the water-based water-blocking interlayer, wherein the liquid component comprises a mixed emulsion of one or more polymers of polyacrylic acid (ester) resin (Acrylic), polypropylene (Styrene Acrylic) resin (polyvinyl acetate resin (PVA), polyvinyl acetate-ethylene copolymer resin (VAE) and polystyrene-butadiene copolymer resin (SBR) water-based emulsion, and an auxiliary film agent, a wetting agent, an antifoaming agent, an early strength agent and a retarder. The powder component of the water-based water-blocking interlayer is composed of inorganic fillers such as portland cement, quartz sand/powder, light/heavy calcium carbonate sand/powder and the like.

The resin carrier water-blocking interlayer consists of a resin carrier, flaky fillers, nano silicon dioxide and other inorganic mineral powder fillers. The carrier resin comprises epoxy resin, polyester resin, vinyl ester resin, phenolic resin, cyanate resin, polyurethane resin and various auxiliaries. The carrier resin is preferably an epoxy resin. The flaky filler comprises one or more of mica sheet, ceramic sheet, glass flake, plastic sheet and other flaky mineral raw materials. The nano silicon dioxide comprises gas phase silicon dioxide, precipitation method silicon dioxide and micro silicon powder. Other inorganic mineral powders include titanium dioxide, talc, barite powder (barium sulfate powder), and wollastonite powder.

Interface glue layer: the interface adhesive layer is composed of epoxy resin, silane coupling agent, reactive diluent, non-reactive diluent, wetting agent, defoaming agent, curing agent and curing aid. The epoxy resin is preferably bisphenol a epoxy resin. The silane coupling agent is preferably 3- (2, 3-glycidoxy) propyltrimethoxysilane or N- (2-aminoethyl) -3-aminopropyltrimethoxysilane. The reactive diluent is preferably C12-C14AGE, and the non-reactive solvent is preferably benzyl alcohol and tetrahydrofurfuryl alcohol. The curing agent is preferably a mixture of a cycloalkylamine and a linear amine, such as 70 parts of Isophoronediamine (IPDA) and 30 parts of polyetheramine (JEFFAMINE).

Resin mortar concrete surface course: the resin mortar concrete surface layer is composed of epoxy resin, a coupling agent, a reactive diluent, a non-reactive diluent, a wetting agent, a pigment and a polyamine curing agent. The epoxy resin is preferably bisphenol a epoxy resin. Firstly, epoxy resin, a coupling agent, a reactive diluent, a non-reactive diluent, a wetting agent and a pigment are prepared into an adhesive liquid component A with the viscosity of 500-1000cps according to a certain proportion. And (3) fully and uniformly mixing the fine powder with the size of more than 300 meshes with the adhesive liquid component A, storing for at least 30 minutes, then adding the adhesive liquid polyamine B component, uniformly stirring, adding the mixture into sand material with the size of less than 100 meshes, and stirring to obtain the epoxy resin mortar with the slump of 40-50 mm.

The preparation procedure is as follows:

the composite bottom plate is prepared by adopting a direct pouring vibration method, a common static pressure method or a vacuum vibration pressing method. And then a layer of water-based water-blocking interlayer with the thickness of 0.2-2.0mm, preferably 0.6-1.0mm is coated on the surface of the bottom plate. When the composite board bottom board is prepared by adopting a direct pouring method or a common static pressure method, the water-based water-blocking interlayer can be applied after the base layer is formed and is cured synchronously with the base layer. When the composite board bottom plate is prepared by adopting a vacuum vibration pressing method, the water-based water-blocking interlayer needs to be applied after the bottom plate is solidified. After the water-based water-blocking interlayer is cured, a resin carrier water-blocking interlayer with the thickness of 0.2-2.0mm, preferably 0.5-1.0mm is coated on the water-based water-blocking interlayer. And coating a 0.2-1.0mm, preferably 0.4-0.6mm interface adhesive layer on the resin carrier water-blocking interlayer within 24 hours, preferably 2-5 hours after the resin carrier water-blocking interlayer is coated. And applying a resin mortar surface layer of 3-15mm, preferably 6-10mm within 24 hours, preferably 2-5 hours after the interface adhesive layer is coated. The composite aggregate formed by the composite board bottom layer, the water-blocking interlayer, the interface adhesive layer and the resin mortar layer is sent into a vacuum vibration box, and the vacuum vibration box can be provided with a heating device and maintains the temperature of the vacuum vibration box at 30-45 ℃. The whole mould aggregate is in a negative pressure state, and air in the mortar is pumped out. The surface layer of the resin mortar of the mold aggregate compound obtained after vacuum vibration is flat and dense and has no pores. And (5) after curing, grinding and polishing to obtain the board for the ground or wall decoration.

The water-blocking interlayer between the bottom layer and the surface layer of the composite artificial stone plate produced by the method can effectively reduce the water vapor escape rate of the concrete base when the composite plate is installed and used, thereby avoiding the cracking and separation problem of the composite interface caused by excessive water vapor escape. In addition, the bottom layer and the surface layer of the composite artificial stone plate produced by the method do not need pressing steps, the bottom layer is a mould plate and does not need demoulding, and the bottom layer is a plate which is completely cured and shaped, so that the combination of the resin mortar surface layer and the bottom layer is firmer. The characteristics of the invention ensure that the process for producing the composite artificial stone is simpler, the efficiency is higher, the cost is lower, the performance is better and the quality is more stable.

Detailed Description

The following claims are hereby incorporated into the detailed description of the present invention, without any limitation thereto, and any limited number of modifications based on the technical solutions of the present invention may still be included in the present invention.

The improved process for manufacturing the epoxy resin composite artificial stone plate at least comprises a composite plate bottom layer, a double water-blocking interlayer, an interface adhesive layer and a resin mortar concrete surface layer. An aqueous waterproof interlayer, a resin carrier waterproof interlayer and an interface adhesive layer are sequentially coated between the bottom layer and the surface layer of the composite board.

The water-based waterproof interlayer is composed of one or more than one polymer mixed polymer water-based emulsion of polyacrylic resin, polypropylene resin, polyvinyl acetate-ethylene copolymer resin and styrene-butadiene copolymer resin, a film-forming additive, a wetting agent, a defoaming agent, an early strength agent, a coagulant, silicate cement, quartz sand, light and heavy calcium carbonate and other inorganic fillers.

The resin carrier waterproof interlayer consists of a resin carrier, flaky fillers, nano silicon dioxide and other powder fillers. The flaky filler is one or a mixture of mica sheets, ceramic sheets, glass flakes, plastic sheets and other flaky mineral raw materials. The nano silicon dioxide is selected from gas-phase silicon dioxide, precipitated silicon dioxide or micro silicon powder. The carrier resin can be selected from epoxy resin, polyester resin, vinyl ester resin, phenolic resin, cyanate resin and polyurethane resin. The carrier resin is epoxy resin and polyamine as curing agent. The resin carrier waterproof interlayer contains a silane coupling agent.

The interface adhesive layer is composed of epoxy resin, silane coupling agent, reactive diluent, non-reactive diluent, wetting agent, defoaming agent, curing agent and curing aid. The epoxy resin is bisphenol A epoxy resin. The silane coupling agent is selected from 3- (2, 3-epoxypropoxy) propyl trimethoxy silane and N- (2-aminoethyl) -3-aminopropyl trimethoxy silane. The active diluent is preferably C12-C14AGE, and the inactive solvent is benzyl alcohol and tetrahydrofurfuryl alcohol. The curing agent is selected from mixed amine of naphthenic amine and fatty amine.

The resin mortar concrete surface layer is made of epoxy resin mortar concrete, and the bottom plate of the composite plate is made of a cement-based thin plate.

The resin mortar concrete surface layer is composed of epoxy resin, a coupling agent, a reactive diluent, an inactive diluent, a wetting agent, a polyamine curing agent and an aggregate/filler. Firstly, epoxy resin, a coupling agent, a reactive diluent, a non-reactive diluent and a wetting agent are mixed into an adhesive liquid component A with the viscosity of 500-1000cps according to a certain proportion. And then fully mixing the fine powder with the size of more than 300 meshes with the adhesive liquid component A uniformly, storing for at least 30 minutes, then adding the adhesive liquid polyamine B component, stirring uniformly, adding the mixture into sand material with the size of more than 100 meshes, and stirring to obtain the mortar with the slump of 40-50 mm.

The composite board bottom layer, the double water-blocking interlayer, the interface adhesive layer and the resin mortar concrete surface layer form a complete composite structure, and the composite integral structure is sent into a vacuum box to vibrate. The vacuum box is provided with a heating element to maintain the temperature in the vacuum box at 40-45 ℃ so as to assist vacuum to extract the low-boiling-point solvent from the resin mortar. The heating element is preferably an infrared heating tube.

The composite artificial stone is processed into a final product after being subjected to vacuum vibration, densification, curing and shaping.

First, preparation of composite board bottom layer

1. The direct casting method for preparing the composite bottom plate comprises the following components in percentage by mass:

the raw materials are evenly mixed and poured into a mould, the mould is placed on a vibration platform, and the mortar in the mould is vibrated, compacted and leveled. And coating a water-based water-blocking interlayer on the leveled mortar surface.

2. The composite bottom plate prepared by the common static pressure method comprises the following components in percentage by mass:

the raw materials are uniformly mixed and then are distributed into a mould, and the mortar in the mould is pressed and formed by using a 800-sand 2000-ton static pressure machine. Preferably the mould is in the shape of a shallow basin so that the extruded shape has a periphery which is 10-15mm above the basin bottom. And a water-blocking interlayer is coated on the surface of the pressed basin-shaped bottom plate.

3. The vacuum vibration pressing method is used for preparing the composite bottom plate and comprises the following components in percentage by mass:

stirring the raw materials into semi-dry aggregates in a vacuum state, distributing the semi-dry aggregates into a mold in the vacuum state, and pressing the aggregates by a mold pressing head in the vacuum state in a vibration mode. If the mould is plate-shaped, the plate obtained by pressing can be directly used as a composite plate bottom plate after demoulding and curing; if the mould is square material, the square material obtained by pressing is sawed into plates with certain thickness after demoulding and curing and is used for a composite plate bottom plate, and a water-soluble water-blocking interlayer is coated on the plate surface of the bottom plate.

Preparation of water-blocking interlayer

1. Aqueous water-blocking interlayer composition (mass%)

Liquid component

Powder component

The liquid component and the powder component are uniformly mixed according to the proportion of 1:1.5-2.5 and coated on the surface of the composite bottom plate.

2. Resin carrier water-blocking interlayer (mass%)

Component A

B component

55-65% of naphthenic polyamine curing agent

25-30% of aliphatic polyamine curing agent

4 to 10 percent of diluent

And uniformly mixing the component A and the component B according to the epoxy equivalent and the active hydrogen equivalent of 1:1, and coating the mixture on the cured water-based water-blocking interlayer.

Thirdly, the interface adhesive layer comprises the following components in percentage by mass:

and uniformly stirring all components of the interface adhesive layer and coating the interface adhesive layer on the water-blocking layer surface.

Four, resin mortar layer composition (mass%)

1. Adhesive component

2. Aggregate/filler component (% by mass)

After the adhesive is uniformly stirred, the premixed aggregate/filler is added into the stirred adhesive to be mixed and stirred until uniform mortar with certain fluidity is obtained. And (3) spreading the mortar material into the bottom plate coated with the waterproof interlayer and the interface adhesive layer.

The process steps are summarized as follows:

1. preparing a cement-based laminate;

2. coating the water-blocking interlayer on the surface of the bottom plate;

3. coating the interface adhesive layer on the water-blocking interlayer;

4. distributing quartz sand/powder filler and epoxy resin adhesive mortar on a bottom plate coated with a water-blocking interlayer and an interface adhesive layer to form composite layer aggregate;

5. feeding the aggregate of the composite layer into a vacuum/vibration box, vacuumizing and vibrating;

6. curing the composite layer aggregate;

7. and (5) processing a finished product.

The performance test results of the epoxy resin-cement-based composite artificial stone plate prepared by the process are as follows:

the above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, decorations, substitutions, combinations, simplifications, which do not depart from the spirit and principle of the present invention, should be regarded as equivalent replacements, and all such modifications are included in the protection scope of the present invention.

Claims

1. The improved process for manufacturing the epoxy resin composite artificial stone plate is characterized in that the composite artificial stone at least comprises a composite plate bottom layer, a double water-blocking interlayer, an interface adhesive layer and a resin mortar concrete surface layer.

2. The improved process for manufacturing an artificial stone slab made of epoxy resin composite as claimed in claim 1, wherein an aqueous waterproof interlayer, a resin carrier waterproof interlayer and an interface adhesive layer are sequentially coated between the bottom layer and the surface layer of the composite board.

3. The improved process for manufacturing artificial stone slab of claim 2, wherein the water-based waterproof interlayer is composed of one or more than one polymer of polyacrylic resin, poly (propylene) resin, poly (vinyl acetate-ethylene) copolymer resin and styrene-butadiene copolymer resin, and inorganic fillers such as film forming agent, wetting agent, defoaming agent, early strength agent, coagulant, silicate cement, quartz sand and light and heavy calcium carbonate.

4. The improved process for manufacturing artificial stone plates made of epoxy resin composite as claimed in claim 2, wherein the resin carrier waterproof interlayer is composed of a resin carrier, a flaky filler, nano silica and other powder fillers. The flaky filler is one or a mixture of mica sheets, ceramic sheets, glass flakes, plastic sheets and other flaky mineral raw materials. The nano silicon dioxide is selected from gas-phase silicon dioxide, precipitated silicon dioxide or micro silicon powder. The carrier resin can be selected from epoxy resin, polyester resin, vinyl ester resin, phenolic resin, cyanate resin and polyurethane resin. The carrier resin is epoxy resin and polyamine as curing agent. The resin carrier waterproof interlayer contains a silane coupling agent.

5. The improved process for manufacturing artificial stone slab of epoxy resin composite as claimed in claim 2, wherein the interfacial adhesive layer is composed of epoxy resin, silane coupling agent, reactive diluent, non-reactive diluent, wetting agent, defoaming agent, curing agent and curing aid. The epoxy resin is bisphenol A epoxy resin. The silane coupling agent is selected from 3- (2, 3-epoxypropoxy) propyl trimethoxy silane and N- (2-aminoethyl) -3-aminopropyl trimethoxy silane. The active diluent is preferably C12-C14AGE, and the inactive solvent is benzyl alcohol and tetrahydrofurfuryl alcohol. The curing agent is selected from mixed amine of naphthenic amine and fatty amine.

6. The improved process for manufacturing artificial stone slab of epoxy resin composite as claimed in claim 1, wherein the surface layer of epoxy resin mortar concrete is epoxy resin mortar concrete, and the bottom plate of the composite slab is cement-based thin plate.

7. The improved process for manufacturing artificial stone slab of claim 6, wherein the resin mortar concrete surface layer is composed of epoxy resin, coupling agent, reactive diluent, non-reactive diluent, wetting agent, polyamine curing agent and aggregate/filler. Firstly, epoxy resin, a coupling agent, a reactive diluent, a non-reactive diluent and a wetting agent are mixed into an adhesive liquid component A with the viscosity of 500-1000cps according to a certain proportion. And then fully mixing the fine powder with the size of more than 300 meshes with the adhesive liquid component A uniformly, storing for at least 30 minutes, then adding the adhesive liquid polyamine B component, stirring uniformly, adding the mixture into sand material with the size of more than 100 meshes, and stirring to obtain the mortar with the slump of 40-50 mm.

8. An improved process for manufacturing artificial stone slab of epoxy resin composite as claimed in any one of claims 2 to 7, wherein the bottom layer of composite board, the double water-blocking barrier layer, the interface adhesive layer and the resin mortar concrete surface layer form a complete composite structure, and the composite structure is fed into a vacuum box to vibrate. The vacuum box is provided with a heating element to maintain the temperature in the vacuum box at 40-45 ℃ so as to assist vacuum to extract the low-boiling-point solvent from the resin mortar. The heating element is preferably an infrared heating tube.

9. An improved process for manufacturing artificial stone slab of epoxy resin composite as claimed in claim 8, wherein the composite artificial stone is processed into final product after being compacted by vacuum vibration and cured.