CN107522505A - A kind of ultra-light heat insulation insulation material and preparation method thereof - Google Patents
A kind of ultra-light heat insulation insulation material and preparation method thereof Download PDFInfo
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- CN107522505A CN107522505A CN201610475373.3A CN201610475373A CN107522505A CN 107522505 A CN107522505 A CN 107522505A CN 201610475373 A CN201610475373 A CN 201610475373A CN 107522505 A CN107522505 A CN 107522505A
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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
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- 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
Abstract
The invention discloses a kind of ultra-light heat insulation insulation material and preparation method thereof, first with the hollow nature of galapectite, small molecule is in the symphysis of halloysite nanotubes cohesion into aerosil, and it is together in series, prepare the galapectite aeroge with tridimensional network, then foam concrete preparation method is utilized, a kind of ultra-light heat insulation insulation material is made.Technical scheme improves the bad performance of existing foam concrete low intensity, thermal and insulating performance, there is provided a kind of ultra-light heat insulation insulation material and preparation method thereof, is advantageous to significantly improve the high intensity and thermal and insulating performance of foamed concrete material.
Description
Technical field
The invention belongs to green construction material technical field, more particularly, is related to a kind of ultra-light heat insulation insulation material
And preparation method thereof.
Background technology
Industrialized process brings the progress of society to us, productivity greatly improves, but has also triggered one simultaneously
The energy crisis of series.With the day of the non-renewable resources such as aggravation year by year, tellurian fossil, fuel to energy extraction
Gradually exhausted, the alarm bell of energy crisis has been beaten.In recent years, energy problem caused countries in the world and more and more paid close attention to,
And one of four big vital conjunctures of facing mankind have been put into it.After the worldwide energy crisis of 1973 occurs, more people
Recognize such a fact：Immoderate exploitation, using the energy, finally necessarily cause energy crisis aggravation (《Foam coagulation
Soil material and engineer applied》, Tang Ming etc. writes, China Construction Industry Press, and 2013).In order to tackle the Energy situation of sternness, respectively
State has put into effect the policy of many solution energy crises, and these measures may be roughly divided into following two aspects：On the one hand it is：Concentrate
Substantial amounts of manpower, financial resources, it is directed to the research and development of novel environment-friendly material, constantly develops new recyclable materials replacement
Original high energy consumption product；On the other hand it is the industry to suitable replacements can not be found in a short time, reduces its energy consumption as far as possible, will
Its consumption to the energy is reduced to bottom line.It is rationally and effectively to break away from using the energy, the saving energy, reduction energy resource consumption
One of effective way of energy crisis.Building heat preservation heat-barrier material is the material base of building energy conservation, and the building of excellent performance is protected
Warm heat-barrier material and thermal insulation technology, can play a multiplier effect under construction.As the Chinese government saves to building
The not only reinforcement of dynamics can be paid attention to, ultralight foam concrete gradually shows it by its unique pore structure in heat preservation and insulation field
Important function, and obtained more and more extensive application (《Foam concrete》, Zhang Jusong etc. writes, and Harbin Institute of Technology publishes
Society, 2016).Application in terms of building heat preservation heat-insulating and energy-saving will be one of most important purposes of ultralight foam concrete.Bubble
Application of the foam concrete in terms of building energy conservation is specific as follows：1) roof heat insulation is heat-insulated；2) wallboard insulation；3) metope is incubated
It is heat-insulated；4) ground insulating.The porosity of foam concrete is higher, and its heat-insulating property is better, but its intensity will be poorer, past
Fiber is added in foam concrete can significantly improve its intensity, but can reduce its porosity, so as to reduce its heat-insulating property,
So for foam concrete, the raising of heat-insulating property and the raising of intensity are into a conspicuous contradiction.
The content of the invention
It is an object of the invention to overcome some the deficiencies in the prior art, improve existing foam concrete low intensity, protect
The bad performance of warm heat-proof quality, there is provided a kind of ultra-light heat insulation insulation material and preparation method thereof, be advantageous to significantly improve bubble
The high intensity and thermal and insulating performance of foam concrete material.
The technical purpose of the present invention is achieved by following technical proposals：
A kind of ultra-light heat insulation insulation material and preparation method thereof, is carried out as steps described below：
Step 1, the preparation of silica-galapectite aeroge
10-30 parts by weight tetraethyl orthosilicate and 80-100 parts by weight absolute ethyl alcohols are well mixed, 5-10 parts by weight are added dropwise
10-12mol/L of distilled water and 1-3 parts by weight hydrogen chloride the aqueous solution (i.e. hydrochloric acid, in the aqueous solution of every liter of hydrogen chloride, chlorination
The amount of the material of hydrogen), 30-60min, ultrasonic disperse 30-60min are persistently stirred, 5-10h is stood at 35-50 DEG C and carries out fully acid
Hydrolysis, 5-30 parts by weight galapectites are added, maintain vacuum to rise to normal pressure, Ran Houjia after 10-30min under 3000-4000Pa
Entering 0.1-2 parts by weight dimethylformamide and 1-3 parts by weight ammoniacal liquor, (ammoniacal liquor mass percent is 5-10wt%, i.e. ammonia is dissolved in
Water forms ammoniacal liquor, and ammoniacal liquor mass percent is ammonia quality/(ammonia quality+water quality)), stand 12-48h and obtain wet gel simultaneously
Make structure unstable in gel continue to react and solidify, add 80-90 parts by weight water into gel and 10-20 parts by weight are anhydrous
The mixed liquor of ethanol, aging 12-24h is stood, the gel after aging is rinsed into system after exclusion with absolute ethyl alcohol, will be produced
Thing is transferred to CO2With CO in supercritical extraction unit2It is dried at least at 35-50 DEG C of temperature and air pressure 7-10MPa for medium
2 hours.
In step 1, tetraethyl orthosilicate and absolute ethyl alcohol are well mixed, mixing speed is 150-300 turns/min, is stirred
It is 20-30min to mix the time.
In step 1, add distilled water and hydrochloric acid stirs, mixing speed is 150-300 turns/min.
In step 1, it is 2-5h to carry out the supercritical drying time.
Step 2, the preparation of foam concrete
0.1-1 parts by weight protein foaming agents are added to 20-80 parts by weight of deionized water, stirring to generation stable foam
And container bottom does not occur excreting water phenomenon, the protein foaming agent aqueous solution is obtained；5-30 parts by weight of cement, 1-20 parts by weight are given birth to
Lime, 0.1-5 parts by weight gypsum, 5-60min is mixed, makes dry powder blend uniform, adds 20-60 parts by weight deionizations
Water, 10-60min is mixed, obtains the mixture slurry of flow regime；By step 1 obtain 10-100 parts by weight of silica-angstrom
Lip river stone composite aerogel, the mixture slurry prepared and the protein foaming agent aqueous solution are mixed evenly, that is, obtain foam coagulation
Soil.
In step 2, protein foaming agent is saponin vegetable protein foaming agent.
In step 2,0.1-1 parts by weight protein foaming agents are added to 20-80 parts by weight of deionized water, stir 0.5-
3h, mixing speed are 100-150 revs/min, stir 1-20min under rotating speed 500-2000r/min afterwards.
In step 2, quick lime is calcareous quick lime, and dosage is 8-15 parts by weight.
In step 2, gypsum is plaster of Paris, and dosage is 1-4 parts by weight.
In step 2, cement is Portland cement, and PO strength grades are 42.5, and dosage is 10-20 parts by weight.
In step 2, by 5-30 parts by weight of cement, 1-20 weight parts of quicklime, 0.1-5 parts by weight gypsum, mix
20-40min, mixing speed are 100-150 turns per minute, make dry powder blend uniform, add 20-60 parts by weight of deionized water,
10-60min is mixed, mixing speed 500-800r/min, obtains the mixture slurry of flow regime.
In step 2, step 2 is obtained into 10-100 parts by weight of silica-galapectite composite aerogel, the mixing prepared
When slurry is mixed evenly with the protein foaming agent aqueous solution, mixing speed is 100-200 turns per minute, and mixing time is
1—10min。
Carry out in use, by obtained foam concrete slurry inject die trial in, the outer wall of die trial gently vibrate to
Foam concrete slurry Self-leveling, self-compaction, it is 80- in humidity with doctor blade surface after foam concrete injection die trial
Under the conditions of 90%, it is stripped after standing 24-48h under 20-25 degrees Celsius of normal temperature, is put into standard spray fog room and conserves 2-5 days
(being 24 hours daily).
In order to verify that silica successfully passes through halloysite nanotubes, we carry to modified galapectite sample cable-styled
The resultant product after being cleaned in device is taken to carry out infrared analysis.Fig. 1 is respectively the FTIR spectrograms of galapectite, galapectite aeroge,
In Fig. 1 (a) spectrogram, in 3621cm-1And 3704cm-1Two narrow peaks be-OH stretching vibrations, the two absworption peaks belong to respectively
The two kinds of oh group contained in galapectite：Outer oh group and interior oh group, in 1028cm-1Place occurs
The stretching vibration of Si-O keys, this is the Typical silicates structure in galapectite, in 464cm-1And 545cm-1The absworption peak at place then belongs to
In the outer surface SiO of galapectite2The characteristic absorption peak of middle Si-O flexural vibrations, in addition in 898cm-1Neighbouring characteristic absorption then should
For the characteristic absorption peak of Al-OH flexural vibrations；In the spectrogram of Fig. 1 (b) and galapectite aeroge, equally there are Si-O keys, remove
Outside this, in 2950cm-1There is C-H characteristic peaks, while 1273cm-1Place peak appearance indicate in modified galapectite occur-
CH3, 1427cm-1There is expression and occurs that alkane structure, 3510cm in place-1The corresponding N-H in place stretching vibration peak, with going out for superiors
Now absolutely prove that silica successfully passes through halloysite nanotubes.
Fig. 2 is the thermogravimetric curve of galapectite and galapectite aeroge, and galapectite has two weightless steps, in 110-150
Between DEG C, there is obvious weightlessness, should be the intermolecular free water of galapectite absorption, 450-550 DEG C of weightlessness for galapectite in itself
Decompose, two benches total weight loss is 20%；Compared to galapectite, galapectite aeroge is without the weightlessness of its first stage, this explanation
Modified galapectite aeroge hydrophobicity enhancing, is not easy to adsorb water；At 200-400 DEG C, the weightlessness of galapectite aeroge is to connect
The decomposed of branch MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 450-550 DEG C of weightlessness are intermolecular for galapectite itself
Water decomposition, it is MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride decomposed at 600-800 DEG C, its total weight loss is 40%；This two
The difference of the mass percent of kind sample is the mass ratio of the galapectite in grafting, and this illustrates that silica successfully passes through galapectite
Nanotube.
Silica-galapectite aeroge is observed by SEM, such as Fig. 3, galapectite, dioxy
SiClx is in homogeneously dispersed state, and the aeroge has halloysite nanotubes concurrently and connects the three-dimensional net structure to be formed and silica gas
The pore structure of gel, nano level cavity distribution is more uniform, and each component is uniformly distributed realization preferably microcosmic combination feelings
Condition.
Compared with prior art, technical solution of the present invention under vacuum, has first with the hollow nature of galapectite
Machine thing small molecule enters in halloysite nanotubes, and polymerize generation aerosil, so as to be together in series, prepares tool
There is the galapectite aeroge of tridimensional network, then using foam concrete preparation method, a kind of ultra-light heat insulation insulation is made
Material, be advantageous to significantly improve the high intensity and thermal and insulating performance of foamed concrete material.
Brief description of the drawings
Fig. 1 is the FTIR spectrum figure of product in the present invention, and wherein a is galapectite；B is galapectite aeroge.
Fig. 2 is the TG figures of galapectite and galapectite aeroge.
Fig. 3 is the SEM figures of silica-galapectite aeroge in the present invention.
Embodiment
Technical scheme is further illustrated with reference to specific embodiment.Protein foaming agent is saponin plant
Protein foaming agent, quick lime are calcareous quick lime, and gypsum is plaster of Paris, and cement is Portland cement, PO intensity etc.
Level is 42.5.Selection ultrasound or stirring are disperseed in the following embodiments, can carry out technique ginseng according to foregoing invention content
Several adjustment and use；Concentration of hydrochloric acid is 12mol/L, and ammoniacal liquor mass percent is 10wt%.
Embodiment 1
10g tetraethyl orthosilicates and 95g absolute ethyl alcohols are mixed into 20min, 5g distilled water and 3g hydrochloric acid is added dropwise, persistently stirs
60min, ultrasonic disperse 45min are mixed, standing 5h at 35 DEG C carries out abundant sour water solution, adds 28g galapectites, maintains vacuum to exist
Normal pressure is risen under 3000Pa after 30min, then adds 2g dimethylformamides and 2g ammoniacal liquor, 24h is stood and obtains wet gel and make
Unstable structure continues to react and solidified in gel, and the mixed liquor of 80g water and 16g absolute ethyl alcohols is added into gel, stands
Aging 12h, the gel after aging is rinsed into system after exclusion with absolute ethyl alcohol, product is transferred to CO2Overcritical extraction
Take and 5h is dried in device；0.7g protein foaming agents are added to 20g deionized waters, 1.5h are stirred, by protein foaming agent water
Solution stirs 1-20min under rotating speed 500r/min, does not occur excreting water phenomenon to generation stable foam and container bottom, by 18g
Cement, 1g lime, 0.1g gypsum, 5min is mixed, makes dry powder blend uniform, adds 55g deionized waters, mixed
10min, the mixture slurry of flow regime is obtained, 10g aeroges, mixture slurry and foams mix that step 1 obtains is stirred into 7min,
Then obtained foam concrete slurry is injected in die trial, gently vibrates to foam concrete slurry and flow automatically in the outer wall of die trial
Flat, self-compaction, after foam concrete injection die trial, with doctor blade surface, under the conditions of humidity is 85%, normal temperature stands 28h
After be stripped, be put into standard spray fog room and conserve 2 days.
Embodiment 2
15g tetraethyl orthosilicates and 85g absolute ethyl alcohols are mixed into 30min, 8g distilled water and 2g hydrochloric acid is added dropwise, persistently stirs
30min, ultrasonic disperse 30min are mixed, standing 7h at 40 DEG C carries out abundant sour water solution, adds 25g galapectites, maintains vacuum to exist
Normal pressure is risen under 3200Pa after 20min, then adds 1g dimethylformamides and 1.5g ammoniacal liquor, 36h is stood and obtains wet gel simultaneously
Make structure unstable in gel continue to react and solidify, the mixed liquor of 83g water and 18g absolute ethyl alcohols is added into gel, it is quiet
Aging 16h is put, the gel after aging is rinsed into system after exclusion with absolute ethyl alcohol, product is transferred to CO2It is overcritical
4.5h is dried in extraction equipment；0.6g protein foaming agents are added to 60g deionized waters, 1h are stirred, by protein foaming agent
The aqueous solution stirs 1-20min under rotating speed 1800r/min, does not occur excreting water phenomenon to generation stable foam and container bottom, will
15g cement, 18g lime, 3g gypsum, 45min is mixed, makes dry powder blend uniform, adds 60g deionized waters, mixing is stirred
40min is mixed, obtains the mixture slurry of flow regime, 30g aeroges, mixture slurry and foams mix that step 1 obtains are stirred
8min, then obtained foam concrete slurry is injected in die trial, gently vibrate to foam concrete and starch in the outer wall of die trial
Body Self-leveling, self-compaction, after foam concrete injection die trial, with doctor blade surface, under the conditions of humidity is 80%, normal temperature is quiet
It is stripped after putting 24h, is put into standard spray fog room and conserves 2.5 days.
Embodiment 3
20g tetraethyl orthosilicates and 80g absolute ethyl alcohols are mixed into 40min, 10g distilled water and 1g hydrochloric acid is added dropwise, is continued
50min, ultrasonic disperse 40min are stirred, standing 8h at 50 DEG C carries out abundant sour water solution, adds 20g galapectites, maintains vacuum to exist
Normal pressure is risen under 3500Pa after 15min, then adds 0.1g dimethylformamides and 2.5g ammoniacal liquor, 12h is stood and obtains wet gel
And make structure unstable in gel continue to react and solidify, the mixed liquor of 85g water and 20g absolute ethyl alcohols is added into gel,
Aging 24h is stood, the gel after aging is rinsed into system after exclusion with absolute ethyl alcohol, product is transferred to CO2It is super to face
4h is dried in boundary's extraction equipment；0.5g protein foaming agents are added to 50g deionized waters, 3h are stirred, by protein foaming agent
The aqueous solution stirs 1-20min under rotating speed 2000r/min, does not occur excreting water phenomenon to generation stable foam and container bottom, will
25g cement, 15g lime, 1g gypsum, 55min is mixed, makes dry powder blend uniform, adds 20g deionized waters, mixing is stirred
50min is mixed, obtains the mixture slurry of flow regime, 50g aeroges, mixture slurry and foams mix that step 1 obtains are stirred
10min, then obtained foam concrete slurry is injected in die trial, gently vibrate to foam concrete and starch in the outer wall of die trial
Body Self-leveling, self-compaction, after foam concrete injection die trial, with doctor blade surface, under the conditions of humidity is 88%, normal temperature is quiet
It is stripped after putting 36h, is put into standard spray fog room and conserves 3 days.
Embodiment 4
25g tetraethyl orthosilicates and 90g absolute ethyl alcohols are mixed into 50min, 7g distilled water and 2.5g hydrochloric acid is added dropwise, is continued
40min, ultrasonic disperse 50min are stirred, standing 10h at 45 DEG C carries out abundant sour water solution, adds 30g galapectites, maintains vacuum
Normal pressure is risen to after 25min under 4000Pa, then adds 1.5g dimethylformamides and 3g ammoniacal liquor, 48h is stood and obtains wet gel
And make structure unstable in gel continue to react and solidify, the mixed liquor of 88g water and 15g absolute ethyl alcohols is added into gel,
Aging 18h is stood, the gel after aging is rinsed into system after exclusion with absolute ethyl alcohol, product is transferred to CO2It is super to face
3h is dried in boundary's extraction equipment；1g protein foaming agents are added to 80g deionized waters, 2h are stirred, by protein foaming agent water
Solution stirs 1-20min under rotating speed 1500r/min, does not occur excreting water phenomenon to generation stable foam and container bottom, by 30g
Cement, 16g lime, 2g gypsum, 60min is mixed, makes dry powder blend uniform, adds 40g deionized waters, mixed
60min, the mixture slurry of flow regime is obtained, 70g aeroges, mixture slurry and foams mix that step 1 obtains is stirred into 1min,
Then obtained foam concrete slurry is injected in die trial, gently vibrates to foam concrete slurry and flow automatically in the outer wall of die trial
Flat, self-compaction, after foam concrete injection die trial, with doctor blade surface, under the conditions of humidity is 90%, normal temperature stands 40h
After be stripped, be put into standard spray fog room and conserve 5 days.
Embodiment 5
30g tetraethyl orthosilicates and 100g absolute ethyl alcohols are mixed into 60min, 6g distilled water and 1.5g hydrochloric acid is added dropwise, holds
Continuous stirring 35min, ultrasonic disperse 60min, stand 6h at 48 DEG C and carry out abundant sour water solution, add 5g galapectites, maintain vacuum
Normal pressure is risen to after 10min under 3600Pa, then adds 0.8g dimethylformamides and 1g ammoniacal liquor, 35h is stood and obtains wet gel
And make structure unstable in gel continue to react and solidify, the mixed liquor of 90g water and 10g absolute ethyl alcohols is added into gel,
Aging 20h is stood, the gel after aging is rinsed into system after exclusion with absolute ethyl alcohol, product is transferred to CO2It is super to face
2h is dried in boundary's extraction equipment；0.1g protein foaming agents are added to 70g deionized waters, 0.5h is stirred, protein is foamed
The agent aqueous solution stirs 1-20min under rotating speed 1000r/min, does not occur excreting water phenomenon to generation stable foam and container bottom,
By 5g cement, 20g lime, 5g gypsum, 25min is mixed, makes dry powder blend uniform, adds 30g deionized waters, mixing is stirred
20min is mixed, obtains the mixture slurry of flow regime, 100g aeroges, mixture slurry and foams mix that step 1 obtains are stirred
5min, then obtained foam concrete slurry is injected in die trial, gently vibrate to foam concrete and starch in the outer wall of die trial
Body Self-leveling, self-compaction, after foam concrete injection die trial, with doctor blade surface, under the conditions of humidity is 83%, normal temperature is quiet
It is stripped after putting 48h, is put into standard spray fog room and conserves 4.5 days.
Concrete sample prepared by above-described embodiment is tested (through maintenance), is had through Bei Shide instruments scientific and technological (Beijing)
The N2 adsorption specific surface area measuring instrument measure of limit company, the porosity of concrete prepared by this method is 92-96%, preferably 94-
95%, even aperture distribution, the hole that the mean free path (about 70nm) of gas molecule motion is more than galapectite aeroge is straight
Footpath 30-50nm, the results are shown in Table 1.Using Xi'an Xiatech Electronic Technology Co., Ltd. TC3000E types thermal conductivity factor instrument to our legal system
Standby concrete is tested, and the results are shown in Table 1, and concrete has extremely low heat conductivility, embodies very high thermal insulation, average
Thermal conductivity factor is up to 0.01-0.05W/ (mK).It is used as building heat preservation walling unit in view of concrete, goes out from structural requirement
Come, the test of compression strength is carried out according to GB50107-2010, the results are shown in Table 1, obtained foam concrete has good
Compressive property, it is average up to 160-230MPa.The concrete of the above-mentioned property test specification present invention is keeping preferable crushing resistance
While energy, porosity and thermal conductivity factor have been taken into account, has turned into building thermal insulation material, i.e., concrete of the invention is as building heat preservation
The application of material, as building heat preservation walling unit.
The porosity of table 1, thermal conductivity factor and compressive property
| Embodiment | Porosity/(%) | Thermal conductivity factor/(W/ (mK)) | Compression strength/(MPa) |
| Embodiment 1 | 92 | 0.02 | 160 |
| Embodiment 2 | 93 | 0.03 | 190 |
| Embodiment 3 | 94 | 0.01 | 180 |
| Embodiment 4 | 95 | 0.05 | 220 |
| Embodiment 5 | 91 | 0.04 | 230 |
Technological parameter according to technical solution of the present invention is adjusted the foam concrete that can obtain the present invention, and table
Reveal essentially identical property.
Exemplary description has been done to the present invention above, it should explanation, in the situation for the core for not departing from the present invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent substitution of creative work equal
Fall into protection scope of the present invention.
Claims (10)
1. a kind of ultra-light heat insulation insulation material, it is characterised in that carry out as steps described below：
Step 1, the preparation of silica-galapectite aeroge
10-30 parts by weight tetraethyl orthosilicate and 80-100 parts by weight absolute ethyl alcohols are well mixed, the distillation of 5-10 parts by weight is added dropwise
The aqueous solution of 10-12mol/L of water and 1-3 parts by weight hydrogen chloride, persistently stirs 30-60min, ultrasonic disperse 30-60min,
35-50 DEG C stands 5-10h and carries out abundant sour water solution, adds 5-30 parts by weight galapectites, maintains vacuum under 3000-4000Pa
Normal pressure is risen to after 10-30min, then adds 0.1-2 parts by weight dimethylformamide and 1-3 parts by weight ammoniacal liquor (ammoniacal liquor quality hundred
Fraction is 5-10wt%), stand 12-48h and obtain wet gel and make structure unstable in gel continue to react and solidify, to
The mixed liquor of 80-90 parts by weight water and 10-20 parts by weight absolute ethyl alcohols is added in gel, aging 12-24h is stood, after aging
Gel rinsed with absolute ethyl alcohol into system after exclusion, product is transferred to CO2With CO in supercritical extraction unit2To be situated between
Matter is dried at least 2 hours at 35-50 DEG C of temperature and air pressure 7-10MPa.
Step 2, the preparation of foam concrete
0.1-1 parts by weight protein foaming agents are added to 20-80 parts by weight of deionized water, stirring to generation stable foam and appearance
Device bottom does not occur excreting water phenomenon, obtains the protein foaming agent aqueous solution；By 5-30 parts by weight of cement, 1-20 parts by weight life stone
Ash, 0.1-5 parts by weight gypsum, 5-60min is mixed, makes dry powder blend uniform, adds 20-60 parts by weight of deionized water,
10-60min is mixed, obtains the mixture slurry of flow regime；Step 1 is obtained into 10-100 parts by weight of silica-Ai Luo
Stone composite aerogel, the mixture slurry prepared and the protein foaming agent aqueous solution are mixed evenly, that is, obtain foam concrete；
In step 2, protein foaming agent is saponin vegetable protein foaming agent, and quick lime is calcareous quick lime, and gypsum is paring stone
Cream, cement are Portland cement, and PO strength grades are 42.5.
2. a kind of ultra-light heat insulation insulation material according to claim 1, it is characterised in that in step 1, by positive silicic acid second
Ester and absolute ethyl alcohol are well mixed, and mixing speed is 150-300 turns/min, and mixing time is 20-30min；Add distilled water
Stirred with hydrochloric acid, mixing speed is 150-300 turns/min.
3. a kind of ultra-light heat insulation insulation material according to claim 1, it is characterised in that in step 1, carry out overcritical
Drying time is 2-5h.
4. a kind of ultra-light heat insulation insulation material according to claim 1, it is characterised in that in step 2, by 0.1-1 weights
Amount part protein foaming agent is added to 20-80 parts by weight of deionized water, stirs 0.5-3h, and mixing speed is 100-150 revs/min
Clock, stir 1-20min under rotating speed 500-2000r/min afterwards；Quick lime dosage is 8-15 parts by weight, gypsum dosage is 1-
4 parts by weight, cement consumption are 10-20 parts by weight.
5. a kind of ultra-light heat insulation insulation material according to claim 1, it is characterised in that in step 2, by 5-30 weight
Part cement, 1-20 weight parts of quicklime, 0.1-5 parts by weight gypsum, mix 20-40min, and mixing speed is per minute
100-150 turns, make dry powder blend uniform, add 20-60 parts by weight of deionized water, mix 10-60min, mixing speed
For 500-800r/min, the mixture slurry of flow regime is obtained；Step 1 is obtained into 10-100 parts by weight of silica-galapectite
When aeroge, the mixture slurry and the protein foaming agent aqueous solution that prepare are mixed evenly, mixing speed for per minute 100-
200 turns, mixing time is 1-10min.
6. a kind of preparation method of ultra-light heat insulation insulation material, it is characterised in that carry out as steps described below：
Step 1, the preparation of silica-galapectite aeroge
10-30 parts by weight tetraethyl orthosilicate and 80-100 parts by weight absolute ethyl alcohols are well mixed, the distillation of 5-10 parts by weight is added dropwise
The aqueous solution of 10-12mol/L of water and 1-3 parts by weight hydrogen chloride, persistently stirs 30-60min, ultrasonic disperse 30-60min,
35-50 DEG C stands 5-10h and carries out abundant sour water solution, adds 5-30 parts by weight galapectites, maintains vacuum under 3000-4000Pa
Normal pressure is risen to after 10-30min, then adds 0.1-2 parts by weight dimethylformamide and 1-3 parts by weight ammoniacal liquor (ammoniacal liquor quality hundred
Fraction is 5-10wt%), stand 12-48h and obtain wet gel and make structure unstable in gel continue to react and solidify, to
The mixed liquor of 80-90 parts by weight water and 10-20 parts by weight absolute ethyl alcohols is added in gel, aging 12-24h is stood, after aging
Gel rinsed with absolute ethyl alcohol into system after exclusion, product is transferred to CO2With CO in supercritical extraction unit2To be situated between
Matter is dried at least 2 hours at 35-50 DEG C of temperature and air pressure 7-10MPa；
Step 2, the preparation of foam concrete
0.1-1 parts by weight protein foaming agents are added to 20-80 parts by weight of deionized water, stirring to generation stable foam and appearance
Device bottom does not occur excreting water phenomenon, obtains the protein foaming agent aqueous solution；By 5-30 parts by weight of cement, 1-20 parts by weight life stone
Ash, 0.1-5 parts by weight gypsum, 5-60min is mixed, makes dry powder blend uniform, adds 20-60 parts by weight of deionized water,
10-60min is mixed, obtains the mixture slurry of flow regime；Step 1 is obtained into 10-100 parts by weight of silica-Ai Luo
Stone composite aerogel, the mixture slurry prepared and the protein foaming agent aqueous solution are mixed evenly, that is, obtain foam concrete；
In step 2, protein foaming agent is saponin vegetable protein foaming agent, and quick lime is calcareous quick lime, and gypsum is paring stone
Cream, cement are Portland cement, and PO strength grades are 42.5.
A kind of 7. preparation method of ultra-light heat insulation insulation material according to claim 6, it is characterised in that in step 1,
Tetraethyl orthosilicate and absolute ethyl alcohol are well mixed, mixing speed is 150-300 turns/min, and mixing time is 20-30min；
Add distilled water and hydrochloric acid stirs, mixing speed is 150-300 turns/min；The progress supercritical drying time is 2-5h.
A kind of 8. preparation method of ultra-light heat insulation insulation material according to claim 6, it is characterised in that in step 2,
0.1-1 parts by weight protein foaming agents are added to 20-80 parts by weight of deionized water, stir 0.5-3h, mixing speed is 100-
150 revs/min, stir 1-20min under rotating speed 500-2000r/min afterwards；Quick lime dosage is 8-15 parts by weight, gypsum
Dosage is 1-4 parts by weight, and cement consumption is 10-20 parts by weight.
A kind of 9. preparation method of ultra-light heat insulation insulation material according to claim 6, it is characterised in that in step 2,
By 5-30 parts by weight of cement, 1-20 weight parts of quicklime, 0.1-5 parts by weight gypsum, 20-40min is mixed, mixing speed is
100-150 turns per minute, make dry powder blend uniform, add 20-60 parts by weight of deionized water, mix 10-60min, stir
It is 500-800r/min to mix speed, obtains the mixture slurry of flow regime；By step 1 obtain 10-100 parts by weight of silica-
When galapectite aeroge, the mixture slurry prepared and the protein foaming agent aqueous solution are mixed evenly, mixing speed is every point
100-200 turns of clock, mixing time are 1-10min.
10. application of the ultra-light heat insulation insulation material as claimed in claim 1 as building thermal insulation material, it is characterised in that use
Make building heat preservation walling unit, porosity 92-96%, preferably 94-95%, even aperture distribution, mean coefficient of heat conductivity is reachable
0.01-0.05W/ (mK), compressive property is average up to 160-230Mpa, is carrying out in use, the foam concrete that will be obtained
In slurry injection die trial, gently vibrated to foam concrete slurry Self-leveling, self-compaction, foam concrete note in the outer wall of die trial
After entering die trial, with doctor blade surface, under the conditions of humidity is 80-90%, after standing 24-48h under 20-25 degrees Celsius of normal temperature
The demoulding, it is put into standard spray fog room and conserves 2-5 days (being 24 hours daily).
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