CN117024058B - Environment-friendly inorganic flexible composite material and preparation and use methods thereof - Google Patents
Environment-friendly inorganic flexible composite material and preparation and use methods thereof Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
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- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
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- C04B2111/20—Resistance against chemical, physical or biological attack
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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Abstract
The invention belongs to the technical field of coal mine safety protection spraying airtight materials, and particularly relates to an environment-friendly inorganic flexible composite material and a preparation and use method thereof. The environment-friendly inorganic flexible composite material comprises the following components in parts by weight: 40% -75% of novel environment-friendly cementing material, 10% -45% of inorganic reinforcing filler, 3% -10% of toughening agent, 3% -8% of composite crosslinking film forming agent, 3% -6% of composite reinforcing steel bar rust inhibitor, 0.3% -3% of composite flame retardant, 0.1% -0.5% of rheology modifier, 0.01% -0.2% of reinforcing impervious agent and 0.01% -0.3% of sagging resistant agent. The environment-friendly inorganic flexible composite material has the advantages of wall built-up property, gas resistance, water resistance, strong adhesiveness, high ductility, suitability for thin layer construction, safety, environmental protection and convenience in construction, and is thin in spraying thickness, good in spraying layer cementation, compact in structure, good in sealing effect, smooth in surface, free of rebound, fast in solidification and free of dust when being used as a thin spraying material, and the spraying speed and quality of a coal mine roadway are greatly improved.
Description
Technical Field
The invention belongs to the technical field of coal mine safety protection spraying airtight materials, and particularly relates to an environment-friendly inorganic flexible composite material and a preparation and use method thereof.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
Geological conditions and environmental conditions faced by tunnel engineering are increasingly complex, and disasters such as fire, gas, dust, roof, water and the like exist in the exploitation process. Part of coal mines, especially coal mines greatly affected by rock burst, are easy to shear and damage, expand and even mutually communicate at weak interfaces such as joint cracks in the coal rock mass in the mining process, and finally lead to unstable coal rock mass structure and induce safety accidents such as roof collapse, caving and caving; in a high-gas mine, gas is easy to be generated and gushed out in coal rock mass cracks, and fire and explosion are easy to be caused. The traditional coal-rock mass sealing material is sprayed concrete, and has the advantages of high compressive strength and capability of bearing certain pressure. However, the defects are very remarkable, firstly, the construction process is complex, the labor intensity of workers is high, and the spraying speed is low; secondly, the rebound rate of the sprayed concrete is high, and the cost is high; thirdly, the dust concentration is high, and the construction site environment is poor; fourthly, the material permeability is low, the cohesive force is poor, and the spray layer is easy to fall off.
In recent years, thin spray materials are gradually introduced into the market, and two types of products are mainly used; respectively organic high molecular and cement-based inorganic composite. The organic polymer materials have great disadvantages, and are mainly characterized in the following aspects: firstly, the high reaction heat is easy to cause heat accumulation; secondly, toxic and harmful gases such as benzene, toluene, xylene and the like are easily volatilized in the reaction process, so that the health of workers is endangered; thirdly, when a fire disaster occurs, toxic and harmful gases are generated when the polymer spraying material is ignited, and secondary injury is caused. The cement-based inorganic composite thin spraying material has short plates with immature technology, unfinished construction equipment, poor using effect, high cost and the like, so that the popularization and use progress in the current market is slow. And the polymer rubber powder added into part of the cement-based inorganic composite material is single in type, only a part of the polymer rubber powder is emulsified to improve the flexibility of the material, most of the polymer rubber powder only plays a role of serving as a filler, so that great waste is caused, the price of the material is high, and meanwhile, excessive filling rubber powder is added, the combustion performance of a solidified body after the material is solidified by adding water can not reach the A1 non-combustion standard, and the safety and environmental protection performance of the material are greatly reduced. Thus, the method is applicable to a variety of applications. The development of a green and environment-friendly safe protective spraying sealing material is very necessary.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an environment-friendly inorganic flexible composite material and a preparation and use method thereof.
In order to achieve the above object, the present invention is realized by the following technical scheme:
In a first aspect, the invention provides an environment-friendly inorganic flexible composite material, which comprises the following components in parts by weight:
40% -75% of novel environment-friendly cementing material, 10% -45% of inorganic reinforcing filler, 3% -10% of toughening agent, 3% -8% of composite crosslinking film forming agent, 3% -6% of composite reinforcing steel bar rust inhibitor, 0.3% -3% of composite flame retardant, 0.1% -0.5% of rheology modifier, 0.01% -0.2% of reinforcing impervious agent and 0.01% -0.3% of sagging resistant agent;
The novel environment-friendly cementing material is obtained by drying and grinding after high-temperature calcination according to the weight ratio of blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone of 8:2:3:2:2:3;
the toughening agent consists of ethylene-vinyl acetate rubber powder, polyvinyl alcohol rubber powder and PP fibers in a weight ratio of 1-5:1:1.
Preferably, the novel environment-friendly cementing material is obtained by calcining the novel environment-friendly cementing material for 1h at a high temperature of 800-1000 ℃ in a weight ratio of 8:2:3:2:2:3 of blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone, and then drying and grinding the novel environment-friendly cementing material until the specific surface area is more than 800m 2/kg.
Preferably, the inorganic reinforcing material comprises one or more of silica fume, talcum powder, silicon dioxide powder, double fly powder, titanium white powder and calcium carbonate powder. The inorganic reinforcing material is used for filling small gaps among particles to form scientific particle grading and improve strength.
Preferably, the composite crosslinking film forming agent consists of modified bentonite, borax and silicate in a weight ratio of 0.9-1.1:0.5:2.
Preferably, the composite steel bar rust inhibitor consists of phosphate, polyhydroxy compound or metal salt thereof and sodium dodecyl sulfate in a weight ratio of 4.5-5.5:5:1; the composite flame retardant consists of aluminum hydroxide and antimony trioxide in a weight ratio of 1:1-3.
Preferably, the rheology modifier comprises one or more of a polycarboxylate water reducer, a naphthalene water reducer and an aliphatic water reducer.
Preferably, the enhanced barrier agent comprises one or more of silicone defoamer and calcium stearate.
Preferably, the anti-sagging agent comprises two or more of hydroxypropyl methylcellulose, hydroxypropyl starch ether, polyvinylpyrrolidone, sodium polyacrylate and polyacrylamide. The viscosity of the slurry can be changed after the anti-sagging agent is added, so that the wall hanging property of the slurry is improved.
In a second aspect, the invention provides a method for preparing the green environment-friendly inorganic flexible composite material according to the first aspect, which comprises the following steps:
And calcining the blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone in a weight ratio of 8:2:3:2:2:3 at high temperature, and drying and grinding to obtain the novel environment-friendly cementing material.
The novel environment-friendly cementing material, the inorganic reinforcing filler, the toughening agent, the composite crosslinking film forming agent, the composite reinforcing steel bar rust inhibitor, the composite flame retardant, the rheology modifier, the reinforcing impervious agent and the sagging resistant agent are mixed in a dry mixer and then packaged by a packaging machine to obtain the environment-friendly inorganic flexible composite material.
In a third aspect, the present invention provides a method for using the green environmental-friendly inorganic flexible composite material according to the first aspect, comprising the following steps:
After the green environment-friendly inorganic flexible composite material according to the first aspect is transported to the site, the composite material is put into a spraying pump truck of an integrated stirring and spraying machine after opening a bag, and is mixed with water to be used for spraying a roadway.
The beneficial effects obtained by one or more of the technical schemes of the invention are as follows:
The environment-friendly inorganic flexible composite material has the following performance advantages:
1. Good wall built-up property
The green environment-friendly inorganic flexible composite material has the double bonding strength with the coal rock wall and the metal reaching more than 2.5MPa, has strong adhesive force, is anti-aging and not falling off, and can effectively prevent the coal rock layer from weathering and the metal net from being corroded; the environment-friendly inorganic flexible composite material has micro-expansion and no shrinkage in the curing process, and has good anti-cracking and anti-deformation properties; the high-efficiency water reducing agent is added into the green environment-friendly inorganic flexible composite material, so that the effects of reducing water consumption, preventing cement cracking and improving compressive strength are achieved; meanwhile, substances such as a rheology modifier and the like are added, so that the wall-hanging property of the green environment-friendly inorganic flexible composite material is improved, the green environment-friendly inorganic flexible composite material is firm in self and adhesion with the surface of a rock stratum, difficult to disperse, good in cohesiveness and free of rebound.
2. Waterproof and waterproof property against gas
The spray material is nontoxic, nonflammable, antistatic, safe and environment-friendly. The thickness of the spraying layer on the surface of the bare coal rock layer reaches more than 2mm, the spraying layer is uniform, the plugging is complete, no leak exists, and water is isolated; the deformation of the roadway and the separation of the roof are reduced compared with the traditional spraying, and the drawing force of the anchor rod is improved. The waterproof material is introduced into the green environment-friendly inorganic flexible composite material in the formula, so that the green environment-friendly inorganic flexible composite material has certain waterproof performance. Polymer gum powder (in powder form) was selected for dry blending formulations. The polymer rubber powder can form a polymer membranous substance in cement by matching with a composite crosslinking film forming agent when the cement is hydrated, plays a role in preventing cement hydrate from cracking and water seepage, and enables the spraying support material to play roles in supporting, preventing water and fire, preventing gas leakage and the like, so that the polymer rubber powder has important roles and significance in improving the environment of an exploitation site and preventing water, fire and gas in a whole coal mine tunnel.
3. Strong adhesion
The toughening agent rubber powder doped in the green environment-friendly inorganic flexible composite material is a multi-polar material, and the molecular chain of the toughening agent rubber powder is provided with a large number of polar functional groups which have extremely strong adhesion to the surface of a rock stratum. In the invention, the ethylene-vinyl acetate rubber powder and the polyvinyl alcohol rubber powder also form an electrostatic barrier for blocking the flocculation of cement particles in the cement slurry, so that the adhesion of the surfaces of the cement particles is enhanced, the viscosity of the slurry of the thin spraying material is increased, sagging is reduced, the one-time spraying thickness can be increased to 5mm, and the larger spraying thickness can be achieved by using fewer spraying times. Secondly, the synergistic effect of the toughening agent and the crosslinking film forming agent obviously shortens the film forming time of the thin spraying material (from about 45min of common materials to about 20 min), increases the plastic viscosity and the dynamic yield stress of the slurry, and can be well bonded together after the slurry is sprayed, so that the flowing of the slurry is obviously reduced, and no rebound exists. The adhesive strength of the composite material is far greater than that of other cement-based inorganic cementing materials, the green environment-friendly inorganic flexible composite material is firmly combined with a coal stratum, and the composite material plays a role in sealing and protecting the stratum and has very important significance.
4. High ductility
The traditional inorganic cement composite material is completely inorganic, has higher compressive strength but is inelastic after hardening, is hard-combined with the surface of the rock stratum, and when the coal stratum is pressed along with the movement of the crust or the coal mining blasting generates vibration, the spraying material can crack, collapse and fall off along with the vibration, so that the supporting and protecting effects are lost. According to the green environment-friendly inorganic flexible composite material, the toughening agent and the crosslinking film forming agent are added at the same time, the toughening agent and the hydration product of the novel environment-friendly cementing material form an elastic film which is interpenetrated and continuous and compact, the toughness of the material is obviously increased, the material is not easy to bend and crack, and the test result shows that the average elongation at break of the green environment-friendly inorganic flexible composite material is more than 180%, and compared with the traditional thin spraying material, the material is obviously improved. The main reason is that firstly, the cement particles are coated and modified by utilizing the hydroxyl groups in the toughening agent and the hydrogen bonds on the surfaces of the cement-based particles, so that products such as C-S-H gel and the like generated by hydration of different cement particles are prevented from flocculating to form a winding similar to fiber aggregation, more mixing water which is wrapped by a flocculating structure is released, more mixing water is used for emulsifying the ethylene-vinyl acetate rubber powder, and the problem of insufficient emulsification of the ethylene-vinyl acetate rubber powder is solved. The hydration products of the cement particles after the coating modification of the crosslinking film forming agent are mutually connected to form a network structure. On the basis, the ethylene-vinyl acetate rubber powder is adhered to the surfaces of the network structures after being emulsified to form an organic-inorganic composite elastic membrane which is interpenetrated and continuous and compact, and the elastic membrane is mixed with PP fibers, so that the toughness of the green environment-friendly inorganic flexible composite material can be remarkably improved.
In the novel dry-mixed formula, the addition of the composite modifier changes the traditional inorganic cement-based green environment-friendly inorganic flexible composite material into a hard state, and has certain elasticity, the extensibility of the green environment-friendly inorganic flexible composite material can reach more than 11%, the material can change along with the geological change of a coal stratum, the combination with the surface of the coal stratum is always kept, and the sealing and protecting effects are always achieved.
5. Is suitable for thin layer construction
The traditional green environment-friendly inorganic flexible composite material has single formula and poor adhesion with rock, so that the thickness required to be sprayed is increased, and the composite material can be effectively adhered to the rock surface, but the adhesion of slurry is greatly improved due to the fact that the green environment-friendly inorganic flexible composite material contains a large amount of active and strong polar group modified substances; the method can reduce the adverse effect caused by the increase of the cost caused by the new material in unit volume, the spraying material realizes the average spraying roadway of 400-500m 2 per class, the construction speed is high, the rebound-free comprehensive cost is far lower than that of spraying coagulation, and the method has the advantages of low labor intensity of workers, less dust, good working environment and good economic and social benefits.
6. Safety and environmental protection
As the formula is selected and does not contain formaldehyde, organic solvent, benzene, dimethylbenzene and other toxic and harmful substances and any radioactive substances, no heat is released, the environment-friendly inorganic flexible composite material does not pollute and poison the environment and operators when being used on site.
7. Convenient construction
The green environment-friendly inorganic flexible composite material is uniformly mixed when leaving factories, is quantitatively packaged into bags, does not need to be matched with other materials, is uniformly mixed and stirred, is quantitatively packaged (generally 25 kg/bag) into bags, and can be packaged by using plastic-lined kraft paper bags or film-covered plastic woven bags. After the materials are transported to an underground mining site, the materials are put into a spraying pump truck after being unpacked, and are mixed with water according to a designed water-cement ratio, so that the materials can be used for spraying a roadway.
The environment-friendly inorganic flexible composite material prepared by adopting the proportion and the process has the advantages that the one-time spraying thickness is 3-5mm when the environment-friendly inorganic flexible composite material is used as a spraying material, 400-500m 2 can be sprayed per small class, the spraying thickness is thin, the spraying layer has good cementation, the structure is compact, the sealing effect is good, the surface is smooth, no rebound exists, the solidification is fast, no dust exists, and the spraying speed and the spraying quality of a coal mine tunnel are greatly improved.
Detailed Description
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail below with reference to specific examples and comparative examples.
Example 1
The environment-friendly inorganic flexible composite material comprises the following components in parts by weight:
75% of novel environment-friendly cementing material, 10% of inorganic reinforcing filler, 3% of toughening agent, 3% of composite crosslinking film forming agent, 5% of composite reinforcing steel bar rust inhibitor, 3% of composite flame retardant, 0.5% of rheology modifier, 0.2% of reinforcing impervious agent and 0.3% of sagging resistant agent.
The novel environment-friendly cementing material is prepared from blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone in the weight ratio of 8:2:3:2:2:3 by calcining at 1000 ℃ for 1h, and then drying and grinding until the specific surface area is more than 800m < 2 >/kg. The toughening agent consists of ethylene-vinyl acetate rubber powder, polyvinyl alcohol rubber powder and PP fibers in a weight ratio of 1:1:1. The inorganic reinforcing material is silica fume. The composite crosslinking film forming agent consists of modified bentonite, borax and silicate in the weight ratio of 1:0.5:2. The composite steel bar rust inhibitor consists of phosphate, polyhydroxy compound or metal salt thereof and sodium dodecyl sulfate in the weight ratio of 5:5:1. The flame retardant consists of aluminum hydroxide and antimony trioxide in the weight ratio of 1:1. The rheology modifier is a polycarboxylate water reducer. The anti-permeability agent is calcium stearate. The anti-sagging agent is hydroxypropyl methylcellulose and hydroxypropyl starch ether.
The novel environment-friendly cementing material, the inorganic reinforcing filler, the toughening agent, the composite crosslinking film forming agent, the composite reinforcing steel bar rust inhibitor, the composite flame retardant, the rheology modifier, the reinforcing impervious agent and the sagging resistant agent are mixed in a dry mixer for 10 minutes, and then packaged by a packaging machine to obtain the environment-friendly inorganic flexible composite material.
Example 2
The environment-friendly inorganic flexible composite material comprises the following components in parts by weight:
75% of novel environment-friendly cementing material, 10% of inorganic reinforcing filler, 3% of toughening agent, 3% of composite crosslinking film forming agent, 5% of composite reinforcing steel bar rust inhibitor, 3% of composite flame retardant, 0.5% of rheology modifier, 0.2% of reinforcing impervious agent and 0.3% of sagging resistant agent.
The novel environment-friendly cementing material is prepared from blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone in the weight ratio of 8:2:3:2:2:3 by calcining at 1000 ℃ for 1h, and then drying and grinding until the specific surface area is more than 800m <2 >/kg. The toughening agent consists of ethylene-vinyl acetate rubber powder, polyvinyl alcohol rubber powder and PP fibers in a weight ratio of 5:1:1. The inorganic reinforcing material is talcum powder. The composite crosslinking film forming agent consists of modified bentonite, borax and silicate in the weight ratio of 1:0.5:2. The composite steel bar rust inhibitor consists of phosphate, polyhydroxy compound or metal salt thereof and sodium dodecyl sulfate in the weight ratio of 5:5:1. The composite flame retardant consists of aluminum hydroxide and antimony trioxide in a weight ratio of 1:1. The rheology modifier is a polycarboxylate water reducer. The anti-permeability agent is calcium stearate. The anti-sagging agent is hydroxypropyl methylcellulose and hydroxypropyl starch ether.
The novel environment-friendly cementing material, the inorganic reinforcing filler, the toughening agent, the composite crosslinking film forming agent, the composite reinforcing steel bar rust inhibitor, the composite flame retardant, the rheology modifier, the reinforcing impervious agent and the sagging resistant agent are mixed in a dry mixer for 10 minutes, and then packaged by a packaging machine to obtain the environment-friendly inorganic flexible composite material.
Example 3
The environment-friendly inorganic flexible composite material comprises the following components in parts by weight:
40% of novel environment-friendly cementing material, 30% of inorganic reinforcing filler, 10% of toughening agent, 3% of composite crosslinking film forming agent, 3% of composite reinforcing steel bar rust inhibitor, 3% of composite flame retardant, 0.5% of rheology modifier, 0.2% of reinforcing impervious agent and 0.3% of sagging resistant agent.
The novel environment-friendly cementing material is prepared from blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone in the weight ratio of 8:2:3:2:2:3 by calcining at 1000 ℃ for 1h, and then drying and grinding until the specific surface area is more than 800m < 2 >/kg. The toughening agent consists of ethylene-vinyl acetate rubber powder, polyvinyl alcohol rubber powder and PP fibers in a weight ratio of 1:1:1. The inorganic reinforcing material is silicon dioxide powder. The composite crosslinking film forming agent consists of modified bentonite, borax and silicate in the weight ratio of 1:0.5:2. The composite steel bar rust inhibitor consists of phosphate, polyhydroxy compound or metal salt thereof and sodium dodecyl sulfate in the weight ratio of 5:5:1. The flame retardant consists of aluminum hydroxide and antimony trioxide in the weight ratio of 1:1-3. The rheology modifier is a polycarboxylate water reducer. The anti-permeability agent is calcium stearate. The anti-sagging agent is hydroxypropyl methylcellulose and hydroxypropyl starch ether.
The novel environment-friendly cementing material, the inorganic reinforcing filler, the toughening agent, the composite crosslinking film forming agent, the composite reinforcing steel bar rust inhibitor, the composite flame retardant, the rheology modifier, the reinforcing impervious agent and the sagging resistant agent are mixed in a dry mixer for 10 minutes, and then packaged by a packaging machine to obtain the environment-friendly inorganic flexible composite material.
Example 4
The environment-friendly inorganic flexible composite material comprises the following components in parts by weight:
40% of novel environment-friendly cementing material, 30% of inorganic reinforcing filler, 10% of toughening agent, 3% of composite crosslinking film forming agent, 3% of composite reinforcing steel bar rust inhibitor, 3% of composite flame retardant, 0.5% of rheology modifier, 0.2% of reinforcing impervious agent and 0.3% of sagging resistant agent.
The novel environment-friendly cementing material is prepared from blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone in the weight ratio of 8:2:3:2:2:3 by calcining at 1000 ℃ for 1h, and then drying and grinding until the specific surface area is more than 800m < 2 >/kg. The toughening agent consists of ethylene-vinyl acetate rubber powder, polyvinyl alcohol rubber powder and PP fibers in a weight ratio of 3:1:1. The inorganic reinforcing material is silica fume. The composite crosslinking film forming agent consists of modified bentonite, borax and silicate in the weight ratio of 1:0.5:2. The composite steel bar rust inhibitor consists of phosphate, polyhydroxy compound or metal salt thereof and sodium dodecyl sulfate in the weight ratio of 5:5:1. The composite flame retardant consists of aluminum hydroxide and antimony trioxide in a weight ratio of 1:1. The rheology modifier is a polycarboxylate water reducer. The anti-permeability agent is calcium stearate. The anti-sagging agent is hydroxypropyl methylcellulose and hydroxypropyl starch ether.
The novel environment-friendly cementing material, the inorganic reinforcing filler, the toughening agent, the composite crosslinking film forming agent, the composite reinforcing steel bar rust inhibitor, the composite flame retardant, the rheology modifier, the reinforcing impervious agent and the sagging resistant agent are mixed in a dry mixer for 10 minutes, and then packaged by a packaging machine to obtain the environment-friendly inorganic flexible composite material.
Example 5
The environment-friendly inorganic flexible composite material comprises the following components in parts by weight:
40% of novel environment-friendly cementing material, 30% of inorganic reinforcing filler, 10% of toughening agent, 3% of composite crosslinking film forming agent, 3% of composite reinforcing steel bar rust inhibitor, 3% of composite flame retardant, 0.5% of rheology modifier, 0.2% of reinforcing impervious agent and 0.3% of sagging resistant agent.
The novel environment-friendly cementing material is prepared from blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone in the weight ratio of 8:2:3:2:2:3 by calcining at 1000 ℃ for 1h, and then drying and grinding until the specific surface area is more than 800m <2 >/kg. The toughening agent consists of ethylene-vinyl acetate rubber powder, polyvinyl alcohol rubber powder and PP fibers in a weight ratio of 5:1:1. The inorganic reinforcing material is double fly powder. The composite crosslinking film forming agent consists of modified bentonite, borax and silicate in the weight ratio of 1:0.5:2. The composite steel bar rust inhibitor consists of phosphate, polyhydroxy compound or metal salt thereof and sodium dodecyl sulfate in the weight ratio of 5:5:1. The composite flame retardant consists of aluminum hydroxide and antimony trioxide in a weight ratio of 1:1. The rheology modifier is a polycarboxylate water reducer. The anti-permeability agent is calcium stearate. The anti-sagging agent is hydroxypropyl methylcellulose and hydroxypropyl starch ether.
The novel environment-friendly cementing material, the inorganic reinforcing filler, the toughening agent, the composite crosslinking film forming agent, the composite reinforcing steel bar rust inhibitor, the composite flame retardant, the rheology modifier, the reinforcing impervious agent and the sagging resistant agent are mixed in a dry mixer for 10 minutes, and then packaged by a packaging machine to obtain the environment-friendly inorganic flexible composite material.
Comparative example 1
The toughening agent in the embodiment 3 is replaced by ethylene-vinyl acetate rubber powder, so that the green environment-friendly inorganic flexible composite material is obtained.
Comparative example 2
The toughening agent in the embodiment 3 is replaced by polyvinyl alcohol rubber powder, so that the green environment-friendly inorganic flexible composite material is obtained.
The performance parameters of the green inorganic flexible composites of examples 1-6 and comparative examples 1-3 are shown in Table 1.
TABLE 1 Performance parameters of green Environment-friendly inorganic Flexible composite materials of examples 1-5 and comparative examples 1-2
As can be seen from the results of Table 1, the green and environment-friendly inorganic flexible composite materials obtained in examples 1 to 6 were superior in performance to those obtained in comparative examples 1 to 3. Comparative examples 1 and 2 show that the increase of the proportion of the rubber powder in the toughening agent is more beneficial to enhancing the mechanical property of the green environment-friendly inorganic flexible composite material. Compared with the examples 3-5, the novel environment-friendly cementing material in the examples 1-2 has more proportion, so that the novel environment-friendly cementing material has higher compressive strength, but the bonding strength of the novel environment-friendly cementing material is reduced due to the larger proportion of the novel environment-friendly cementing material relative to the toughening agent and the composite crosslinking film forming agent. By comparing the example 3 with the comparative examples 1 and 2, it can be seen that the invention can obviously improve the elongation at break of the green environment-friendly inorganic flexible composite material by using the toughening agent compounded by ethylene-vinyl acetate rubber powder, polyvinyl alcohol rubber powder and PP fiber compared with the environment-friendly inorganic flexible composite material by using only single rubber powder.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The environment-friendly inorganic flexible composite material is characterized by comprising the following components in percentage by weight:
40% -75% of novel environment-friendly cementing material, 10% -45% of inorganic reinforcing filler, 3% -10% of toughening agent, 3% -8% of composite crosslinking film forming agent, 3% -6% of composite reinforcing steel bar rust inhibitor, 0.3% -3% of composite flame retardant, 0.1% -0.5% of rheology modifier, 0.01% -0.2% of reinforcing impervious agent and 0.01% -0.3% of sagging resistant agent;
The novel environment-friendly cementing material is obtained by calcining blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone in a weight ratio of 8:2:3:2:2:3 at a high temperature of 800-1000 ℃ for 1h, drying and grinding;
the toughening agent consists of ethylene-vinyl acetate rubber powder, polyvinyl alcohol rubber powder and PP fibers in a weight ratio of 1-5:1:1;
The composite crosslinking film forming agent consists of modified bentonite, borax and silicate in a weight ratio of 0.9-1.1:0.5:2;
The inorganic reinforcing material comprises one or more of silica fume, talcum powder, silicon dioxide powder, double fly powder, titanium pigment and calcium carbonate powder;
The enhanced barrier agent comprises one or more of an organosilicon defoamer and calcium stearate.
2. The environment-friendly inorganic flexible composite material according to claim 1, wherein the novel environment-friendly cementing material is obtained by calcining, drying and grinding the raw materials at a high temperature until the specific surface area is more than 800m < 2 >/kg, wherein the weight ratio of the raw materials is (8:2:3:2:2:3) of blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone.
3. The green environment-friendly inorganic flexible composite material according to claim 1, wherein the composite steel bar rust inhibitor consists of phosphate, polyhydroxy compound or metal salt thereof and sodium dodecyl sulfate in a weight ratio of 4.5-5.5:5:1; the composite flame retardant consists of aluminum hydroxide and antimony trioxide in a weight ratio of 1:1-3.
4. The green environmentally friendly inorganic flexible composite material according to claim 1, wherein the rheology modifier comprises one or more of a polycarboxylate water reducer, a naphthalene water reducer, and an aliphatic water reducer.
5. The green environmental-friendly inorganic flexible composite material according to claim 1, wherein the sagging resistant agent comprises two or more of hydroxypropyl methylcellulose, hydroxypropyl starch ether, polyvinylpyrrolidone, sodium polyacrylate, and polyacrylamide.
6. A method for preparing the green environmental-friendly inorganic flexible composite material according to any one of claims 1 to 5, comprising the following steps:
Calcining the blast furnace water quenching slag, coal gangue, desulfurized gypsum powder, red mud, fly ash and limestone in a weight ratio of 8:2:3:2:2:3 at high temperature, and drying and grinding to obtain a novel environment-friendly cementing material;
The novel environment-friendly cementing material, the inorganic reinforcing filler, the toughening agent, the composite crosslinking film forming agent, the composite reinforcing steel bar rust inhibitor, the composite flame retardant, the rheology modifier, the reinforcing impervious agent and the sagging resistant agent are mixed in a dry mixer and then packaged by a packaging machine to obtain the environment-friendly inorganic flexible composite material.
7. A method of using the green environmental-friendly inorganic flexible composite material according to any one of claims 1 to 5, comprising the steps of:
after the green environment-friendly inorganic flexible composite material according to any one of claims 1-5 is transported to the site, the composite material is put into a spraying pump truck of an integrated stirring spraying machine after opening a bag, and is mixed with water to be used for spraying a roadway.
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