CN107867814B - Elastic concrete - Google Patents
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- CN107867814B CN107867814B CN201711261538.8A CN201711261538A CN107867814B CN 107867814 B CN107867814 B CN 107867814B CN 201711261538 A CN201711261538 A CN 201711261538A CN 107867814 B CN107867814 B CN 107867814B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Engineering & Computer Science (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention belongs to the technical field of new materials, and discloses elastic concrete which is prepared from the following raw materials in parts by weight: 30-40 parts of cement, 10-20 parts of slag powder, 40-80 parts of rubber particles, 1-3 parts of composite fibers, 0.01-0.05 part of polyoxyethylene sorbitan monostearate, 30-60 parts of emulsified asphalt, 10-30 parts of water-based epoxy resin, 0.5-2 parts of polycarboxylic acid water reducing agent, 0.01-0.05 part of defoaming agent, 1-2 parts of calcium metaaluminate, 3-8 parts of modified zeolite powder, 50-60 parts of sand and 10-30 parts of water. The elastic concrete is compounded by organic and inorganic materials, has low price, large elasticity, good flexibility and good anti-freezing performance, can be used for outdoor engineering, can effectively absorb impact force caused by sports, improves the comfort level during sports, relieves the impact force injury on the body, has low coefficient of heat conductivity of rubber particles and large flexibility, can prevent freeze-thaw damage of outdoor sports fields, and prolongs the service life of the fields.
Description
Technical Field
The invention belongs to the technical field of new materials, and particularly relates to elastic concrete.
Technical Field
With the development of urban construction and the improvement of living standard of people, people expect that the ground of leisure, fitness and entertainment activity places such as sports grounds, exhibition halls and the like has certain elasticity and noise reduction functions. At present, plastic runways are paved on some sports grounds, the main component is polyurethane material, and the manufacturing cost is high.
Meanwhile, with the rapid development of the automobile industry, the production and accumulation of a large amount of waste rubber tires has constituted a serious "black pollution". The waste rubber materials are processed and mixed into the concrete, so that the problem of environmental pollution caused by waste rubber can be solved, the characteristic that rubber powder has elasticity can be well utilized, and the concrete with good elasticity can be prepared. Chinese patent 'special concrete with waste rubber particles and steel slag particles as aggregates' (application No. CN200910087111.X) discloses special concrete with waste rubber particles and steel slag particles as aggregates, which comprises cement, a water reducing agent, a mineral admixture, sand, steel slag particles, rubber particles and water, and the components are proportioned according to parts by weight: 100 parts of cement, 0.1-3 parts of a water reducing agent, 0-50 parts of a mineral admixture, 0-600 parts of sand, 200-400 parts of steel slag particles, 15-50 parts of rubber particles and 20-80 parts of water. According to the invention, two wastes, namely waste rubber particles and steel slag, are added into the concrete at the same time, so that a large amount of wastes can be utilized, the natural environment is improved, the expansion stress of free calcium oxide in the steel slag is absorbed by using the elastic characteristic of the waste rubber particles, the steel slag can be utilized without special treatment, and the overall volume stability of the material is good; and because the waste rubber particles are added, the elasticity of the concrete is higher than that of common concrete, but the rubber particles prepared by the method are fewer, the elasticity is limited, the compatibility of the rubber particles and inorganic materials such as cement is poor, the caking property is low, and the strength, the impermeability and the compactness of the concrete are influenced.
Disclosure of Invention
The invention aims at the problems and provides the elastic concrete which has the advantages of low manufacturing cost, good deformation characteristic and the like. In order to achieve the purpose, the invention adopts the following technical scheme that the elastic concrete is composed of the following raw materials in parts by weight: 30-40 parts of cement, 10-20 parts of slag powder, 40-80 parts of rubber particles, 1-3 parts of composite fibers, 0.01-0.05 part of polyoxyethylene sorbitan monostearate, 30-60 parts of emulsified asphalt, 10-30 parts of water-based epoxy resin, 0.5-2 parts of polycarboxylic acid water reducing agent, 0.01-0.05 part of defoaming agent, 1-2 parts of calcium metaaluminate, 3-8 parts of modified zeolite powder, 50-60 parts of sand and 10-30 parts of water.
The cement is P.O 42.5 cement.
The specific surface area of the slag powder is not less than 400m2The activity of the catalyst per kg and 28d is not less than 75 percent.
The particle size of the rubber particles is between 20 and 60 meshes.
Preferably, the rubber particles are polysulfide rubber particles.
The composite fiber is formed by compounding two or more of sepiolite powder, wollastonite powder, polyvinyl alcohol fiber, polypropylene fiber, polyacrylonitrile fiber and polyurethane fiber.
Preferably, the composite fiber is formed by compounding wollastonite powder and polyvinyl alcohol fiber.
Preferably, the diameter of the wollastonite powder fiber and the sepiolite powder fiber is between 0.1 and 1um, and the length of the wollastonite powder fiber and the sepiolite powder fiber is between 10 and 20 um; the diameters of the polypropylene fiber, the polyvinyl alcohol fiber, the polyacrylonitrile fiber and the polyurethane fiber are between 10 and 30um, and the lengths of the polypropylene fiber, the polyvinyl alcohol fiber, the polyacrylonitrile fiber and the polyurethane fiber are between 5 and 15 mm.
Preferably, the polyoxyethylene sorbitan monostearate is polyoxyethylene (60) sorbitan monostearate, and the molecular formula is: c64H126O26。
The emulsified asphalt is cation emulsified asphalt with solid content not less than 50%.
The water-based epoxy resin is a non-ionic curing agent self-emulsifying type.
The defoaming agent is one of tributyl phosphate, polyoxyethylene polyoxypropylene pentaerythritol ether and isomeric dodecyl alcohol polyoxyethylene ether.
Preferably, the defoaming agent is isomeric dodecyl alcohol polyoxyethylene ether.
The modified zeolite powder is obtained by mixing zeolite and n-butyl glycidyl ether according to the weight ratio of 50-200:1 and then grinding together.
Preferably, the specific surface area of the modified zeolite powder is not less than 500m2/kg。
The water is tap water.
The cement and the slag powder can generate hydration reaction to generate certain strength, can also provide a carrier for emulsion breaking and film forming of emulsified asphalt and aqueous epoxy resin emulsion, and can also be used for connecting the demulsified asphalt and the epoxy resin to prevent the layering of the emulsified asphalt due to polarity difference in the demulsification and aqueous epoxy resin curing processes. The asphalt and the epoxy resin wrapped partial cement and slag powder particles do not participate in hydration reaction, and when the asphalt and the epoxy resin are damaged, the asphalt and the epoxy resin can carry out hydration reaction after encountering external moisture, so that a certain self-healing effect is achieved. The aqueous epoxy resin and the thiol group at the tail end of the polysulfide rubber are reacted and tightly combined, and a flexible chain segment is introduced into the epoxy resin molecule to increase the plastic deformation capacity of the matrix. The wollastonite powder and the sepiolite powder have shorter fiber size, are uniformly dispersed in a system, make surrounding structural tissues more compact and improve the structural toughness. The polypropylene fiber, the polyacrylonitrile fiber and the polyurethane fiber have longer sizes and better flexibility, can be connected with a dispersed phase and a continuous phase of an organic-inorganic composite material in elastic concrete, and play a role in bridging when the elastic concrete is subjected to strain, thereby preventing the concrete from being damaged. The polyoxyethylene sorbitan monostearate can eliminate the static electricity of the organic fibers in the invention, and improve the flexibility of the organic fibers, so that the organic fibers can be better dispersed in the concrete stirring processing process. The water reducing agent can reduce the water consumption of the system under the condition of ensuring the same working performance; the defoaming agent can reduce the amount of bubbles, improve the compactness of a system and reduce macroscopic defects. The n-butyl glycidyl ether in the modified zeolite powder can promote the curing of the epoxy resin, and the zeolite can generate hydration reaction with cement; proper amount of calcium metaaluminate can accelerate the hydration speed of cement, and when the hydration of the cement is accelerated, a large amount of water is consumed to accelerate the demulsification speed of emulsified asphalt so as to coordinate with the curing speed of epoxy resin. In addition, the sodium metaaluminate can also adjust the pH value of the system and improve the stability of the system. The invention coordinates and unifies the curing reaction of the waterborne epoxy resin, the hydration reaction of the cement and the cementation of the asphalt through the synergistic action of various substances to form a stable structure.
The invention has the following beneficial effects:
compared with the prior art, the elastic concrete provided by the invention has the following advantages: the impact force that can the active absorption motion brought, the comfort level when improving the motion alleviates the impact force injury that the health received, and rubber granule thermal conductivity is low, and is flexible big, and the intensity of concrete is high simultaneously, impermeability and closely knit nature are good, can prevent the freeze thawing destruction in outdoor sport place, improve the life in place.
Detailed Description
The following is a detailed description of embodiments of the invention, but the invention can be implemented in many different ways, as defined and covered by the claims. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The elastic concrete is composed of the following raw materials in parts by weight: 30 parts of cement, 20 parts of slag powder, 40 parts of rubber particles, 3 parts of composite fibers, 0.01 part of polyoxyethylene sorbitan monostearate, 60 parts of emulsified asphalt, 10 parts of water-based epoxy resin, 2 parts of polycarboxylic acid water reducing agent, 0.01 part of defoaming agent, 2 parts of calcium metaaluminate, 3 parts of modified zeolite powder, 60 parts of sand and 10 parts of water.
The cement is P.O 42.5 cement.
The specific surface area of the slag powder is not less than 400m2/kg, and the activity of 28d is not less than 75%.
The particle size of the rubber particles is between 20 and 30 meshes.
The composite fiber is compounded by sepiolite powder, wollastonite powder, polyvinyl alcohol fiber, polypropylene fiber, polyacrylonitrile fiber and polyurethane fiber.
The emulsified asphalt is cation emulsified asphalt with solid content not less than 50%.
The water-based epoxy resin is a non-ionic curing agent self-emulsifying type.
The defoaming agent is tributyl phosphate.
The modified zeolite powder is obtained by mixing zeolite and n-butyl glycidyl ether according to the weight ratio of 50:1 and then grinding together.
Example 2
The elastic concrete is composed of the following raw materials in parts by weight: 40 parts of cement, 10 parts of slag powder, 80 parts of rubber particles, 1 part of composite fiber, 0.05 part of polyoxyethylene sorbitan monostearate, 30 parts of emulsified asphalt, 30 parts of water-based epoxy resin, 0.5 part of polycarboxylic acid water reducer, 0.05 part of defoaming agent, 1 part of calcium metaaluminate, 8 parts of modified zeolite powder, 50 parts of sand and 20 parts of water.
The rubber particles are polysulfide rubber particles with the particle size of 20-60 meshes.
The composite fiber is compounded by sepiolite powder, polypropylene fiber and polyacrylonitrile fiber.
The polyoxyethylene sorbitan monostearate is polyoxyethylene (60) sorbitan monostearate, and the molecular formula is as follows: c64H126O26。
The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.
The modified zeolite powder is obtained by mixing zeolite and n-butyl glycidyl ether according to the weight ratio of 200:1 and then grinding together.
Example 3
The elastic concrete is composed of the following raw materials in parts by weight: 32 parts of cement, 17 parts of slag powder, 63 parts of rubber particles, 2 parts of composite fibers, 0.02 part of polyoxyethylene sorbitan monostearate, 50 parts of emulsified asphalt, 15 parts of water-based epoxy resin, 1.5 parts of polycarboxylic acid water reducing agent, 0.04 part of defoaming agent, 1.3 parts of calcium metaaluminate, 7 parts of modified zeolite powder, 54 parts of sand and 15 parts of water.
The cement is P.O 42.5 cement.
The specific surface area of the slag powder is not less than 400m2/kg, and the activity of 28d is not less than 75%.
The rubber particles are polysulfide rubber particles, and the particle size is 30-40 meshes.
The composite fiber is formed by compounding wollastonite powder and polyvinyl alcohol fiber, wherein the diameter of the wollastonite powder fiber is 0.1-1um, and the length of the wollastonite powder fiber is 10-20 um; the fiber diameter of the polyvinyl alcohol fiber is between 10 and 30um, and the length of the polyvinyl alcohol fiber is between 5 and 15 mm.
The polyoxyethylene sorbitan monostearate is polyoxyethylene (60) sorbitan monostearate, and the molecular formula is as follows: c64H126O26。
The defoaming agent is isomeric dodecyl alcohol polyoxyethylene ether.
The modified zeolite powder is prepared by mixing zeolite and n-butyl glycidyl ether according to a weight ratio of 80:1, and then grinding together until the specific surface area is more than 500m2Obtained in kg.
Example 4
The elastic concrete is composed of the following raw materials in parts by weight: 33 parts of cement, 15 parts of slag powder, 44 parts of rubber particles, 2 parts of composite fiber, 0.03 part of polyoxyethylene sorbitan monostearate, 45 parts of emulsified asphalt, 20 parts of water-based epoxy resin, 1.5 parts of polycarboxylic acid water reducing agent, 0.04 part of defoaming agent, 1.3 parts of calcium metaaluminate, 6 parts of modified zeolite powder, 54 parts of sand and 30 parts of water.
The particle size of the rubber particles is between 30 and 60 meshes.
The composite fiber is formed by compounding wollastonite powder and polyvinyl alcohol fiber polyurethane fiber.
The emulsified asphalt is cation emulsified asphalt with solid content not less than 50%.
The water-based epoxy resin is a non-ionic curing agent self-emulsifying type.
The defoaming agent is tributyl phosphate.
The modified zeolite powder is obtained by mixing zeolite and n-butyl glycidyl ether according to the weight ratio of 60:1 and then grinding together.
Example 5
The elastic concrete is composed of the following raw materials in parts by weight: 31 parts of cement, 18 parts of slag powder, 52 parts of rubber particles, 1.8 parts of composite fiber, 0.02 part of polyoxyethylene sorbitan monostearate, 45 parts of emulsified asphalt, 24 parts of waterborne epoxy resin, 1.4 parts of polycarboxylic acid water reducing agent, 0.03 part of defoaming agent, 1.2 parts of calcium metaaluminate, 6 parts of modified zeolite powder, 55 parts of sand and 25 parts of water.
Comparative example 1
The elastic concrete is composed of the following raw materials in parts by weight: 32 parts of cement, 17 parts of slag powder, 53 parts of rubber particles, 50 parts of emulsified asphalt, 15 parts of waterborne epoxy resin, 1.5 parts of polycarboxylic acid water reducing agent, 0.04 part of defoaming agent, 1.3 parts of calcium metaaluminate, 7 parts of modified zeolite powder, 54 parts of sand and 15 parts of water.
The cement is P.O 42.5 cement.
The specific surface area of the slag powder is not less than 400m2/kg, and the activity of 28d is not less than 75%.
The rubber particles are polysulfide rubber particles, and the particle size is between 20 and 60 meshes.
The defoaming agent is isomeric dodecyl alcohol polyoxyethylene ether.
The modified zeolite powder is prepared by mixing zeolite and n-butyl glycidyl ether according to a weight ratio of 80:1, and then grinding together until the specific surface area is more than 500m2Obtained in kg.
Comparative example 2
The elastic concrete is composed of the following raw materials in parts by weight: 32 parts of cement, 17 parts of slag powder, 53 parts of rubber particles, 2 parts of composite fibers, 0.02 part of polyoxyethylene sorbitan monostearate, 50 parts of emulsified asphalt, 15 parts of water-based epoxy resin, 1.5 parts of polycarboxylic acid water reducing agent, 0.04 part of defoaming agent, 7 parts of modified zeolite powder, 54 parts of sand and 15 parts of water.
The cement is P.O 42.5 cement.
The specific surface area of the slag powder is not less than 400m2/kg, and the activity of 28d is not less than 75%.
The rubber particles are polysulfide rubber particles, and the particle size is between 20 and 60 meshes.
The composite fiber is formed by compounding wollastonite powder and polyvinyl alcohol fiber, wherein the diameter of the wollastonite powder fiber is 0.1-1um, and the length of the wollastonite powder fiber is 10-20 um; the fiber diameter of the polyvinyl alcohol fiber is between 10 and 30um, and the length of the polyvinyl alcohol fiber is between 5 and 15 mm.
The polyoxyethylene sorbitan monostearate is polyoxyethylene (60) sorbitan monostearate, and the molecular formula is as follows: c64H126O26。
The defoaming agent is isomeric dodecyl alcohol polyoxyethylene ether.
The modified zeolite powder is prepared by mixing zeolite and n-butyl glycidyl ether according to a weight ratio of 80:1, and then grinding together until the specific surface area is more than 500m2Obtained in kg.
Comparative example 3
The elastic concrete is composed of the following raw materials in parts by weight: 32 parts of cement, 17 parts of slag powder, 53 parts of rubber particles, 2 parts of composite fibers, 0.02 part of polyoxyethylene sorbitan monostearate, 50 parts of emulsified asphalt, 15 parts of water-based epoxy resin, 1.5 parts of polycarboxylic acid water reducing agent, 0.04 part of defoaming agent, 1.3 parts of calcium metaaluminate, 54 parts of sand and 15 parts of water.
The cement is P.O 42.5 cement.
The specific surface area of the slag powder is not less than 400m2/kg, and the activity of 28d is not less than 75%.
The rubber particles are polysulfide rubber particles, and the particle size is between 20 and 60 meshes.
The composite fiber is formed by compounding wollastonite powder and polyvinyl alcohol fiber, wherein the diameter of the wollastonite powder fiber is 0.1-1um, and the length of the wollastonite powder fiber is 10-20 um; the fiber diameter of the polyvinyl alcohol fiber is between 10 and 30um, and the length of the polyvinyl alcohol fiber is between 5 and 15 mm.
The polyoxyethylene sorbitan monostearate is polyoxyethylene (60) sorbitan monostearate, and the molecular formula is as follows: c64H126O26。
The defoaming agent is isomeric dodecyl alcohol polyoxyethylene ether.
Performance testing
The elastic concretes obtained in examples 1 to 5 and comparative examples 1 to 3 were tested for 28d axial compressive strength and compressive modulus of elasticity, respectively. The results are shown in Table 1 below.
TABLE 1 test results
| Serial number | Axial compressive strength/MPa | Modulus of elasticity under compression/GPa |
| Example 1 | 20.1 | 13.7 |
| Example 2 | 17.8 | 10.1 |
| Example 3 | 23.2 | 11.4 |
| Example 4 | 22.1 | 12.9 |
| Example 5 | 24.6 | 11.8 |
| Comparative example 1 | 18.2 | 12.4 |
| Comparative example 2 | 20.1 | 12.1 |
| Comparative example 3 | 19.5 | 13.5 |
The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The elastic concrete is composed of the following raw materials in parts by weight: 30-40 parts of cement, 10-20 parts of slag powder, 40-80 parts of rubber particles, 1-3 parts of composite fibers, 0.01-0.05 part of polyoxyethylene sorbitan monostearate, 30-60 parts of emulsified asphalt, 10-30 parts of water-based epoxy resin, 0.5-2 parts of polycarboxylic acid water reducing agent, 0.01-0.05 part of defoaming agent, 1-2 parts of calcium metaaluminate, 3-8 parts of modified zeolite powder, 50-60 parts of sand and 10-30 parts of water; the rubber particles are polysulfide rubber particles; the composite fiber is formed by compounding two or more of sepiolite powder, wollastonite powder, polyvinyl alcohol fiber, polypropylene fiber, polyacrylonitrile fiber and polyurethane fiber; the modified zeolite powder is obtained by mixing zeolite and n-butyl glycidyl ether according to the weight ratio of 50-200:1 and then grinding together.
2. The elastic concrete according to claim 1, wherein the rubber particles have a particle size of between 20 and 60 mesh.
3. The elastic concrete according to claim 1, wherein the composite fibers are compounded from wollastonite powder and polyvinyl alcohol fibers.
4. Root of herbaceous plantThe elastic concrete according to claim 1, wherein the polyoxyethylene sorbitan monostearate is polyoxyethylene (60) sorbitan monostearate of the formula: c64H126O26。
5. The elastic concrete according to claim 1, wherein the defoaming agent is one of tributyl phosphate, polyoxyethylene polyoxypropylene pentaerythritol ether and isomeric dodecyl polyoxyethylene ether.
6. The elastic concrete according to claim 5, wherein the defoamer is isomeric tridecyl alcohol polyoxyethylene ether.
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| CN108424057B (en) * | 2018-05-22 | 2020-12-15 | 珠海市振业混凝土有限公司 | Compression-resistant, waterproof and fireproof cement-based composite material and preparation method thereof |
| CN108484060A (en) * | 2018-07-06 | 2018-09-04 | 佛山市高明区爪和新材料科技有限公司 | A kind of freeze proof rubber concrete |
| CN109081642B8 (en) * | 2018-09-17 | 2022-03-22 | 中山市粤华混凝土有限公司 | Epoxy resin-based concrete for building and preparation process thereof |
| CN109265696B (en) * | 2018-09-27 | 2021-08-20 | 佛山一宇卫士陶瓷材料有限公司 | Preparation method of ceramic water reducing agent |
| CN111792887A (en) * | 2020-07-27 | 2020-10-20 | 中铁十四局集团有限公司 | Anti-seismic synchronous grouting material |
| CN112358252A (en) * | 2020-11-11 | 2021-02-12 | 广州市广丰混凝土有限公司 | Anti-freezing cracking concrete and preparation method thereof |
| CN112592133A (en) * | 2020-12-24 | 2021-04-02 | 泰安市同达建材有限公司 | Flexible early-strength concrete and preparation method thereof |
| CN114988775B (en) * | 2022-06-21 | 2023-07-14 | 浙江方远新材料股份有限公司 | Self-repairing high-performance concrete |
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