CN111362646A - Low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and preparation method thereof - Google Patents
Low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and preparation method thereof Download PDFInfo
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- CN111362646A CN111362646A CN201811599548.7A CN201811599548A CN111362646A CN 111362646 A CN111362646 A CN 111362646A CN 201811599548 A CN201811599548 A CN 201811599548A CN 111362646 A CN111362646 A CN 111362646A
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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
- C04B28/06—Aluminous 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/50—Flexible or elastic materials
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and a preparation method thereof. The low-elastic-modulus flexible ultrahigh-toughness mortar concrete system consists of aluminate cement, rubber powder, aggregate, a powder defoamer, a thickening agent, a coagulation regulator, a high-efficiency water reducing agent, an anti-cracking shrinkage-reducing agent, water and fibers, and can realize the adjustment of the characteristics of early strength, multi-crack cracking, rigidity and flexibility, noise reduction and energy absorption and the like through the optimization of all components, so that the obtained low-elastic-modulus flexible ultrahigh-toughness mortar concrete system can meet the requirements of conventional building engineering, roads and military engineering on toughening, anti-cracking, anti-collision and energy absorption and the like.
Description
Technical Field
The invention relates to the field of fiber reinforced mortar concrete, in particular to a low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and a preparation method thereof.
Background
The rapid construction of engineering and the emergency repair and recovery of engineering facilities are important guarantees for improving efficiency and ensuring engineering safety, and the rapid repair material is the key for realizing the emergency repair and emergency construction, and simultaneously has the characteristics of rapid opening, high-efficiency construction, high toughness, strong bonding and low shrinkage. In addition, part of the building structure should have the functions of collision prevention and energy absorption on the premise of toughness. The low elastic modulus flexible super-high toughness concrete has excellent performances of strain hardening property, excellent crack control capability, excellent freeze thawing resistance and the like, and has wide application prospect in the new construction and repair of bridge engineering, road pavement engineering, underground engineering, anti-seismic structures, impact resistance and anti-collision energy-absorbing structures.
Currently, common rapid repair materials include: ordinary cement concrete and mortar, rapid hardening portland cement, special cement (high alumina, sulphoaluminate, magnesium phosphate and the like), polymer concrete, ultra-high toughness fiber reinforced cement-based composite materials and the like. The 1h compressive strength of the rapid hardening portland cement can reach 10-30 MPa, the 1d strength can reach 75% -90% of the 28d strength, but the defects of large drying shrinkage, poor interface bonding and the like still exist. The 1d compressive strength of the rapid-hardening early-strength high-alumina cement reaches 25-45 MPa, but the later strength has a relatively obvious phenomenon of shrinkage. The magnesium phosphate cement has the excellent performances of quick setting, quick hardening, high early strength, high bonding strength, small drying shrinkage deformation and the like, but the setting and hardening speed is too high, and an effective setting time adjusting measure is lacked. The polymer or polymer modified concrete can effectively improve the interface adhesive property, the fracture toughness property, the deformation property and the like, but the compatibility with the base material is poor. The conventional repairing material also has the problems of large elastic modulus and insufficient flexibility, and the application of the conventional repairing material in structures such as anti-collision energy absorption and the like is limited.
The compressive strength of the existing 28-day-old ultra-high-toughness concrete is at the level of 20-50MPa, and the elastic modulus is 35-50 GPa. Along with the increase of age and strength, the elastic modulus slowly increases and gradually stabilizes, the ultimate tensile strain of the ultra-high toughness concrete gradually decreases, and in order to realize and maintain the ultra-high toughness, a series of requirements are provided for the fiber which is one of the key components from two aspects of fiber body and fiber-matrix interface bonding performance.
The patent CN201110271280.6 is a low elastic modulus high-performance concrete, which aims to solve the problem of difficult deformation caused by too high elastic modulus of base plate concrete of the existing high-speed railway II-type plate ballastless track. The low-elastic modulus high-performance concrete is prepared from the following raw materials in parts by weight: 240 parts of P.042.5 cement, 100 parts of I-grade fly ash, 120 parts of S95 slag powder, 900 parts of medium sand 850, 1050 parts of 10-20mm single-particle-grade gravel, 152 parts of water 148 and 3.3-3.5 parts of polycarboxylic acid water reducing agent. The requirement of reducing the elastic modulus is realized by adopting larger crushed stone void ratio and improving the concrete sand ratio, the reduction of the concrete strength is compensated by using larger using amount of cementing materials, the index requirement of high-performance concrete is met, and the high-performance concrete can be widely applied to special structures with higher buffering requirements like high-speed railway base plates and the like.
Aiming at the problems of high mold matching quantity, insufficient toughness or strain and the like of the current application field of the ultra-high toughness concrete material part and the lack of special engineering fibers for matching the requirements of the ultra-high toughness concrete material on the fibers, the invention mainly develops the ultra-high toughness mortar concrete which has the performance characteristics of high strength, low elasticity, low shrinkage, excellent flexibility, capability of meeting various construction modes and the like.
Disclosure of Invention
In order to solve the problems of low early strength, mismatching between elastic modulus and toughness, insufficient flexibility and the like of the existing ultra-high toughness concrete, the invention develops the ultra-high toughness mortar concrete which has the performance characteristics of high strength, low elastic modulus, low shrinkage, excellent flexibility, capability of meeting various construction modes and the like.
The invention provides a low-elastic-modulus flexible ultrahigh-toughness mortar concrete system which comprises mortar concrete and fibers, wherein the mixing amount of the fibers in each cubic mortar concrete is 10-40 kg/m3；
The mortar concrete comprises the following components in percentage by mass:
the water-cement ratio in the mortar concrete is 0.25-0.40;
the particle size or equivalent particle size of the rubber powder is 20-500 meshes, and the appearance of the particles can be spherical or irregular; the rubber powder functions to provide an elastic or low modulus component, giving the system of the invention good elasticity and low modulus.
The particle size or equivalent particle size of the rubber powder is preferably 200-300 meshes, the particle shape is preferably irregular, and the continuity of the particle size meets normal distribution.
The surface of the rubber powder can be directly used without treatment, and the rubber powder treated by the activated surface modifier is preferred.
The rubber powder is selected from one or more of natural rubber, butadiene rubber, styrene butadiene rubber and butyl rubber, and is mixed and used in any proportion.
The diameter range of the fiber is 30-300 micrometers, the length of the fiber is 3-15 millimeters, and the length of the fiber is 10-500 times of the particle size of the rubber powder or the equivalent particle size; when the diameter of the fiber is 30-100 micrometers, the tensile strength of the corresponding fiber needs to be more than 1400MPa, and the elastic modulus needs to be in a range of 22-45 GPa; when the diameter of the fiber is more than 100 and not more than 300 micrometers, the tensile strength of the corresponding fiber needs to be more than 900MPa, and the elastic modulus needs to be in a range of 15-25 GPa;
the fiber is polyvinyl alcohol fiber or polyoxymethylene fiber;
the fiber is prepared by mixing at least two kinds of fibers of the same type with different specifications or alternatively mixing at least two kinds of fibers of different specifications for use, and the mass proportion of the fibers with the diameter of 30-100 micrometers is not less than 60% of the total mixing amount of the fibers.
The particle size of the aggregate is 0.2 mm-10 mm, and the aggregate meets the continuous grading of particles;
the powder defoaming agent is a polyether defoaming agent or an organic silicon defoaming agent;
the thickening agent is cellulose ether, and the main function of the thickening agent is to reduce bleeding of the system and promote dispersion of fibers;
the coagulation regulator is borax or borate, and is mainly used for controlling the coagulation behavior of aluminate and ensuring the fluidity of the aluminate;
the high-efficiency water reducing agent is a polycarboxylic acid water reducing agent, can be liquid or powder, preferably powder, and has a water reducing rate of not less than 40%;
the anti-cracking shrinkage-reducing agent is a calcium oxide expanding agent.
The preparation method of the low-elastic-modulus flexible ultrahigh-toughness mortar concrete system comprises the following steps:
(1) the dry mixture mixing preparation process comprises the following steps: weighing aluminate cement, rubber powder, aggregate, a powder defoamer, a thickening agent regulator, a high-efficiency water reducing agent and an anti-cracking shrinkage-reducing agent, adding the components into a full-automatic mortar stirring system, and stirring the components at a low speed for 60 to 240 seconds and then at a high speed for 30 to 180 seconds; the frequency of the fast and slow speed stirrer is 40-60r/min and 20-30r/min respectively, and the formed dry mixture is subjected to damp-proof sealing and packaging for later use by an automatic packaging machine;
(2) preparing a low-elastic-modulus flexible ultrahigh-toughness mortar concrete system: firstly, pouring the dry mixture prepared in the step (1) into a stirrer, and mixing for 30-60 seconds; then adding water in proportion, and stirring for 1-4min until the mortar is in a good and uniform state; finally, adding the metered fibers into a stirrer, and stirring until the fibers are uniformly dispersed.
The low-elastic-modulus flexible ultrahigh-toughness mortar concrete system can adopt construction modes such as pouring, spraying or smearing.
The invention has the following advantages:
(1) from the perspective of material composition design, the flow characteristics of each stage during mixing, forming and construction are comprehensively considered, so that the flow characteristics meet the process parameters of each stage;
(2) when the modulus of the system is higher, the flexibility of the ultra-high toughness material system can be weakened, the application of the rubber powder meeting the grading requirement is realized, and the effect of combining hardness and softness is realized;
(3) the rubber powder which is subjected to surface modification and meets the grading requirement is preferably selected, so that the binding force of the rubber powder and components such as rubber materials and the like and the densification of the system can be effectively realized, and the flexibility of the ultrahigh-toughness mortar concrete system is improved by fully exerting the deformation capacity of the rubber powder body;
(4) the anti-cracking shrinkage-reducing agent can generate the coagulation accelerating effect on the low-elastic-modulus flexible ultrahigh-toughness mortar concrete system, the invention not only ensures the normal exertion of the anti-cracking shrinkage-reducing agent effect, but also effectively adjusts the setting time and ensures the time window of molding and construction through the excessive coagulation adjusting agent,
(5) due to the adoption of the novel polyoxymethylene fiber, the monopoly of foreign polyvinyl alcohol fiber in the material system can be broken, the material cost is obviously reduced, and the product competitiveness is improved.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications can be made by those skilled in the art after reading the disclosure of the present invention, and such equivalents also fall within the scope of the protection of the present application.
Comparative example 1
The mortar concrete comprises the following components in percentage by mass:
aluminate cement: 45 percent of
Aggregate: 30 percent of
Silicone powder defoaming agent: 0.01 percent
Cellulose ether thickener: 0.01 percent
Borax setting regulator: 0.30 percent
Polycarboxylic acid high-efficiency water reducing agent: 0.50 percent
Calcium oxide anti-cracking shrinkage-reducing agent: 5.00 percent
The balance of water;
the mortar concrete is externally doped with fibers: polyoxymethylene fiber 40kg/m3Wherein the amount of fiber having a diameter of 30 microns and a length of 6 mm is 25kg, tensile strength: 1500MPa, elastic modulus of 30 GPa; the balance is 300 micrometers in diameter, 15 millimeters in length, tensile strength: 940MPa, and the elastic modulus is 20 GPa.
The materials are accurately metered and added into full-automatic dry powder mortar production equipment, and the materials are uniformly stirred, metered, sealed and moisture-proof and packaged for later use.
Comparative example 2
The mortar concrete comprises the following components in percentage by mass:
portland cement 42.5: 45 percent of
Aggregate: 30 percent of
Silicone powder defoaming agent: 0.01 percent
Cellulose ether thickener: 0.01 percent
Borate pour point control agent: 0.30 percent
Polycarboxylic acid high-efficiency water reducing agent: 0.50 percent
Calcium oxide anti-cracking shrinkage-reducing agent: 5.00 percent
The balance of water;
the mortar concrete is externally doped with fibers: polyoxymethylene fiber 40kg/m3Wherein the amount of fiber having a diameter of 30 microns and a length of 6 mm is 25kg, tensile strength: 1500MPa, elastic modulus of 30 GPa; the balance is 300 micrometers in diameter, 15 millimeters in length, tensile strength: 940MPa, and the elastic modulus is 20 GPa.
The materials are accurately metered and added into full-automatic dry powder mortar production equipment, and the materials are uniformly stirred, metered, sealed and moisture-proof and packaged for later use.
Example 1
The invention relates to mortar concrete, which comprises the following components in percentage by weight:
aluminate cement: 45 percent of
Natural rubber powder: 10 percent of
Aggregate: 30 percent of
Silicone powder defoaming agent: 0.01 percent
Cellulose ether thickener: 0.01 percent
Borax setting regulator: 0.30 percent
Polycarboxylic acid high-efficiency water reducing agent: 0.50 percent
Calcium oxide anti-cracking shrinkage-reducing agent: 5.00 percent
The balance of water;
the particle size of the natural rubber powder is 100 meshes, the appearance of the natural rubber powder is spherical, and the continuity of the particle size meets normal distribution; the surface of the rubber powder is not treated.
The mortar concrete is externally doped with fibers: polyoxymethylene fiber 40kg/m3Wherein the amount of fiber having a diameter of 30 microns and a length of 6 mm is 25kg, tensile strength: 1500MPa, modulus of elasticity30 GPa; the balance is 300 micrometers in diameter, 15 millimeters in length, tensile strength: 940MPa, and the elastic modulus is 20 GPa.
The materials are accurately metered and added into full-automatic dry powder mortar production equipment, and the materials are uniformly stirred, metered, sealed and moisture-proof and packaged for later use.
Example 2
The invention relates to mortar concrete, which comprises the following components in percentage by weight:
sulphoaluminate cement: 55 percent of
Butadiene rubber powder: 30 percent of
Aggregate: 15 percent of
Polyether powder defoamer: 0.06 percent
Cellulose ether thickener: 1.0 percent
Borax setting regulator: 2.00 percent
Polycarboxylic acid powder high-efficiency water reducing agent: 0.10 percent
Calcium oxide anti-cracking shrinkage-reducing agent: 10.00 percent
The balance of water;
the equivalent particle size of the butadiene rubber powder is 20 meshes, the particle appearance is irregular, and the continuity of the particle size meets normal distribution; the surface of the rubber powder is not treated.
The mortar concrete is externally doped with fibers: polyvinyl alcohol fiber 10kg/m3Diameter: 30 microns; length: 6 mm, tensile strength: 1600MPa, modulus of elasticity: 40 GPa;
the materials are accurately metered and added into full-automatic dry powder mortar production equipment, and the materials are uniformly stirred, metered, sealed and moisture-proof and packaged for later use.
Example 3
The invention relates to mortar concrete, which comprises the following components in percentage by weight:
aluminate cement: 50.00 percent
Styrene-butadiene rubber powder: 1.00 percent
Aggregate: 30.00 percent
Silicone powder defoaming agent: 0.03 percent
Cellulose ether thickener: 0.05 percent
Borate pour point control agent: 1.00 percent
Polycarboxylic acid high-efficiency water reducing agent: 0.25 percent
Calcium oxide anti-cracking shrinkage-reducing agent: 1.0 percent
The balance of water;
the equivalent particle size of the styrene-butadiene rubber powder is 500 meshes, the particle appearance is irregular, and the continuity of the particle size meets normal distribution; the surface of the rubber powder is treated by the surface modifier after being activated.
The mortar concrete is externally doped with fibers: polyvinyl alcohol fiber and polyoxymethylene fiber are 20 and 12kg/m respectively3Wherein the fiber diameter of the polyvinyl alcohol is as follows: 40 microns; length: 8 mm, tensile strength: 1540MPa, modulus of elasticity: 40 GPa; diameter of polyoxymethylene fiber: 200 microns; length: 12 mm, tensile strength: 1000MPa, modulus of elasticity: 24 GPa;
the materials are accurately metered and added into full-automatic dry powder mortar production equipment, and the materials are uniformly stirred, metered, sealed and moisture-proof and packaged for later use.
Example 4
The invention relates to mortar concrete, which comprises the following components in percentage by weight:
aluminate cement: 48.00 percent
Butyl rubber powder: 20.00 percent
Aggregate: 20.00 percent
Polyether powder defoamer: 0.02 percent
Cellulose ether thickener: 0.04 percent
Borax setting regulator: 0.80 percent
Polycarboxylic acid high-efficiency water reducing agent: 0.40 percent
Calcium oxide anti-cracking shrinkage-reducing agent: 8.00 percent
The balance of water;
the equivalent particle size of the butyl rubber powder is 150 meshes, the particle appearance is irregular, and the continuity of the particle size meets normal distribution; the surface of the rubber powder is treated by the surface modifier after being activated.
The mortar concrete is externally doped with fibers: 30kg/m polyoxymethylene fiber3Diameter: 45 microns; length: 9 mm, tensile strength: 1440MPa, modulus of elasticity: 28 GPa;
the materials are accurately metered and added into full-automatic dry powder mortar production equipment, and the materials are uniformly stirred, metered, sealed and moisture-proof and packaged for later use.
Example 5
The invention relates to mortar concrete, which comprises the following components in percentage by weight:
aluminate cement: 52.00 percent
Natural rubber powder: 15.00 percent
Aggregate: 24.00 percent
Silicone powder defoaming agent: 0.04 percent
Cellulose ether thickener: 0.08 percent
Borate pour point control agent: 1.20 percent
Polycarboxylic acid high-efficiency water reducing agent: 0.30 percent
Calcium oxide anti-cracking shrinkage-reducing agent: 6.00 percent
The balance of water;
the equivalent particle size of the natural rubber powder is 300 meshes, the appearance of the natural rubber powder is irregular, and the continuity of the particle size meets normal distribution; the surface of the rubber powder is treated by the surface modifier after being activated.
The mortar concrete is externally doped with fibers: the polyvinyl alcohol fiber and the polyoxymethylene fiber are respectively 10 and 26kg/m3Wherein the fiber diameter of the polyvinyl alcohol is as follows: 220 microns; length: 15 mm, tensile strength: 1100MPa, modulus of elasticity: 18 GPa; diameter of polyoxymethylene fiber: 36 microns; length: 3 mm, tensile strength: 1520MPa, modulus of elasticity: 36 GPa;
the materials are accurately metered and added into full-automatic dry powder mortar production equipment, and the materials are uniformly stirred, metered, sealed and moisture-proof and packaged for later use.
Selecting the materials in the comparative examples and the examples, fixing the water-cement ratio to be 0.3, preparing the low-elastic-modulus flexible ultrahigh-toughness mortar concrete, and testing the relevant properties of the materials according to the standard in the mechanical property test method (JC/T2461-2018) of the high-ductility fiber reinforced cement-based composite material, wherein the following table 1:
TABLE 1 Properties of Low-modulus-elasticity flexible ultrahigh-toughness mortar concrete
The data in the table show that the elastic modulus of the low elastic modulus flexible ultrahigh-toughness mortar concrete is greatly reduced on the premise of not influencing the performance of uniaxial tensile strain, and the mortar concrete has high early strength and embodies the advantages of the advancement and application effect of the technology.
Claims (8)
1. The utility model provides a flexible ultrahigh tenacity mortar concrete system of low elastic modulus which characterized in that: comprises mortar concrete and fibers, wherein the mixing amount of the fibers in each cubic of the mortar concrete is 10-40 kg/m3；
The mortar concrete comprises the following components in percentage by mass:
the water-cement ratio in the mortar concrete is 0.25-0.40;
the particle size or equivalent particle size of the rubber powder is 20-500 meshes, and the appearance of the particles can be spherical or irregular;
the diameter range of the fiber is 30-300 micrometers, the length of the fiber is 3-15 millimeters, and the length of the fiber is 10-500 times of the particle size of the rubber powder or the equivalent particle size; when the diameter of the fiber is 30-100 micrometers, the tensile strength of the corresponding fiber needs to be more than 1400MPa, and the elastic modulus needs to be in a range of 22-45 GPa; when the diameter of the fiber is more than 100 and not more than 300 micrometers, the tensile strength of the corresponding fiber needs to be more than 900MPa, and the elastic modulus needs to be in a range of 15-25 GPa;
the fiber is polyvinyl alcohol fiber or polyoxymethylene fiber;
the fiber is prepared by mixing at least two kinds of fibers of the same type with different specifications or alternatively mixing at least two kinds of fibers of different specifications for use, and the mass proportion of the fibers with the diameter of 30-100 micrometers is not less than 60% of the total mixing amount of the fibers.
2. The mortar concrete system as claimed in claim 1, wherein the rubber powder is selected from one or more of natural rubber, butadiene rubber, styrene butadiene rubber and butyl rubber;
the particle size of the aggregate is 0.2 mm-10 mm, and the aggregate meets the continuous grading of particles;
the powder defoaming agent is a polyether defoaming agent or an organic silicon defoaming agent;
the thickening agent is cellulose ether;
the coagulation regulator is borax or borate;
the high-efficiency water reducing agent is a polycarboxylic acid water reducing agent, is liquid or powder, and has a water reducing rate of not less than 40%;
the anti-cracking shrinkage-reducing agent is a calcium oxide expanding agent.
3. The mortar concrete system as claimed in claim 2, wherein the particle size or equivalent particle size of the rubber powder is 200-300 mesh.
4. The mortar concrete system as claimed in claim 3, wherein the rubber powder has irregular particle shape and the particle size is continuous and satisfies normal distribution.
5. The mortar concrete system of claim 2, wherein the rubber powder is a rubber powder treated with an activated surface modifier.
6. The low elastic modulus flexible ultra-high toughness mortar concrete system according to claim 2, characterized in that the high efficiency water reducing agent is powder.
7. The method of preparing a low elastic modulus flexible ultra-high toughness mortar concrete system as claimed in any one of claims 1 to 6, comprising the steps of:
(1) the dry mixture mixing preparation process comprises the following steps: weighing aluminate cement, rubber powder, aggregate, a powder defoamer, a thickening agent regulator, a high-efficiency water reducing agent and an anti-cracking shrinkage-reducing agent, adding the components into a full-automatic mortar stirring system, and stirring the components at a low speed for 60 to 240 seconds and then at a high speed for 30 to 180 seconds; the frequency of the fast and slow speed stirrer is 40-60r/min and 20-30r/min respectively, and the formed dry mixture is subjected to damp-proof sealing and packaging for later use by an automatic packaging machine;
(2) preparing a low-elastic-modulus flexible ultrahigh-toughness mortar concrete system: firstly, pouring the dry mixture prepared in the step (1) into a stirrer, and mixing for 30-60 seconds; then adding water in proportion, and stirring for 1-4min until the mortar is in a good and uniform state; finally, adding the metered fibers into a stirrer, and stirring until the fibers are uniformly dispersed.
8. The method for applying the low-elastic-modulus flexible ultrahigh-toughness mortar concrete system as claimed in any one of claims 1 to 6, wherein the low-elastic-modulus flexible ultrahigh-toughness mortar concrete system can be applied by pouring, spraying or smearing.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115819045A (en) * | 2022-12-16 | 2023-03-21 | 常州绿玛特建筑科技有限公司 | Conductive high-ductility concrete |
| CN115849842A (en) * | 2022-12-23 | 2023-03-28 | 邦力固(上海)化工科技发展有限公司 | Concrete for terrace and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02302350A (en) * | 1989-05-16 | 1990-12-14 | Denki Kagaku Kogyo Kk | Rapid hardening elastic composition |
| CN102557555A (en) * | 2011-12-28 | 2012-07-11 | 河南大学 | Mineral fiber-modified flexible rubber concrete |
| CN103664069A (en) * | 2013-08-30 | 2014-03-26 | 江南大学 | Injection-type fiber-reinforced cement-based composite material with high ductility |
| CN108358564A (en) * | 2018-05-11 | 2018-08-03 | 江南大学 | A kind of high ductility cement-base composite material and preparation method thereof |
| CN108911648A (en) * | 2018-07-02 | 2018-11-30 | 江苏苏博特新材料股份有限公司 | A kind of sprayable early-strength superhigh tenacity mortar concrete system and preparation method thereof |
-
2018
- 2018-12-26 CN CN201811599548.7A patent/CN111362646B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02302350A (en) * | 1989-05-16 | 1990-12-14 | Denki Kagaku Kogyo Kk | Rapid hardening elastic composition |
| CN102557555A (en) * | 2011-12-28 | 2012-07-11 | 河南大学 | Mineral fiber-modified flexible rubber concrete |
| CN103664069A (en) * | 2013-08-30 | 2014-03-26 | 江南大学 | Injection-type fiber-reinforced cement-based composite material with high ductility |
| CN108358564A (en) * | 2018-05-11 | 2018-08-03 | 江南大学 | A kind of high ductility cement-base composite material and preparation method thereof |
| CN108911648A (en) * | 2018-07-02 | 2018-11-30 | 江苏苏博特新材料股份有限公司 | A kind of sprayable early-strength superhigh tenacity mortar concrete system and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 冯乃谦: "《高性能混凝土》", 31 August 1996, 中国建材工业出版社 * |
| 张海波: "《废旧橡胶水泥混凝土界面与性能》", 30 September 2018, 冶金工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115819045A (en) * | 2022-12-16 | 2023-03-21 | 常州绿玛特建筑科技有限公司 | Conductive high-ductility concrete |
| CN115819045B (en) * | 2022-12-16 | 2024-01-19 | 常州绿玛特建筑科技有限公司 | Conductive high-ductility concrete |
| CN115849842A (en) * | 2022-12-23 | 2023-03-28 | 邦力固(上海)化工科技发展有限公司 | Concrete for terrace and preparation method and application thereof |
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