CN105060779B - A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure - Google Patents
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure Download PDFInfo
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- CN105060779B CN105060779B CN201510439681.6A CN201510439681A CN105060779B CN 105060779 B CN105060779 B CN 105060779B CN 201510439681 A CN201510439681 A CN 201510439681A CN 105060779 B CN105060779 B CN 105060779B
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Abstract
The present invention relates to a kind of High Performance Fiber Reinforced Cement-based Composites reinforced for the reinforced concrete structure that ftractureed under adverse circumstances；Belong to building material technical field.The composite is mixed by cement, silica flour, swelling agent, water reducer, fine sand, fiber and water, gross mass percentage wherein shared by cement, silica flour, swelling agent, water reducer, fine sand and fiber is 77.6%~88.0%, and it is 12.0%~22.4% that water accounts for mass percent.Composite designed by the present invention has higher elasticity modulus, high tensile strength and compressive strength, stronger self-healing capability and hypotonicity.Material component of the present invention is reasonable in design, and construction, maintenance are simple, is easy to large-scale application.
Description
Technical field
Strengthen water the present invention relates to a kind of high-performance fiber reinforced for the reinforced concrete structure that ftractureed under adverse circumstances
Cement-based composite material；Belong to building material technical field.
Background technology
After ordinary reinforced concrete structure cracking, the deformation for needed for balance external load, crack width will expand to macroscopic view
Visible horizon so that etching medium (such as water, air, chlorion, sulfate ion) penetrates into reinforcing bar and mixes by interconnected pore
Inside Xtah Crude Clay structure, not only reduce structural bearing capacity, and reduce structure durability.Thus, it is larger, logical for the moist, temperature difference
Cracking reinforced concrete structure in the adverse circumstances such as wind is not good, it is necessary to which exploitation not only has such as high tensile property, and (tension is strong
Degree, ductility) with high pressure resistance can the very-high performance such as (compression strength, compressive ultimate strain), and with hypotonicity (water penetration,
Gas permeability) with the reinforcement material of the surface protecting function such as self-healing capability and weak neutralisation.
Fiber reinforced cement-based composite material can effectively limit table after cracking, and cracking because of the presence of fiber bridging action
Reveal multiple crack growth feature, realize the innoxious dispersion in crack, with the advantage such as ductility high and surface protection.Additionally, fiber reinforcement
The matrix of cement-base composite material can according to the actual requirements use different ratio so that matrix material is fine and close, obtains such as higher
The very-high performance such as tensile strength and compressive strength, hypotonicity (water penetration, gas permeability) and self-healing capability and weak neutralisation etc.
Surface protecting function.
Elastic modelling quantity occur factor influences relatively low (small because the ratio of mud is larger etc. for existing fiber reinforced cement-based composite material
In 20GPa) etc. weak point, cause the capability and deformation of fiber reinforced cement-based composite material reinforced steel concrete structure
Ability improves unobvious.And then cause that existing fiber reinforced cement-based composite material is difficult to the reinforcing bar that ftractures under adverse circumstances
The reinforcing of concrete structure；Or using effect is undesirable.
The content of the invention
The present invention reinforces actual demand for the reinforced concrete structure that ftractureed under adverse circumstances, there is provided one kind is for severe
The High Performance Fiber Reinforced Cement-based Composites that the reinforced concrete structure that ftractureed under environment is reinforced.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The composite
Following components are included with mass percent：
Cement 55%~67%, preferably 56%~66%, more preferably 57.0%~65.0%；
Silica flour 8.0%~13.5%, preferably 8.5%~13.0%, more preferably 9.0%~12.5%；
Swelling agent 1.7%~2.4%, preferably 2.0%~2.3%, more preferably 1.9%~2.2%；
Water reducer 0.8%~1.0%；
Fine sand 5.5%~9.0%；
Fiber 0.4%~1.1%, preferably 0.5%~1.0%, more preferably 0.6%~0.9%；
Water 12.0%~22.4%.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The cement is low
Hot Cement is preferably the low-heat cement that strength grade is 42.5 grades.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The nothing of the silica flour
Sizing SiO2Content is more than 90%.Its average grain diameter degree is 0.1um.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The swelling agent is
Commercially available aluminium sulfate class cement expansive material.Such as UEA, alumite plumping agent EA-L-type.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The water reducer is
Polycarboxylic Superplasticizer or naphthalene series high-efficiency water-reducing agent.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The fine sand is straight
Quartz sand of the footpath less than or equal to 0.5mm, the preferably quartz sand of 0.1mm-0.5mm, the more preferably quartz of 0.2-0.5mm
Sand.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The fiber is poly-
Vinyl fiber and/or vinal.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The polyethylene fiber
The elastic modelling quantity of dimension is 25GPa~40Gpa, tensile strength is 880MPa~1800MPa.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The polyethylene fiber
The average length of dimension is 4mm~8mm, average diameter is 10 μm~14 μm.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The polyvinyl alcohol
The elastic modelling quantity of fiber is 88GPa~120Gpa, tensile strength is 880MPa~1800MPa.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The polyvinyl alcohol
The average length of fiber is 10mm~14mm, average diameter is 37 μm~41 μm.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The fiber reinforcement water
The ultimate tensile strength of cement-based composite material is more than or equal to 0.85%, preferably 0.85%~2.5%, more preferably 1.8-
2.5%, final tensile strength is more than or equal to 5.3MPa.
A kind of fiber reinforced cement-based composite material reinforced for reinforced concrete structure of the present invention；The composite
28d compression strength is in more than 70MPa, preferably 90-100MPa, corresponding ultimate compressive strain 0.40% or so.
Beneficial effect
The present invention uses fully dispersed ultra-fine silicon ash particle, is filled in the space that cement granules pile up system, realizes
Particle packing is densified, then forms high solidity particle packing system by high efficiency water reducing agent so that fibre reinforced cement base is answered
Condensation material have the very-high performances such as higher elasticity modulus, high tensile strength and compressive strength, stronger self-healing capability and
Hypotonicity.The neutralisation ability (chloride ion transport ability) of the composite finished product designed by the present invention is significantly smaller than general simultaneously
Logical concrete, thus the decay resistance of material is higher, and then reduce the corrosion of material internal reinforcing bar.
The polyethylene fibre and/or vinal elastic modelling quantity that the present invention is selected are higher, by itself and appropriate water
Mud, silica flour, swelling agent, water reducer, fine sand, the synergy of water have obtained the cement-base composite material of superior performance；Such as gained
Finished product has the very-high performance such as high tensile property (tensile strength, ductility) and high pressure resistance energy (compression strength, compressive ultimate strain),
Also there is the surface protecting functions such as hypotonicity (water penetration, gas permeability) and self-healing capability, weak neutralisation simultaneously.
The reason for gained finished product of the invention possesses high tensile property may be：
The polyethylene fibre and/or vinal elastic modelling quantity that the present invention is selected are higher, by itself and appropriate water
Mud, silica flour, swelling agent, water reducer, fine sand, the synergy of water so that gained finished product during ductility higher is produced, fiber
Sliding but few fibrous fracture are produced with matrix, and fracture width produced by material is extremely tiny and realizes innoxious dispersion.
The reason for gained finished product of the invention possesses high pressure resistance energy may be：
Because each component collocation is reasonable so that the matrix of material is very fine and close, and in the bridging action of fiber, the material can be obtained
Obtain high compressive strength.By adjusting glue mass ratio (optimum range 0.18 to 0.30 of glue mass ratio), 28d compression strength exists
More than 70MPa, corresponding ultimate compressive strain 0.40% or so.
The reason for gained finished product of the invention possesses hypotonicity and self-healing capability may be：
Fracture width because the matrix of material is very fine and close, produced by material is extremely tiny and realizes innoxious dispersion,
High Performance Fiber Reinforced Cement-based Composites permeability (water penetration, gas permeability) of the present invention is significantly lower than common coagulation
Soil (less than the 1/10 of concrete), and product at material cracks causes that fine cracks are inaccessible, material has self-healing capability.
The present invention is proper because each component and amounts of components are used so that the neutralisation ability (chlorion of gained finished product
Transfer ability) be significantly smaller than normal concrete, thus the decay resistance of material is higher, and material internal reinforcing bar anticorrosive energy
Power is greatly improved.
Brief description of the drawings
Accompanying drawing 1 is the performance signal of the fiber reinforced cement-based composite material for reinforced concrete structure reinforcing of ftractureing
Figure；
In Fig. 1, abscissa is the ultimate tensile strength of material, and ordinate is tensile strength；No. 1 curve is that existing cost is high
Superhigh intensity fibre reinforced concrete ultimate tensile strength and tensile strength graph of a relation；No. 2 curves are the embodiment of the present invention 1
The ultimate tensile strength of gained finished product and the graph of a relation of tensile strength；No. 3 curves are that existing general fibre strengthens cement base composite wood
The ultimate tensile strength of material and the graph of a relation of tensile strength.As can be seen from the figure：The high superhigh intensity fiber of existing cost increases
The tensile strength of reinforced concrete is higher, but its ultimate tensile strength is substantially not enough, causes its range of application to be very restricted；It is existing
Although there is general fibre enhancing cement-base composite material ultimate tensile strength larger, tensile strength wretched insufficiency, therefore also cause
Its range of application is very restricted.Composite prepared by the present invention has excellent stretching with compressive strength, hardening
Strain.
Specific embodiment
The invention provides a kind of high-performance fiber enhancing reinforced for the reinforced concrete structure that ftractureed under adverse circumstances
Cement-base composite material, the present invention is described further with reference to the accompanying drawings and detailed description.
Embodiment 1
A kind of High Performance Fiber Reinforced Cement-based base composite wood reinforced for the reinforced concrete structure that ftractureed under adverse circumstances
Material, the composite is mixed by cement, silica flour, swelling agent, high efficiency water reducing agent, fine sand, fiber and water, wherein cement, silicon
Gross mass percentage shared by powder, swelling agent, high efficiency water reducing agent, fine sand and fiber is 77.6%, and water accounts for mass percent and is
22.4%.
Cement is the low-heat cement that strength grade is 42.5 grades, and (it puts down the SILICA FUME that silica flour is produced for Elkem companies of Norway
Equal particle diameter degree is 0.1um), swelling agent is commercially available aluminium sulfate class cement expansive material, and water reducer is the efficient diminishing of polycarboxylic acid
Agent, fine sand is quartz sand of the diameter less than 0.5mm, and fiber is the high-strength polyethylene fiber of Toyobo, Japan's production.On
State each component account for respectively the composite gross mass mass percent it is as follows：Low-heat cement 55.0%；Silica flour 13.5%；It is swollen
Swollen dose 1.7%；High efficiency water reducing agent 0.8%；Fine sand 5.5%；Fiber 1.1%.
A kind of above-mentioned High Performance Fiber Reinforced Cement-based base reinforced for the reinforced concrete structure that ftractureed under adverse circumstances is answered
The preparation of condensation material：Cement, silica flour, swelling agent, high efficiency water reducing agent, fine sand and fiber and water are mixed, product is obtained.
The result of the test that the present embodiment obtains the properties of product is listed in table 1.Wherein, test block used by mechanical test is in mark
Quasi- fog room carries out water curing in 28 days (temperature is 20 ± 2 DEG C), is made a strength test on mechanics machine thereafter.Additionally, adopting
Chlorion depth of invasion is determined with electrophoresis tests, is determined with reference to the coefficient of permeability assay method of Japanese concrete engineering association suggestion
Coefficient of permeability, air transmission coefficient is determined by Torrent air permeability tests.
The fiber reinforced cement-based composite material test result of 1 embodiment of table 1 (28 days)
Embodiment 2
A kind of High Performance Fiber Reinforced Cement-based base composite wood reinforced for the reinforced concrete structure that ftractureed under adverse circumstances
Material, the composite is mixed by cement, silica flour, swelling agent, high efficiency water reducing agent, fine sand, fiber and water, wherein cement, silicon
Gross mass percentage shared by powder, swelling agent, high efficiency water reducing agent, fine sand and fiber is 83.7%, and water accounts for mass percent and is
16.3%.
Cement is the low-heat cement that strength grade is 42.5 grades, and silica flour is the SILICA FUME of Elkem companies of Norway production, expansion
Agent is commercially available aluminium sulfate class cement expansive material, and water reducer is Polycarboxylic Superplasticizer, and fine sand is that diameter is less than 0.5mm
Quartz sand, fiber be Toyobo, Japan production high-strength polyethylene fiber.Above-mentioned each component accounts for described compound respectively
The mass percent of material gross mass is as follows：Low-heat cement 61.5%；Silica flour 11.2%；Swelling agent 1.9%；High efficiency water reducing agent
0.9%；Fine sand 7.5%；Fiber 0.7%.
A kind of above-mentioned High Performance Fiber Reinforced Cement-based base reinforced for the reinforced concrete structure that ftractureed under adverse circumstances is answered
The preparation of condensation material：Cement, silica flour, swelling agent, high efficiency water reducing agent, fine sand and fiber and water are mixed, product is obtained.
The result of the test that the present embodiment obtains the properties of product is listed in table 2.Wherein, test block used by mechanical test is in mark
Quasi- fog room carries out water curing in 28 days (temperature is 20 ± 2 DEG C), is made a strength test on mechanics machine thereafter.Additionally, adopting
Chlorion depth of invasion is determined with electrophoresis tests, is determined with reference to the coefficient of permeability assay method of Japanese concrete engineering association suggestion
Coefficient of permeability, air transmission coefficient is determined by Torrent air permeability tests.
The embodiment fiber reinforced cement-based composite material test result (28 days) of table 2
Embodiment 3
A kind of High Performance Fiber Reinforced Cement-based base composite wood reinforced for the reinforced concrete structure that ftractureed under adverse circumstances
Material, the composite is mixed by cement, silica flour, swelling agent, high efficiency water reducing agent, fine sand, fiber and water, wherein cement, silicon
Gross mass percentage shared by powder, swelling agent, high efficiency water reducing agent, fine sand and fiber is 87.8%, and water accounts for mass percent and is
12.2%.
Cement is the low-heat cement that strength grade is 42.5 grades, and silica flour is the SILICA FUME of Elkem companies of Norway production, expansion
Agent is commercially available aluminium sulfate class cement expansive material, and water reducer is Polycarboxylic Superplasticizer, and fine sand is that diameter is less than 0.5mm
Quartz sand, fiber be Toyobo, Japan production high-strength polyethylene fiber.Above-mentioned each component accounts for described compound respectively
The mass percent of material gross mass is as follows：Low-heat cement 67.0%；Silica flour 8.0%；Swelling agent 2.4%；High efficiency water reducing agent
1.0%；Fine sand 9.0%；Fiber 0.4%.
A kind of above-mentioned High Performance Fiber Reinforced Cement-based base reinforced for the reinforced concrete structure that ftractureed under adverse circumstances is answered
The preparation of condensation material：Cement, silica flour, swelling agent, high efficiency water reducing agent, fine sand and fiber and water are mixed, product is obtained.
The result of the test that the present embodiment obtains the properties of product is listed in table 1.Wherein, test block used by mechanical test is in mark
Quasi- fog room carries out water curing in 28 days (temperature is 20 ± 2 DEG C), is made a strength test on mechanics machine thereafter.Additionally, adopting
Chlorion depth of invasion is determined with electrophoresis tests, is determined with reference to the coefficient of permeability assay method of Japanese concrete engineering association suggestion
Coefficient of permeability, air transmission coefficient is determined by Torrent air permeability tests.
The embodiment fiber reinforced cement-based composite material test result (28 days) of table 3
Claims (8)
1. it is a kind of for reinforced concrete structure reinforce fiber reinforced cement-based composite material, it is characterised in that；It is described compound
Material includes following components with mass percent：
Cement 56% ~ 66%；
Silica flour 8.5% ~ 13.0%；
Swelling agent 2.0% ~ 2.3%；
Water reducer 0.8% ~ 1.0%；
Fine sand 5.5% ~ 9.0%；
Fiber 0.5% ~ 1.0%；
Water 12.0% ~ 22.4%；Or
The composite includes following components with mass percent：
Cement 57.0% ~ 65.0%；
Silica flour 9.0% ~ 12.5%；
Swelling agent 1.9% ~ 2.2%；
Water reducer 0.8% ~ 1.0%；
Fine sand 5.5% ~ 9.0%；
Fiber 0.6% ~ 0.9%；
Water 12.0% ~ 22.4%.
2. it is according to claim 1 it is a kind of for reinforced concrete structure reinforce fiber reinforced cement-based composite material,
It is characterized in that：The cement is low-heat cement.
3. it is according to claim 1 it is a kind of for reinforced concrete structure reinforce fiber reinforced cement-based composite material,
It is characterized in that：The unformed SiO of the silica flour2Weight/mass percentage composition be more than or equal to 90%.
4. it is according to claim 1 it is a kind of for reinforced concrete structure reinforce fiber reinforced cement-based composite material,
It is characterized in that：
The swelling agent is aluminium sulfate class cement expansive material；
The water reducer is Polycarboxylic Superplasticizer or naphthalene series high-efficiency water-reducing agent；
The fine sand is quartz sand of the diameter less than or equal to 0.5 mm.
5. it is according to claim 1 it is a kind of for reinforced concrete structure reinforce fiber reinforced cement-based composite material,
It is characterized in that：The fiber is polyethylene fibre and/or vinal.
6. it is according to claim 5 it is a kind of for reinforced concrete structure reinforce fiber reinforced cement-based composite material,
It is characterized in that：
The elastic modelling quantity of the polyethylene fibre is 25GPa ~ 40Gpa, tensile strength is 880MPa ~ 1800MPa, its average length
For 4 mm ~ 8 mm, average diameter are 10 μm ~ 14 μm；
The elastic modelling quantity of the vinal is 88GPa ~ 120Gpa, tensile strength is 880MPa ~ 1800MPa, and its is average
Length is 10 mm ~ 14 mm, average diameter is 37 μm ~ 41 μm.
7. it is according to claim 1 it is a kind of for reinforced concrete structure reinforce fiber reinforced cement-based composite material,
It is characterized in that：The ultimate tensile strength of the fiber reinforced cement-based composite material condensation material is more than or equal to 0.85%, final stretching
Intensity is more than or equal to 5.3MPa.
8. it is according to claim 1 it is a kind of for reinforced concrete structure reinforce fiber reinforced cement-based composite material,
It is characterized in that：The fiber reinforced cement-based composite material 28d compression strength is more than or equal to 70 MPa.
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| CN106673527A (en) * | 2017-01-03 | 2017-05-17 | 深圳大学 | Cement-based inorganic cementing material and preparation method thereof |
| CN107382187A (en) * | 2017-06-26 | 2017-11-24 | 山东建筑大学 | Reinforcement of concrete post method based on Green High Performance fiber reinforced cement-based composite material |
| CN108017355A (en) * | 2017-12-07 | 2018-05-11 | 成都东蓝星新材料有限公司 | High speed railway sound barrier anchoring cement base self-healing composite material and preparation method thereof |
| CN111423180A (en) * | 2020-04-15 | 2020-07-17 | 福州市宇心建材科技有限公司 | High-fluidity environment-friendly ultra-high-performance concrete and preparation method thereof |
| CN112210347A (en) * | 2020-10-09 | 2021-01-12 | 黑龙江省琼冰建筑设计有限公司 | High-performance composite ice material and preparation method thereof |
| CN112341099A (en) * | 2020-11-23 | 2021-02-09 | 交通运输部天津水运工程科学研究所 | High-ductility repair mortar with self-healing function and preparation method thereof |
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| CN101935201B (en) * | 2009-06-30 | 2012-09-05 | 中冶建筑研究总院有限公司 | Single-component high-performance mortar for repairing and reinforcing concrete |
| CN103274653B (en) * | 2013-05-09 | 2014-12-24 | 清华大学 | High-flexibility and low-shrinkage fiber reinforced cement-based composite material |
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Application publication date: 20151118 Assignee: Nanjing Xuantong Construction Engineering Co., Ltd Assignor: Nanjing Forestry University Contract record no.: X2019320000152 Denomination of invention: Fiber reinforced cement based composite material for reinforcing reinforced concrete structure Granted publication date: 20170627 License type: Common License Record date: 20191022 Application publication date: 20151118 Assignee: Nanjing Yongchuang Municipal Engineering Co., Ltd Assignor: Nanjing Forestry University Contract record no.: X2019320000154 Denomination of invention: Fiber reinforced cement based composite material for reinforcing reinforced concrete structure Granted publication date: 20170627 License type: Common License Record date: 20191022 |