CN108083758A - A kind of magnesium oxysulfide concrete based composites and preparation method thereof - Google Patents
A kind of magnesium oxysulfide concrete based composites and preparation method thereof Download PDFInfo
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- CN108083758A CN108083758A CN201810051669.1A CN201810051669A CN108083758A CN 108083758 A CN108083758 A CN 108083758A CN 201810051669 A CN201810051669 A CN 201810051669A CN 108083758 A CN108083758 A CN 108083758A
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- graphene
- magnesium oxysulfide
- oxysulfide concrete
- based composites
- concrete based
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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
- C04B28/30—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 magnesium cements or similar cements
Abstract
The invention discloses a kind of magnesium oxysulfide concrete based composites and preparation method thereof, which includes graphene, nano material dispersant, antifoaming agent, superfine silica gel powder, starch, Adlerika and light-burned MgO powder；Its preparation method is by graphene, nano material dispersant, superfine silica gel powder and starch mixing, is added in Adlerika, is disperseed, mixed liquor is made, then the mixed liquor, antifoaming agent and light-burned MgO powder are mixed after stirring evenly, demould, conserved after pouring into 12~36h of mould molding.The remarkable advantage of the present invention has high-tensile for the magnesium oxysulfide concrete based composites, and compared to traditional magnesium oxysulfide concrete material for being not added with graphene, tensile strength improves 68~144.9%, has superior durability and reliability；Meanwhile its preparation method is simple, process is easy to control, at low cost, energy conservation and environmental protection.
Description
Technical field
The invention belongs to cement material fields more particularly to a kind of magnesium oxysulfide concrete based composites and preparation method thereof.
Background technology
Magnesium oxysulfide concrete is by active MgO and certain density MgSO4Solution prepares a kind of MgO-MgSO to be formed4-H2O
Ternary gelling system, has that fast solidifying, early strength are high, caking property is good, are not required that wet curing, thermal conductivity be low, fire resistance
High, wearability is good and the features such as excellent corrosion resistance, and energy consumption is low, and preparation process is simple, can be widely applied to produce and build
Build the engineerings such as insulating light wall slab, refractory material, decorating and renovating material and oil well leak stopping.But magnesium oxysulfide concrete tension is strong before modified
It spends relatively low, easily occurs unbalance stress in practical application, structure durability is caused to reduce, seriously limit its application.With to sulphur
The research of oxygen magnesium cement is goed deep into, and magnesium oxysulfide concrete incorporation citric acid can generate a kind of new 5Mg (OH)2·MgSO4·7H2O is crystallized
Phase (517 phase), physical and mechanical property is improved.And the filling effect of fly ash grain can make magnesium oxysulfide concrete slurry more
It is closely knit, so as to improve its compression strength.But the research at present to improving magnesium oxysulfide concrete flexural strength is not also extensive.
The honeycomb lattice structure that graphene is made of carbon hexatomic ring, unique Colloidal particles make it have excellent
Different mechanics, electricity, optical property.Therefore preferable reinforcing material can be used as, assigns the superior performance of composite material, is expanded
Open up the application field of composite material.Graphene has excellent mechanical performance, good flexibility and huge specific surface area, makes
It obtains it and carries out the good compound mutual supplement with each other's advantages or reinforcement that can realize two kinds of materials with magnesium oxysulfide concrete, sulphur can be increased substantially
The tensile strength of oxygen magnesium cement-based material improves durability and reliability, assigns its new capability, it is made to have in engineering material
Powerful development power.But since graphene surface can be low, interface interaction is weak between cement, and dispersion effect is poor.Therefore, now there is an urgent need for
A kind of peptizaiton that can effectively improve graphene in cement, it is compound to prepare the magnesium oxysulfide concrete with high-tensile
Material.
The content of the invention
Goal of the invention：The first object of the present invention is to provide a kind of magnesium oxysulfide concrete base composite wood with high-tensile
Material；The second object of the present invention is to provide the preparation method of the composite material.
Technical solution：The magnesium oxysulfide concrete based composites of the present invention, including the following raw material：Graphene, nano material point
Powder, antifoaming agent, superfine silica gel powder, starch, Adlerika and light-burned MgO powder；Wherein, the graphene accounts for light-burned MgO silty
The 0.02~2.0% of amount, graphene, nano material dispersant, antifoaming agent, the mass ratio of superfine silica gel powder and starch are 1:(0.005
~0.05):(0.002~0.01):(0.003~0.03):(0.02~0.3).
The present invention by adding superfine silica gel powder, starch and nano material dispersant in the feed so that superfine silica gel powder,
Starch acts synergistically with nano material dispersant, improves homodisperse power of the graphene in cement so that graphene is mixed completely
Enter into magnesium oxysulfide concrete, improve the active force with cement interface.Preferably, graphene, nano material dispersant, antifoaming agent,
The mass ratio of superfine silica gel powder and starch can be 1:(0.01~0.03):(0.005~0.008):(0.007~0.01):(0.06~
0.2) graphene, nano material dispersant, superfine silica gel powder and starch, is enabled to more preferably to mix in the content range, from
And improve dispersion force of the graphene in cement.
Furtherly, for the thickness for the graphene that the present invention uses for 2.0~4.0nm, specific surface area is 360~450m2/ g,
Using the thickness range and specific surface area scope graphene is enabled to be better dispersed in cement.
It further says, antifoaming agent may include tributyl phosphate or dimethicone.Nano material dispersant may include ten
Dialkyl benzene sulfonic acids sodium, sodium taurocholate or polyvinylpyrrolidone.The mass percentage concentration of Adlerika can be 0.28~0.33.
The molar ratio of light-burned MgO powder and magnesium sulfate can be 7~9:1.
The method that the present invention prepares magnesium oxysulfide concrete based composites, includes the following steps：
(1) by graphene, nano material dispersant, superfine silica gel powder and starch mixing, add in Adlerika, disperse,
Mixed liquor is made；
(2) above-mentioned mixed liquor, antifoaming agent and light-burned MgO powder is mixed after stirring evenly, is taken off after pouring into 12~36h of mould molding
Mould is conserved.
Furtherly, maintenance be relative humidity be 57~70%, temperature be 19~25 DEG C under the conditions of carry out.It is supported at this
The aquation that module is enabled under the conditions of shield is more abundant, and relative humidity is excessive or the excessively high influence to intensity is larger.
Advantageous effect：Compared with prior art, remarkable advantage of the invention is：The magnesium oxysulfide concrete based composites have
High-tensile, compared to traditional magnesium oxysulfide concrete material for being not added with graphene, tensile strength improves 68~
144.9%, there is superior durability and reliability；Meanwhile its preparation method is simple, process is easy to control, at low cost, energy-saving ring
It protects.
Description of the drawings
Fig. 1 is the microscopic appearance figure for the graphene that the present invention uses；
Fig. 2 is the microscopic appearance figure for the magnesium oxysulfide concrete hardened paste that graphene volume of the present invention is 0.02%；
Fig. 3 is the microscopic appearance figure for the magnesium oxysulfide concrete hardened paste that graphene volume of the present invention is 0.5%；
Fig. 4 is the microscopic appearance figure for the magnesium oxysulfide concrete hardened paste that graphene volume of the present invention is 1.0%.
Specific embodiment
Technical scheme is described in further detail with reference to the accompanying drawings and embodiments.
The thickness of the commercially available graphene for obtaining, using of the raw material that the present invention uses for 2.0~4.0nm,
Specific surface area is 360~450m2/g。
Embodiment 1
Raw material：Graphene, neopelex, tributyl phosphate, superfine silica gel powder, starch, Adlerika and light
Burn MgO powder；Wherein, the mass ratio of graphene, neopelex, tributyl phosphate, superfine silica gel powder and starch is 1:
0.02:0.007:0.009:0.1, graphene accounts for the molar ratio of the 0.02% of light-burned MgO silty amount, light-burned MgO powder and magnesium sulfate
For 7:1.
Preparation method includes the following steps：
(1) distilled water and epsom salt are weighed, prepares the Adlerika that mass concentration is 0.3；
(2) by graphene, neopelex, superfine silica gel powder and starch mixing, add in above-mentioned Adlerika,
Scattered 40min, is made mixed liquor；
(3) above-mentioned mixed liquor, tributyl phosphate and light-burned MgO powder is mixed after stirring evenly, is taken off after pouring into mould molding 25h
Mould is 60% in relative humidity, and temperature carries out maintenance 28d under the conditions of being 22 DEG C, you can magnesium oxysulfide concrete based composites are made.
Embodiment 2
Raw material：Graphene, neopelex, tributyl phosphate, superfine silica gel powder, starch, Adlerika and light
Burn MgO powder；Wherein, the mass ratio of graphene, neopelex, tributyl phosphate, superfine silica gel powder and starch is 1:
0.01:0.008:0.007:0.2, graphene accounts for the 0.5% of light-burned MgO silty amount, and the molar ratio of light-burned MgO powder and magnesium sulfate is
8:1。
Preparation method includes the following steps：
(1) distilled water and epsom salt are weighed, prepares the Adlerika of mass concentration 0.33；
(2) by graphene, neopelex, superfine silica gel powder and starch mixing, add in above-mentioned Adlerika,
Scattered 40min, is made mixed liquor；
(3) above-mentioned mixed liquor, tributyl phosphate and light-burned MgO powder is mixed after stirring evenly, is taken off after pouring into mould molding 12h
Mould is 70% in relative humidity, and temperature carries out maintenance 28d under the conditions of being 19 DEG C, you can magnesium oxysulfide concrete based composites are made.
Embodiment 3
Raw material：Graphene, neopelex, tributyl phosphate, superfine silica gel powder, starch, Adlerika and light
Burn MgO powder；Wherein, the mass ratio of graphene, neopelex, tributyl phosphate, superfine silica gel powder and starch is 1:
0.03:0.005:0.01:0.06, graphene accounts for the 1% of light-burned MgO silty amount, and the molar ratio of light-burned MgO powder and magnesium sulfate is 8:
1。
Preparation method includes the following steps：
(1) distilled water and epsom salt are weighed, prepares the Adlerika that mass concentration is 0.28；
(2) by graphene, neopelex, superfine silica gel powder and starch mixing, add in above-mentioned Adlerika,
Scattered 40min, is made mixed liquor；
(3) above-mentioned mixed liquor, dimethicone and light-burned MgO powder is mixed after stirring evenly, is taken off after pouring into mould molding 36h
Mould is 57% in relative humidity, and temperature carries out maintenance 28d under the conditions of being 25 DEG C, you can magnesium oxysulfide concrete based composites are made.
By magnesium oxysulfide concrete based composites prepared by embodiment 1 to 3 according to standard mechanic property test method (with reference to mark
Quasi- GBT50081-2002) Mechanics Performance Testing is carried out, and carried out pair with being not added with traditional magnesium oxysulfide concrete test specimen of graphene
Than the result of acquisition is as shown in the following table 1 and Fig. 1-4.
The tensile property of composite material prepared by 1 embodiment 1-3 of table
By table 1, magnesium oxysulfide concrete based composites prepared by the present invention, tensile strength is compared to being not added with stone
Traditional magnesium oxysulfide concrete test specimen of black alkene, has been respectively increased 70%, 95.8% and 121.2%, it follows that the sulphur oxygen of the present invention
Magnesium cement-base composite material has high-tensile.Understand that graphene can be incorporated into magnesium oxysulfide water in combination with Fig. 1 to Fig. 4
In mud, huge specific surface area makes it play the role of good filling and bridge joint, while graphene in magnesium oxysulfide concrete matrix
Good flexibility can significantly improve the tensile strength and fracture resistance of magnesium oxysulfide concrete, and the present invention 0.02~
Graphene volume is higher in the range of 2.0%, and enhancing effect is more apparent.
Embodiment 4
6 groups of parallel tests are designed, basic step is same as Example 1, the difference is that the content of graphene, accounts for respectively
0.01%, 0.02%, 0.08%, 1.5%, 2%, the 2.1% of light-burned MgO silty amount, the magnesium oxysulfide concrete base of preparation is compound
Material carries out tensile property detection, and the result of acquisition is as shown in table 2 below.
The tensile property of composite material prepared by 2 embodiment 4 of table
By table 2, add in and account for magnesium oxysulfide concrete base prepared by the graphene of light-burned MgO silty amount 0.02~2.0%
The tensile property of composite material is strong, this is because graphene is incorporated into magnesium oxysulfide concrete, the graphene particle of cluster is uniformly divided
It dissipates in the base, hydrated product, which is refined and is distributed more uniform, huge specific surface area, makes it in magnesium oxysulfide concrete matrix
In play the role of good filling and bridge joint, while the good flexibility of graphene can significantly improve magnesium oxysulfide concrete
Tensile property and fracture resistance.If graphene content is less, then spacing is larger between graphene particle, intermolecular force compared with
It is weak, the influence unobvious to intensity.
Embodiment 5
5 groups of parallel tests are designed, basic step is same as Example 1, the difference is that graphene, nano material are disperseed
Agent, antifoaming agent, the mass ratio of superfine silica gel powder and starch are specially (1:0.004:0.02:0.002:0.4)、(1:0.005:
0.01:0.003:0.3)、(1:0.02:0.007:0.009:0.1)、(1:0.05:0.002:0.03:0.02)、(1:0.006:
0.001:0.04:0.01) the magnesium oxysulfide concrete based composites of preparation, are subjected to tensile property detection, the result of acquisition is as follows
Shown in table 3.
The tensile property of composite material prepared by 3 embodiment 5 of table
By table 3, using the present invention 1:(0.005~0.05):(0.002~0.01):(0.003~0.03):
Prepared by the mass ratio of graphene, nano material dispersant, antifoaming agent, superfine silica gel powder and starch in the range of (0.02~0.3)
The tensile property of magnesium oxysulfide concrete based composites is strong, and graphene, nano material dispersant, antifoaming agent, superfine silica gel powder and shallow lake
The quality of powder is more than such as the 1st and the 5th group of mass ratio in the scope of the present invention, the tensile strength of the composite material prepared compared with
This is because in contrast when graphene volume is larger, large-scale cluster, and graphene can occur for difference between graphene particle
Volume is larger, when cluster volume is larger, can destroy the integrality of aquation matrix script；When graphene volume is larger, to ensure
The workability of cement mortar needs the larger ratio of mud, and when the ratio of mud is larger, light calcined magnesia is absorbed generates dilatancy compared with juicy
Mg (OH)2, so as to increase Behavior of Hardened Cement Paste internal void, and then hinder the development of intensity.
Comparative example 1
Basic step is same as Example 1, the difference is that being added without superfine silica gel powder in raw material, which is prepared
Composite material carry out performance detection, the results are shown in Table 4 for acquisition.
The composite property table of comparisons prepared by 4 comparative example 1 of table and embodiment 1
Comparative example 2
Basic step is same as Example 1, the difference is that being added without starch in raw material, is answered prepared by the comparative example
Condensation material carries out performance detection, and the results are shown in Table 5 for acquisition.
The composite property table of comparisons prepared by 5 comparative example 2 of table and embodiment 1
By table 4 and table 5, it is weaker not add the tensile strength of material prepared by superfine silica gel powder or starch in raw material,
This is because addition superfine silica gel powder and starch, the two can act synergistically with nano material dispersant, graphene is improved in cement
In homodisperse power so that graphene is completely incorporated into magnesium oxysulfide concrete, improve with the active force of cement interface, so as to fill
The effect of graphene is waved in distribution, improves the tensile strength of magnesium oxysulfide concrete based composites, it is made to be not added with compared to traditional
The magnesium oxysulfide concrete material of graphene, tensile strength improve 68~144.9%.
Embodiment 6
Basic step is same as Example 1, the difference is that nano material dispersant is sodium taurocholate or polyvinyl pyrrole
The molar ratio 9 of alkanone, MgO powder and magnesium sulfate:1.
Claims (9)
1. a kind of magnesium oxysulfide concrete based composites, it is characterised in that including the following raw material：Graphene, nano material dispersant,
Antifoaming agent, superfine silica gel powder, starch, Adlerika and light-burned MgO powder；Wherein, the graphene accounts for light-burned MgO silty amount
0.02~2.0%, graphene, nano material dispersant, antifoaming agent, the mass ratio of superfine silica gel powder and starch are 1:(0.005~
0.05):(0.002~0.01):(0.003~0.03):(0.02~0.3).
2. magnesium oxysulfide concrete based composites according to claim 1, it is characterised in that：The graphene, nano material
Dispersant, antifoaming agent, the mass ratio of superfine silica gel powder and starch are 1:(0.01~0.03):(0.005~0.008):(0.007~
0.01):(0.06~0.2).
3. magnesium oxysulfide concrete based composites according to claim 1, it is characterised in that：The thickness of the graphene is
2.0~4.0nm, specific surface area are 360~450m2/g。
4. magnesium oxysulfide concrete based composites according to claim 1, it is characterised in that：Nano material dispersant bag used
Include neopelex, sodium taurocholate or polyvinylpyrrolidone.
5. magnesium oxysulfide concrete based composites according to claim 1, it is characterised in that：The antifoaming agent includes tricresyl phosphate
Butyl ester or dimethicone.
6. magnesium oxysulfide concrete based composites according to claim 1, it is characterised in that：The quality of the Adlerika
Concentration is 0.28~0.33.
7. magnesium oxysulfide concrete based composites according to claim 1, it is characterised in that：The light-burned MgO powder and sulfuric acid
The molar ratio of magnesium is 7~9:1.
A kind of 8. method for preparing magnesium oxysulfide concrete based composites described in claim 1, it is characterised in that include the following steps：
(1) by graphene, nano material dispersant, superfine silica gel powder and starch mixing, add in Adlerika, disperse, be made
Mixed liquor；
(2) above-mentioned mixed liquor, antifoaming agent and light-burned MgO powder is mixed after stirring evenly, is demoulded after pouring into 12~36h of mould molding, into
Row maintenance.
9. the method for magnesium oxysulfide concrete based composites is prepared according to claim 8, it is characterised in that：In step (2), institute
State maintenance be relative humidity be 57~70%, temperature be 19~25 DEG C under the conditions of carry out.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111471442A (en) * | 2020-04-30 | 2020-07-31 | 中国石油天然气集团有限公司 | Old well blasthole plugging and well cementing liquid system and preparation and use method thereof |
| CN112456955A (en) * | 2020-12-01 | 2021-03-09 | 西南科技大学 | Basic magnesium sulfate cement-based lightweight porous material and preparation method thereof |
| CN113772978A (en) * | 2021-10-20 | 2021-12-10 | 辽宁科技大学 | Method for preparing composite magnesium oxysulfate cement capable of being constructed in winter by using desulfurization solution |
| CN114634348A (en) * | 2022-04-25 | 2022-06-17 | 江苏正方园建设集团有限公司 | Environment-friendly magnesium oxysulfide material production process and magnesium oxysulfide plate |
| CN114890769A (en) * | 2022-05-27 | 2022-08-12 | 韩涛 | Self-leveling heat-conducting cementing material and preparation method and application thereof |
| CN115636655A (en) * | 2022-07-26 | 2023-01-24 | 国网山东省电力公司电力科学研究院 | High-fluidity self-compacting light high-strength concrete and preparation method thereof |
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| CN103130436A (en) * | 2013-03-25 | 2013-06-05 | 中国科学院上海硅酸盐研究所 | Oxidized graphene and graphene reinforced cement based composite material and preparation method thereof |
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| CN103130436A (en) * | 2013-03-25 | 2013-06-05 | 中国科学院上海硅酸盐研究所 | Oxidized graphene and graphene reinforced cement based composite material and preparation method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111471442A (en) * | 2020-04-30 | 2020-07-31 | 中国石油天然气集团有限公司 | Old well blasthole plugging and well cementing liquid system and preparation and use method thereof |
| CN111471442B (en) * | 2020-04-30 | 2022-09-09 | 中国石油天然气集团有限公司 | Old well blasthole plugging and cementing liquid system and preparation and application methods thereof |
| CN112456955A (en) * | 2020-12-01 | 2021-03-09 | 西南科技大学 | Basic magnesium sulfate cement-based lightweight porous material and preparation method thereof |
| CN113772978A (en) * | 2021-10-20 | 2021-12-10 | 辽宁科技大学 | Method for preparing composite magnesium oxysulfate cement capable of being constructed in winter by using desulfurization solution |
| CN114634348A (en) * | 2022-04-25 | 2022-06-17 | 江苏正方园建设集团有限公司 | Environment-friendly magnesium oxysulfide material production process and magnesium oxysulfide plate |
| CN114634348B (en) * | 2022-04-25 | 2022-08-30 | 江苏正方园建设集团有限公司 | Environment-friendly magnesium oxysulfate material production process and magnesium oxysulfate plate |
| CN114890769A (en) * | 2022-05-27 | 2022-08-12 | 韩涛 | Self-leveling heat-conducting cementing material and preparation method and application thereof |
| CN115636655A (en) * | 2022-07-26 | 2023-01-24 | 国网山东省电力公司电力科学研究院 | High-fluidity self-compacting light high-strength concrete and preparation method thereof |
| CN115636655B (en) * | 2022-07-26 | 2024-03-26 | 国网山东省电力公司电力科学研究院 | High-fluidity self-compaction light high-strength concrete and preparation method thereof |
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