CN108409251A - A kind of high tenacity cement-based material and preparation method thereof - Google Patents
A kind of high tenacity cement-based material and preparation method thereof Download PDFInfo
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- CN108409251A CN108409251A CN201810388412.5A CN201810388412A CN108409251A CN 108409251 A CN108409251 A CN 108409251A CN 201810388412 A CN201810388412 A CN 201810388412A CN 108409251 A CN108409251 A CN 108409251A
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- based material
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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
-
- 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
Abstract
The invention discloses the raw material compositions of a kind of high tenacity cement-based material and preparation method thereof, including following parts by weight：12 18 parts of 10 20 parts of styrene-butadiene emulsion, 30 50 parts of portland cement, 15 25 parts of flyash, 7 15 parts of composite reinforcing fiber, 6 14 parts of silicon ash, 4 10 parts of mica powder, 15 parts of dispersant, 25 parts of water-reducing agent, 0.5 3.5 parts of thickener and water.The compound incorporation that the present invention passes through styrene-butadiene emulsion, composite reinforcing fiber, while increasing the adhesion strength of composite reinforcing fiber and concrete after concrete substrate flexibility and concrete cracking, to achieve the purpose that enhance toughness of concrete; styrene-butadiene emulsion can be dehydrated in concrete hardens into three-dimensional continuous film structure; so that concrete shows high-tension, good plasticity, high impact flexibility; and styrene-butadiene emulsion can be such that composite reinforcing fiber is bonded closely with cement, improve the cracking resistance of the material.
Description
Technical field
The present invention relates to building material technical fields, and in particular to a kind of high tenacity cement-based material and preparation method thereof.
Background technology
Construction material is the basis of architectural engineering, and concrete is most widely used construction material, main component packet
Cement, admixture and aggregate are included, adds water stirring after-hardening to form, has many advantages, such as simple for process, fire protecting performance.But concrete has
Fracture width is difficult to control after having the shortcomings that low tensile strength, poor toughness and cracking, therefore, in traditional reinforced concrete structure
In, frequent occurrence due to crack leads to steel bar corrosion and occurs engineering accident.Concrete structure crack directly affects structure
Durability and engineering service life, eventually lead to concrete structure and prematurely deteriorate or even completely lose using function.For
These disadvantages of concrete, carbon fiber reinforced concrete and composite reinforcing fiber concrete etc. are overcome to come into being, the fibre of this kind of concrete
Dimension volume is usually less than 2%, and mitigation concrete bracing is played to a certain extent although doing so, and it is tough to improve material bending resistance
The effects that spending, but strain softening destruction still occurs under uniaxial direct tensile load action, crack immediately enters localization and expands after cracking
The exhibition stage.
Based on this, it is necessary to a kind of high tenacity cement-based material and preparation method thereof is provided, to solve to deposit in the prior art
The problem of.
Invention content
In view of the above-mentioned analysis to the prior art, a kind of high tenacity cement-based material of present invention offer and preparation method thereof,
Cement-based material, which is made, has preferable flexibility, crack resistance and crooked deformability, solves conventional concrete tensile strength
The shortcomings of fracture width is difficult to control after low, poor toughness and cracking.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of high tenacity cement-based material includes the raw material composition of following parts by weight：10-20 parts of styrene-butadiene emulsion, silicate cement
30-50 parts of mud, 15-25 parts of flyash, 7-15 parts of composite reinforcing fiber, 6-14 parts of silicon ash, 4-10 parts of mica powder, dispersant 1-5
Part, 2-5 parts of water-reducing agent, 0.5-3.5 parts of thickener and 12-18 parts of water.
Preferably, the raw material including following parts by weight forms：15 parts of styrene-butadiene emulsion, 40 parts of portland cement, fine coal
Ash 20 parts, 11 parts of composite reinforcing fiber, 10 parts of silicon ash, 7 parts of mica powder, 3 parts of dispersant, 3.5 parts of water-reducing agent, 2 parts of thickener and
15 parts of water.
Preferably, it is 2-4 that the composite reinforcing fiber, which is weight ratio,:The combination of 1 carbon fiber and polyimide fiber
Object.
Preferably, the flyash is level-one flyash.
Preferably, the dispersant is copper stearate.
Preferably, the water-reducing agent is High-efficiency polycarboxylic acid based water reducer, and solid content 40%, water-reducing rate 25%.
Preferably, the thickener is cellulose ether.
The present invention also provides the preparation methods of above-mentioned high tenacity cement-based material, include the following steps：
（1）In parts by weight, 10-20min is mixed in the portland cement weighed up, flyash, silicon ash, mica powder first,
Then plus water and water-reducing agent stir 3-5min, add styrene-butadiene emulsion, thickener stirring 3-5min, obtain mixture slurry；
（2）Above-mentioned mixture slurry is heated to 60-70 degree and keeps the temperature 20-30min, composite strengthening is added after being then cooled to room temperature
Fiber and dispersant, continue stirring until fiber dispersity it is good, without conglomeration, obtain fibrous mixture slurry；
（3）By step（2）Gained mixture slurry pours into die for molding, is demoulded after standing 4-6h, and it is 25 degree, humidity to be put into temperature
90% or more fog room carries out standard curing 28d to get high tenacity cement-based material.
Compared with prior art, the present invention having following advantageous effect：
（1）The present invention is by the compound incorporation of styrene-butadiene emulsion, composite reinforcing fiber, while it is flexible and mixed to increase concrete substrate
The adhesion strength of composite reinforcing fiber and concrete after solidifying soil cracking, to achieve the purpose that enhance toughness of concrete, wherein fourth
Benzene lotion is done enough to improve cement matrix itself toughness, and polymer is dehydrated in concrete and hardens into three-dimensional continuous film knot
Structure, intertexture are interspersed in concrete so that concrete shows high-tension, good plasticity, high impact flexibility, and fourth
Benzene lotion can largely assemble in slurry and composite reinforcing fiber interface, improve paste structure at this, composite reinforcing fiber and water
Mud bonds closely, improves the cracking resistance of the material.
（2）The present invention improves the toughness and blocking effect of material, and the composite reinforcing fiber is uniform by dispersant
Distribution, and mechanical property is changed, significantly improve the ability of the resistance to deformation of material, the generation cracking of concrete and fracture
Probability reduce.
（3）The mica powder that the present invention adds is distributed in cement concrete, can effectively improve concrete mechanical property and
Thermal stability.
（4）The preparation method of the high tenacity cement-based material of the present invention is simple, it is easy to accomplish, it is easy to implement, it can use extensively
In wall, roofing, terrace and road, bridge, tunnel, the slope reinforcement of industry and civil buildings.
Specific implementation mode
Form by the following examples is described in further detail the above of the present invention again, but should not be by this
The range for being interpreted as the above-mentioned theme of the present invention is only limitted to following embodiment, all based on the technology realized belonging to the above of the present invention
It all belongs to the scope of the present invention.
Embodiment 1
A kind of high tenacity cement-based material includes the raw material composition of following parts by weight：10 parts of styrene-butadiene emulsion, portland cement 30
Part, 15 parts of flyash, 7 parts of composite reinforcing fiber, 6 parts of silicon ash, 4 parts of mica powder, 1 part of dispersant, 2 parts of water-reducing agent, thickener 0.5
12 parts of part and water.
Wherein, it is 2 that the composite reinforcing fiber, which is weight ratio,:1 carbon fiber and the composition of polyimide fiber.
Wherein, the flyash is level-one flyash.
Wherein, the dispersant is copper stearate.
Wherein, the water-reducing agent is High-efficiency polycarboxylic acid based water reducer, solid content 40%, water-reducing rate 25%.
Wherein, the thickener is cellulose ether.
The present invention also provides the preparation methods of above-mentioned high tenacity cement-based material, include the following steps：
（1）In parts by weight, 10min is mixed in the portland cement weighed up, flyash, silicon ash, mica powder first, then
Add water and water-reducing agent to stir 3min, adds styrene-butadiene emulsion, thickener stirring 3min, obtain mixture slurry；
（2）Above-mentioned mixture slurry is heated to 60 degree and keeps the temperature 20min, be then cooled to after room temperature be added composite reinforcing fiber and
Dispersant, continue stirring until fiber dispersity it is good, without conglomeration, obtain fibrous mixture slurry；
（3）By step（2）Gained mixture slurry pours into die for molding, is demoulded after standing 4h, and it is 25 degree, humidity to be put into temperature
90% or more fog room carries out standard curing 28d to get high tenacity cement-based material.
Embodiment 2
A kind of high tenacity cement-based material includes the raw material composition of following parts by weight：20 parts of styrene-butadiene emulsion, portland cement 50
Part, 25 parts of flyash, 15 parts of composite reinforcing fiber, 14 parts of silicon ash, 10 parts of mica powder, 5 parts of dispersant, 5 parts of water-reducing agent, thickener
3.5 parts and 18 parts of water.
Wherein, it is 4 that the composite reinforcing fiber, which is weight ratio,:1 carbon fiber and the composition of polyimide fiber.
Wherein, the flyash is level-one flyash.
Wherein, the dispersant is copper stearate.
Wherein, the water-reducing agent is High-efficiency polycarboxylic acid based water reducer, solid content 40%, water-reducing rate 25%.
Wherein, the thickener is cellulose ether.
The present invention also provides the preparation methods of above-mentioned high tenacity cement-based material, include the following steps：
（1）In parts by weight, 20min is mixed in the portland cement weighed up, flyash, silicon ash, mica powder first, then
Add water and water-reducing agent to stir 5min, adds styrene-butadiene emulsion, thickener stirring 5min, obtain mixture slurry；
（2）Above-mentioned mixture slurry is heated to 70 degree and keeps the temperature 30min, be then cooled to after room temperature be added composite reinforcing fiber and
Dispersant, continue stirring until fiber dispersity it is good, without conglomeration, obtain fibrous mixture slurry；
（3）By step（2）Gained mixture slurry pours into die for molding, is demoulded after standing 6h, and it is 25 degree, humidity to be put into temperature
90% or more fog room carries out standard curing 28d to get high tenacity cement-based material.
Embodiment 3
A kind of high tenacity cement-based material includes the raw material composition of following parts by weight：15 parts of styrene-butadiene emulsion, portland cement 40
Part, 20 parts of flyash, 11 parts of composite reinforcing fiber, 10 parts of silicon ash, 7 parts of mica powder, 3 parts of dispersant, 3.5 parts of water-reducing agent, thickening
15 parts of 2 parts of agent and water.
Wherein, it is 3 that the composite reinforcing fiber, which is weight ratio,:1 carbon fiber and the composition of polyimide fiber.
Wherein, the flyash is level-one flyash.
Wherein, the dispersant is copper stearate.
Wherein, the water-reducing agent is High-efficiency polycarboxylic acid based water reducer, solid content 40%, water-reducing rate 25%.
Wherein, the thickener is cellulose ether.
The present invention also provides the preparation methods of above-mentioned high tenacity cement-based material, include the following steps：
（1）In parts by weight, 15min is mixed in the portland cement weighed up, flyash, silicon ash, mica powder first, then
Add water and water-reducing agent to stir 4min, adds styrene-butadiene emulsion, thickener stirring 4min, obtain mixture slurry；
（2）Above-mentioned mixture slurry is heated to 65 degree and keeps the temperature 25min, be then cooled to after room temperature be added composite reinforcing fiber and
Dispersant, continue stirring until fiber dispersity it is good, without conglomeration, obtain fibrous mixture slurry；
（3）By step（2）Gained mixture slurry pours into die for molding, is demoulded after standing 5h, and it is 25 degree, humidity to be put into temperature
90% or more fog room carries out standard curing 28d to get high tenacity cement-based material.
Embodiment 4
A kind of high tenacity cement-based material includes the raw material composition of following parts by weight：10 parts of styrene-butadiene emulsion, portland cement 50
Part, 15 parts of flyash, 15 parts of composite reinforcing fiber, 8 parts of silicon ash, 6 parts of mica powder, 5 parts of dispersant, 2 parts of water-reducing agent, thickener 1
12 parts of part and water.
Wherein, it is 2.5 that the composite reinforcing fiber, which is weight ratio,:1 carbon fiber and the composition of polyimide fiber.
Wherein, the flyash is level-one flyash.
Wherein, the dispersant is copper stearate.
Wherein, the water-reducing agent is High-efficiency polycarboxylic acid based water reducer, solid content 40%, water-reducing rate 25%.
Wherein, the thickener is cellulose ether.
The present invention also provides the preparation methods of above-mentioned high tenacity cement-based material, include the following steps：
（1）In parts by weight, 12min is mixed in the portland cement weighed up, flyash, silicon ash, mica powder first, then
Add water and water-reducing agent to stir 3.5min, adds styrene-butadiene emulsion, thickener stirring 4.5min, obtain mixture slurry；
（2）Above-mentioned mixture slurry is heated to 60 degree and keeps the temperature 20min, be then cooled to after room temperature be added composite reinforcing fiber and
Dispersant, continue stirring until fiber dispersity it is good, without conglomeration, obtain fibrous mixture slurry；
（3）By step（2）Gained mixture slurry pours into die for molding, is demoulded after standing 4h, and it is 25 degree, humidity to be put into temperature
90% or more fog room carries out standard curing 28d to get high tenacity cement-based material.
Embodiment 5
A kind of high tenacity cement-based material includes the raw material composition of following parts by weight：20 parts of styrene-butadiene emulsion, portland cement 30
Part, 25 parts of flyash, 7 parts of composite reinforcing fiber, 10 parts of silicon ash, 10 parts of mica powder, 3 parts of dispersant, 3.5 parts of water-reducing agent, thickening
18 parts of 1.5 parts of agent and water.
Wherein, it is 3.5 that the composite reinforcing fiber, which is weight ratio,:1 carbon fiber and the composition of polyimide fiber.
Wherein, the flyash is level-one flyash.
Wherein, the dispersant is copper stearate.
Wherein, the water-reducing agent is High-efficiency polycarboxylic acid based water reducer, solid content 40%, water-reducing rate 25%.
Wherein, the thickener is cellulose ether.
The present invention also provides the preparation methods of above-mentioned high tenacity cement-based material, include the following steps：
（1）In parts by weight, 18min is mixed in the portland cement weighed up, flyash, silicon ash, mica powder first, then
Add water and water-reducing agent to stir 3min, adds styrene-butadiene emulsion, thickener stirring 4min, obtain mixture slurry；
（2）Above-mentioned mixture slurry is heated to 65 degree and keeps the temperature 25min, be then cooled to after room temperature be added composite reinforcing fiber and
Dispersant, continue stirring until fiber dispersity it is good, without conglomeration, obtain fibrous mixture slurry；
（3）By step（2）Gained mixture slurry pours into die for molding, is demoulded after standing 6h, and it is 25 degree, humidity to be put into temperature
90% or more fog room carries out standard curing 28d to get high tenacity cement-based material.
Comparative example 1
This comparative example 1 eliminates styrene-butadiene emulsion, other same as Example 3.
Comparative example 2
This comparative example 2 has changed composite reinforcing fiber into vinal, other same as Example 3.
Experimental example 1
By high tenacity cement-based material made from high tenacity cement-based material made from embodiment 1-5 and comparative example 1, comparative example 2
Mechanical property tested, the results are shown in Table 1.
Table 1
| Sample | Compression strength（MPa） | Flexural strength（Mpa） | Bending toughness index I20 |
| Embodiment 1 | 55.8 | 22.2 | 21.9 |
| Embodiment 2 | 57.5 | 22.4 | 21.2 |
| Embodiment 3 | 59.8 | 22.5 | 20.4 |
| Embodiment 4 | 56.7 | 22.3 | 20.7 |
| Embodiment 5 | 56.3 | 22.6 | 21.4 |
| Comparative example 1 | 53.2 | 17.8 | 22.5 |
| Comparative example 2 | 43.6 | 18.1 | 22.8 |
1 explanation of table：Compared with comparative example 1, comparative example 2, high tenacity cement-based material prepared by the present invention has good mechanics
Performance illustrates that styrene-butadiene emulsion and composite reinforcing fiber have facilitation to the mechanical property of reinforcing material.
Experimental example 2
By high tenacity cement-based material made from high tenacity cement-based material made from embodiment 1-5 and comparative example 1, comparative example 2
Stability, endurance quality tested, the results are shown in Table 2
Table 2
| Sample | It is impervious（MPa） | 60d shrinking percentages（10-6） | Wearability（kg/m3) |
| Embodiment 1 | P18 | 185 | 2.022 |
| Embodiment 2 | P18 | 178 | 2.076 |
| Embodiment 3 | P18 | 164 | 1.987 |
| Embodiment 4 | P18 | 178 | 2.042 |
| Embodiment 5 | P18 | 169 | 2.035 |
| Comparative example 1 | P16 | 214 | 2.234 |
| Comparative example 2 | P16 | 235 | 2.221 |
2 explanation of table：Compared with comparative example 1, comparison 2, high tenacity cement-based material prepared by the present invention has good durability energy,
It is dry-shrinkage deformed small.
In conclusion cement-based material, which is made, in the present invention has preferable flexibility, crack resistance and crooked deformability, solution
The shortcomings of conventional concrete of having determined tensile strength is low, fracture width is difficult to control after poor toughness and cracking.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although with reference to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features.All essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of high tenacity cement-based material, which is characterized in that the raw material composition including following parts by weight：Styrene-butadiene emulsion 10-
20 parts, 30-50 parts of portland cement, 15-25 parts of flyash, 7-15 parts of composite reinforcing fiber, 6-14 parts of silicon ash, mica powder 4-10
Part, 1-5 parts of dispersant, 2-5 parts of water-reducing agent, 0.5-3.5 parts of thickener and 12-18 parts of water.
2. high tenacity cement-based material according to claim 1, which is characterized in that the raw material group including following parts by weight
At：15 parts of styrene-butadiene emulsion, 40 parts of portland cement, 20 parts of flyash, 11 parts of composite reinforcing fiber, 10 parts of silicon ash, mica powder 7
Part, 3 parts of dispersant, 3.5 parts of water-reducing agent, 2 parts of thickener and 15 parts of water.
3. high tenacity cement-based material according to claim 1, which is characterized in that the composite reinforcing fiber is weight ratio
For 2-4:1 carbon fiber and the composition of polyimide fiber.
4. high tenacity cement-based material according to claim 1, which is characterized in that the flyash is level-one flyash.
5. high tenacity cement-based material according to claim 1, which is characterized in that the dispersant is copper stearate.
6. high tenacity cement-based material according to claim 1, which is characterized in that the water-reducing agent is High-efficiency polycarboxylic acid system
Water-reducing agent, solid content 40%, water-reducing rate 25%.
7. high tenacity cement-based material according to claim 1, which is characterized in that the thickener is cellulose ether.
8. a kind of preparation method according to claim 1-7 any one of them high tenacity cement-based materials, which is characterized in that packet
Include following steps：
（1）In parts by weight, 10-20min is mixed in the portland cement weighed up, flyash, silicon ash, mica powder first,
Then plus water and water-reducing agent stir 3-5min, add styrene-butadiene emulsion, thickener stirring 3-5min, obtain mixture slurry；
（2）Above-mentioned mixture slurry is heated to 60-70 degree and keeps the temperature 20-30min, composite strengthening is added after being then cooled to room temperature
Fiber and dispersant, continue stirring until fiber dispersity it is good, without conglomeration, obtain fibrous mixture slurry；
（3）By step（2）Gained mixture slurry pours into die for molding, is demoulded after standing 4-6h, and it is 25 degree, humidity to be put into temperature
90% or more fog room carries out standard curing 28d to get high tenacity cement-based material.
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| CN201810388412.5A CN108409251A (en) | 2018-04-26 | 2018-04-26 | A kind of high tenacity cement-based material and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110627445A (en) * | 2019-10-18 | 2019-12-31 | 中铁隧道局集团有限公司 | High-impermeability cement-based repair material for tunnel engineering and preparation method thereof |
| CN110776334A (en) * | 2019-10-31 | 2020-02-11 | 中建材料技术研究成都有限公司 | Cement-based wallboard with large hollow rate and ultrahigh toughness and preparation method thereof |
| CN112456871A (en) * | 2020-12-01 | 2021-03-09 | 杭州联体消修化工有限公司 | High-toughness bendable self-healing anti-seismic cement-based composite material |
| CN113512139A (en) * | 2020-04-10 | 2021-10-19 | 刘建敏 | Carboxylic styrene-butadiene latex, cement-based granite slab and preparation method thereof |
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2018
- 2018-04-26 CN CN201810388412.5A patent/CN108409251A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110627445A (en) * | 2019-10-18 | 2019-12-31 | 中铁隧道局集团有限公司 | High-impermeability cement-based repair material for tunnel engineering and preparation method thereof |
| CN110627445B (en) * | 2019-10-18 | 2021-12-24 | 中铁隧道局集团有限公司 | High-impermeability cement-based repair material for tunnel engineering and preparation method thereof |
| CN110776334A (en) * | 2019-10-31 | 2020-02-11 | 中建材料技术研究成都有限公司 | Cement-based wallboard with large hollow rate and ultrahigh toughness and preparation method thereof |
| CN110776334B (en) * | 2019-10-31 | 2022-04-29 | 中建西部建设建材科学研究院有限公司 | Cement-based wallboard with large hollow rate and ultrahigh toughness and preparation method thereof |
| CN113512139A (en) * | 2020-04-10 | 2021-10-19 | 刘建敏 | Carboxylic styrene-butadiene latex, cement-based granite slab and preparation method thereof |
| CN113512139B (en) * | 2020-04-10 | 2023-06-13 | 刘建敏 | Carboxylated styrene-butadiene latex, cement-based granite plate and preparation method thereof |
| CN112456871A (en) * | 2020-12-01 | 2021-03-09 | 杭州联体消修化工有限公司 | High-toughness bendable self-healing anti-seismic cement-based composite material |
| CN115849813A (en) * | 2022-12-02 | 2023-03-28 | 嘉兴学院 | Aggregate all-purpose aeolian sand concrete for building and preparation method thereof |
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Application publication date: 20180817 |