CN108793858A - A kind of distributed graphene/cementitious composite building mortar of load and preparation method - Google Patents
A kind of distributed graphene/cementitious composite building mortar of load and preparation method Download PDFInfo
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- CN108793858A CN108793858A CN201810651134.8A CN201810651134A CN108793858A CN 108793858 A CN108793858 A CN 108793858A CN 201810651134 A CN201810651134 A CN 201810651134A CN 108793858 A CN108793858 A CN 108793858A
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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
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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
- 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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Abstract
The present invention relates to field of compound material, a kind of distributed graphene/cementitious composite building mortar of load and preparation method are disclosed.Including following preparation process：（1）α-sepiolite powder, graphene oxide are added in hydrochloric acid solution, is ultrasonically treated；（2）Amination molybdenum disulfide is added；（3）Hydrazine hydrate is added, graphene/sepiolite composite material is made；（4）Composite material, grail, water-reducing agent, antifoaming agent, thixotropic lubricant are stirred processing, mixing material is made；（5）Mixing material and cement, water, phosphonate dispersants are mixed, that is, load distributed graphene/cementitious composite building mortar.In composite material produced by the present invention, the sepiolite surface lubrication as graphene carrier is good, avoids the problem of reuniting, while the graphene loaded is uniformly dispersed in cement mortar, it is ensured that enhancing modified effect.
Description
Technical field
The present invention relates to field of compound material, disclose a kind of distributed graphene/cementitious composite building mortar of load and
Preparation method.
Background technology
Cement products is the cement deep processed product having a large capacity and a wide range, due to it have raw material sources it is wide, manufacture craft compared with
Simply, energy consumption is few, and arbitrary shape can be made by design requirement, corrosion-resistant, service life is long, and maintenance cost is few, saves metal
With the particular advantages such as timber, in the engineering constructions such as China town and country, industrial and mining enterprises, agricultural water conservancy and the energy, traffic, communication
To extremely wide use, significant Social benefit and economic benefit is achieved, it has also become indispensable in the development of the national economy
Important building material product.
Cement products has good application property, and cement concrete/mortar of hardening has very high compression strength, but deposits
Tensile strength is low, impact energy force difference, cracking resistance is poor the shortcomings of, and quality problems are increasing and serious in recent years, because
This, adds enhanced material and carries out enhancing improvement to the performance of cement products, become technical way, currently used enhancing
Material mainly has granular pattern, fibrous type, laminate-type etc., wherein graphene to be widely noticed as novel enhanced material in recent years.
At present the derivatives such as graphene or graphene oxide can be used as ideal reinforcing material, and it is new to assign composite material
Function expands the application field of graphene composite material.It is good such as graphene or graphene oxide and cement Related product
It is compound, the mutual supplement with each other's advantages and reinforcement of two kinds of materials may be implemented.Graphene cement-base composite material is in ordinary cement sill
In it is graphene-doped made of a kind of composite material.This material not only has excellent mechanical property, and has centainly
It is electromagnetically shielded effect, it is extremely wide that electromagnetic shielding effect is expected to be used for military or medical building, application prospect.
Chinese invention patent application number 201710292448.9 discloses a kind of graphene/cement mortar composite material, packet
It includes, composite material, cement and the water of graphite alkenes material and grail.The invention changes the addition side of graphite alkenes material
Formula, it is first that graphite alkenes material and grail is compound, the composite material of graphene and grail is obtained, then by treated
The composite particles of graphene and grail, at cement mortar, obtain graphite alkenes material/water cement mortar composite wood with cement composition
Material, can well solve graphite alkenes material scattering problem, ensure that the perfect of its excellent performance plays, and need not be added
Other auxiliary agents, reduce the introducing of impurity, fundamentally solve soft graphite alkenes material and mix unevenness in cement system
Even disadvantage can ensure the evenly dispersed of graphene, while graphite alkenes material and grail is compound, it is ensured that graphite
The tiled state of alkenes material reduces fold, preferably plays its performance.
Chinese invention patent application number 201710918624.5 disclose a kind of modified graphene cement-base composite material and
Its preparation and application, the modified graphene cement-base composite material include following components according to mass parts：30 ~ 50 parts of water, cement
100 parts, 0.35 ~ 2 part of naphthalene water reducer, 0.5 ~ 4 part of graphene, 100 ~ 300 parts of normal sand；Preparation flow is as follows：（1）Prepare naphthalene
Based water reducer solution；（2）Prepare modified graphene suspension；（3）It is prepared by modified graphene cement-base composite material.With existing skill
Art is compared, and the graphene cement-base composite material of the invention is simple with preparation process, high mechanical strength, durability are good, structure
The advantages that fine and close, prepare voltage sensitive sensor have stress and strain monitoring signal are sensitive, signal-to-noise ratio is low, militarys service is stable, and
The advantages such as concrete compatibility is good.The voltage sensitive sensor is in necks such as concrete structure monitoring, traffic flow statistics and road surface deicings
Domain has broad application prospects.
According to above-mentioned, when preparing composite material for graphene-based material to be added in cement mortar in existing scheme,
Graphene is easily reunited, and then influences the mechanical property of composite material, constrains enhancing effect, the present invention proposes one kind
Distributed graphene/cementitious composite the building mortar of load and preparation method, can effectively solve above-mentioned technical problem.
Invention content
At present using it is wider it is direct graphene-based material is added in cement mortar when, graphene is easily reunited,
And then the performance of composite material is affected, limit the application of graphene/cement mortar composite material.
To solve the above problems, the present invention uses following technical scheme：
A kind of preparation method of the distributed graphene/cementitious composite building mortar of load, the detailed process of preparation are：
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 20 ~ 40min, oxygen is added
Graphite alkene is ultrasonically treated 40 ~ 50min, graphene oxide is made to be filled in sepiolite internal void；
（2）Amination molybdenum disulfide is added, functional group reactions are carried out with the graphene oxide in sepiolite；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, that is, load distributed graphene/cementitious composite building mortar.
Preferably, step（1）The mass concentration of the hydrochloric acid solution is 25 ~ 35%.
Preferably, in the preparation process of the composite material, each raw material by weight, wherein：α-sepiolite powder 52 ~
66 parts by weight, 25 ~ 30 parts by weight of graphene oxide, 4 ~ 8 parts by weight of amination molybdenum disulfide, 5 ~ 10 parts by weight of hydrazine hydrate.
Preferably, step（4）The water-reducing agent is lignin sulfonate water-reducing agent, naphthalene series high-efficiency water-reducing agent, melamine
At least one of amine system high efficiency water reducing agent.
Preferably, step（4）The antifoaming agent is silicone emulsion, polypropylene glycerol aether, polyoxyethylene polyoxy Propanolamine
At least one of ether, dimethyl silicone polymer.
Preferably, step（4）The thixotropic lubricant is aluminium-magnesium silicate.
Preferably, step（4）In the mixing material, by weight, wherein：Graphene/sepiolite composite material 10 ~
20 parts by weight, 76 ~ 88 parts by weight of grail, 1 ~ 2 parts by weight of water-reducing agent, 0.5 ~ 1 parts by weight of antifoaming agent, thixotropic lubricant 0.5 ~ 1
Parts by weight.
Preferably, step（5）In the mechanical agitation system, by weight, wherein：66 ~ 73 parts by weight of mixing material,
17 ~ 19 parts by weight of cement, water 30-50 parts by weight, 3 ~ 5 parts by weight of phosphonate dispersants.
Preferably, step（5）The rotating speed of the high speed machine stirring is 200 ~ 300r/min.
A kind of load dispersing type graphene/cementitious composite building mortar being prepared by the above method, passes through amination
Functional group reactions between molybdenum disulfide and carrier internal oxidition graphene make sepiolite powder body surface face have good surface lubrication
Property, the process for avoiding sepiolite carrier in cement mortar mix is reunited；Further by phosphonate dispersants to Hai Pao
The dissolution of stone promotes uniform single fasciculation dispersion of fiber in sepiolite, to the graphene uniform dispersion for driving it to load
In cement mortar, for enhancing modified cement mortar, solve grapheme material mixed in cement mortar system it is uneven
Disadvantage, can ensure the evenly dispersed of graphene.
It tests the graphene distribution characteristics of the moulded products of graphene/cement mortar composite material prepared by the present invention and resists
Compressive Strength, and with the cement mortar composite material of the direct addition graphene of identical match ratio, be not added with the cement bonded sand of graphene
Slurry composite material compares, and method of the invention has a clear superiority, as shown in table 1.
Table 1：
| Performance indicator | The present invention | Directly add the cement mortar composite material of graphene | It is not added with the cement mortar composite material of graphene |
| Dispersing character | It is evenly dispersed | There are agglomerations | - |
| Compression strength（MPa） | 95-110 | 48.8 | 29 |
The present invention provides a kind of distributed graphene/cementitious composite building mortar of load and preparation methods, with prior art phase
Than the feature and excellent effect protruded is：
1, the method that the distributed graphene/cementitious composite building mortar of load is prepared using sepiolite supported graphene is proposed.
2, by the functional group reactions between amination molybdenum disulfide and sepiolite carrier internal oxidition graphene, make sepiolite powder
Body surface face has good surface lubrication, avoids sepiolite carrier and is asked what the process of cement mortar mix was reunited
Topic.
3, using phosphonate dispersants to the dissolution of sepiolite so that its graphene uniform loaded is scattered in cement
In mortar, solves grapheme material and mix non-uniform disadvantage in cement mortar system, can ensure the uniform of graphene
Dispersion, the enhancing modified effect of cement mortar are excellent.
Specific implementation mode
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 32min, oxidation stone is added
Black alkene is ultrasonically treated 46min；The mass concentration of hydrochloric acid solution is 31%；
（2）Amination molybdenum disulfide is added；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
In the preparation process of composite material, each raw material by weight, wherein：α -60 parts by weight of sepiolite powder, graphite oxide
27 parts by weight of alkene, 6 parts by weight of amination molybdenum disulfide, 7 parts by weight of hydrazine hydrate；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；Water-reducing agent is lignin sulfonate water-reducing agent；Antifoaming agent is
Silicone emulsion；Thixotropic lubricant is aluminium-magnesium silicate；
In mixing material, by weight, wherein：Graphene/16 parts by weight of sepiolite composite material, 81 parts by weight of grail,
2 parts by weight of water-reducing agent, 0.5 parts by weight of antifoaming agent, 0.5 parts by weight of thixotropic lubricant；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, that is, load distributed graphene/cementitious composite building mortar；
The rotating speed of high speed machine stirring is 260r/min.
In mechanical agitation system, by weight, wherein：69 parts by weight of mixing material, 18 parts by weight of cement, 30 weight of water
Part, 4 parts by weight of calgon dispersant.
Graphene made from embodiment 1/cement mortar composite material, the graphene distribution characteristics of moulded products and resistance to compression
Intensity is as shown in table 2.
Embodiment 2
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 20min, oxidation stone is added
Black alkene is ultrasonically treated 40min；The mass concentration of hydrochloric acid solution is 25%；
（2）Amination molybdenum disulfide is added；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
In the preparation process of composite material, each raw material by weight, wherein：α -66 parts by weight of sepiolite powder, graphite oxide
25 parts by weight of alkene, 4 parts by weight of amination molybdenum disulfide, 5 parts by weight of hydrazine hydrate；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；Water-reducing agent is naphthalene series high-efficiency water-reducing agent；Antifoaming agent is polyoxy third
Alkene glycerin ether；Thixotropic lubricant is aluminium-magnesium silicate；
In mixing material, by weight, wherein：Graphene/10 parts by weight of sepiolite composite material, 88 parts by weight of grail,
1 parts by weight of water-reducing agent, 0.5 parts by weight of antifoaming agent, 0.5 parts by weight of thixotropic lubricant；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, that is, load distributed graphene/cementitious composite building mortar；
The rotating speed of high speed machine stirring is 200r/min.
In mechanical agitation system, by weight, wherein：73 parts by weight of mixing material, 17 parts by weight of cement, 35 weight of water
Part, 3 parts by weight of polyphosphoric acids dipersant.
Graphene made from embodiment 2/cement mortar composite material, the graphene distribution characteristics of moulded products and resistance to compression
Intensity is as shown in table 2.
Embodiment 3
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 40min, oxidation stone is added
Black alkene is ultrasonically treated 50min；The mass concentration of hydrochloric acid solution is 35%；
（2）Amination molybdenum disulfide is added；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
In the preparation process of composite material, each raw material by weight, wherein：α -52 parts by weight of sepiolite powder, graphite oxide
30 parts by weight of alkene, 8 parts by weight of amination molybdenum disulfide, 10 parts by weight of hydrazine hydrate；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；Water-reducing agent is melamine superplasticizer；Antifoaming agent is
Polyoxyethylene polyoxy propyl alcohol amidogen ether；Thixotropic lubricant is aluminium-magnesium silicate；
In mixing material, by weight, wherein：Graphene/20 parts by weight of sepiolite composite material, 76 parts by weight of grail,
2 parts by weight of water-reducing agent, 1 parts by weight of antifoaming agent, 1 parts by weight of thixotropic lubricant；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, that is, load distributed graphene/cementitious composite building mortar；
The rotating speed of high speed machine stirring is 300r/min.
In mechanical agitation system, by weight, wherein：66 parts by weight of mixing material, 19 parts by weight of cement, 35 weight of water
Part, 5 parts by weight of sodium tripolyphosphate dispersant.
Graphene made from embodiment 3/cement mortar composite material, the graphene distribution characteristics of moulded products and resistance to compression
Intensity is as shown in table 2.
Embodiment 4
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 25min, oxidation stone is added
Black alkene is ultrasonically treated 43min；The mass concentration of hydrochloric acid solution is 28%；
（2）Amination molybdenum disulfide is added；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
In the preparation process of composite material, each raw material by weight, wherein：α -67 parts by weight of sepiolite powder, graphite oxide
26 parts by weight of alkene, 5 parts by weight of amination molybdenum disulfide, 7 parts by weight of hydrazine hydrate；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；Water-reducing agent is lignin sulfonate water-reducing agent；Antifoaming agent is
Dimethyl silicone polymer；Thixotropic lubricant is aluminium-magnesium silicate；
In mixing material, by weight, wherein：Graphene/12 parts by weight of sepiolite composite material, 85 parts by weight of grail,
2 parts by weight of water-reducing agent, 0.5 parts by weight of antifoaming agent, 0.5 parts by weight of thixotropic lubricant；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, that is, load distributed graphene/cementitious composite building mortar；
The rotating speed of high speed machine stirring is 220r/min.
In mechanical agitation system, by weight, wherein：71 parts by weight of mixing material, 18 parts by weight of cement, 40 weight of water
Part, 3 parts by weight of phosphonate dispersants.
Graphene made from embodiment 4/cement mortar composite material, the graphene distribution characteristics of moulded products and resistance to compression
Intensity is as shown in table 2.
Embodiment 5
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 35min, oxidation stone is added
Black alkene is ultrasonically treated 48min；The mass concentration of hydrochloric acid solution is 33%；
（2）Amination molybdenum disulfide is added；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
In the preparation process of composite material, each raw material by weight, wherein：α -61 parts by weight of sepiolite powder, graphite oxide
29 parts by weight of alkene, 7 parts by weight of amination molybdenum disulfide, 8 parts by weight of hydrazine hydrate；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；Water-reducing agent is naphthalene series high-efficiency water-reducing agent；Antifoaming agent is emulsification silicon
Oil；Thixotropic lubricant is aluminium-magnesium silicate；
In mixing material, by weight, wherein：Graphene/12 parts by weight of sepiolite composite material, 85 parts by weight of grail,
1 parts by weight of water-reducing agent, 1 parts by weight of antifoaming agent, 1 parts by weight of thixotropic lubricant；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, that is, load distributed graphene/cementitious composite building mortar；
The rotating speed of high speed machine stirring is 280r/min.
In mechanical agitation system, by weight, wherein：68 parts by weight of mixing material, 18 parts by weight of cement, 40 weight of water
Part, 5 parts by weight of calgon dispersant.
Graphene made from embodiment 5/cement mortar composite material, the graphene distribution characteristics of moulded products and resistance to compression
Intensity is as shown in table 2.
Embodiment 6
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 30min, oxidation stone is added
Black alkene is ultrasonically treated 45min；The mass concentration of hydrochloric acid solution is 30%；
（2）Amination molybdenum disulfide is added；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
In the preparation process of composite material, each raw material by weight, wherein：α -58 parts by weight of sepiolite powder, graphite oxide
28 parts by weight of alkene, 6 parts by weight of amination molybdenum disulfide, 8 parts by weight of hydrazine hydrate；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；Water-reducing agent is melamine superplasticizer；Antifoaming agent is
Polyoxyethylene polyoxy propyl alcohol amidogen ether；Thixotropic lubricant is aluminium-magnesium silicate；
In mixing material, by weight, wherein：Graphene/15 parts by weight of sepiolite composite material, 81 parts by weight of grail,
2 parts by weight of water-reducing agent, 1 parts by weight of antifoaming agent, 1 parts by weight of thixotropic lubricant；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, that is, load distributed graphene/cementitious composite building mortar；
The rotating speed of high speed machine stirring is 250r/min.
In mechanical agitation system, by weight, wherein：70 parts by weight of mixing material, 18 parts by weight of cement, 40 weight of water
Part, 4 parts by weight of calgon dispersant.
Graphene made from embodiment 6/cement mortar composite material, the graphene distribution characteristics of moulded products and resistance to compression
Intensity is as shown in table 2.
Comparative example 1
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 30min, oxidation stone is added
Black alkene is ultrasonically treated 45min；The mass concentration of hydrochloric acid solution is 30%；
（2）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
In the preparation process of composite material, each raw material by weight, wherein：α -64 parts by weight of sepiolite powder, graphite oxide
28 parts by weight of alkene, 8 parts by weight of hydrazine hydrate；
（3）First by step（2）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；Water-reducing agent is melamine superplasticizer；Antifoaming agent is
Polyoxyethylene polyoxy propyl alcohol amidogen ether；Thixotropic lubricant is aluminium-magnesium silicate；
In mixing material, by weight, wherein：Graphene/15 parts by weight of sepiolite composite material, 81 parts by weight of grail,
2 parts by weight of water-reducing agent, 1 parts by weight of antifoaming agent, 1 parts by weight of thixotropic lubricant；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, is i.e. graphene/cement mortar composite material；High speed machine stirs
The rotating speed mixed is 250r/min.
In mechanical agitation system, by weight, wherein：70 parts by weight of mixing material, 18 parts by weight of cement, 40 weight of water
Part, 4 parts by weight of calgon dispersant.
Comparative example 1 is without addition amination molybdenum disulfide, graphene obtained/cement mortar composite material, molding system
The graphene distribution characteristics and compression strength of product are as shown in table 2.
Comparative example 2
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 30min, oxidation stone is added
Black alkene is ultrasonically treated 45min；The mass concentration of hydrochloric acid solution is 30%；
（2）Amination molybdenum disulfide is added；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
In the preparation process of composite material, each raw material by weight, wherein：α -58 parts by weight of sepiolite powder, graphite oxide
28 parts by weight of alkene, 6 parts by weight of amination molybdenum disulfide, 8 parts by weight of hydrazine hydrate；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；Water-reducing agent is melamine superplasticizer；Antifoaming agent is
Polyoxyethylene polyoxy propyl alcohol amidogen ether；Thixotropic lubricant is aluminium-magnesium silicate；
In mixing material, by weight, wherein：Graphene/15 parts by weight of sepiolite composite material, 81 parts by weight of grail,
2 parts by weight of water-reducing agent, 1 parts by weight of antifoaming agent, 1 parts by weight of thixotropic lubricant；
（5）By step（4）Mixing material obtained coordinates with cement, water, and is aided with high speed machine stirring and cement mortar is made, i.e.,
Graphene/cement mortar composite material；The rotating speed of high speed machine stirring is 250r/min.
In mechanical agitation system, by weight, wherein：74 parts by weight of mixing material, 18 parts by weight of cement, 40 weight of water
Part.
Comparative example 2 is without addition phosphonate dispersants, graphene obtained/cement mortar composite material, moulded products
Graphene distribution characteristics and compression strength it is as shown in table 2.
The test method of above-mentioned performance indicator is：
The standard cube that the length of side is 15cm is made in the graphene obtained according to embodiment 1-6, comparative example 1-2/cementitious composite mortar
Body test block, specimen molding rear form removal for 24 hours, in standard curing condition（Temperature is 20 DEG C, and relative humidity is 95% or more）Lower maintenance
28d；In order to be conducive to qualitative comparison, for the traditional cements used to be 425, grail is 30-50 mesh, and graphene oxide is same
Batch.Curing condition is identical.
Using the distribution characteristics of SEM scanning electron microscopic observations graphene in the composite, then by test block along different directions
It splits, continues to scan on the distribution characteristics of observation graphene；
Compressive strength test is carried out using concrete pressure testing machine, takes loading speed 0.8MPa/s.It is destroyed simultaneously when test specimen is close
When starting rapid deformation, stop Adjustment Tests machine oil door, until test specimen destroys, writes down limit of rupture load.Measure compression strength.
Table 2：
| Performance indicator | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Comparative example 1 | Comparative example 2 |
| Distribution characteristics | It is evenly dispersed | It is evenly dispersed | It is evenly dispersed | It is evenly dispersed | It is evenly dispersed | It is evenly dispersed | There are agglomerations | Reunite in the presence of a small amount of |
| Compression strength（MPa） | 95.2 | 110.9 | 112.3 | 110.5 | 109.1 | 102.8 | 61.5 | 82.7 |
Claims (10)
1. a kind of preparation method of the distributed graphene/cementitious composite building mortar of load, which is characterized in that the specific mistake of preparation
Cheng Wei：
（1）Hydrochloric acid solution is first prepared, α-sepiolite powder is then added and carries out expanding treatment, after impregnating 20 ~ 40min, oxygen is added
Graphite alkene is ultrasonically treated 40 ~ 50min, graphene oxide is made to be filled in sepiolite internal void；
（2）Amination molybdenum disulfide is added, functional group reactions are carried out with the graphene oxide in sepiolite；
（3）Hydrazine hydrate is added, graphene oxide is reduced to graphene, wash drying, graphene/sepiolite composite material is made；
（4）First by step（3）Graphene obtained/sepiolite composite material is mixed with grail, and water-reducing agent, defoaming is then added
Agent, thixotropic lubricant are stirred processing, and mixing material is made；
（5）By step（4）Mixing material obtained coordinates with cement, water, is continuously added to phosphonate dispersants and is carried out to sepiolite
It loosens dispersion, and is aided with high speed machine stirring and cement mortar is made, that is, load distributed graphene/cementitious composite building mortar.
2. the preparation method of the distributed graphene/cementitious composite building mortar of a kind of load according to claim 1, feature
It is：Step（1）The mass concentration of the hydrochloric acid solution is 25 ~ 35%.
3. the preparation method of the distributed graphene/cementitious composite building mortar of a kind of load according to claim 1, feature
It is：In the preparation process of the composite material, each raw material by weight, wherein：α -52 ~ 66 parts by weight of sepiolite powder,
25 ~ 30 parts by weight of graphene oxide, 4 ~ 8 parts by weight of amination molybdenum disulfide, 5 ~ 10 parts by weight of hydrazine hydrate.
4. the preparation method of the distributed graphene/cementitious composite building mortar of a kind of load according to claim 1, feature
It is：Step（4）The water-reducing agent is lignin sulfonate water-reducing agent, naphthalene series high-efficiency water-reducing agent, melamine series efficiently subtract
At least one of aqua.
5. the preparation method of the distributed graphene/cementitious composite building mortar of a kind of load according to claim 1, feature
It is：Step（4）The antifoaming agent is silicone emulsion, polypropylene glycerol aether, polyoxyethylene polyoxy propyl alcohol amidogen ether, poly dimethyl
At least one of siloxanes.
6. the preparation method of the distributed graphene/cementitious composite building mortar of a kind of load according to claim 1, feature
It is：Step（4）The thixotropic lubricant is aluminium-magnesium silicate.
7. the preparation method of the distributed graphene/cementitious composite building mortar of a kind of load according to claim 1, feature
It is：Step（4）In the mixing material, by weight, wherein：Graphene/10 ~ 20 parts by weight of sepiolite composite material,
76 ~ 88 parts by weight of grail, 1 ~ 2 parts by weight of water-reducing agent, 0.5 ~ 1 parts by weight of antifoaming agent, 0.5 ~ 1 parts by weight of thixotropic lubricant.
8. the preparation method of the distributed graphene/cementitious composite building mortar of a kind of load according to claim 1, feature
It is：Step（5）In the mechanical agitation system, by weight, wherein：66 ~ 73 parts by weight of mixing material, cement 17 ~ 19
Parts by weight, water 30-50 parts by weight, 3 ~ 5 parts by weight of phosphonate dispersants.
9. the preparation method of the distributed graphene/cementitious composite building mortar of a kind of load according to claim 1, feature
It is：Step（5）The rotating speed of the high speed machine stirring is 200 ~ 300r/min.
10. a kind of distributed graphene/cementitious composite building mortar of load, which is characterized in that by any one of claim 1 ~ 9 institute
The method of stating is prepared.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353337A (en) * | 2022-08-25 | 2022-11-18 | 广东复特新型材料科技有限公司 | Graphene paper composite filler conductive mortar and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115353337A (en) * | 2022-08-25 | 2022-11-18 | 广东复特新型材料科技有限公司 | Graphene paper composite filler conductive mortar and preparation method thereof |
| CN115353337B (en) * | 2022-08-25 | 2023-04-11 | 广东复特新型材料科技有限公司 | Graphene paper composite filler conductive mortar and preparation method thereof |
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Application publication date: 20181113 |