CN109020395A - A kind of cement prefab, cement cementitious material and preparation method thereof - Google Patents
A kind of cement prefab, cement cementitious material and preparation method thereof Download PDFInfo
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- CN109020395A CN109020395A CN201811049733.9A CN201811049733A CN109020395A CN 109020395 A CN109020395 A CN 109020395A CN 201811049733 A CN201811049733 A CN 201811049733A CN 109020395 A CN109020395 A CN 109020395A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- 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
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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
Abstract
A kind of cement prefab, cement cementitious material and preparation method thereof, belong to cement field.Cement cementitious material includes cement base-material, grapheme material and polycarboxylate water-reducer, and the dosage of grapheme material is the 0.02~0.04% of cement base-material quality；Cement base-material includes aggregate, portland cement, belite cement.Cement cementitious material obtains the flexural strength being enhanced by introducing grapheme material.
Description
Technical field
The present invention relates to cement fields, in particular to a kind of cement prefab, cement cementitious material and its production side
Method.
Background technique
Cement cementitious composite material is most common and most widely used material in current engineering.Although cement cementitious compound
Material has many advantages, such as advantages of higher compressive strength, but since the problems such as its brittleness, easy fracture, low tenacity and low flexural strength causes it
Durability is low and maintenance cost is high.For a long time, it is always urgently to be resolved for improving the flexural strength of cement cementitious composite material
Problem.
The information disclosed in the background technology section is intended only to deepen understanding of the general background technology to the present invention, and
It is not construed as recognizing or implying in any form that the information constitutes the prior art known to those skilled in the art.
Summary of the invention
Based on the deficiencies of the prior art, the present invention provides a kind of cement prefab, cement cementitious material and its production sides
Method partly or entirely to improve, even solves the problems, such as that its flexural strength is not high.
The present invention is implemented as follows:
In a first aspect, the embodiment of the present invention provides a kind of cement cementitious material.
Cement cementitious material includes cement base-material, grapheme material and polycarboxylate water-reducer, and the use of grapheme material
Amount is the 0.02~0.04% of cement base-material quality, and cement base-material includes aggregate, portland cement, belite cement.
In other one or more examples, aggregate includes one or both of normal sand, iron tailings.
In other one or more examples, grapheme material includes graphene, graphene oxide, reduction-oxidation graphite
One of alkene is a variety of.
In other one or more examples, the dosage of grapheme material be cement base-material quality 0.025~
0.036%.
In second aspect, the embodiment of the invention provides a kind of production methods of cement cementitious material.
The production method of cement cementitious material includes:
The dispersion liquid for being dispersed with grapheme material is provided, and also contains polycarboxylate water-reducer in dispersion liquid, wherein polycarboxylic acids
Water-reducing agent is provided in the form being dissolved in water；
Cement base-material is mixed with dispersion liquid.
In other one or more examples, the method for blended cement base-material and dispersion liquid includes: will be in cement base-material
Aggregate be blended in dispersion liquid, portland cement, the belite cement in cement base-material are then mixed into dispersion liquid.
In other one or more examples, stirred when the aggregate in cement base-material is blended in dispersion liquid with First Speed
It mixes, is stirred when portland cement, the belite cement in cement base-material are mixed into dispersion liquid with second speed, and the first speed
Degree is less than second speed.
In the third aspect, the embodiment of the invention provides a kind of cement prefabs
Cement prefab is made using cement cementitious material as the aforementioned.
In fourth aspect, the embodiment of the invention provides a kind of production methods of cement prefab.
The production method of cement prefab includes:
Cement cementitious material is accumulated in a mold with desired shape；It is in temperature after cement cementitious material standing solidification
20 DEG C, relative humidity be 90% under conditions of conserve 24 hours.
In other one or more examples, cement cementitious material is transferred to after mold, carries out standing solidification
Before, also cement cementitious material is shaken to improve bulk density.
The utility model has the advantages that
Cement cementitious material provided in an embodiment of the present invention is a kind of composite material, wherein introducing has grapheme material, is led to
Crossing disperses grapheme material in the right way, is mingled in basis material cement, so as to improve the original anti-folding of cement
The bad problem of performance.Compared to existing modified cement material, in cement cementitious material provided in the embodiment of the present invention
Additive type and dosage are reduced, so as to be realized to a certain extent with the more inexpensive cement gel for obtaining high breaking strength
Gel material.On the other hand, due to using the reduction of raw material, manufacture craft also obtains simplification to a certain extent.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
Graphene is the mono-layer graphite that one kind can be separated from graphite.Graphene is with sp2Hybridized orbit group
At the two-dimensional plane platelet structures of hexagonal honeycomb arrangement.Its thinnest part with a thickness of 0.335nm, only one carbon atom is straight
Diameter is the most thin material in current world.But graphene but possesses outstanding mechanical property, such as its mechanical strength is much higher than
Hundred times of steel, the specific gravity but only about a quarter of steel can be used as light aircraft equipment material.Since carbon atom passes through in its plane
Covalent bond is connected with each other, and keeps its mechanical property in two-dimensional surface very excellent, Young's modulus 1.1TPa, breaking strength can
Reach 125GPa.
Graphene also has unique electrical properties, and resistance is low compared with copper and silver, to be currently known in material at room temperature
Resistance is minimum, and electron mobility is high, therefore will have outstanding performance applied to materials of electronic components.In addition, due to its height
Transparency, satisfactory electrical conductivity, also attract attention on photoelectric field, and can be applied to solar battery, touch panel with
Other related industries.
The Theoretical Physics characteristic of graphene is as follows: the coefficient of heat conduction is up to 5300W/mK, specific surface area up to 2630m2/g、
Resistivity only about 10-6Ω cm, electron mobility are up to 2105cm2/ Vs, optical clarity are up to 97.7%.
In embodiments of the present invention, in view of performances such as the high intensity of grapheme material, high tenacity, it is introduced into cement
In, to improve intensity height, but the awkward situation that flexural strength is not high pushes to provide intensity higher material for architectural engineering
The further development of construction material.
It is carried out specifically below for the cement prefab of the embodiment of the present invention, cement cementitious material and preparation method thereof
It is bright:
Cement cementitious material mainly includes two large divisions, and one is cement-based material, another kind is grapheme material.Graphite
Alkene material is dispersed in cement-based material, and is combined, is fixed with each matter interaction in other cement-based materials,
To play the role of rib, the flexural strength of cement-based material is enable to be enhanced.
In embodiment, cement cementitious material includes cement base-material, grapheme material and polycarboxylate water-reducer.And graphene
The dosage of material is the 0.02~0.04% of cement base-material quality.
Grapheme material in cement cementitious material can be selected freely, but be advisable with 0.02~0.04%.Stone
The dosage of black alkene material will excessively increase the cost of cement cementitious material, then not very obvious to the improvement effect of its intensity very little.
The graphene of selection reasonable volume can obtain the balance of cost of manufacture and performance improvement.In some other example of the invention
In, the dosage of grapheme material is the 0.025~0.036% of cement base-material quality.
The dosage of graphene should be controlled by appropriate its, and it is unfavorable otherwise will to generate to the performance of cement cementitious material
It influences.One, graphene dosage should not be too large.If graphene dosage is too big, can reunite in graphene dispersion process
Phenomenon, and agglomeration will lead to a large amount of graphene films and be stacked and fail.Secondly, the dosage of graphene should not be very little.
It when graphene ratio is too low, can not be evenly distributed on inside cement matrix, many regions of cement can not be increased by graphene
By force.Inventor is in practice, it has been found that the graphene of appropriate amount can play the role of enhancing, such as when graphene ratio is
When 0.03%, flexural strength can be improved significantly, and when graphene ratio is more than 0.03%, flexural strength can go out instead
Now certain downward trend.The reinforcing effect of cement cementitious material and its cost of manufacture are considered for graphene, 0.02%-
0.04% graphene is more suitable.
Inventor is known, and there are multiple types for grapheme material, the cement cementitious material according to practice, in the embodiment of the present invention
Grapheme material in material can use one of graphene, graphene oxide, redox graphene or a variety of.It is therein
All types of graphenes is adjusted as needed there may be the cooperation of a variety of ratios.
In a kind of optional example, cement base-material includes aggregate 50%, portland cement according to mass percent meter
40%, belite cement 10%.Wherein, cement can also use tricalcium silicate, dicalcium silicate, calcium sulphoaluminate in some instances
Deng.Portland cement and belite cement are substituted.But made with the portland cement and belite cement of the weight ratio of 4:1
With being more preferably.
Aggregate therein can be one or both of normal sand, iron tailings.Normal sand is to comply with standard rule after processing
Fixed quartz sand-is to be versatile material necessary to examine strength of cement by standard method test strength of cement mortar-.Standard
Silica (SiO in sand2) content is greater than that 96%, loss on ignition is no more than 0.40%, clay content (including solubility salt) do not surpass
Cross 0.20%.Iron tailings can be divided into monometallic class iron tailings and more metal class iron tailings two major classes according to the content of accompanying element.
Wherein monometallic class iron tailings can be divided into mostly according to the content of its silicon, aluminium, calcium, magnesium with different types again.
Iron tailings is the waste that dressing plant is discharged grinde ore, selection " useful constituent " afterwards, that is, ore warp
Select remaining solid waste after concentrate.It is a kind of complex mineral raw material, containing a small amount of metal component outside.Its essential mineral
Component is gangue mineral, such as quartz, pyroxene, feldspar, garnet, hornblend and its altered mineral.Its chemical component mainly with iron,
Silicon, magnesium, calcium, aluminium oxide based on, and with a small amount of phosphorus, sulphur etc..
Normally, cement cementitious material can be made into simply by mixing various raw materials, however, due to graphite
Alkene material is easy the problem of reuniting, it is preferentially dispersed, to improve its dispersing uniformity in cement-based material.
However grapheme material large specific surface area, it is easy to reunite, its dispersibility is caused to be remarkably decreased.Usual graphene
Dispersibility can be by having it with relatively low concentration in a liquid, or is further advanced by the table of appropriate type
Face activating agent improves and improves to make the decline of its zeta potential.
In other schemes, graphene can also be such that its reunion difficulty increases by surface chemistry group modified, from
And improve dispersibility.For example, by the way that graphene to be aoxidized to the graphene oxide to be formed, surface has residue, can reduce reunion
Tendency.
In the present embodiment, by mixing grapheme material with the polycarboxylic acids for being used in cement as water-reducing agent, make it
Dispersibility is greatly improved, and more stable, to be conducive to evenly dispersed in cement-based material.
Although moreover, it is noted that water-reducing agent there are many selection, in embodiments of the present invention, water-reducing agent
Selection is the formula according to cement cementitious material and is particularly selected.The main function of polycarboxylate water-reducer first is that dispersion
Graphene nano material prevents graphene from agglomeration occurs and fails.Due to polycarboxylate water-reducer surface contain it is a large amount of oxygen-containing
Functional group, therefore, polycarboxylate water-reducer can be crosslinked by the oxygen-containing functional group on surface with graphene, to play dispersion
The effect of graphene.
Based on the above, the embodiment of the invention provides a kind of production methods of cement cementitious material.
Production method includes:
First step, offer are dispersed with the dispersion liquid of grapheme material, wherein also contain polycarboxylic acids diminishing in dispersion liquid
Agent, polycarboxylate water-reducer are provided in the form being dissolved in water.
Wherein, grapheme material can more thoroughly be dispersed by way of stirring, ultrasonic activation.Particularly, originally
In embodiment, graphene dispersion is realized by way of substep in dispersion liquid.Firstly, water will be dissolved in polycarboxylate water-reducer
In, grapheme material is then added, being sufficiently stirred makes graphene dispersion in polycarboxylate water-reducer aqueous solution.In advance by graphene
Nano material is mixed evenly with polycarboxylate water-reducer, it can be made to be easier to be uniformly distributed in cement matrix, make its reunion
Tendency is preferably inhibited.
Second step mixes cement base-material with dispersion liquid.
The method of blended cement base-material and dispersion liquid can be mixes whole raw materials in cement base-material with dispersion liquid together
It closes.Alternatively, after whole raw materials in cement base-material are pre-mixed, then mix with dispersion liquid.Preferably, in the present embodiment,
The method of blended cement base-material and dispersion liquid is that the aggregate in cement base-material is blended in dispersion liquid, then will be in cement base-material
Portland cement, belite cement are mixed into dispersion liquid.Mixing in this way between various raw materials is more uniform.
Further, as a kind of beneficial improvement, with the first speed when the aggregate in cement base-material is blended in dispersion liquid
Degree stirring, is stirred when portland cement, the belite cement in cement base-material are mixed into dispersion liquid with second speed, and the
One speed is less than second speed.Firstly, both aggregate and graphene dispersing solution stir (constant speed stirring) mixing slowly, due to aggregate and stone
Black alkene between the two can't cause unfavorable reaction, therefore, stir using general speed.It is stirred in relatively slow
It mixes under speed, more conducively addition cementitious material (cement class raw material), because cementitious material security risk is added during stirring fastly
It is larger.After cementitious material is added, stirs be conducive to going on smoothly for gelling reaction fastly.
In addition, in the present embodiment, additionally providing a kind of cement prefab being made by cement cementitious material.Cement
Prefabricated component obtains and by cement cementitious material moulding, solidification.
Production method includes: to accumulate cement cementitious material in a mold with desired shape；Cement cementitious material is stood
It is conserved 24 hours under conditions of temperature is 20 DEG C, relative humidity is 90% after solidification.
In order to be enhanced acquisition cement prefab tensile strength, flexural strength, cement cementitious material is transferred to mold
Later, before carrying out standing solidification, also cement cementitious material is shaken to improve bulk density, to make cement cementitious material
It more fully contacts and reacts between various materials in material.In addition, the bulk density of cement increases, inside it is finer and close, resist
Folding intensity, compression strength can be enhanced to a certain extent.
Cement prefab of the invention, cement cementitious material and preparation method thereof are made with reference to embodiments further
Detailed description.
The cement cementitious composite material of one: 0.03% graphene of embodiment-normal sand-
(1) graphene dispersion: polycarboxylate water-reducer 3:800 in mass ratio is soluble in water, after mixing evenly with graphene,
Graphene is added in polycarboxylate water-reducer mass ratio 3:10, and being sufficiently stirred makes graphene be dissolved in polycarboxylate water-reducer solution；
(2) mixing, with each material quality ratio: normal sand 50%, 42.5 cement 40% of normal silicate, 42.5 water of belite
Mud 10%, graphene 0.03%, polycarboxylate water-reducer 0.1% (graphene and polycarboxylate water-reducer outside cement quality to mix) will be former
Material mixing,
Mixing step are as follows: acquired solution will first be added in normal sand, mix slowly 5 minutes in step 1, after by common silicic acid
42.5 cement of salt, 42.5 cement of belite are added simultaneously, and stirring obtains mixture in 3 minutes.
Embodiment two: cement prefab
(1) forming processes, it is 160mm × 40mm × 40mm mold, concussion that the mixture in embodiment 1, which is transferred to specification,
5 minutes, die surface is struck off, is placed in 20 DEG C, is conserved 24 hours in 90% curing box of humidity；
(2) it demoulds and conserves, step 3 sample is removed from the mold, conserves, obtains in 20 DEG C, 90% curing box of humidity
To a kind of high strength graphite alkene-cement cementitious composite material.
(3) after tested, 28 days flexural strengths of this sample averagely can reach 15.7MPa, and maximum intensity is put down up to 16.4MPa
Equal compression strength is 51MPa.
The cement cementitious composite material of three: 0.04% graphenes of embodiment-normal sand-
(1) graphene dispersion: polycarboxylate water-reducer 3:800 in mass ratio is soluble in water, after mixing evenly with graphene,
Graphene is added in polycarboxylate water-reducer mass ratio 2:5, and being sufficiently stirred makes graphene be dissolved in polycarboxylate water-reducer solution；
(2) mixing, with each material quality ratio: normal sand 50%, 42.5 cement 40% of normal silicate, 42.5 water of belite
Mud 10%, graphene 0.04%, polycarboxylate water-reducer 0.1% (graphene and polycarboxylate water-reducer outside cement quality to mix) will be former
Material mixing,
Mixing step are as follows: acquired solution will first be added in normal sand, mix slowly 5 minutes in step 1, after by common silicic acid
42.5 cement of salt, 42.5 cement of belite are added simultaneously, and stirring obtains mixture in 3 minutes.
Example IV: cement prefab
(1) forming processes, it is 160mm × 40mm × 40mm mold, concussion that the mixture in embodiment 3, which is transferred to specification,
5 minutes, die surface is struck off, is placed in 20 DEG C, is conserved 24 hours in 90% curing box of humidity；
(2) it demoulds and conserves, step 3 sample is removed from the mold, conserves, obtains in 20 DEG C, 90% curing box of humidity
To a kind of high strength graphite alkene-cement cementitious composite material.
(3) after tested, 28 days flexural strengths of this sample averagely can reach 15.3MPa, and maximum intensity is put down up to 16.0MPa
Equal compression strength is 51.88MPa.
The cement cementitious composite material of five: 0.02% graphenes of embodiment-iron tailings-
(1) graphene dispersion: polycarboxylate water-reducer 3:800 in mass ratio is soluble in water, after mixing evenly with graphene,
Graphene is added in polycarboxylate water-reducer mass ratio 1:5, and being sufficiently stirred makes graphene be dissolved in polycarboxylate water-reducer solution；
(2) mixing, with each material quality ratio: iron tailings 50%, 42.5 cement 40% of normal silicate, 42.5 water of belite
Mud 10%, graphene 0.02%, polycarboxylate water-reducer 0.1% (graphene and polycarboxylate water-reducer outside cement quality to mix) will be former
Material mixing, mixing step are as follows: acquired solution will first be added in normal sand, mix slowly 5 minutes in step 1, after by common silicic acid
42.5 cement of salt, 42.5 cement of belite are added simultaneously, and stirring obtains mixture in 3 minutes.
Embodiment six: cement prefab
(1) forming processes, it is 160mm × 40mm × 40mm mold, shake that the mixture in embodiment five, which is transferred to specification,
It swings 5 minutes, die surface is struck off, be placed in 20 DEG C, conserved 24 hours in 90% curing box of humidity；
(2) it demoulds and conserves, step 3 sample is removed from the mold, conserves, obtains in 20 DEG C, 90% curing box of humidity
To a kind of high strength graphite alkene-cement cementitious composite material.
(3) after tested, 28 days flexural strengths of this sample averagely can reach 14.8MPa, and maximum intensity is put down up to 15.2MPa
Equal compression strength is 65.32MPa.
Comparative example 1
The cement cementitious composite material of normal sand-
(1) mixing, with each material quality ratio: normal sand 50%, 42.5 cement 40% of normal silicate, 42.5 water of belite
Mud 10%, polycarboxylate water-reducer 0.1% (polycarboxylate water-reducer outside cement quality to mix) mix raw material,
Mixing step are as follows: polycarboxylate water-reducer, 42.5 cement of normal silicate, 42.5 cement of belite are added simultaneously,
Stirring obtains mixture (the cement cementitious composite material of normal sand -) in 3 minutes.
The cement prefab that concrete is made according to two method of embodiment, 28 days flexural strength 12.8MPa, pressure resistance
Spend 51.32MPa.
Comparative example two
The cement cementitious composite material of iron tailings-
(1) mixing, with each material quality ratio: iron tailings 50%, 42.5 cement 40% of normal silicate, 42.5 water of belite
Mud 10%, polycarboxylate water-reducer 0.1% (polycarboxylate water-reducer outside cement quality to mix) mix raw material.
Mixing step are as follows: iron tailings, polycarboxylate water-reducer, 42.5 cement of normal silicate, 42.5 cement of belite is same
When be added, stirring obtains mixture in 3 minutes.
Cement prefab
(1) forming processes, it is 160mm × 40mm × 40mm mold, shake that the mixture in embodiment five, which is transferred to specification,
It swings 5 minutes, die surface is struck off, be placed in 20 DEG C, conserved 24 hours in 90% curing box of humidity；
(2) it demoulds and conserves, step 3 sample is removed from the mold, conserves, obtains in 20 DEG C, 90% curing box of humidity
To a kind of high strength graphite alkene-cement cementitious composite material.
(3) after tested, 28 days flexural strengths of this sample averagely can reach 11.20MPa, and mean compressive strength is
65.32MPa。
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that without departing substantially from of the invention
Many other change and modification can be made in the case where spirit and scope.It is, therefore, intended that in the following claims
Including belonging to all such changes and modifications in the scope of the invention.
Claims (10)
1. a kind of cement cementitious material, which is characterized in that including cement base-material, grapheme material and polycarboxylate water-reducer, and
The dosage of the grapheme material is the 0.02~0.04% of the cement base-material quality, and the cement base-material includes aggregate, silicon
Acid salt cement, belite cement.
2. cement cementitious material according to claim 1, which is characterized in that the aggregate includes normal sand, in iron tailings
One or two.
3. cement cementitious material according to claim 1, which is characterized in that the grapheme material includes graphene, oxygen
One of graphite alkene, redox graphene are a variety of.
4. cement cementitious material according to claim 1, which is characterized in that the dosage of the grapheme material is the water
The 0.025~0.036% of mud base quality.
5. a kind of production method of the cement cementitious material as described in any one of Claims 1 to 4, which is characterized in that institute
Stating production method includes:
The dispersion liquid for being dispersed with the grapheme material is provided, and also contains the polycarboxylate water-reducer in the dispersion liquid,
In, the polycarboxylate water-reducer is provided in the form being dissolved in water；
The cement base-material is mixed with the dispersion liquid.
6. cement cementitious material according to claim 5, which is characterized in that mix the cement base-material and the dispersion liquid
Method include: that the aggregate in the cement base-material is blended in the dispersion liquid, then will be in the cement base-material
The portland cement, the belite cement are mixed into the dispersion liquid.
7. cement cementitious material according to claim 6, which is characterized in that mix the aggregate in the cement base-material
Conjunction is stirred in the dispersion liquid with First Speed, by the portland cement, the belite water in the cement base-material
Mud is stirred when being mixed into the dispersion liquid with second speed, and the First Speed is less than the second speed.
8. a kind of cement prefab, which is characterized in that the cement prefab is used such as any one of Claims 1 to 4 institute
The cement cementitious material stated is made.
9. the production method of cement prefab as claimed in claim 8, which is characterized in that the production method includes:
The cement cementitious material is accumulated in a mold with desired shape；In temperature after the cement cementitious material standing solidification
Degree is 20 DEG C, relative humidity conserves 24 hours under conditions of being 90%.
10. the production method of cement prefab according to claim 9, which is characterized in that the cement cementitious material quilt
It is transferred to after the mold, before carrying out standing solidification, also the cement cementitious material is shaken close to improve accumulation
Degree.
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| CN110357482A (en) * | 2019-07-23 | 2019-10-22 | 杭州高烯科技有限公司 | A kind of composite superplasticizer and preparation method thereof containing graphene oxide microballoon |
| CN115279711A (en) * | 2019-10-14 | 2022-11-01 | 希克里特技术有限责任公司 | Cementitious composite treated with carbon-based nanomaterials |
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Application publication date: 20181218 |