CN108249843A - The cement-base composite material and manufacturing method that a kind of nanometer titanium dioxide silica aerogel assorted fibre is modified - Google Patents
The cement-base composite material and manufacturing method that a kind of nanometer titanium dioxide silica aerogel assorted fibre is modified Download PDFInfo
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- CN108249843A CN108249843A CN201611232168.0A CN201611232168A CN108249843A CN 108249843 A CN108249843 A CN 108249843A CN 201611232168 A CN201611232168 A CN 201611232168A CN 108249843 A CN108249843 A CN 108249843A
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- cement
- titanium dioxide
- nanometer titanium
- composite material
- aerogel
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/064—Silica aerogel
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
The cement-base composite material and preparation method being modified the invention discloses a kind of nanometer titanium dioxide silica aerogel assorted fibre, belong to cement-base composite material field.The present invention is made of portland cement, flyash, fine sand, water-reducing agent, nano silicon dioxide aerogel composite, water.Cement-base composite material of the present invention solves the problems, such as that nanometer titanium dioxide aerogel particles uniformly disperse in cement-based material, and pass through the multiple modified effect of nanometer titanium dioxide silica aerogel and assorted fibre, realize cement-based material heat preservation, fire prevention, structural behaviour integration.Described material and preparation method thereof has the characteristics that implementation is simple, construction is quick, strong applicability, can be widely used for the construction, reparation and reinforcing of architectural engineering, traffic engineering, hydraulic engineering, offshore engineering etc..
Description
Technical field
Patent of the present invention belongs to cement-base composite material field.
Background technology
Nanometer titanium dioxide silica aerogel is a kind of novel light porous nanometer material, with using solvent as the wet of decentralized medium
Prepared by gel difference is the solvent in a kind of original skeleton with air substitution lightweight nanoscale porous material, it is by glue
Body particle or high-polymer molecular, which mutually coalesce, forms nanoporous network structure, and the one of gaseous state decentralized medium is full of in hole
Kind high dispersive solid-state material has continuous random network structure, is typical fractal structure.Nanometer titanium dioxide under normal temperature and pressure
The thermal conductivity factor of silica aerogel is down to 0.017W/mK, less than the thermal conductivity factor 0.026W/mK of air, therefore since it is strong
Big heat-proof quality is becoming a kind of novel heat-barrier material.The density of nanometer titanium dioxide silica aerogel generally uses bulk density
It characterizes, this numerical value can be down to 0.003g/cm3, this causes nanometer titanium dioxide silica aerogel to become synthesis most light at present and consolidate
Body material.The maturation of nanometer titanium dioxide silica aerogel preparation process, is taken seriously in recent years, but by nano silicon dioxide gas
Technology in terms of gel is used for modified cement-based material property is not yet very ripe, is primarily present following technical barrier：1)
Due to the nano-meter characteristic of nanometer titanium dioxide aerogel particles, how to be evenly dispersed into cement-based material；2) it will receive
During rice silica aerogel particles incorporation cement-based material, nanometer titanium dioxide silica aerogel itself knot such as why not is destroyed
Structure；3) nanometer titanium dioxide silica aerogel is incorporated into cement-based material, how is reducing cement-based material mechanics less as far as possible
In the case of performance, cement-based material insulated fire performance is substantially improved.
Adding of fiber is the common method for improving cement-based material cracking phenomena, improving its toughness.In general, cement base
Material has the structure feature of multiple dimensioned level in itself, and Single Fiber enhancing effect is extremely limited.Using different performance, scale
Fiber hybrid enhances, and the performance of fiber in itself can be made abundant on the different structure level, performance level of cement-base composite material
It plays, realizes that the function with strengthening is split in resistance step by step.Cement-based material belongs to non-combustible materials, is not generated (under high temperature) in a fire
Smog and toxic gas, but the physics and chemical change that cement-based material itself occurs under high temperature make structure generate serious break
It is bad, its durability and safety are reduced, and easily burst, mix certain fiber or raising porosity resists material
Explosion performance makes moderate progress.General fibre leaves material a large amount of structures after direct decomposition gasification in pyroprocess and lacks in itself
It falls into, in order to realize cement-based material heat preservation, fire prevention, structural behaviour integration, the unsolved technical problem of the prior art can be with
It is divided into the following aspects：1) fiber how to be made to be left after leaving the defects of less or even high temperature to material structure after high temperature
Substance can promote material structure performance；2) how nanometer titanium dioxide silica aerogel, assorted fibre to be mixed together and uniformly divided
It is dispersed in cement-based material.
Invention content
Present invention technical problems to be solved first are to provide that one kind can high temperature resistant, thermal insulation be good, have certain mechanics
The cement-base composite material that the nanometer titanium dioxide silica aerogel assorted fibre of performance is modified.For this purpose, the present invention uses following technology
Scheme：
The cement-base composite material that a kind of nanometer titanium dioxide silica aerogel assorted fibre is modified, which is characterized in that by silicic acid
Salt cement, flyash, fine sand, water-reducing agent, nano silicon dioxide aerogel composite and water composition；Its mixture each component
Mass fraction be：Portland cement 10~15, flyash 40~55, fine sand 10~15, water-reducing agent 0.10~0.20, nanometer
Silicon dioxide silica aerogel composite material 1.5~3.5, water supply 100 parts；The nano silicon dioxide aerogel composite mixes
There are organic fiber and inorfil.
Second technical problems to be solved of the invention are to provide the nano-silica that a kind of high temperature resistant can simultaneously disperse in water
SiClx aerogel composite.For this purpose, the present invention uses following technical scheme：
Nano silicon dioxide aerogel composite is by nanometer titanium dioxide aerogel particles, organic fiber, inorfil
And adhesive composition；Nano silicon dioxide aerogel composite dry density is 0.1~0.25g/cm3, wherein nano-silica
SiClx aerogel particle content volume percentage is 20%-50%, organic fiber and inorfil diameter at 0.1 μm~100 μm.
Nano silicon dioxide aerogel composite high temperature resistant of the present invention can simultaneously uniformly disperse in water, mix cement matrix
During material, nanometer titanium dioxide silica aerogel self structure is not destroyed, it can be in the feelings for not influencing Mechanical Properties of Cement-based Materials
Under condition, cement-based material insulated fire performance is substantially improved.
Further, the portland cement be P.O.52.5 cement, flyash be I grades of flyash, the maximum of fine sand
Grain size is not more than 0.5mm, and water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid, and water is drinking public water supply.
The present invention another the technical problem to be solved is that provide a kind of nanometer titanium dioxide silica aerogel assorted fibre to change
The manufacturing method of the cement-base composite material of property, can be evenly dispersed into water by nanometer titanium dioxide silica aerogel and assorted fibre
In cement-based material, and nano silicon dioxide aerogel composite self structure is not influenced.For this purpose, the present invention uses following technology
Scheme：
A kind of manufacturing method for the cement-base composite material that nanometer titanium dioxide silica aerogel assorted fibre is modified, feature exist
In preparing mixture in accordance with the following steps：
1) by the powders such as portland cement, flyash and fine sand be placed in premixing in blender it is uniform cementitious material powder
Material；
2) nano silicon dioxide aerogel composite, the batched water of 30%-50%, high efficiency water reducing agent are placed in stirring
It is stirred in machine, forms nano silicon dioxide aerogel composite suspension；
3) nano silicon dioxide aerogel composite suspension is poured into the uniform cementitious material powder of premixing, added in
Remaining batched water, stirs evenly, and obtains fresh mixture；
Step (1), (2) are in no particular order.
Further, the preparation method is further comprising the steps of：
4) fresh mixture is poured into one or more times in mold, every layer of more than the 0.5min that vibrates；
5) it is poured, form removal after maintenance more than 48h, and is 20 DEG C ± 3 DEG C in temperature, humidity is supported in being 90% ± 5%
It protects to required age.
For example, fresh mixture is poured into wall form, it can obtain that there is heat preservation after maintenance, prevent fires, is structural
The integrated wall of energy, construction are more convenient.
The cement-base composite material that nanometer titanium dioxide silica aerogel assorted fibre of the present invention is modified has the following advantages：
1) the material room temperature lower density be 1.0g/cm3~2.0g/cm3, compression strength >=5.0MPa, flexural strength >=
2.0MPa；Under ISO834 standard heating curves, for high-temperature process after 1 hour, density of material is 0.50g/cm3~1.50g/cm3,
Material does not occur Decrepitation Phenomena, compression strength >=5.0MPa, flexural strength >=2.0MPa.
2) material thermal conductivity factor under normal temperature state is 0.20W/mK~0.40W/mK.
Technical solution using the present invention, can prepare while there is heat preservation, fire prevention, the integrated cement base of structural behaviour
Composite material.The material and preparation method of the present invention has the characteristics that implement simple, quick, strong applicability of constructing, can use extensively
In the construction, reparation and reinforcing of architectural engineering, traffic engineering, hydraulic engineering, offshore engineering etc..
Description of the drawings
Fig. 1 is material of the present invention test specimen schematic device in Heat-Insulation Test.
Fig. 2 is nanometer titanium dioxide aerogel particles micro-structure diagram of the present invention.
Fig. 3 is nano silicon dioxide aerogel composite micro-structure diagram of the present invention.
Fig. 4 is that (nano silicon dioxide aerogel composite is uniform for the micro-structure diagram of cement-base composite material of the present invention
It is dispersed in cement-based material).
Fig. 5 is that (nano silicon dioxide aerogel composite is uniform for the micro-structure diagram of cement-base composite material of the present invention
It is dispersed in cement-based material).
Fig. 6 is cement-base composite material of the present invention as (2cm thickness thermal insulation layer) temperature rise curve internal after thermal insulation layer.
Fig. 7 is the submicroscopic structure figure of certain glass ceramics.
Fig. 8 is micro-structure diagram (porcelain phenomenon occur) after cement-base composite material high-temperature process of the present invention.
Specific embodiment
The specific embodiment of technical solution provided by the present invention is described further below in conjunction with the accompanying drawings, this implementation is real
Example is the description of the invention rather than any restriction is made to the present invention.
The present embodiment is nano silicon dioxide aerogel composite volume volume when being 40%, the nano silicon dioxide
The measure of cement-base composite material heat-proof quality, heat conductivility and mechanical property that aeroge assorted fibre is modified.
In the present embodiment nanometer titanium dioxide silica aerogel assorted fibre be modified cement-base composite material mixture composition into
Divide and include：Portland cement, flyash, fine sand, water, high-efficiency water-reducing agent of poly-carboxylic acid, nanometer titanium dioxide silica aerogel composite wood
Material；The each component mass ratio of mixture is portland cement：Flyash：Fine sand：Water：High-efficiency water-reducing agent of poly-carboxylic acid：Nanometer two
Silica aerogel composite material=11%：46%：12%：28%：0.2%：2.8%, the portland cement is P.O
52.5 cement, flyash are I grade flyash, and the maximum particle diameter of fine sand is not more than 0.5mm, and water is drinking public water supply, nanometer two
Silica aerogel composite material is made of nanometer titanium dioxide aerogel particles, organic fiber, inorfil and adhesive,
Its dry density is 0.2g/cm3, and wherein nano silicon dioxide aerogel particle volume content is 20%-25%, organic fiber and nothing
Machine fibre diameter is at 0.1 μm~100 μm.
The preparation process of the mixture is as follows：
The first step：The powders such as portland cement, flyash and fine sand are placed in blender more than stirring at low speed 4min；
Second step：Nano silicon dioxide aerogel composite, the mixing water of 30%-50%, high efficiency water reducing agent are placed in
Homogenizer high speed (1000-1500 turns/min) stirring more than 1min, forms nano silicon dioxide aerogel composite
Suspension；
Third walks：Nano silicon dioxide aerogel composite suspension is poured into the uniform cementitious material powder of premixing
More than 1min is stirred, adds remaining mixing water, fresh mixture is obtained after stirring more than 10min；
When further preparing cement-base composite material, it may include following steps：
4th step：Fresh mixture is divided to be poured into mold for 2-3 times and (is inserted into thermocouple, insulation thickness as shown in Figure 1
For 2cm), every layer of more than the 0.5min that vibrates；
5th step：It is poured, form removal after maintenance more than 48h, and (temperature is 20 DEG C ± 3 DEG C, and humidity is in standard conditions
90% ± 5%) it is conserved in required age.
If Fig. 2 is nanometer titanium dioxide aerogel particles microstructure, size is substantially in nanoscale to micron order, due to receiving
Rice material surface energy is larger, causes mutually to be packed together between particle.If Fig. 3 is nano silicon dioxide aerogel composite,
It was found that nanometer titanium dioxide aerogel particles are intertwined well by fiber, be conducive to be dispersed in cement-based material together
In.If Fig. 4,5 are the micro-structure diagram that nano silicon dioxide aerogel composite is dispersed in cement-based material, nanometer is found
Accumulating or mutually winding do not occur in silicon dioxide silica aerogel composite material, that is, is evenly dispersed in cement-based material, and can
To find still to there are a large amount of nanometer titanium dioxide aerogel particles to be bonded on fiber.
The test specimen for being inserted with thermocouple is placed on programmable hot test stove every sky (with ISO834 standard ramp cases to add
Heat) same position at, convenient for test specimen surrounding thermally equivalent, during experiment, by the reading for placing aerial thermocouple
Number reads the temperature inside test specimen, obtains temperature-time curve (as shown in Figure 6).3.0h or measuring point temperature are reached up to 700 when the time
DEG C when terminate to test, will test specimen remove high temperature furnace outside.
Thermal conductivity is carried out to the test specimen that size is 300mm × 300mm × 30mm using JW-III types heat-flow meter formula conductometer
It can test, measure thermal conductivity factor as 0.2614W/mK.
28d age test specimen compression strength is measured according to specification and bending strength is respectively 13.97MPa and 2.08MPa, according to
After ISO834 standard heating curve high-temperature process 1h, measure test specimen compression strength and bending strength be respectively 9.82MPa and
3.33MPa.It was found that nanometer titanium dioxide silica aerogel assorted fibre be modified cement-base composite material after high-temperature process, resistance to compression
Intensity only declines 29.71%, and ordinary cement sill, after high-temperature process 1h, intensity declines more than 50% substantially.As Fig. 7 is
The submicroscopic structure of certain glass ceramics, Fig. 8 are the cement-base composite material warp that nanometer titanium dioxide silica aerogel assorted fibre is modified
Cross high temperature treated microstructure, find it is internal there is large quantity micropore gap, and microstructure interconnects, i.e.,
There is the porcelain phenomenon similar with Fig. 7, be conducive to the promotion of self-strength, so after high-temperature process, flexural strength is compared with room temperature
It is lower promoted 60.10%, and ordinary cement sill after high-temperature process flexural strength substantially in below 1.0MPa.
In conclusion the cement-base composite material that nanometer titanium dioxide silica aerogel assorted fibre of the present invention is modified was both
Have good insulation flameproof effect, before and after high temperature again can keep good mechanical characteristic, be expected to realize keep the temperature, prevent fires,
Structural behaviour integration.
Claims (9)
1. the cement-base composite material that a kind of nanometer titanium dioxide silica aerogel assorted fibre is modified, which is characterized in that by silicate
Cement, flyash, fine sand, water-reducing agent, nano silicon dioxide aerogel composite and water composition；Its mixture each component
Mass fraction is：Portland cement 10~15, flyash 40~55, fine sand 10~15, water-reducing agent 0.10~0.20, nanometer two
Silica aerogel composite material 1.5~3.5, water supply 100 parts；The nano silicon dioxide aerogel composite is contaminated with
Organic fiber and inorfil.
2. the cement-base composite material that a kind of nanometer titanium dioxide silica aerogel assorted fibre according to claim 1 is modified,
It is characterized in that, nano silicon dioxide aerogel composite is by nanometer titanium dioxide aerogel particles, organic fiber, inorganic fibre
Dimension and adhesive composition；Nano silicon dioxide aerogel composite dry density is 0.1~0.25g/cm3, wherein nanometer two
Silica aerogel particles volume content is 20%-50%, organic fiber and inorfil diameter at 0.1 μm~100 μm.
3. the cement-base composite material that a kind of nanometer titanium dioxide silica aerogel assorted fibre according to claim 1 is modified,
It is characterized in that, the portland cement is P.O.52.5 cement, flyash is I grades of flyash, and the maximum particle diameter of fine sand is not
More than 0.5mm, water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid.
4. the cement-base composite material that a kind of nanometer titanium dioxide silica aerogel assorted fibre according to claim 1 is modified,
It is characterized in that, the density of the cement-base composite material is 1.0g/cm3~2.0g/cm3, compression strength >=5.0MPa, anti-folding
Intensity >=2.0MPa；Under ISO834 standard heating curves, high-temperature process is after 1 hour, density of material 0.50g/cm3~
1.50g/cm3, material do not occur Decrepitation Phenomena, compression strength >=5.0MPa, flexural strength >=2.0MPa.
5. the cement-base composite material that a kind of nanometer titanium dioxide silica aerogel assorted fibre according to claim 1 is modified,
It is characterized in that, cement-base composite material thermal conductivity factor under normal temperature state is 0.20W/mK~0.40W/mK.
6. the cement-base composite material that a kind of nanometer titanium dioxide silica aerogel assorted fibre according to claim 1 is modified,
It is characterized in that there is heat preservation, fire prevention, the integrated material of structural behaviour simultaneously.
A kind of 7. nano silicon dioxide aerogel composite, which is characterized in that the nanometer titanium dioxide silica aerogel composite wood
Material is made of nanometer titanium dioxide aerogel particles, organic fiber, inorfil and adhesive；Nanometer titanium dioxide silica aerogel
Composite material dry density is 0.1~0.25g/cm3, wherein nanometer titanium dioxide aerogel particles content is percent by volume
20%-50%, organic fiber and inorfil diameter are at 0.1 μm~100 μm.
8. a kind of manufacturing method for the cement-base composite material that nanometer titanium dioxide silica aerogel assorted fibre is modified, feature exist
In preparing mixture in accordance with the following steps：
1) by the powders such as portland cement, flyash and fine sand be placed in premixing in blender it is uniform cementitious material powder；
2) nano silicon dioxide aerogel composite, the batched water of 30%-50%, high efficiency water reducing agent are placed in blender
Stirring forms nano silicon dioxide aerogel composite suspension；
3) nano silicon dioxide aerogel composite suspension is poured into the uniform cementitious material powder of premixing, added in remaining
Batched water, stir evenly, obtain fresh mixture；
Step (1), (2) are in no particular order.
9. the system of cement-base composite material that a kind of nanometer titanium dioxide silica aerogel assorted fibre as claimed in claim 8 is modified
Make method, which is characterized in that it is further comprising the steps of：
4) fresh mixture once or is several times poured into mold, every layer of more than the 0.5min that vibrates；
5) be poured, maintenance more than 48h after form removal, and temperature be 20 DEG C ± 3 DEG C, humidity be 90% ± 5% in conserve to
Required age.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187052A (en) * | 2018-11-14 | 2020-05-22 | 权熙文 | Preparation method of nano ceramic long-life lane color coating |
| CN112408876A (en) * | 2020-11-09 | 2021-02-26 | 西南科技大学 | Cement-based porous material based on silicon dioxide and preparation method thereof |
| CN112919924A (en) * | 2021-04-12 | 2021-06-08 | 陈长国 | High-strength lightweight concrete and preparation method thereof |
| CN113636808A (en) * | 2021-08-04 | 2021-11-12 | 苏州阔凭环保科技有限公司 | Self-cleaning cement-based composite material and production method thereof |
| CN115974474A (en) * | 2022-12-12 | 2023-04-18 | 中南大学 | Super-energy-absorbing and light cement-based composite material and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187052A (en) * | 2018-11-14 | 2020-05-22 | 权熙文 | Preparation method of nano ceramic long-life lane color coating |
| CN111187052B (en) * | 2018-11-14 | 2022-01-07 | 权熙文 | Preparation method of nano ceramic long-life lane color coating |
| CN112408876A (en) * | 2020-11-09 | 2021-02-26 | 西南科技大学 | Cement-based porous material based on silicon dioxide and preparation method thereof |
| CN112919924A (en) * | 2021-04-12 | 2021-06-08 | 陈长国 | High-strength lightweight concrete and preparation method thereof |
| CN112919924B (en) * | 2021-04-12 | 2022-12-16 | 毕节市通发电力电杆有限公司 | High-strength lightweight concrete and preparation method thereof |
| CN113636808A (en) * | 2021-08-04 | 2021-11-12 | 苏州阔凭环保科技有限公司 | Self-cleaning cement-based composite material and production method thereof |
| CN115974474A (en) * | 2022-12-12 | 2023-04-18 | 中南大学 | Super-energy-absorbing and light cement-based composite material and preparation method thereof |
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