Toughening anti-cracking high-flexibility thin spraying material as well as preparation method and application thereof

Abstract

The invention discloses a toughened crack-resistant high-flexibility thin spraying material as well as a preparation method and application thereof, and belongs to the technical field of surface sealing, reinforcing and supporting of mine laneway engineering. The toughened crack-resistant high-flexibility thin spraying material is prepared from the following components in parts by mass: 100 parts of a cementing material, 170 to 200 parts of styrene-butadiene emulsion, 40 parts of water, 2 to 15 parts of basalt fiber, 5 to 30 parts of rubber powder, 0.1 to 2 parts of a drier, 0.1 to 2 parts of an accelerator, 0.8 to 5 parts of a curing agent, 1 to 3 parts of a cross-linking agent, 1 to 5 parts of a foaming agent, 0.2 to 1 part of a penetrant, 2.5 to 3 parts of a flame retardant and 3 to 5 parts of a rheological additive. Compared with sprayed concrete, the prepared thin spraying material is thin in spraying layer, high in construction efficiency, low in material consumption, free of dust and low in pollution, and has high flexibility, tensile strength and adhesion performance.

Description

Technical Field

[0001] The present invention relates to the technical field of surface sealing reinforcement and support for mine shaft and tunnel engineering, and more specifically to a toughening, crack-resistant, highly flexible thin-sprayed material, a preparation method thereof, and applications thereof. Background Art

[0002] my country excavates 12,000 km of new tunnels annually, over 80% of which are coal and semi-coal-rock tunnels. Given the massive scale of tunnel construction, maintaining stable and unobstructed tunnels is crucial for safe and efficient coal mining. Currently, the primary support method used in underground coal tunnels in my country is a combination of anchor-grid and shotcrete support. Anchors provide a certain degree of restraint on the tunnel surface, improving the stress state of the surrounding rock. Metal mesh is used to prevent small pieces of surrounding rock from falling off and maintain the triaxial stress state of the surrounding rock deep within the tunnel.

[0003] Shotcrete mainly seals the rock surface to prevent the weathering of the surrounding rock, improves the stress state of the surrounding rock and the supporting structure, and prevents the surrounding rock from falling in massive surrounding rock. However, shotcrete cures slowly and cannot provide support in time at the initial stage of surrounding rock exposure. In addition, shotcrete is a brittle material with low tensile strength and high dust content. The sprayed layer is prone to cracking, peeling or falling off, posing a threat to underground workers. In addition, shotcrete has many disadvantages such as slow construction speed, poor working environment, high material consumption, large auxiliary transportation volume, and many safety hazards. Shotcrete is still an inefficient, high-consumption and high-pollution support method in the entire support system. Therefore, it is of great significance to seek a high-performance support method with high efficiency, low consumption and low pollution. Summary of the Invention

[0004] In response to the above problems, the present invention provides a toughened, crack-resistant, highly flexible thin sprayed material, and its preparation method and application. Compared with shotcrete, the thin sprayed material prepared by the present invention has a thin spray layer, high construction efficiency, low material consumption, no dust, low pollution, and has high flexibility, tensile strength and adhesion properties.

[0005] The first object of the present invention is to provide a toughened, crack-resistant, highly flexible thin-sprayed material, which is composed of the following components in parts by weight:

[0006] 100 parts of cementitious material, 170-200 parts of styrene-butadiene emulsion, 40 parts of water, 2-15 parts of basalt fiber, 5-30 parts of rubber powder, 0.1-2 parts of drying agent, 0.1-2 parts of accelerator, 0.8-5 parts of curing agent, 1-3 parts of cross-linking agent, 1-5 parts of foaming agent, 0.2-1 parts of penetrant, 2.5-3 parts of flame retardant, and 3-5 parts of rheological additive.

[0007] In one embodiment of the present invention, the cementitious material is a mixture of ordinary Portland cement and silica fume;

[0008] Styrene-butadiene emulsion is a styrene-butadiene emulsion.

[0009] In one embodiment of the present invention, the drying agent is one of cyclohexane acid, 2-ethylhexanoic acid, and neohexanoic acid;

[0010] The quick-setting agent is one of triethanolamine, sodium sulfate, and calcium chloride;

[0011] The curing agent is one of benzoyl peroxide, cumene hydroperoxide, and tert-butyl hydroperoxide;

[0012] The crosslinking agent is isocyanate or vinyltriethoxysilane;

[0013] The foaming agent is hydrogen peroxide or aluminum foaming agent;

[0014] The flame retardant is aluminum hydroxide or magnesium hydroxide;

[0015] The penetrant is a sulfonate, phosphate or polyoxyethylene alkylphenol ether;

[0016] The rheological additive is fumed silica.

[0017] A second object of the present invention is to provide a method for preparing the above-mentioned toughened, crack-resistant, highly flexible thin-sprayed material, comprising the following steps:

[0018] Weigh the following components in parts by mass: 100 parts of cementitious material, 170-200 parts of styrene-butadiene emulsion, 40 parts of water, 2-15 parts of basalt fiber, 5-30 parts of rubber powder, 0.1-2 parts of drier, 0.1-2 parts of accelerator, 0.8-5 parts of curing agent, 1-3 parts of cross-linking agent, 1-5 parts of foaming agent, 0.2-1 parts of penetrant, 2.5-3 parts of flame retardant, and 3-5 parts of rheological additive;

[0019] Mixing butadiene styrene emulsion, a drying agent, a cross-linking agent, a penetrant, a curing agent, and water and stirring them uniformly to prepare a mixture A;

[0020] Adding a cementitious material, basalt fiber, rubber powder, an accelerating agent, a foaming agent, a flame retardant and a rheological additive into the mixture A and mixing and stirring the mixture to obtain a mixture B;

[0021] The mixture B is fed into a spray machine for spraying to obtain a toughened, crack-resistant, highly flexible thin spray material.

[0022] In one embodiment of the present invention, when the mixture A is obtained by mixing and stirring, the stirring speed is 100-400 r / min and the stirring time is 3-5 min.

[0023] In one embodiment of the present invention, when the mixture B is obtained by mixing and stirring, the stirring speed is 1000-3000 r / min and the stirring time is 5-10 min.

[0024] In one embodiment of the present invention, during injection, the valve pressure is 0.5-1 MPa.

[0025] The third object of the present invention is to provide the application of the above-mentioned toughening and crack-resistant high-flexibility thin sprayed material in the tunnel. After the coal mine tunnel is cleaned, the toughening and crack-resistant high-flexibility thin sprayed material is used for spraying. During spraying, the wind speed in the coal mine tunnel is less than 6.0m / s.

[0026] In one embodiment of the present invention, the usage of toughening crack-resistant high-flexibility thin spraying material is 1.2-1.5 kg / m 2 .

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) In the present invention, a toughened crack-resistant high-flexibility thin-sprayed material is prepared using a cementitious material, styrene-butadiene emulsion, water, basalt fiber, rubber powder, drying agent, accelerator, curing agent, cross-linking agent, foaming agent, penetrant, flame retardant, and rheological additive as raw materials. Compared with ordinary thin-sprayed materials, the thin-sprayed material has ultra-high flexibility and adhesion. The thin-sprayed material and the anchor rod work together to form a bearing basket on the surface of the coal roadway, playing a supporting role, preventing the loose rock mass from falling off and the cracks from further free diffusion. However, the thin-sprayed material is required to have high bending deformation performance and ductility when playing the role of bearing basket support.

[0029] The toughened, crack-resistant, and highly flexible thin-blasted material of the present invention is formulated with rubber powder to enhance the interfacial bonding between the rubber powder and styrene-butadiene emulsion, thereby increasing its flexibility. Chopped basalt fibers are then added to modify the material to further improve its bending resistance, ductility, toughness, and load-bearing capacity. The toughened, crack-resistant, and highly flexible thin-blasted material of the present invention exhibits excellent flexibility and deforms without cracking, meeting safety requirements for surrounding rock sealing and reinforcement support in coal mine tunnels and preventing coal pillar instability.

[0030] (2) The toughened and crack-resistant high-flexibility thin-sprayed material of the present invention is equipped with a foaming agent. When the thin-sprayed material is constructed through a spraying machine, the thin-sprayed material can penetrate into the joints and cracks of the surrounding rock, bond the broken surrounding rock together, and promote the self-locking of the block. At the same time, after the thin-sprayed material penetrates into the joints and cracks of the surrounding rock, it will foam and expand in time to fill the joints and cracks of the surrounding rock, produce a wedge effect, and improve the adhesion of the thin-sprayed material. Studies have shown that the thin-sprayed material can penetrate into the joints and cracks of the surrounding rock with a width of 1-2mm and a penetration depth of 30-50mm. However, due to the injection pressure and the rebound of the thin-sprayed material, the amount of thin-sprayed material that penetrates into the joints and cracks of the surrounding rock is relatively small, and the effect of promoting the self-locking of the block is general. The present invention is equipped with a foaming agent and a curing agent. After the thin-sprayed material penetrates into the joints and cracks of the surrounding rock, it will foam and solidify quickly, solving the problems of less penetration of the thin-sprayed material into the surrounding rock and the unclear support effect. The toughening and crack-resisting high-flexibility thin sprayed material of the present invention foams in time to fill the joints and cracks of the surrounding rock, promotes self-locking of the blocks, and produces a wedge effect. When the broken surrounding rock falls, it remains stable and does not fall due to insufficient shear expansion space, while also improving the stiffness of the broken surrounding rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 These are photos of the toughened, crack-resistant, highly flexible thin-sprayed material prepared in Example 1 undergoing a tensile test, wherein Figure a is a diagram of the state before stretching, Figure b is a diagram of the state during stretching, and Figure c is a diagram of the state after stretching and fracture.

[0032] Figure 2 These are photos of the toughened, crack-resistant, highly flexible, thin-film sprayed material prepared in Example 9 undergoing tensile testing. Figure a shows the unstretched state, Figure b shows one state during stretching, Figure c shows another state during stretching, and Figure d shows the state after fracture.

[0033] Figure 3 This is a state diagram of the present invention when the toughening and crack-resistant high-flexibility thin spray material is sprayed.

[0034] Figure 4 This is a diagram of the state after the toughening and crack-resistant high-flexibility thin-spray material of the present invention is sprayed. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] The invention provides a toughening, crack-resistant, and highly flexible thin-sprayed material.

[0037] The specific technical solutions are:

[0038] A toughening, crack-resistant, highly flexible thin-spray material, comprising the following components in parts by mass:

[0039] 100 parts of cementitious material, 170-200 parts of styrene-butadiene emulsion, 40 parts of water, 2-15 parts of basalt fiber, 5-30 parts of rubber powder, 0.1-2 parts of drying agent, 0.1-2 parts of accelerator, 0.8-5 parts of curing agent, 1-3 parts of cross-linking agent, 1-5 parts of foaming agent, 0.2-1 parts of penetrant, 2.5-3 parts of flame retardant, and 3-5 parts of rheological additive.

[0040] The cementitious material used in this invention is composed of ordinary Portland cement and silica fume. The ordinary Portland cement used in this invention is P.O42.5, and the mass ratio of ordinary Portland cement to silica fume is 10:1. The ordinary Portland cement serves as the cementitious material powder. Part of the silica reacts with calcium hydroxide, a cement hydration product, to form CSH gel, which promotes cement hydration. The remaining silica fume fills the gaps between cement particles, making the cementitious material more dense. This reduces the setting time of the sprayed material, accelerates cement hydration, increases density, improves stability, enhances resistance to acid salt erosion, increases adhesion and cohesion, and reduces rebound.

[0041] The styrene-butadiene emulsion used in the present invention is a styrene-butadiene emulsion, which has good workability with cement, can improve the tensile strength and adhesion strength of the thin-sprayed material, and enhance the impermeability and wear resistance of the thin-sprayed material.

[0042] The basalt fiber used in the present invention is chopped basalt fiber, which has the advantages of reducing the brittleness of the thin-sprayed material, increasing the tensile toughness of the thin-sprayed material, and improving the bearing strength.

[0043] The rubber powder used in the present invention is rubber powder, which is generally processed from waste tires. Its function is to improve the interfacial bonding strength with styrene-butadiene emulsion and improve the flexibility and toughness of the thin-film spray material. The rubber powder used in the present invention is purchased from Huayi Rubber Products Co., Ltd. in Lujiang County, Anhui Province.

[0044] It should be noted that the presence of zinc stearate in rubber powder reduces the interfacial bonding strength between the rubber powder and the styrene-butadiene emulsion. Therefore, the present invention pre-treats the rubber powder before use. Saturated sodium hydroxide solution is used to remove the zinc stearate from the rubber particles without damaging the physical and mechanical properties of the rubber powder, thereby improving the interfacial bonding strength between the rubber powder and the styrene-butadiene emulsion.

[0045] The specific processing steps are as follows:

[0046] Rubber powder was placed in a saturated NaOH solution and soaked for 40 minutes, then the surface of the rubber powder was washed with clean water. The rubber powder was naturally dried to obtain pretreated rubber powder. Unless otherwise specified, the rubber powder used in the examples of the present invention is the pretreated rubber powder.

[0047] The drying agent used in the present invention includes one of cyclohexane acid, 2-ethylhexanoic acid and neodecanoic acid, which has the advantages of promoting rapid drying and film formation on the surface of the thin spraying material, and has the advantages of tough film formation, long-lasting wear resistance, and UV resistance.

[0048] The curing agent used in the present invention includes one of benzoyl peroxide, isopropyl benzene hydroperoxide, and tert-butyl hydroperoxide, which can promote the rapid solidification of the thin-film sprayed material, achieving initial setting in 30 minutes, final setting in 1 hour, and support strength in 6 hours, thereby reinforcing the surrounding rock in time.

[0049] The crosslinking agent used in the present invention includes one of isocyanate and vinyltriethoxysilane, and its function is to crosslink the polymer to improve the flexibility and bonding strength of the thin-film spraying material.

[0050] The foaming agent used in the present invention is one of hydrogen peroxide and aluminum foaming agent, which can promote the spraying material to penetrate the cracks of the surrounding rock and adhere to the surface of the surrounding rock to foam appropriately, thereby further reinforcing and sealing the surrounding rock.

[0051] The penetrant used in the present invention includes one of sulfonate, phosphate and polyoxyethylene alkylphenol ether, and its function is to reduce the surface tension of the sprayed material and increase the osmotic pressure, so that the sprayed material can more easily penetrate into the joints and cracks of the surrounding rock.

[0052] The flame retardant used in the present invention is one of aluminum hydroxide and magnesium hydroxide, and its function is to flame retard the thin spray material through heat absorption, covering effect, chain reaction inhibition, asphyxiation effect of non-flammable gas, etc.

[0053] The rheological additive used in the present invention is fumed silica, which has the function of ensuring that the thin-film spray material emulsion is dispersed without precipitation, and at the same time preventing the thin-film spray material from sagging during curing, thereby improving the weather resistance and scratch resistance of the thin-film spray material and improving the bonding strength between the spray layer and the substrate. In addition, fumed silica has extremely strong ultraviolet absorption and infrared light reflection properties, and adding it to the coating can improve the coating's anti-aging performance.

[0054] The present invention also provides a method for preparing a toughening, crack-resistant, and highly flexible thin-sprayed material.

[0055] The specific technical solutions are:

[0056] A method for preparing a toughened, crack-resistant, and highly flexible thin-sprayed material comprises the following steps:

[0057] (1) Add styrene-butadiene emulsion and part of the additives into a liquid mixer, stir at a speed of 100-400 r / min for 3-5 minutes, and then send the mixture to a high-speed pulping machine through the bottom opening after stirring evenly.

[0058] (2) Add ordinary Portland cement and some powdered additives into a high-speed pulping machine, stir at a speed of 1000-3000 r / min for 5-10 minutes, and then send the mixture into a storage barrel through the bottom opening after stirring evenly.

[0059] (3) Turn on the power switch and the jet intake valve.

[0060] (4) Adjust the air valve pressure. The pressure gauge value should be adjusted to 0.5MPa~1Mpa, which is within the normal range. Turn on the atomizing air source switch and the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0061] The present invention also provides an application of a toughening and crack-resistant high-flexibility thin-sprayed material in a tunnel.

[0062] The specific technical solutions are:

[0063] The application of a toughening and crack-resistant high-flexibility thin-spray material in a tunnel comprises the following steps:

[0064] (1) Before the construction of thin shotcrete support, the rock (coal) powder and loose rocks on the surface of the surrounding rock must be blown away with high-pressure air to increase the bonding force.

[0065] (2) If there is water spraying, it is necessary to use a water pipe to centrally guide the water out before spraying construction.

[0066] (3) The wind speed in the tunnel during spraying should not be greater than 6.0m / s.

[0067] (4) The powder and liquid materials must be fully stirred to ensure uniform mixing.

[0068] (5) During spraying, the storage tank must be stirred at the same time to prevent the powder from settling and stratifying.

[0069] (6) When spraying, the paint should not be applied too thickly at one time. It should be sprayed in multiple times to avoid flow.

[0070] (7) Do not disturb or spray water within 24 hours after spraying.

[0071] (8) After spraying, the pulping machine, storage tank, diaphragm pump, spray gun, pipeline, etc. should be flushed clean in time to prevent blockage.

[0072] (9) If any leakage, uneven thickness, cracking, etc. are found during the construction process, re-spraying can be done at any time.

[0073] The following is further described with reference to specific embodiments.

[0074] In the following specific examples, unless otherwise specified, all raw materials can be obtained from commercial sources.

[0075] Example 1

[0076] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 3g of basalt fiber, 3g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0077] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0078] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0079] (1) Weigh the following components in parts by mass: 100 g of gelling material, 170 g of styrene-butadiene emulsion, 40 g of water, 3 g of basalt fiber, 3 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0080] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0081] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0082] (3) Turn on the power switch and the jet intake valve.

[0083] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0084] Example 2

[0085] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 3g of basalt fiber, 6g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0086] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0087] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0088] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 3 g of basalt fiber, 6 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0089] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0090] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0091] (3) Turn on the power switch and the jet intake valve.

[0092] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0093] Example 3

[0094] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 3g of basalt fiber, 9g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0095] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0096] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0097] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 3 g of basalt fiber, 9 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0098] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0099] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0100] (3) Turn on the power switch and the jet intake valve.

[0101] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0102] Example 4

[0103] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 3g of basalt fiber, 12g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0104] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0105] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0106] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 3 g of basalt fiber, 12 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0107] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0108] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0109] (3) Turn on the power switch and the jet intake valve.

[0110] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0111] Example 5

[0112] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 6g of basalt fiber, 3g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0113] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0114] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0115] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 6 g of basalt fiber, 3 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0116] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0117] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0118] (3) Turn on the power switch and the jet intake valve.

[0119] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0120] Example 6

[0121] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 9g of basalt fiber, 3g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0122] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0123] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0124] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 9 g of basalt fiber, 3 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0125] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0126] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0127] (3) Turn on the power switch and the jet intake valve.

[0128] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0129] Example 7

[0130] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 6g of basalt fiber, 6g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0131] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0132] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0133] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 6 g of basalt fiber, 6 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0134] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0135] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0136] (3) Turn on the power switch and the jet intake valve.

[0137] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0138] Example 8

[0139] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 6g of basalt fiber, 9g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0140] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0141] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0142] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 6 g of basalt fiber, 9 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0143] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0144] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0145] (3) Turn on the power switch and the jet intake valve.

[0146] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0147] Example 9

[0148] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 6g of basalt fiber, 12g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0149] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0150] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0151] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 6 g of basalt fiber, 12 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0152] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0153] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0154] (3) Turn on the power switch and the jet intake valve.

[0155] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0156] Example 10

[0157] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 9g of basalt fiber, 6g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0158] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0159] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0160] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 9 g of basalt fiber, 6 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0161] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0162] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0163] (3) Turn on the power switch and the jet intake valve.

[0164] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0165] Example 11

[0166] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 9g of basalt fiber, 9g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0167] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0168] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0169] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 9 g of basalt fiber, 9 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0170] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0171] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0172] (3) Turn on the power switch and the jet intake valve.

[0173] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0174] Example 12

[0175] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 9g of basalt fiber, 12g of rubber powder, 0.3g of 2-ethylhexanoic acid as a drying agent, 1g of sodium sulfate as an accelerator, 0.8g of benzoyl peroxide as a curing agent, 1g of vinyl triethoxysilane as a cross-linking agent, 2g of aluminum foaming agent, 0.6g of polyoxyethylene alkylphenol ether as a penetrant, 3g of aluminum hydroxide as a flame retardant, and 3g of fumed silica as a rheological additive.

[0176] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0177] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0178] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 9 g of basalt fiber, 12 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 1 g of sodium sulfate as an accelerator, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0179] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0180] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0181] (3) Turn on the power switch and the jet intake valve.

[0182] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0183] Example 13

[0184] A toughened, crack-resistant, highly flexible thin spray material, the weights of its components being: 100g of cementitious material, 180g of styrene-butadiene emulsion, 40g of water, 15g of basalt fiber, 30g of rubber powder, 0.1g of cyclohexane acid as a drying agent, 2g of sodium sulfate as an accelerator, 0.5g of tert-butyl hydroperoxide as a curing agent, 3g of vinyl triethoxysilane as a cross-linking agent, 1g of hydrogen peroxide as a foaming agent, 1g of potassium dihydrogen phosphate as a penetrant, 2.5g of magnesium hydroxide as a flame retardant, and 5g of fumed silica as a rheological additive.

[0185] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0186] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 180 g of styrene-butadiene emulsion, 40 g of water, 15 g of basalt fiber, 30 g of rubber powder, 0.1 g of cyclohexane acid as a drying agent, 2 g of sodium sulfate as an accelerator, 0.5 g of tert-butyl hydroperoxide as a curing agent, 3 g of vinyl triethoxysilane as a crosslinking agent, 1 g of hydrogen peroxide as a foaming agent, 1 g of potassium dihydrogen phosphate as a penetrant, 2.5 g of magnesium hydroxide as a flame retardant, and 5 g of fumed silica as a rheological additive;

[0187] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 400 r / min for 3 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0188] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 3000 r / min for 10 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0189] (3) Turn on the power switch and the jet intake valve.

[0190] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 0.8Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0191] Example 14

[0192] A toughening and crack-resistant high-flexibility thin spray material, the weights of its components are: 100g of cementitious material, 200g of styrene-butadiene emulsion, 40g of water, 2g of basalt fiber, 5g of rubber powder, 2g of drying agent neodecanoic acid, 0.1g of accelerator sodium sulfate, 3g of curing agent isopropyl benzene hydroperoxide, 1g of cross-linking agent isocyanate, 5g of foaming agent aluminum foaming agent, 0.2g of penetrant sodium sulfonate, 2.8g of flame retardant aluminum hydroxide, and 4g of rheological additive fumed silica.

[0193] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0194] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 200 g of styrene-butadiene emulsion, 40 g of water, 2 g of basalt fiber, 5 g of rubber powder, 2 g of drier (neodecanoic acid), 0.1 g of accelerator (sodium sulfate), 3 g of curing agent (cumene hydroperoxide), 1 g of cross-linking agent (isocyanate), 5 g of foaming agent (aluminum foaming agent), 0.2 g of penetrant (sodium sulfonate), 2.8 g of flame retardant (aluminum hydroxide), and 4 g of rheological additive (fumed silica).

[0195] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 200 r / min for 4 minutes, stirring evenly to obtain a mixture A, and delivering the mixture to a high-speed pulping machine through a bottom opening;

[0196] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 2000 r / min for 7 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0197] (3) Turn on the power switch and the jet intake valve.

[0198] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 0.5Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0199] Comparative Example 1

[0200] A toughening and crack-resistant high-flexibility thin spray material, the weights of its components are: 100g of P.O42.5 cement, 170g of styrene-butadiene emulsion, 40g of water, 3g of basalt fiber, 3g of rubber powder, 0.3g of drying agent 2-ethylhexanoic acid, 1g of accelerator sodium sulfate, 0.8g of curing agent benzoyl peroxide, 1g of cross-linking agent vinyl triethoxysilane, 2g of foaming agent aluminum foaming agent, 0.6g of penetrant polyoxyethylene alkylphenol ether, 3g of flame retardant aluminum hydroxide, and 3g of rheological additive fumed silica.

[0201] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0202] (1) Weigh the following components in parts by mass: PO42.5 cement 100 g, styrene-butadiene emulsion 170 g, water 40 g, basalt fiber 3 g, rubber powder 3 g, drier 2-ethylhexanoic acid 0.3 g, curing agent benzoyl peroxide 0.8 g, crosslinking agent vinyl triethoxysilane 1 g, foaming agent aluminum foaming agent 2 g, penetrant polyoxyethylene alkylphenol ether 0.6 g, flame retardant aluminum hydroxide 3 g, rheological additive fumed silica 3 g;

[0203] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0204] P.O42.5 cement, basalt fiber, rubber powder, accelerator, foaming agent, flame retardant and rheological additive are added to a high-speed pulper and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0205] (3) Turn on the power switch and the jet intake valve.

[0206] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0207] Comparative Example 2

[0208] 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 3g of chopped carbon fiber, 3g of rubber powder, 0.3g of drying agent 2-ethylhexanoic acid, 1g of accelerator sodium sulfate, 0.8g of curing agent benzoyl peroxide, 1g of cross-linking agent vinyltriethoxysilane, 2g of foaming agent aluminum foaming agent, 0.6g of penetrant polyoxyethylene alkylphenol ether, 3g of flame retardant aluminum hydroxide, and 3g of rheological additive fumed silica.

[0209] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0210] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0211] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of styrene-butadiene emulsion, 40 g of water, 3 g of chopped carbon fiber, 3 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0212] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0213] Cementitious material, chopped carbon fiber, rubber powder, accelerator, foaming agent, flame retardant and rheological additive are added to a high-speed pulper and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0214] (3) Turn on the power switch and the jet intake valve.

[0215] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0216] Comparative Example 3

[0217] 100g of cementitious material, 170g of styrene-butadiene emulsion, 40g of water, 3g of basalt fiber, 0.3g of drying agent 2-ethylhexanoic acid, 1g of accelerator sodium sulfate, 0.8g of curing agent benzoyl peroxide, 1g of cross-linking agent vinyltriethoxysilane, 2g of foaming agent aluminum foaming agent, 0.6g of penetrant polyoxyethylene alkylphenol ether, 3g of flame retardant aluminum hydroxide, and 3g of rheological additive fumed silica.

[0218] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0219] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0220] (1) Weigh the following components in parts by mass: 100 g of gelling material, 170 g of styrene-butadiene emulsion, 40 g of water, 3 g of basalt fiber, 0.3 g of 2-ethylhexanoic acid as a drying agent, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0221] (2) adding styrene-butadiene emulsion, drier, crosslinker, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to obtain a mixture A, and delivering the mixture A to a high-speed pulping machine through a bottom opening;

[0222] Cementitious material, basalt fiber, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0223] (3) Turn on the power switch and the jet intake valve.

[0224] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0225] Comparative Example 4

[0226] 100g of cementitious material, 170g of acrylic emulsion, 40g of water, 3g of basalt fiber, 3g of rubber powder, 0.3g of drying agent 2-ethylhexanoic acid, 1g of accelerator sodium sulfate, 0.8g of curing agent benzoyl peroxide, 1g of cross-linking agent vinyltriethoxysilane, 2g of foaming agent aluminum foaming agent, 0.6g of penetrant polyoxyethylene alkylphenol ether, 3g of flame retardant aluminum hydroxide, and 3g of rheological additive fumed silica.

[0227] The cementitious material used in this embodiment is prepared from P.O42.5 cement and silica fume in a mass ratio of 10:1.

[0228] The toughened and crack-resistant high-flexibility thin-sprayed material is prepared according to the following steps:

[0229] (1) Weigh the following components in parts by mass: 100 g of cementitious material, 170 g of acrylic emulsion, 40 g of water, 3 g of basalt fiber, 3 g of rubber powder, 0.3 g of 2-ethylhexanoic acid as a drying agent, 0.8 g of benzoyl peroxide as a curing agent, 1 g of vinyl triethoxysilane as a crosslinking agent, 2 g of aluminum foaming agent, 0.6 g of polyoxyethylene alkylphenol ether as a penetrant, 3 g of aluminum hydroxide as a flame retardant, and 3 g of fumed silica as a rheological additive;

[0230] (2) adding acrylic emulsion, drying agent, crosslinking agent, penetrant, curing agent, and water into a liquid mixer, stirring at a speed of 300 r / min for 5 minutes, stirring evenly to prepare a mixture A, and delivering it to a high-speed pulping machine through a bottom opening;

[0231] Cementitious material, basalt fiber, rubber powder, accelerating setting agent, foaming agent, flame retardant and rheological additive are added into a high-speed pulping machine and stirred with mixture A at a speed of 1000 r / min for 5 minutes. After stirring evenly, the obtained mixture B is delivered to the storage barrel through the bottom opening.

[0232] (3) Turn on the power switch and the jet intake valve.

[0233] (4) Adjust the air valve pressure. The pressure value of the pressure gauge should be adjusted to 1Mpa, which is within the normal range. Turn on the atomizing air source switch and turn on the spray gun safety switch to allow the thin spray material to be sprayed out from the nozzle.

[0234] Table 1 Properties of toughened crack-resistant high-flexibility sprayed materials prepared in Examples 1 to 12

[0235] Table 2 Properties of the thin-spray materials prepared in Example 1 and Comparative Examples 1-4

[0236]

[0237] Table 3 Performance parameters of toughened crack-resistant high-flexibility sprayed materials prepared in Example 12

[0238] As shown in Tables 1-3, varying the amount of metabasalt can improve the tensile strength and bonding strength of the sprayed material, while adding rubber powder can increase its elongation. In Comparative Examples 1-4, changes in the materials can degrade certain properties and fail to improve all properties of the sprayed material. Compared to Comparative Examples 1-4, the components of the present invention interact with each other to improve the tensile strength and elongation of the sprayed material.

[0239] Figure 1 and Figure 2 The following figures show the stretching process of Examples 1 and 9, respectively. The toughened, crack-resistant, and highly flexible sprayed material prepared by the present invention exhibits high elongation. Sprayed material is a flexible support material that adheres tightly to the surrounding rock surface, exerting a "netting" effect and collaborating with the surrounding rock when deformation occurs.

[0240] Before using the toughening crack-resistant high-soft thin spraying material of the present invention for construction, it is necessary to clean the rock (coal) powder and loose live rock on the surface of the surrounding rock. If there is water spraying, it is necessary to drain the water before spraying. The amount of toughening crack-resistant high-soft thin spraying material used during spraying is 1.2-1.5kg / m 2 .like Figure 3 As shown, the present invention adopts 1.36kgm 2 The usage amount is sprayed, and the state after spraying is as shown in the figure Figure 4 As shown in the figure, it can be seen that after spraying with the toughening crack-resistant high-flexibility thin spray material prepared by the present invention, the surface texture of the surrounding rock is uniform and the spraying effect is good. The toughening crack-resistant high-flexibility thin spray material used by the present invention is used in a small amount and the spray layer is thin. The toughening crack-resistant high-flexibility thin spray material prepared by the present invention is easy to operate and has high construction efficiency.

[0241] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0242] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A toughening and crack-resistant high-flexibility thin-spray material, characterized in that: It is composed of the following components in parts by mass: 100 parts of cementitious material, 170-200 parts of styrene-butadiene emulsion, 40 parts of water, 2-15 parts of basalt fiber, 5-30 parts of rubber powder, 0.1-2 parts of drying agent, 0.1-2 parts of accelerator, 0.8-5 parts of curing agent, 1-3 parts of cross-linking agent, 1-5 parts of foaming agent, 0.2-1 parts of penetrant, 2.5-3 parts of flame retardant, and 3-5 parts of rheological additive.

2. The toughened, crack-resistant, and highly flexible thin-sprayed material according to claim 1, characterized in that: The cementitious material is a mixture of ordinary Portland cement and silica fume; Styrene-butadiene emulsion is a styrene-butadiene emulsion.

3. The toughened, crack-resistant, and highly flexible thin-sprayed material according to claim 1, characterized in that: The drying agent is one of cyclohexane acid, 2-ethylhexanoic acid and neohexanoic acid; The quick-setting agent is one of triethanolamine, sodium sulfate, and calcium chloride; The curing agent is one of benzoyl peroxide, cumene hydroperoxide, and tert-butyl hydroperoxide; The crosslinking agent is isocyanate or vinyltriethoxysilane; The foaming agent is hydrogen peroxide or aluminum foaming agent; The flame retardant is aluminum hydroxide or magnesium hydroxide; The penetrant is a sulfonate, phosphate or polyoxyethylene alkylphenol ether; The rheological additive is fumed silica.

4. A method for preparing the toughened, crack-resistant, highly flexible thin-sprayed material according to any one of claims 1 to 3, characterized in that: The following steps are involved: Weigh the following components in parts by mass: 100 parts of cementitious material, 170-200 parts of styrene-butadiene emulsion, 40 parts of water, 2-15 parts of basalt fiber, 5-30 parts of rubber powder, 0.1-2 parts of drier, 0.1-2 parts of accelerator, 0.8-5 parts of curing agent, 1-3 parts of cross-linking agent, 1-5 parts of foaming agent, 0.2-1 parts of penetrant, 2.5-3 parts of flame retardant, and 3-5 parts of rheological additive; Mixing butadiene styrene emulsion, a drying agent, a cross-linking agent, a penetrant, a curing agent, and water and stirring them uniformly to prepare a mixture A; Adding a cementitious material, basalt fiber, rubber powder, an accelerating agent, a foaming agent, a flame retardant and a rheological additive into the mixture A and mixing and stirring the mixture to obtain a mixture B; The mixture B is fed into a spray machine for spraying to obtain a toughened, crack-resistant, highly flexible thin spray material.

5. The method for preparing a toughened, crack-resistant, and highly flexible thin-sprayed material according to claim 4, characterized in that: When the mixture A is obtained by mixing and stirring, the stirring speed is 100-400 r / min and the stirring time is 3-5 min.

6. The method for preparing a toughened, crack-resistant, and highly flexible thin-sprayed material according to claim 4, characterized in that: When the mixture B is obtained by mixing and stirring, the stirring speed is 1000-3000 r / min and the stirring time is 5-10 min.

7. The method for preparing a toughened, crack-resistant, and highly flexible thin-sprayed material according to claim 4, characterized in that: During injection, the air valve pressure is 0.5-1MPa.

8. Application of the toughening and crack-resistant high-flexibility thin-sprayed material according to any one of claims 1 to 3 in a tunnel, characterized in that: After cleaning the coal mine tunnel, it is sprayed with toughening and crack-resistant high-flexibility thin spraying material. During spraying, the wind speed in the coal mine tunnel is less than 6.0m / s.

9. The use of a toughening and crack-resistant high-flexibility thin-sprayed material in a tunnel according to claim 8, characterized in that: The usage of toughening and crack-resistant high-flexibility thin spraying material is 1.2-1.5kg / m 2 .

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