CN110183181A - Preparation method of modified cement-based composite material - Google Patents
Preparation method of modified cement-based composite material Download PDFInfo
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- CN110183181A CN110183181A CN201910478014.7A CN201910478014A CN110183181A CN 110183181 A CN110183181 A CN 110183181A CN 201910478014 A CN201910478014 A CN 201910478014A CN 110183181 A CN110183181 A CN 110183181A
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- 239000004568 cement Substances 0.000 title claims abstract description 95
- 239000002131 composite material Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 23
- 239000011083 cement mortar Substances 0.000 claims abstract description 21
- 238000005266 casting Methods 0.000 claims abstract description 10
- 238000007865 diluting Methods 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 25
- 229910052710 silicon Inorganic materials 0.000 claims description 25
- 239000010703 silicon Substances 0.000 claims description 25
- 239000002956 ash Substances 0.000 claims description 24
- 229920005646 polycarboxylate Polymers 0.000 claims description 21
- 239000012895 dilution Substances 0.000 claims description 19
- 238000010790 dilution Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 15
- 239000004570 mortar (masonry) Substances 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 10
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 claims 1
- 238000009210 therapy by ultrasound Methods 0.000 abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000003085 diluting agent Substances 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 2
- 229910021487 silica fume Inorganic materials 0.000 abstract 2
- 239000000463 material Substances 0.000 description 7
- 239000011398 Portland cement Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010348 incorporation Methods 0.000 description 4
- 239000002086 nanomaterial Substances 0.000 description 3
- 238000005411 Van der Waals force Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000002742 anti-folding effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Classifications
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/024—Graphite
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a modified cement-based composite material which comprises the following components in parts by weight: 360-480 parts of cement, 200-300 parts of water, 0.08-0.5 part of graphene oxide, 0.5-5 parts of polycarboxylic acid water reducing agent, 10-100 parts of silica fume and 1300-1400 parts of standard sand. Diluting graphene oxide with water, adding a polycarboxylic acid water reducing agent while stirring, performing ultrasonic treatment to obtain a graphene oxide diluent, adding silica fume, and uniformly stirring to obtain a mixed diluent; stirring the cement at a low speed for 20-40s, adding the mixed diluent, continuously stirring at a low speed for 100-150s, finally stirring at a high speed for 100-150s to obtain cement mortar, casting the cement mortar in a mould, and demoulding after forming to obtain the cement mortar. The preparation method is simple, the raw materials are easy to obtain, and the prepared modified cement-based composite material has excellent compressive and flexural strength, good toughness and good working performance.
Description
Technical field
The present invention relates to a kind of modified cement-based composite material and preparation methods, belong to building material technical field.
Background technique
In current architecture production, cement-base composite material is most popular cementitious material, including cement
Slurry, mortar, mixing material etc..However, low brittleness, fissility, low tenacity and the low-intensity of cement-base composite material at
The problem of to pay close attention to for a long time, this is also always the main reason for leading to its usability difference and high maintenance cost.Currently, improving cement
The common method of sill mechanical property and durability includes: that the incorporation of reinforcing material, additive use and reduce the ratio of mud.Mesh
Before, the attention of Concrete Industry has been caused using nano material in cement-base composite material.
Nano material is generally divided into according to its size or pattern: zero dimension, peacekeeping two dimension.Due to zero dimensional nanometer materials major diameter
It is relatively low, and be difficult to prevent due to nanoscale crackle and lead to the micro-crack generated, the strong of cement-based material can not be improved
Degree.However, monodimension nanometer material such as carbon nanotube Van der Waals force with higher, they can interact with hydrolysis product of cement
Form bulk material.Two-dimension nano materials (such as graphene and graphene oxide), not only there is the suction similar to monodimension nanometer material
Attached power, while the carbon atom of SP2 hydridization brings excellent physicochemical property to graphene.Graphene oxide (GO) is by hydrophily
Graphite composition layer structure, carry-OH and-CH (O) CH- functional group on GO basal plane ,-C=O- and-COOH are located at simultaneously
Sheet edge.Since these activity can roll into a ball, GO is easily stabilized in water.The elasticity modulus of GO and with compression strength it is respectively
32GP and 130MP, and can largely be synthesized from cheap powdered graphite.
Has the research that GO is mixed into cement in the prior art, for example, Lv et al. shows in cement paste and mortar
Bending and compressive strength, working performance and transport performance can be improved in incorporation GO, such as water absorption rate and chloride-penetration resistance rate.But this
A research has not focused on dispersibility of the GO in cement, and the preferable GO of dispersibility can improve cement performance, however GO
It can be moved freely in fresh paste, the higher Van der Waals force of GO itself can allow them to attract each other, and generate defect to reunite
And micro-crack.GO and cement powder are mixed in addition, generalling use dry-mixed mode at present, then added water and stirred, thing
Also it is difficult to accomplish GO being uniformly distributed in cement-based material in this way in reality.
The common method for improving GO dispersibility at present is ultrasonic wave mixing after activating agent is added, although this method can be
Preferable dispersibility is obtained in water, but is easy to assemble again in cement slurry.It is therefore desirable to the water after incorporation GO
Cement-based composite material is further modified.
Summary of the invention
It is an object of the invention to solve, the generally existing tensile strength of cement-base composite material in the prior art is low, cracking resistance
The deficiencies of performance is poor, brittleness is significant provides a kind of modified cement-based composite material, tough with excellent pressure-proof and snap-resistent intensity
Property it is good, have good working performance.
Another object of the present invention is to provide the preparation methods of above-mentioned cement-base composite material.
Technical solution
A kind of modified cement-based composite material, the component including following parts by weight: 360-480 parts of cement, 200-300 parts
Water, 0.08-0.5 parts of graphene oxides, 0.5-5 parts of polycarboxylate water-reducers, 10-100 parts of silicon ashes, 1300-1400 parts of normal sands.
Further, the modified cement-based composite material includes the component of following parts by weight: 405 parts of cement, 225 parts of water,
0.14 part of graphene oxide, 1.2 parts of polycarboxylate water-reducers, 45 parts of silicon ashes, 1350 parts of normal sands.
Further, the cement is 52.5 ordinary portland cements.
Further, the graphene oxide diameter is at 2-10 μm.
Further, the average grain diameter of the silicon ash is 0.1-0.3 μm.
The preparation method of above-mentioned modified cement-based composite material, includes the following steps:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer is then added while stirring, be ultrasonically treated 5-30min,
Obtain graphene oxide dilution；
(2) silicon ash is added into graphene oxide dilution, is uniformly mixed, obtain mixed diluting liquid；
(3) 20-40s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, be subsequently added into mixed
Dilution is closed, continuation stirs at low speed 100-150s under the revolving speed of 60-70r/min, then under the revolving speed of 140-150r/min
After high-speed stirred 100-150s, cement mortar is obtained, immediately in a mold by cement mortar casting, demoulding is after molding to get changing
Property cement-base composite material.
In step (1), the frequency of ultrasonic treatment is 40KHz.
In step (3), molding condition are as follows: 25 DEG C of temperature, humidity 100%.
Beneficial effects of the present invention: the present invention provides a kind of modified cement-based composite materials, and the present invention is in cement matrix
Middle incorporation GO and silicon ash, and optimize the dosage of GO and silicon ash, the controllable hydrated cementitious crystallization of GO, to generate more C-S-H
The addition of gel, silicon ash then improves the boundary strength between GO and matrix, to improve the pressure-proof and snap-resistent intensity of cement.The present invention
Preparation method is simple, and raw material is easy to get, and modified cement-based composite material obtained has excellent pressure-proof and snap-resistent intensity, and toughness
It is good, there is good working performance.
Detailed description of the invention
Fig. 1 is SEM figure when modified cement-based composite material made from embodiment 2 conserves 3d；
Fig. 2 is SEM figure when modified cement-based composite material made from embodiment 2 conserves 28d.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
In following embodiments, the cement used is 52.5 ordinary portland cement, by Jiangnan little Ye Tian Cement Co., Ltd
It provides；The graphene oxide diameter used is 2-10 μm；The polycarboxylate water-reducer used is for ASTM C494F type, water-reducing rate
25.1%；The silicon ash average grain diameter used is provided for 0.1-0.3 μm by the remote silicon materials Co., Ltd in Gansu three；Accepted standard
Sand SiO2It is greater than 98% natural siliceous sand for content, is provided by Xiamen Aisiou Standard Sand Co., Ltd.But it is not limited to this.
Embodiment 1
A kind of modified cement-based composite material, the component including following parts by weight: 427.5 parts of cement, 225 parts of water, 0.14
Part graphene oxide, 1.2 parts of polycarboxylate water-reducers, 22.5 parts of silicon ashes, 1350 parts of normal sands.
The preparation method of above-mentioned modified cement-based composite material:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer, 40KHz ultrasonic treatment is then added while stirring
10min obtains graphene oxide dilution；
(2) silicon ash is added into graphene oxide dilution, is uniformly mixed, obtain mixed diluting liquid；
(3) 30s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, it is dilute is subsequently added into mixing
Liquid is released, continuation stirs at low speed 120s under the revolving speed of 60-70r/min, then the high-speed stirred under the revolving speed of 140-150r/min
After 120s, cement mortar is obtained, immediately in a mold by cement mortar casting, (25 DEG C of temperature, humidity 100% is lower to place for molding
It is demoulded after 1d) to get modified cement-based composite material, is soaked in water and conserves 28d.
Embodiment 2
A kind of modified cement-based composite material, the component including following parts by weight: 405 parts of cement, 225 parts of water, 0.14 part
Graphene oxide, 1.2 parts of polycarboxylate water-reducers, 45 parts of silicon ashes, 1350 parts of normal sands.
The preparation method of above-mentioned modified cement-based composite material:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer, 40KHz ultrasonic treatment is then added while stirring
10min obtains graphene oxide dilution；
(2) silicon ash is added into graphene oxide dilution, is uniformly mixed, obtain mixed diluting liquid；
(3) 30s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, it is dilute is subsequently added into mixing
Liquid is released, continuation stirs at low speed 120s under the revolving speed of 60-70r/min, then the high-speed stirred under the revolving speed of 140-150r/min
After 120s, cement mortar is obtained, immediately in a mold by cement mortar casting, (25 DEG C of temperature, humidity 100% is lower to place for molding
It is demoulded after 1d) to get modified cement-based composite material, is soaked in water and conserves 28d.
SEM figure made from the present embodiment when modified cement-based composite material maintenance 3d is shown in Fig. 1, conserves SEM figure when 28d
See Fig. 2, it can be seen that graphene oxide aggregate is mechanically separated into lamellar structure, and explanation can be uniformly dispersed in cement base
In body.
Embodiment 3
A kind of modified cement-based composite material, the component including following parts by weight: 382.5 parts of cement, 225 parts of water, 0.14
Part graphene oxide, 1.2 parts of polycarboxylate water-reducers, 67.5 parts of silicon ashes, 1350 parts of normal sands.
The preparation method of above-mentioned modified cement-based composite material:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer, 40KHz ultrasonic treatment is then added while stirring
10min obtains graphene oxide dilution；
(2) silicon ash is added into graphene oxide dilution, is uniformly mixed, obtain mixed diluting liquid；
(3) 30s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, it is dilute is subsequently added into mixing
Liquid is released, continuation stirs at low speed 120s under the revolving speed of 60-70r/min, then the high-speed stirred under the revolving speed of 140-150r/min
After 120s, cement mortar is obtained, immediately in a mold by cement mortar casting, (25 DEG C of temperature, humidity 100% is lower to place for molding
It is demoulded after 1d) to get modified cement-based composite material, is soaked in water and conserves 28d.
Embodiment 4
A kind of modified cement-based composite material, the component including following parts by weight: 360 parts of cement, 225 parts of water, 0.09 part
Graphene oxide, 1.2 parts of polycarboxylate water-reducers, 90 parts of silicon ashes, 1350 parts of normal sands.
The preparation method of above-mentioned modified cement-based composite material:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer, 40KHz ultrasonic treatment is then added while stirring
10min obtains graphene oxide dilution；
(2) silicon ash is added into graphene oxide dilution, is uniformly mixed, obtain mixed diluting liquid；
(3) 30s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, it is dilute is subsequently added into mixing
Liquid is released, continuation stirs at low speed 120s under the revolving speed of 60-70r/min, then the high-speed stirred under the revolving speed of 140-150r/min
After 120s, cement mortar is obtained, immediately in a mold by cement mortar casting, (25 DEG C of temperature, humidity 100% is lower to place for molding
It is demoulded after 1d) to get modified cement-based composite material, is soaked in water and conserves 28d.
Embodiment 5
A kind of modified cement-based composite material, the component including following parts by weight: 450 parts of cement, 225 parts of water, 0.09 part
Graphene oxide, 1.2 parts of polycarboxylate water-reducers, 45 parts of silicon ashes, 1350 parts of normal sands.
The preparation method of above-mentioned modified cement-based composite material:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer, 40KHz ultrasonic treatment is then added while stirring
10min obtains graphene oxide dilution；
(2) silicon ash is added into graphene oxide dilution, is uniformly mixed, obtain mixed diluting liquid；
(3) 30s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, it is dilute is subsequently added into mixing
Liquid is released, continuation stirs at low speed 120s under the revolving speed of 60-70r/min, then the high-speed stirred under the revolving speed of 140-150r/min
After 120s, cement mortar is obtained, immediately in a mold by cement mortar casting, (25 DEG C of temperature, humidity 100% is lower to place for molding
It is demoulded after 1d) to get modified cement-based composite material, is soaked in water and conserves 28d.
Embodiment 6
A kind of modified cement-based composite material, the component including following parts by weight: 382.5 parts of cement, 225 parts of water, 0.23
Part graphene oxide, 1.2 parts of polycarboxylate water-reducers, 67.5 parts of silicon ashes, 1350 parts of normal sands.
The preparation method of above-mentioned modified cement-based composite material:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer, 40KHz ultrasonic treatment is then added while stirring
10min obtains graphene oxide dilution；
(2) silicon ash is added into graphene oxide dilution, is uniformly mixed, obtain mixed diluting liquid；
(3) 30s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, it is dilute is subsequently added into mixing
Liquid is released, continuation stirs at low speed 120s under the revolving speed of 60-70r/min, then the high-speed stirred under the revolving speed of 140-150r/min
After 120s, cement mortar is obtained, immediately in a mold by cement mortar casting, (25 DEG C of temperature, humidity 100% is lower to place for molding
It is demoulded after 1d) to get modified cement-based composite material, is soaked in water and conserves 28d.
Comparative example
A kind of modified cement-based composite material, the component including following parts by weight: 450 parts of cement, 225 parts of water, 0.14 part
Graphene oxide, 1.4 parts of polycarboxylate water-reducers, 1350 parts of normal sands.
The preparation method of above-mentioned modified cement-based composite material:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer, 40KHz ultrasonic treatment is then added while stirring
10min obtains graphene oxide dilution；
(2) 30s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, is subsequently added into oxidation stone
Black alkene dilution, continuation stir at low speed 120s under the revolving speed of 60-70r/min, then high under the revolving speed of 140-150r/min
After speed stirring 120s, cement mortar is obtained, immediately in a mold by cement mortar casting, molding (25 DEG C of temperature, humidity 100%
Lower placement 1d) it is demoulded afterwards to get modified cement-based composite material, it is soaked in water and conserves 28d.
Performance test:
1. modified cement-based composite material made from embodiment 1-6 and comparative example is carried out to the test of anti-folding and anti-pressing performance,
And test comparison is carried out with 52.5 ordinary portland cements, test method refers to GB/T 17671-1999, the results are shown in Table 1:
Table 1
As can be seen from Table 1, modified cement-based composite material of the invention has good flexural strength and compression strength,
Better than modified cement-based composite material made from 52.5 ordinary portland cements and comparative example.
2. modified cement-based composite material made from embodiment 1-6 and comparative example to be carried out to the test of working performance, test
Method refers to GB/T 1346-2011 " cement normal consistency water consumption, setting time, the stability method of inspection ", the results are shown in Table 2:
Table 2
The modified cement-based composite material work performance made from the embodiment of the present invention it can be seen from the test result of table 2
It is excellent.
3. using the hole of modified cement-based composite material made from Poremaster GT-6.0 mercury injection apparatus testing example 2
Gap rate, and compared with 52.5 ordinary portland cements, it the results are shown in Table 3:
Table 3
As can be seen that overall porosity of the modified cement-based composite material of the embodiment of the present invention 2 in 1d, 3d, 7d, 28d
Respectively 22.57%, 17.41%, 17.28%, 9.68%.With striaght cement compare, respectively reduce 4.61%, 7.73%,
10.64%, 7.52%, this illustrates that intrinsic silicon hole tails off, and cement compactibility is got higher.
Claims (8)
1. a kind of modified cement-based composite material, which is characterized in that the component including following parts by weight: 360-480 parts of cement,
200-300 parts of water, 0.08-0.5 parts of graphene oxides, 0.5-5 parts of polycarboxylate water-reducers, 10-100 parts of silicon ashes, 1300-1400 parts
Normal sand.
2. modified cement-based composite material as described in claim 1, which is characterized in that the modified cement-based composite material includes
The component of following parts by weight: 405 parts of cement, 225 parts of water, 0.14 part of graphene oxide, 1.2 parts of polycarboxylate water-reducers, 45 parts of silicon
Ash, 1350 parts of normal sands.
3. modified cement-based composite material as described in claim 1, which is characterized in that the cement is 52.5 normal silicate water
Mud.
4. modified cement-based composite material as described in claim 1, which is characterized in that the graphene oxide diameter is 2-10 μ
m。
5. the modified cement-based composite material as described in any one of Claims 1-4, which is characterized in that the average grain of the silicon ash
Diameter is 0.1-0.3 μm.
6. the preparation method of any one of claim 1 to the 5 modified cement-based composite material, which is characterized in that including as follows
Step:
(1) graphene oxide is diluted with water, polycarboxylate water-reducer is then added while stirring, be ultrasonically treated 5-30min, obtain
Graphene oxide dilution；
(2) silicon ash is added into graphene oxide dilution, is uniformly mixed, obtain mixed diluting liquid；
(3) 20-40s is stirred at low speed under the revolving speed of 60-70r/min to cement using mortar mixer, it is dilute is subsequently added into mixing
Liquid is released, continuation stirs at low speed 100-150s under the revolving speed of 60-70r/min, then the high speed under the revolving speed of 140-150r/min
After stirring 100-150s, cement mortar is obtained, immediately in a mold by cement mortar casting, demoulding is after molding to get modified water
Cement-based composite material.
7. the preparation method of modified cement-based composite material as claimed in claim 6, which is characterized in that in step (1), at ultrasound
The frequency of reason is 40KHz.
8. the preparation method of modified cement-based composite material as claimed in claims 6 or 7, which is characterized in that in step (3), at
The condition of type are as follows: 25 DEG C of temperature, humidity 100%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608051A (en) * | 2020-12-23 | 2021-04-06 | 工科思维技术(深圳)有限公司 | Method for preparing cement-based composite material by utilizing surface-modified silica fume-graphene oxide mixture |
| CN114085058A (en) * | 2021-11-03 | 2022-02-25 | 深圳大学 | Graphene oxide composite cement-based cementing material with high chloride ion curing capacity and preparation method thereof |
| CN115231860A (en) * | 2022-06-22 | 2022-10-25 | 桂林理工大学 | Cement-based material of modified graphene and preparation method thereof |
| CN116462458A (en) * | 2023-04-21 | 2023-07-21 | 苏州固韧纳米材料技术有限公司 | Asphalt modified cement-based composite material and preparation method and application thereof |
| CN117819918A (en) * | 2024-01-10 | 2024-04-05 | 东南大学 | Nano reinforced cement-based composite material without affecting dispersity of nano material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108863225A (en) * | 2018-07-26 | 2018-11-23 | 广东复特新型材料科技有限公司 | A kind of polychromy mortar |
| CN109400038A (en) * | 2018-11-28 | 2019-03-01 | 广西绿色水泥产业工程院有限公司 | A kind of high resistance to corrosion low-heat cement material and preparation method thereof containing graphene oxide |
-
2019
- 2019-06-03 CN CN201910478014.7A patent/CN110183181A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108863225A (en) * | 2018-07-26 | 2018-11-23 | 广东复特新型材料科技有限公司 | A kind of polychromy mortar |
| CN109400038A (en) * | 2018-11-28 | 2019-03-01 | 广西绿色水泥产业工程院有限公司 | A kind of high resistance to corrosion low-heat cement material and preparation method thereof containing graphene oxide |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608051A (en) * | 2020-12-23 | 2021-04-06 | 工科思维技术(深圳)有限公司 | Method for preparing cement-based composite material by utilizing surface-modified silica fume-graphene oxide mixture |
| CN112608051B (en) * | 2020-12-23 | 2022-09-09 | 工科思维技术(深圳)有限公司 | Method for preparing cement-based composite material by utilizing surface-modified silica fume-graphene oxide mixture |
| CN114085058A (en) * | 2021-11-03 | 2022-02-25 | 深圳大学 | Graphene oxide composite cement-based cementing material with high chloride ion curing capacity and preparation method thereof |
| CN115231860A (en) * | 2022-06-22 | 2022-10-25 | 桂林理工大学 | Cement-based material of modified graphene and preparation method thereof |
| CN116462458A (en) * | 2023-04-21 | 2023-07-21 | 苏州固韧纳米材料技术有限公司 | Asphalt modified cement-based composite material and preparation method and application thereof |
| CN117819918A (en) * | 2024-01-10 | 2024-04-05 | 东南大学 | Nano reinforced cement-based composite material without affecting dispersity of nano material and preparation method thereof |
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