CN108658536A - A kind of fiber reinforced cement-based material and preparation method thereof - Google Patents
A kind of fiber reinforced cement-based material and preparation method thereof Download PDFInfo
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- CN108658536A CN108658536A CN201810500926.5A CN201810500926A CN108658536A CN 108658536 A CN108658536 A CN 108658536A CN 201810500926 A CN201810500926 A CN 201810500926A CN 108658536 A CN108658536 A CN 108658536A
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- Prior art keywords
- fiber reinforced
- based material
- reinforced cement
- cement
- fibre
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Classifications
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/90—Electrical properties
- C04B2111/92—Electrically insulating materials
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of fiber reinforced cement-based materials and preparation method thereof.The fiber reinforced cement-based material includes following component according to weight percent：Cement 30 32%, flyash 10 13%, coarse sand 10 16%, fine sand 25 33%, silicon ash 4 6%, water 8 9%, water-reducing agent 1 1.5%, the sum of said components are 100%；The fiber reinforced cement-based material further includes steel fibre and basalt fibre, and the volume volume of the steel fibre is 1% 2%, and the volume volume of the basalt fibre is 0 1%.The present invention greatly improves its resistivity, reduces it and the risk of electrochemical corrosion occurs under complex environment while maintaining ultra-high performance fiber reinforced cementitious composites good mechanical property.
Description
Technical field
The present invention relates to building material fields, and in particular to arrives a kind of high resistivity very-high performance fibre reinforced cement base material
Material and preparation method thereof.
Background technology
Ultra-high performance fiber reinforced cementitious composites (UHPFRC) are the very excellent water of a kind of mechanical property, durability
Cement-based material has application in building special construction, bridge etc. at present.Ultra-high performance fiber reinforced cementitious composites are good
Mechanical property can not only effectively reduce the volume of structure and conduct oneself with dignity and meet the requirements of some special constructions.It is good to reach
Mechanical property generally uses fibre-reinforced mode in design, because the incorporation of fiber can limit concrete when generating destruction
The extension of crackle shares fractional load after MATRIX CRACKING, and enhancing effect depends on the intensity combined between fiber and matrix.
In the fiber for the various unlike materials that the preparation of UHPRFC uses, using it is most common be the short steel fibre of copper facing, this fibre
Dimension is tightly combined with matrix, and enhancing effect is best.But under some particular surroundings, the especially ocean ring of high ion concentration
The appropriate in border, ultra-high performance fiber reinforced cementitious composites is not understood also.
Invention content
The present invention provides a kind of fiber reinforced cement-based material and preparation method thereof in order to solve the above problem.The fiber reinforcement
Cement-based material has larger resistivity compared to traditional fibre reinforced concrete, reduces in complex environment, concrete
The risk of electrochemical corrosion occurs.
In order to solve the above technical problems, the technical scheme is that：
A kind of fiber reinforced cement-based material, the fiber reinforced cement-based material include such as the following group according to weight percent
Point：Cement 30-32%, flyash 10-13%, coarse sand 10-16%, fine sand 25-33%, silicon ash 4-6%, water 8-9%, water-reducing agent
1-1.5%, the sum of said components are 100%；The fiber reinforced cement-based material further includes steel fibre and basalt fibre, institute
The volume volume for stating steel fibre is 1%-2%, and the volume volume of the basalt fibre is 0-1%.
In said program, a diameter of 0.05-0.2mm of steel fibre, length 5-20mm.
In said program, a diameter of 5-50 μm of the basalt fibre, length 5-15mm.
In said program, the volume ratio of the steel fibre and basalt fibre is 1：1.
In said program, the sand is the commercially available river sand of screening, and coarse sand grain size is in 0.6-1.25mm, and fine sand grain size is in 0-
0.6mm。
In said program, cement is 52.5 cement of silicate.
In said program, flyash is level-one flyash.
In said program, water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid, solid content 20%.
The preparation method of the fiber reinforced cement-based material weighs raw material in mass ratio, first by cement, flyash,
30-60s is mixed in silicon ash；Then coarse sand and fine sand are poured into the powder mixed, stir 30-60s；Again by water-reducing agent
Water mixing with 80% is poured into material, remaining water is added after stirring 10-20s, stirring to powder is slurried；Then normal sand is pressed
Starch whipping procedure, stirring；Basalt fibre is poured into after finally slowly equably first pouring into steel fibre, stir keeps fiber and slurry mixed slowly
It closes uniformly, and pours into mold molding.
The principle of the present invention is：Steel fibre is replaced using nonconducting basalt fibre part, reduces the volume of steel fibre
Score, to reduce the content of conductive component；By feed intake orderly, speed Alternating System process, fully dispersed two kinds of fibers,
And between so that part basalt fibre is invaded adjacent steel fibre, being in direct contact for steel fibre is obstructed, to reduce steel fibre
Form the possibility of continuous conduction network.The above both sides inherent mechanism is the basic principle for preparing high resistivity UHPRFC.
Realizing the approach of this principle is：The mass ratio of raw material is by according to designed by grain composition so that powder
Accumulation it is closely knit, while micropore and acceleration of hydration are filled to obtain good substrate performance by high activity fine powder (silicon ash).It stirs
It mixes in technique, mixing time will be grown compared to the mixing time of traditional cements sill, and guarantee allows water-reducing agent that can give full play to work
With；Being slowly added to fiber can cause product uneven to avoid coma is poly-；It is adopted in fiber and subsequent whipping process is added
It is to be stirred rotor in quick stirring in order to avoid steel fibre and bend to generate the reunion for leading fiber with the stirring of slow rate, to
Resistivity caused by causing the mechanical properties decrease of very-high performance fibre reinforced concrete and excessively being wound due to fiber is reduced.It adopts
Replace steel fibre with basalt fibre part, while performance steel fibre good enhancing effect, reduces the body of steel fibre
Product content, reduces contacting with each other for steel fibre, shows as improving volume resistivity, and electricity occurs so as to reduce steel fibre
The risk of chemical attack.
Beneficial effects of the present invention are：The high resistivity ultra-high performance fiber reinforced cementitious composites are compared to traditional steel
Fiber very-high performance fibre reinforced concrete has larger resistivity, reduces in complex environment, and electrochemistry occurs for concrete
The risk of corrosion.
Description of the drawings
Fig. 1 is the compression strength of 1d, 7d and the 28d of the embodiment of the present invention and comparative example.
Fig. 2 is the 28d flexural strengths of the embodiment of the present invention and comparative example.
Fig. 3 is the AC impedance spectroscopy of comparative example 3.
Fig. 4 is the AC impedance spectroscopy of embodiment 2.
Fig. 5 is the AC impedance spectroscopy of embodiment 1.
Specific implementation mode
Promotion resistivity effect in the present invention is mainly carried out by way of ac impedance spectroscopy test, and concrete is not Europe
Nurse element cannot calculate volume resistance simply by R=U/I, this test method can imitate the resistance of sample and capacitance
It should detach, and reduce the error of electrode contact.Mechanical property is said by compression strength, flexural strength test in the present invention
It is bright.
The present invention provides a kind of fiber reinforced cement-based material, and the fiber reinforced cement-based material is according to weight percent packet
Include following component：Cement 30-32%, flyash 10-13%, coarse sand 10-16%, fine sand 25-33%, silicon ash 4-6%, water 8-
9%, water-reducing agent 1-1.5%, the sum of said components are 100%；Fiber reinforced cement-based material further includes steel fibre and basalt
The volume volume of fiber, steel fibre is 1%-2%, and the volume volume of basalt fibre is 0-1%.
The a diameter of 0.05-0.2mm of steel fibre, length 5-20mm.A diameter of 5-50 μm of basalt fibre, length 5-
15mm.The volume ratio of steel fibre and basalt fibre is 1-3:1-3 is preferably 1：1.
Sand is the commercially available river sand of screening, and coarse sand grain size is in 0.6-1.25mm, and fine sand grain size is in 0-0.6mm.Cement is silicic acid
52.5 cement of salt.Flyash is level-one flyash.Water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid, solid content 20%.
The present embodiment also provides the preparation method of the fiber reinforced cement-based material, weighs raw material in mass ratio, first by water
30-60s is mixed in mud, flyash, silicon ash；Then coarse sand and fine sand are poured into the powder mixed, stir 30-60s；
The water of water-reducing agent and 80% is mixed again and is poured into material, remaining water is added after stirring 10-20s, stirring to powder is slurried；So
Standard mortar whipping procedure, stirring are pressed afterwards；Basalt fibre is poured into after finally slowly equably first pouring into steel fibre, stir makes fibre slowly
Peacekeeping slurry is uniformly mixed, and pours into mold molding.
Illustrated below with several specific embodiments.
Embodiment 1
The raw material proportioning of the present embodiment is as shown in table 1.In the present embodiment, the body of steel fibre SF and pure basalt fibre BF
Product is than being 3:1.The volume volume of steel fibre SF is 1.5%, and the volume volume of basalt fibre is 0.5%.Wherein, according to steel
Density 7.8g/cm3With basaltic density 2.7g/cm3, the quality of fiber in every cubic metre in each proportioning, i.e. table can be calculated
What is provided in 1 is the quality of steel fibre and pure basalt fibre.
Embodiment 2
The raw material proportioning of the present embodiment is as shown in table 1.In the present embodiment, the body of steel fibre SF and pure basalt fibre BF
Product is than being 1:1.The volume volume of steel fibre SF is 1%, and the volume volume of pure basalt fibre is 1%.
Embodiment 3
The raw material proportioning of the present embodiment is as shown in table 1.In the present embodiment, the body of steel fibre SF and pure basalt fibre BF
Product is than being 1:3.The volume volume of steel fibre SF is 0.5%, and the volume volume of pure basalt fibre is 1.5%.
Comparative example 1 is to comparative example 4
The raw material proportioning of comparative example 1 to comparative example 4 is as shown in table 1, is listed respectively without any fiber, only contains steel fibre
It ties up and is only compared containing basalt fibre.
1 unit (Kg/m of table3)
It is matched according to described in table 1, very-high performance fibre reinforced cement base is carried out by the technological process being described in detail in invention content
The preparation of material is molded using tri- gang moulds of 40mm × 40mm × 160mm tool, and product is conserved by GB/T17671-1999
28d.Graphite conductive adhesive adhesive electrode piece is used in test block both sides, exchange resistance is carried out using two-probe method using electrochemical workstation
The experiment of anti-spectrum, scan frequency are set as 1Mhz-1hz and are fitted using software after experimental result is depicted as Nyquist figures
The change in resistance for analyzing sample tests flexural strength and compression strength with mechanics machine.
Experiment results proved, material mechanical performance of the invention are stablized.With clean steel fiber very-high performance fibre reinforced cement
Sill is compared, and the high resistance UHPRFC prepared by the present invention also possesses higher resistance in the case where mechanical property meets
Rate.
From Fig. 1, Fig. 2 it can be seen that in terms of mechanical property：Compared with comparative example 1 and comparative example 4, each embodiment it is strong
It spends with the obvious advantage, illustrates to keep certain dosage of steel fiber maintaining mechanics aspect of performance irreplaceable；With comparative example 2 and comparison
Example 3 is compared, and the gap between embodiment 1 and the mechanical property and two comparative examples of embodiment 2 is close, it may be said that and it is bright, raw material
When fluctuation partly replaces steel fibre to Effect on Mechanical Properties very little, using basalt fibre in equal volume, mechanical property loss is smaller,
Performance loss is reduced to about 5% when losing about 10%, 28d when 1d；Embodiment 3 is compared with Examples 1 and 2, the compression strength of 28d
About 10MPa is had dropped, flexural strength has dropped about 7MPa, and amplitude is bigger.
It can be seen that, for left side high frequency region spectral line in oblateness, right side low frequency range is in aplysia punctata, is belonged to from Fig. 3, Fig. 4, Fig. 5
In quasi- Randles situations, curve is handled by Randles curves, using software, by standard Randles curves circuit into
Row fitting, and the capacitance (C) in circuit is replaced with normal phase angle original paper (Q), the circuit data being fitted from software, in conjunction with
Randles situations do map analysis method, can read the Rct=19.0K Ω of comparative example 3, the Rct=of embodiment 1 and embodiment 2
30.4K Ω, Rct=41.4K Ω, it can be seen that the resistivity of embodiment 2 rises 117% compared with comparative example 3, compared in embodiment 2
Rise 36%.
Both sides performance is combined, this high resistance ultra-high performance fiber reinforced cementitious composites can be verified and existed
While maintaining good mechanical property, resistivity is effectively promoted, has reached the risk for reducing and electrochemical corrosion occurring.On
Face is described the embodiment of the present invention in conjunction with attached drawing, and but the invention is not limited in above-mentioned embodiment,
The above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are in the present invention
Enlightenment under, without breaking away from the scope protected by the purposes and claims of the present invention, can also make many forms, these
It belongs within the protection of the present invention.
Claims (9)
1. a kind of fiber reinforced cement-based material, which is characterized in that the fiber reinforced cement-based material is according to weight percent
Including following component：Cement 30-32%, flyash 10-13%, coarse sand 10-16%, fine sand 25-33%, silicon ash 4-6%, water 8-
9%, water-reducing agent 1-1.5%, the sum of said components are 100%；The fiber reinforced cement-based material further include steel fibre with it is profound
The volume volume of military rock fiber, the steel fibre is 1%-2%, and the volume volume of the basalt fibre is 0-1%.
2. fiber reinforced cement-based material as described in claim 1, which is characterized in that a diameter of 0.05-0.2mm of steel fibre,
Length is 5-20mm.
3. fiber reinforced cement-based material as described in claim 1, which is characterized in that a diameter of 5-50 of basalt fibre
μm, length 5-15mm.
4. fiber reinforced cement-based material as described in claim 1, which is characterized in that the steel fibre and basalt fibre
Volume ratio is 1：1.
5. fiber reinforced cement-based material as described in claim 1, which is characterized in that the sand is the commercially available river sand of screening,
Coarse sand grain size is in 0.6-1.25mm, and fine sand grain size is in 0-0.6mm.
6. fiber reinforced cement-based material as described in claim 1, which is characterized in that cement is 52.5 cement of silicate.
7. fiber reinforced cement-based material as described in claim 1, which is characterized in that flyash is level-one flyash.
8. fiber reinforced cement-based material as described in claim 1, which is characterized in that water-reducing agent is the efficient diminishing of polycarboxylic acids
Agent, solid content 20%.
9. the preparation method of fiber reinforced cement-based material as described in claim 1, which is characterized in that weigh original in mass ratio
First 30-60s is mixed in cement, flyash, silicon ash by material；Then coarse sand and fine sand are poured into the powder mixed, are stirred
Mix 30-60s；The water of water-reducing agent and 80% is mixed again and is poured into material, remaining water, stirring to powder is added after stirring 10-20s
Material is slurried；Then standard mortar whipping procedure, stirring are pressed；Basalt fibre is poured into after finally slowly equably first pouring into steel fibre
Dimension, stir makes fiber and slurry be uniformly mixed slowly, and pours into mold molding.
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| CN201810500926.5A CN108658536B (en) | 2018-05-23 | 2018-05-23 | Fiber-reinforced cement-based material and preparation method thereof |
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| CN201810500926.5A CN108658536B (en) | 2018-05-23 | 2018-05-23 | Fiber-reinforced cement-based material and preparation method thereof |
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| CN108658536A true CN108658536A (en) | 2018-10-16 |
| CN108658536B CN108658536B (en) | 2020-12-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281393A (en) * | 2019-07-08 | 2019-09-27 | 黄贺明 | A kind of ultra-high performance concrete frequency conversion type stirring technique |
| CN112851270A (en) * | 2021-03-24 | 2021-05-28 | 中铁二院重庆勘察设计研究院有限责任公司 | Steel fiber and basalt fiber double-doped colorful ultra-high performance concrete and preparation method thereof |
| CN114624113A (en) * | 2022-03-15 | 2022-06-14 | 济南大学 | Basalt-steel fiber high-performance cement-based composite material and preparation test method |
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| JPS6442345A (en) * | 1987-08-05 | 1989-02-14 | Taisei Corp | Slurry for producing fiber reinforced cement mortar or concrete and its production |
| CN102079647A (en) * | 2010-11-30 | 2011-06-01 | 南京理工大学 | Basalt fiber reinforced cement matrix composite and preparation method thereof |
| KR20120077431A (en) * | 2010-12-30 | 2012-07-10 | 코오롱글로벌 주식회사 | A fiber reinforced concrete for floor slab |
| CN103508713A (en) * | 2013-09-03 | 2014-01-15 | 北京交通大学 | Basalt fiber-reinforced active powder concrete and preparation method thereof |
| KR20160144058A (en) * | 2015-06-08 | 2016-12-16 | 한국건설기술연구원 | Ultra-high performance concrete for mixing micro basalt fiber and macro steel fiber, and manufacturing method for the same |
| CN107010896A (en) * | 2017-04-20 | 2017-08-04 | 福州大学 | A kind of regeneration concrete for filling be chopped basalt fibre and regenerated coarse aggregate |
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| JPS6442345A (en) * | 1987-08-05 | 1989-02-14 | Taisei Corp | Slurry for producing fiber reinforced cement mortar or concrete and its production |
| CN102079647A (en) * | 2010-11-30 | 2011-06-01 | 南京理工大学 | Basalt fiber reinforced cement matrix composite and preparation method thereof |
| KR20120077431A (en) * | 2010-12-30 | 2012-07-10 | 코오롱글로벌 주식회사 | A fiber reinforced concrete for floor slab |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281393A (en) * | 2019-07-08 | 2019-09-27 | 黄贺明 | A kind of ultra-high performance concrete frequency conversion type stirring technique |
| CN112851270A (en) * | 2021-03-24 | 2021-05-28 | 中铁二院重庆勘察设计研究院有限责任公司 | Steel fiber and basalt fiber double-doped colorful ultra-high performance concrete and preparation method thereof |
| CN114624113A (en) * | 2022-03-15 | 2022-06-14 | 济南大学 | Basalt-steel fiber high-performance cement-based composite material and preparation test method |
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|---|---|
| CN108658536B (en) | 2020-12-29 |
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