CN108358564A - A kind of high ductility cement-base composite material and preparation method thereof - Google Patents
A kind of high ductility cement-base composite material and preparation method thereof Download PDFInfo
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- CN108358564A CN108358564A CN201810449462.XA CN201810449462A CN108358564A CN 108358564 A CN108358564 A CN 108358564A CN 201810449462 A CN201810449462 A CN 201810449462A CN 108358564 A CN108358564 A CN 108358564A
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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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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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)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of high ductility cement-base composite materials and preparation method thereof, are made of the cement, flyash, clean thin river sand, rubber powder, fiber, water-reducing agent, latex powder, accelerator and the water that centainly match.The high ductility cement-base composite material of the present invention, because having higher energy to failure and ultimate tensile strength, outstanding anti-crack ability, adjustable four-point bending toughness index, rational compression strength, the gunite concrete material that can be used in deep coal mine roadway support structural system can be used for the gunite concrete material in railway engineering, highway engineering mountain tunnel especially large deformation tunnel and serious unsymmetrial loading tunnel preliminary bracing.
Description
Technical field
The present invention relates to civil engineering material and preparing technical fields, more particularly to a kind of high ductility cement base composite wood
Material and preparation method thereof.
Background technology
The coal mine deep well tunnel in China generally uses bolt-mesh-spurting supporting, Bolt net and jet+cable bolting, Bolt net and jet+beam+anchor
The combined supportings mode such as rope supporting.Gunite concrete employed in these support patterns is by cement, coarse-fine aggregate, water, rapid hardening
Agent forms, and is commonly injected with form in dry spray, tide spray and wet shot etc. three.The major defect of this traditional gunite concrete is
Tensile strength is low, ductility is small, poor toughness etc., in the Bracing Process to the deep-well tunnel country rock with Nonlinear Large Deformation feature
In, shotcrete layer and country rock occur not coupling in rigidity, deformation, cannot make the abundant release of country rock, lead to local spray-up
There is stress concentration, induces phenomena such as spray-up occurs to early cracking, falls off, weaken or even lose the closing to country rock and surface
Support action, due to cracking or falling off so that the globality of supporting construction is lost, and the effect of combined supporting can not be formed.Railway
Weak, broken, joints development the tunnel of the mountain tunnel of engineering, highway engineering etc., especially country rock and serious unsymmetrial loading tunnel, are opened
There is Nonlinear Large Deformation feature, conventional spray concrete often results in just because of the compatibility of deformation wretched insufficiency with scar after digging
Phase branch sheath cracking, staggered floor are even whole to fall off, and the closing of preliminary bracing and protective function is made to can not achieve.Therefore, be badly in need of be
Deep-well tunnel supporting and large deformation tunnel, which are developed, a kind of meets that intensity and ductility is high, material of good toughness replaces normal concrete spray
Layer is used as supporting construction, improves the reliability of supporting construction, enhances safety.
Invention content
Present invention aims at the defect for gunite concrete material, a kind of energy to failure is provided and ultimate tensile strength is high,
Anti-crack ability is strong, and four-point bending toughness index is adjustable, and compression strength meets preliminary bracing requirement, excellent with scar compatibility of deformation
High ductility cement-base composite material and preparation method.
The present invention to achieve the above object, adopts the following technical scheme that:A kind of high ductility cement-base composite material, by water
Mud, flyash, clean thin river sand, rubber powder, fiber, water-reducing agent, latex powder, accelerator and water composition;The cement unit bodies
Product dosage is 420 ~ 630Kg/m3, the flyash Amount per unitvolume is 420 ~ 630Kg/m3, the clean thin river sand unit bodies
Product dosage is 517 ~ 700Kg/m3, the rubber powder Amount per unitvolume is 34 ~ 66Kg/m3, the fiber Amount per unitvolume is
31~44.2Kg/m3, the latex powder Amount per unitvolume is 6.3 ~ 8.4Kg/m3, the water-reducing agent Amount per unitvolume be 2.1 ~
10.5Kg/m3, the accelerator is that unit volumetric usage is 63 ~ 84Kg/m3, water-cement ratio 0.36, the glue sand when fiber is PVA
Than being 0.49, when fiber is PP, cement mortar rate is 0.70;Rubber powder is incorporated into cement base as the substituent of the clean river sand in part
In composite material.
Further, the cement is Portland cement, strength grade 42.5MPa;Flyash is I grades of fine coal
Ash;Clean thin river sand is that maximum particle diameter is no more than 1.18mm, fineness modulus 1.0, the common river sand washed with water;Rubber powder is 40
The not surface treated rubber powder of mesh of mesh ~ 80;Latex powder is dispersible ethylene-vinyl acetate copolymer (EVA);Water-reducing agent is
Polycarboxylate dehydragent, solid content 20%, water-reducing rate are 20%~30%;Accelerator is alkali-free liquid accelerator;Water is clean
Drinking water or tap water.
Further, the fiber is polyvinyl alcohol(PVA)Fiber or polypropylene(PP)Fiber, the polyvinyl alcohol
(PVA)1200 ~ 1500MPa of fibre tensile strength, 39 μm of equivalent diameter, density 1.3g/cm3, Amount per unitvolume be 18.3 ~
26.0Kg/m3;The polypropylene(PP)Fiber, 400 ~ 650MPa of tensile strength, 48 μm of equivalent diameter, density 0.91g/cm3, single
Position volumetric usage is 12.7 ~ 18.2Kg/m3。
A kind of preparation method of high ductility cement-base composite material, includes the following steps:By by load weighted cement, powder
Coal ash, rubber powder, latex powder, clean thin river sand are poured into blender together, and mixing 2 ~ 3min of dry mixing is equal to a variety of materials mixing
It is even;Then load weighted water and polycarboxylate dehydragent are uniformly mixed, mixed solution is poured into blender, stirring at low speed 3 ~
4 min to slurry being capable of Uniform Flow;It is slowly added to fiber while stirring at low speed, 5 ~ 6 are quickly stirred after fiber is added
Min obtains fresh paste;When in use by load weighted accelerator injection apparatus nozzle rear end by negative pressure of vacuum sucking with it is new
Slurry mixing is mixed, the high ductility cement-base composite material of the present invention is obtained and sprays use.
Compared with prior art, what the present invention had has the beneficial effect that:The high ductility cement-base composite material of the present invention, because
With higher energy to failure and ultimate tensile strength, outstanding anti-crack ability, adjustable four-point bending toughness index reasonably resists
Compressive Strength, the gunite concrete material that can be used in deep coal mine roadway support structural system can be used for railway engineering, highway work
The gunite concrete material in journey mountain tunnel especially large deformation tunnel and serious unsymmetrial loading tunnel preliminary bracing.
Specific implementation mode
With reference to specific embodiment, the present invention is described further.
Embodiment 1:A kind of high ductility cement-base composite material, by cement, flyash, clean thin river sand, rubber powder,
Fiber, water-reducing agent, latex powder, accelerator and water composition;The cement Amount per unitvolume is 520Kg/m3, the flyash list
Position volumetric usage is 520Kg/m3, the clean thin river sand Amount per unitvolume is 610Kg/m3, the rubber powder unit volume use
Amount is 50Kg/m3, the fiber is polyvinyl alcohol(PVA)Fiber, Amount per unitvolume 38Kg/m3, the latex powder unit bodies
Product dosage is 7.4Kg/m3, the water-reducing agent Amount per unitvolume is 6Kg/m3, the accelerator is that unit volumetric usage is
74Kg/m3, water-cement ratio 0.36, cement mortar rate 0.49.
Embodiment 2:A kind of high ductility cement-base composite material, by cement, flyash, clean thin river sand, rubber powder,
Fiber, water-reducing agent, latex powder, accelerator and water composition;The cement Amount per unitvolume is 420Kg/m3, the flyash list
Position volumetric usage is 420Kg/m3, the clean thin river sand Amount per unitvolume is 517Kg/m3, the rubber powder unit volume use
Amount is 34Kg/m3, the fiber is polypropylene(PP)Fiber, Amount per unitvolume 31Kg/m3, the latex powder unit volume
Dosage is 6.3Kg/m3, the water-reducing agent Amount per unitvolume is 2.1Kg/m3, the accelerator is that unit volumetric usage is
63Kg/m3, water-cement ratio 0.36, cement mortar rate 0.70.
Embodiment 3:A kind of high ductility cement-base composite material, by cement, flyash, clean thin river sand, rubber powder,
Fiber, water-reducing agent, latex powder, accelerator and water composition;The cement Amount per unitvolume is 630Kg/m3, the flyash list
Position volumetric usage is 630Kg/m3, the clean thin river sand Amount per unitvolume is 700Kg/m3, the rubber powder unit volume use
Amount is 66Kg/m3, the fiber is polyvinyl alcohol(PVA)Fiber, Amount per unitvolume 44.2Kg/m3, the latex powder unit
Volumetric usage is 8.4Kg/m3, the water-reducing agent Amount per unitvolume is 10.5Kg/m3, the accelerator is unit volumetric usage
For 84Kg/m3, water-cement ratio 0.36, cement mortar rate 0.49.
Embodiment 4:A kind of high ductility cement-base composite material, by cement, flyash, clean thin river sand, rubber powder,
Fiber, water-reducing agent, latex powder, accelerator and water composition;The cement Amount per unitvolume is 630Kg/m3, the flyash list
Position volumetric usage is 420Kg/m3, the clean thin river sand Amount per unitvolume is 700Kg/m3, the rubber powder unit volume use
Amount is 34Kg/m3, the fiber is polyvinyl alcohol(PVA)Fiber, Amount per unitvolume 44.2Kg/m3, the latex powder unit
Volumetric usage is 6.3Kg/m3, the water-reducing agent Amount per unitvolume is 10.5Kg/m3, the accelerator is unit volumetric usage
For 63Kg/m3, water-cement ratio 0.36, cement mortar rate 0.49.
Embodiment 5:A kind of high ductility cement-base composite material, by cement, flyash, clean thin river sand, rubber powder,
Fiber, water-reducing agent, latex powder, accelerator and water composition;The cement Amount per unitvolume is 600Kg/m3, the flyash list
Position volumetric usage is 500Kg/m3, the clean thin river sand Amount per unitvolume is 550Kg/m3, the rubber powder unit volume use
Amount is 60Kg/m3, the fiber is polypropylene(PP)Fiber, Amount per unitvolume 40Kg/m3, the latex powder unit volume
Dosage is 7Kg/m3, the water-reducing agent Amount per unitvolume is 8Kg/m3, the accelerator is that unit volumetric usage is 70Kg/m3,
Water-cement ratio is 0.36, cement mortar rate 0.70
In above-described embodiment 1-5, cement is Portland cement, strength grade 42.5MPa;Flyash is I grades of flyash,
Main chemical compositions are SiO2、Al2O3、Fe2O3、CaO、MgO、SO3、Na2O、K2O;Clean thin river sand is no more than for maximum particle diameter
1.18mm, fineness modulus 1.0, the common river sand washed with water;Rubber powder is the not surface treated rubber powder of mesh of 40 mesh ~ 80;
Fiber is polyvinyl alcohol(PVA)Fiber or polypropylene(PP)Fiber, polyvinyl alcohol(PVA)Fibre tensile strength 1200 ~
1500MPa, 39 μm of equivalent diameter, density 1.3g/cm3;Polypropylene(PP)400 ~ 650MPa of fibre tensile strength, equivalent diameter 48
μm, density 0.91g/cm3;Latex powder is dispersible ethylene-vinyl acetate copolymer (EVA);Water-reducing agent subtracts for polycarboxylate
Aqua, solid content 20%, water-reducing rate are 20%~30%;Accelerator is alkali-free liquid accelerator;Water is for clean drinking water or certainly
Water.
High ductility cement-base composite material described in embodiment 1-5 prepare in use, by will set quality cement,
The materials such as flyash, rubber powder, latex powder, clean thin river sand pour into blender together after weighing, and 2 ~ 3min of mixing dry mixing is extremely
A variety of materials are uniformly mixed;The water for setting quality and high-performance water reducing agent are uniformly mixed, then the mixed solution is poured into and is stirred
It mixes in machine, 3 ~ 4 min of stirring at low speed to slurry being capable of Uniform Flow;It is slowly added to fiber while stirring at low speed, is added fine
5 ~ 6 min are quickly stirred after dimension;Fresh paste is packed into die trial, smooth out surface after vibratory compaction, form removal after indoor maintenance for 24 hours;
Test specimen is carrying out standard curing(20 ± 2 DEG C, RH > 95%)Under the conditions of conserve 28 days and be made.When for deep-well tunnel or greatly
When deformation tunnel gunite concrete material, accelerator is sucked by negative pressure of vacuum in nozzle rear end and is mixed with fresh paste, is sprayed
Become preliminary bracing material on to scar.
After tested, the compression strength of high ductility cement-base composite material made from above-described embodiment 1-5 be 20.5 ~
30.9MPa, ultimate tensile strength be 0.32% ~ 1.35%, energy to failure be 1.08 ~ 4.93J, four-point bending toughness index be 30.0 ~
108.0。
It should be noted that embodiment described above is only several specific embodiments of the present invention, but can not be because
This is interpreted as the limitation to the scope of the claims of the present invention.For those skilled in the art, think of of the present invention is not being departed from
Several differentiation or improvement made under the premise of road, belong to protection scope of the present invention.
Claims (4)
1. a kind of high ductility cement-base composite material, it is characterised in that:By cement, flyash, clean thin river sand, rubber powder, fibre
Dimension, water-reducing agent, latex powder, accelerator and water composition;The cement Amount per unitvolume is 420 ~ 630Kg/m3, the flyash
Amount per unitvolume is 420 ~ 630Kg/m3, the clean thin river sand Amount per unitvolume is 517 ~ 700Kg/m3, the rubber powder
Amount per unitvolume is 34 ~ 66Kg/m3, the fiber Amount per unitvolume is 31 ~ 44.2Kg/m3, the latex powder unit volume
Dosage is 6.3 ~ 8.4Kg/m3, the water-reducing agent Amount per unitvolume is 2.1 ~ 10.5Kg/m3, the accelerator is unit volume
Dosage is 63 ~ 84Kg/m3;Water-cement ratio is 0.36, and cement mortar rate is 0.49 or 0.70;Glue in the water-cement ratio and cement mortar rate is
The gelling agent being made of cement and flyash, sand are clean thin river sand.
2. a kind of high ductility cement-base composite material according to claim 1, it is characterised in that:The cement is common
Portland cement, strength grade 42.5MPa;Flyash is I grades of flyash;Clean thin river sand is no more than for maximum particle diameter
1.18mm, fineness modulus 1.0, the common river sand washed with water;Rubber powder is the not surface treated rubber powder of mesh of 40 mesh ~ 80;
Latex powder is dispersible ethylene-vinyl acetate copolymer (EVA);Water-reducing agent is polycarboxylate dehydragent, solid content 20%,
Water-reducing rate is 20%~30%;Accelerator is alkali-free liquid accelerator;Water is the drinking water or tap water of cleaning.
3. a kind of high ductility cement-base composite material according to claim 1, it is characterised in that:The fiber is poly- second
Enol(PVA)FiberOrPolypropylene(PP)Fiber, the polyvinyl alcohol(PVA)1200 ~ 1500MPa of fibre tensile strength, equivalent
39 μm of diameter, density 1.3g/cm3, Amount per unitvolume is 18.3 ~ 26.0Kg/m3;The polypropylene(PP)Fiber, tensile strength
400 ~ 650MPa, 48 μm of equivalent diameter, density 0.91g/cm3, Amount per unitvolume is 12.7 ~ 18.2Kg/m3;When fiber is poly-
Vinyl alcohol(PVA)Cement mortar rate is 0.49 when fiber, when fiber is polypropylene(PP)Cement mortar rate is 0.70 when fiber.
4. a kind of preparation method of high ductility cement-base composite material, which is characterized in that include the following steps:By that will weigh
Good cement, flyash, rubber powder, latex powder, clean thin river sand are poured into together in blender, and mixing 2 ~ 3min of dry mixing is to various
Material is uniformly mixed;Then load weighted water and polycarboxylate dehydragent are uniformly mixed, mixed solution are poured into blender,
3 ~ 4 min of stirring at low speed to slurry being capable of Uniform Flow;It is slowly added to fiber while stirring at low speed, is added after fiber quickly
5 ~ 6 min of stirring obtain fresh paste;Load weighted accelerator is passed through into negative pressure of vacuum in injection apparatus nozzle rear end when in use
Sucking is mixed with fresh paste, is obtained the high ductility cement-base composite material of the present invention and is sprayed use.
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109942257A (en) * | 2019-04-24 | 2019-06-28 | 山东省交通规划设计院 | A kind of road superhigh tenacity cement-base composite material and its preparation method and application |
CN110606702A (en) * | 2019-08-28 | 2019-12-24 | 维特国际新材料(武汉)有限公司 | Bridge self-repairing paving method based on cement-based composite material |
CN111362646A (en) * | 2018-12-26 | 2020-07-03 | 江苏苏博特新材料股份有限公司 | Low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and preparation method thereof |
CN111548075A (en) * | 2020-06-11 | 2020-08-18 | 陕西拉发纪新材料科技有限公司 | Guniting material suitable for surface treatment of stone coal mine tunnel and preparation method thereof |
CN112983479A (en) * | 2021-02-23 | 2021-06-18 | 陕西煤业化工技术研究院有限责任公司 | Roadway surrounding rock sealing protection method |
CN113149555A (en) * | 2021-04-21 | 2021-07-23 | 河南省宜居建材科技有限公司 | Sprayed concrete for roadway |
CN113213835A (en) * | 2021-04-28 | 2021-08-06 | 青岛科技大学 | Application of filling material containing tailings and waste tire rubber filaments in yielding support of underground chamber |
CN113620662A (en) * | 2021-08-04 | 2021-11-09 | 业之固工程技术(苏州)有限公司 | Ultrahigh-toughness cement-based composite material |
CN114634338A (en) * | 2022-03-09 | 2022-06-17 | 石河子大学 | High-ductility cement-based composite material for wind-blown sand in desert and preparation method thereof |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111362646A (en) * | 2018-12-26 | 2020-07-03 | 江苏苏博特新材料股份有限公司 | Low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and preparation method thereof |
CN109942257A (en) * | 2019-04-24 | 2019-06-28 | 山东省交通规划设计院 | A kind of road superhigh tenacity cement-base composite material and its preparation method and application |
CN110606702A (en) * | 2019-08-28 | 2019-12-24 | 维特国际新材料(武汉)有限公司 | Bridge self-repairing paving method based on cement-based composite material |
CN111548075A (en) * | 2020-06-11 | 2020-08-18 | 陕西拉发纪新材料科技有限公司 | Guniting material suitable for surface treatment of stone coal mine tunnel and preparation method thereof |
CN112983479A (en) * | 2021-02-23 | 2021-06-18 | 陕西煤业化工技术研究院有限责任公司 | Roadway surrounding rock sealing protection method |
CN113149555A (en) * | 2021-04-21 | 2021-07-23 | 河南省宜居建材科技有限公司 | Sprayed concrete for roadway |
CN113213835A (en) * | 2021-04-28 | 2021-08-06 | 青岛科技大学 | Application of filling material containing tailings and waste tire rubber filaments in yielding support of underground chamber |
CN113620662A (en) * | 2021-08-04 | 2021-11-09 | 业之固工程技术(苏州)有限公司 | Ultrahigh-toughness cement-based composite material |
CN114634338A (en) * | 2022-03-09 | 2022-06-17 | 石河子大学 | High-ductility cement-based composite material for wind-blown sand in desert and preparation method thereof |
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