CN109231913A - A kind of preparation method of Cementitious materials of absorbing noise - Google Patents
A kind of preparation method of Cementitious materials of absorbing noise Download PDFInfo
- Publication number
- CN109231913A CN109231913A CN201811143598.4A CN201811143598A CN109231913A CN 109231913 A CN109231913 A CN 109231913A CN 201811143598 A CN201811143598 A CN 201811143598A CN 109231913 A CN109231913 A CN 109231913A
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- Prior art keywords
- sound
- absorbing
- cementitious materials
- preparation
- expanded perlite
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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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of preparation methods of Cementitious materials of absorbing noise, belong to sound-absorbing material preparation technical field.The present invention is to have the expanded perlite of abundant microcellular structure as raw material, utilize its pore structure abundant and huge specific surface area, mould solution reaction is blended with corn stalk fiber, mould solution modification is carried out using mould microorganism, spice is carried out after this modified pearl rock is added in ordinary portland cement, since expanded perlite has pore structure abundant, and water imbibition is extremely strong, in stirring pouring molding, water can enter in the hole of perlite, the air in micropore is discharged, the gas of discharge is spread in cement slurry, form some connection stomatas, this also further increases the sound absorbing performance of final sound-absorbing material obtained, finally Cementitious materials of absorbing noise porosity obtained is high by the present invention, sound-absorption coefficient is big, with splendid sound-absorbing effect, it has a extensive future.
Description
Technical field
The present invention relates to a kind of preparation methods of Cementitious materials of absorbing noise, belong to sound-absorbing material preparation technical field.
Background technique
Sound-absorbing material is the material with stronger absorption sound energy, reducing noise performance.Porosity, film by means of itself
Effect or resonant interaction and can have the material of absorption to incident sound, one of the element of ultrasonography equipment.Absorb sound material
Material will be matched with the acoustic characteristic impedance of the sound bearing medium of surrounding, enter sound-absorbing material with enabling sound areflexia, and enable incident sound
The overwhelming majority is absorbed.
Sound-absorbing material generallys use resonance sound-absorbing structure or gradual transition layer structure in application mode.In order to improve material
The internal loss of material, be generally mixed into the filler containing a large amount of bubbles in the material or increase metal microbead etc..In each of transducer array
The noise elimination covering treatment of sound insulation decoupling, the sound absorption block at the energy converter back side, filling liquid transducer chamber inner wall and component between array element,
In the structures such as the inner wall sound absorption veneer of anechoic tank, it is frequently utilized that sound-absorbing material improves its acoustical behavior.
Sound-absorbing material is divided by material: the fabrics abatvoix of indoor sound-absorbing material, and cotton clothes' abatvoix is using global public
That recognizes has the stronger centrifugally glass-wool of sound-absorbing effect, and this material is widely used in the production of sound-absorbing material industry.Room
The sound-absorbing metal plate of interior sound-absorbing material, if selecting sound-absorbing metal plate as indoor sound-absorbing material and fabulous.Metal
Aperture there are many above abatvoix, here it is so-called metal piercing abatvoixs.The Wooden sound-absorbing plate of indoor sound-absorbing material,
It is the one of which of indoor sound-absorbing material.Wooden sound-absorbing plate makes using wood materials, is added to one layer on its surface layer
Sound-absorbing material, the wooden principle of surface reduction, cashes to obtain primitive simplicity and nature.
In building common sound-absorbing material have foamed plastics, UF foamed plastics, industrial felt, foam glass, mineral wool,
Mineral wool, asphalt slag wool, cement expanded perlite plate, gypsum mortar (water mixing mud and glass fibre), cement mortar, brick are (clear
Waterwall face), cork sheet etc., each sound-absorbing material under its thickness, bulk density, each frequency acoustic absorptivity and installation situation have
It is required that.Existing Cementitious materials of absorbing noise porosity is low, and acoustic absorptivity is small, manufactured sound-absorbing material sound-absorbing effect is poor.
Therefore, it is high to invent a kind of porosity, the good Cementitious materials of absorbing noise of sound absorption effect is to sound-absorbing material technology of preparing neck
Domain has positive effect.
Summary of the invention
The technical problems to be solved by the invention, it is low for Cementitious materials of absorbing noise itself porosity traditional at present, it inhales
Phonetic system number is small, and the defect of manufactured sound-absorbing material sound-absorbing effect difference provides a kind of preparation method of Cementitious materials of absorbing noise.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
A kind of preparation method of Cementitious materials of absorbing noise, it is characterised in that specific preparation step are as follows:
(1) it weighs expanded perlite and is put into pulverizer and crush 20~30min and cross 50 meshes and obtain expanded perlite crushed material, then
Corn stover is put into after crushing 1~2h in Material disintegrator and is sieved with 100 mesh sieve, obtained corn stalk powder and mince, by swelling perlite powder
Mince with corn stalk powder mince and deionized water mixing after be standing and soaking 2~3 days, obtain soak；
(2) above-mentioned soak is filtered, separation removal filtrate obtains filter residue, obtained filter residue is put into ceramic pot, then to pottery
Trichoderma atroviride bacterium bacteria suspension is added in porcelain jar, obtains pre-composition after mixing evenly；
(3) the above-mentioned ceramic pot equipped with pre-composition is put into mould solution reaction chamber, the mouldy reaction of heat and moisture preserving 10~12 days is mouldy
Mouldy product, as modified expanded perlite are taken out after reaction；
(4) according to parts by weight, weigh 50~60 parts of ordinary portland cements, 15~20 parts of above-mentioned modified expanded perlites, 1~
It is put into batch mixer after 2 parts of rosin soaps, 1~2 part of lignin and 50~55 parts of water mixing, is stirred to obtain prefabricated slurry；
(5) by prefabricated slurry injection stainless steel mould obtained above, baking oven, dry solidification, solidification are put into after injection
After demould up to Cementitious materials of absorbing noise.
Expanded perlite crushed material and corn stalk powder as described in step (1) mince and the mass ratio of deionized water is
2:1:10。
Concentration described in step (2) is 108The additional amount of the Trichoderma atroviride bacterium bacteria suspension of cfu/mL is filter residue quality
10%。
The temperature of mould solution reaction chamber described in step (3) is 25~30 DEG C, and relative air humidity is 50~60%.
The revolving speed being stirred described in step (4) is 50~60r/min, and the time being stirred is 15~20min.
The temperature of dry solidification described in step (5) is 105~110 DEG C, and the time of dry solidification is 10~12h.
The beneficial effects of the present invention are:
The present invention is mixed and is soaked in water after crushing the two using expanded perlite and corn stover as raw material, then by soak
Mould solution reaction is mixed with Trichoderma atroviride bacterium, expanded perlite is modified using mould, obtains modified expanded perlite, to change
Property expanded perlite be spike, using ordinary portland cement as base-material, injection molding after mixing is absorbed sound up to cement base after dry solidification
Material, the present invention utilize its pore structure abundant and huge to have the expanded perlite of abundant microcellular structure as raw material
Mould solution reaction is blended with corn stalk fiber, mould solution modification is carried out using mould microorganism, due to corn stalk for specific surface area
Stalk mould in mould solution reaction process is generated active group by mould and is loaded in its growth course in growth and development
The expanded perlite surface of high-specific surface area to form portion of cellulose and hemicellulose and be adsorbed to swollen since corn stover is degraded
Swollen perlite material pore interior makes original expanded perlite material internal hole become coarse more pleats, utilizes expanded pearlite
Sound absorption occurs for the cavity resonance effect of rock internal pore structure, while the introducing of long chain cellulose is so that expanded perlite material
Material internal void becomes coarse more pleats, hinders sound wave transmitting, and the vibration of cellulose long-chain can also can convert kinetic energy for sound,
To weaken sound, the sound absorption sound insulation value of expanded perlite is further increased, normal silicate is added in this modified pearl rock
Spice is carried out after in cement, since expanded perlite has pore structure abundant, and water imbibition is extremely strong, pours and builds up in stirring
In type, water can enter in the hole of perlite, and the air in micropore is discharged, and the gas of discharge is spread in cement slurry, be formed
Some connection stomatas, this also further increases the sound absorbing performance of final obtained sound-absorbing material, the final water obtained of the present invention
Mud base sound-absorbing material porosity is high, and sound-absorption coefficient is big, has splendid sound-absorbing effect, has a extensive future.
Specific embodiment
It weighs expanded perlite and is put into pulverizer and crush 20~30min and cross 50 meshes and obtain expanded perlite crushed material,
Corn stover is put into again after crushing 1~2h in Material disintegrator and is sieved with 100 mesh sieve, obtained corn stalk powder and mince, by expanded perlite
Crushed material and corn stalk powder mince and deionized water is to be standing and soaking 2~3 days after 2:1:10 is mixed in mass ratio, are soaked
Steep object；Above-mentioned soak is filtered, separation removal filtrate obtains filter residue, obtained filter residue is put into ceramic pot, then to ceramics
The concentration that filter residue quality 10% is added in tank is 108The Trichoderma atroviride bacterium bacteria suspension of cfu/mL, obtains pre-composition after mixing evenly；
It is 25~30 DEG C that the above-mentioned ceramic pot equipped with pre-composition, which is put into temperature, the mould solution reaction chamber that relative air humidity is 50~60%
In, the mouldy reaction of heat and moisture preserving 10~12 days is mouldy to take out mouldy product, as modified expanded perlite after reaction；It presses
Parts by weight meter weighs 50~60 parts of ordinary portland cements, 15~20 parts of above-mentioned modified expanded perlites, 1~2 part of rosin
It is put into batch mixer after soap, 1~2 part of lignin and the mixing of 50~55 parts of water, 15 are stirred with the revolving speed of 50~60r/min~
20min obtains prefabricated slurry；By in prefabricated slurry injection stainless steel mould obtained above, baking oven is put into after injection,
10~12h of dry solidification at 105~110 DEG C is demoulded after solidification up to Cementitious materials of absorbing noise.
It weighs expanded perlite and is put into pulverizer to crush 20min and cross 50 meshes and obtain expanded perlite crushed material, then will
Corn stover is put into crush 1h in Material disintegrator after sieve with 100 mesh sieve, obtain corn stalk powder and mince, by expanded perlite crushed material and
Corn stalk powder minces and deionized water is to be standing and soaking 2 days after 2:1:10 is mixed in mass ratio, obtains soak；It will be above-mentioned
Soak filtering, separation removal filtrate obtain filter residue, obtained filter residue are put into ceramic pot, then filter residue is added into ceramic pot
The concentration of quality 10% is 108The Trichoderma atroviride bacterium bacteria suspension of cfu/mL, obtains pre-composition after mixing evenly；By above-mentioned equipped with pre-
It is 25 DEG C that the ceramic pot of mixed object, which is put into temperature, in the mould solution reaction chamber that relative air humidity is 50%, the mouldy reaction 10 of heat and moisture preserving
It, it is mouldy to take out mouldy product, as modified expanded perlite after reaction；According to parts by weight, 50 parts of ordinary silicons are weighed
Batch mixer is put into after acid salt cement, 15 parts of above-mentioned modified expanded perlites, 1 part of rosin soap, 1 part of lignin and 50 parts of water mixing
In, 15min is stirred with the revolving speed of 50r/min and obtains prefabricated slurry；Prefabricated slurry obtained above is injected into stainless steel mold
In tool, baking oven is put into after injection, the dry solidification 10h at 105 DEG C is demoulded after solidification up to cement base sound absorption material
Material.
It weighs expanded perlite and is put into pulverizer to crush 25min and cross 50 meshes and obtain expanded perlite crushed material, then will
Corn stover is put into Material disintegrator and sieves with 100 mesh sieve after crushing 1.5h, obtains corn stalk powder and minces, by expanded perlite crushed material
It minces with corn stalk powder and deionized water is to be standing and soaking 2 days after 2:1:10 is mixed in mass ratio, obtain soak；It will be upper
Soak filtering is stated, separation removal filtrate obtains filter residue, obtained filter residue is put into ceramic pot, then filter is added into ceramic pot
The concentration of slag amount 10% is 108The Trichoderma atroviride bacterium bacteria suspension of cfu/mL, obtains pre-composition after mixing evenly；It is equipped with above-mentioned
It is 27 DEG C that the ceramic pot of pre-composition, which is put into temperature, in the mould solution reaction chamber that relative air humidity is 55%, the mouldy reaction of heat and moisture preserving
It is 11 days, mouldy to take out mouldy product, as modified expanded perlite after reaction；According to parts by weight, 55 parts are weighed commonly
Batch mixer is put into after portland cement, 17 parts of above-mentioned modified expanded perlites, 1 part of rosin soap, 1 part of lignin and 52 parts of water mixing
In, 17min is stirred with the revolving speed of 55r/min and obtains prefabricated slurry；Prefabricated slurry obtained above is injected into stainless steel mold
In tool, baking oven is put into after injection, the dry solidification 11h at 107 DEG C is demoulded after solidification up to cement base sound absorption material
Material.
It weighs expanded perlite and is put into pulverizer to crush 30min and cross 50 meshes and obtain expanded perlite crushed material, then will
Corn stover is put into crush 2h in Material disintegrator after sieve with 100 mesh sieve, obtain corn stalk powder and mince, by expanded perlite crushed material and
Corn stalk powder minces and deionized water is to be standing and soaking 3 days after 2:1:10 is mixed in mass ratio, obtains soak；It will be above-mentioned
Soak filtering, separation removal filtrate obtain filter residue, obtained filter residue are put into ceramic pot, then filter residue is added into ceramic pot
The concentration of quality 10% is 108The Trichoderma atroviride bacterium bacteria suspension of cfu/mL, obtains pre-composition after mixing evenly；By above-mentioned equipped with pre-
It is 30 DEG C that the ceramic pot of mixed object, which is put into temperature, in the mould solution reaction chamber that relative air humidity is 60%, the mouldy reaction 12 of heat and moisture preserving
It, it is mouldy to take out mouldy product, as modified expanded perlite after reaction；According to parts by weight, 60 parts of ordinary silicons are weighed
Batch mixer is put into after acid salt cement, 20 parts of above-mentioned modified expanded perlites, 2 parts of rosin soaps, 2 parts of lignin and 55 parts of water mixing
In, 20min is stirred with the revolving speed of 60r/min and obtains prefabricated slurry；Prefabricated slurry obtained above is injected into stainless steel mold
In tool, baking oven is put into after injection, the dry solidification 12h at 110 DEG C is demoulded after solidification up to cement base sound absorption material
Material.
The Cementitious materials of absorbing noise that comparative example is produced with Shanghai company is as a comparison case to cement base produced by the present invention
Cementitious materials of absorbing noise in sound-absorbing material and comparative example carries out performance detection, and testing result is as shown in table 1:
Test method:
Acoustic absorptivity test is detected according to GBT23451-2009.
Oise insulation factor test is detected by GB/T19889.3-2005.
Porosity test is detected by GB/T2997-2000.
1 absorbing property measurement result of table
| Test item | Example 1 | Example 2 | Example 3 | Comparative example |
| Acoustic absorptivity | 0.86 | 0.88 | 0.89 | 0.58 |
| Oise insulation factor (dB) | 20.3 | 20.5 | 20.6 | 10.3 |
| Porosity (%) | 89.2 | 89.8 | 90.6 | 67.5 |
According to above-mentioned detection data, Cementitious materials of absorbing noise acoustic absorptivity of the invention is high, and oise insulation factor is high, and porosity is high, inhales
Sound effective value is good, has broad application prospects.
Claims (6)
1. a kind of preparation method of Cementitious materials of absorbing noise, it is characterised in that specific preparation step are as follows:
(1) it weighs expanded perlite and is put into pulverizer and crush 20~30min and cross 50 meshes and obtain expanded perlite crushed material, then
Corn stover is put into after crushing 1~2h in Material disintegrator and is sieved with 100 mesh sieve, obtained corn stalk powder and mince, by swelling perlite powder
Mince with corn stalk powder mince and deionized water mixing after be standing and soaking 2~3 days, obtain soak；
(2) above-mentioned soak is filtered, separation removal filtrate obtains filter residue, obtained filter residue is put into ceramic pot, then to pottery
Trichoderma atroviride bacterium bacteria suspension is added in porcelain jar, obtains pre-composition after mixing evenly；
(3) the above-mentioned ceramic pot equipped with pre-composition is put into mould solution reaction chamber, the mouldy reaction of heat and moisture preserving 10~12 days is mouldy
Mouldy product, as modified expanded perlite are taken out after reaction；
(4) according to parts by weight, weigh 50~60 parts of ordinary portland cements, 15~20 parts of above-mentioned modified expanded perlites, 1~
It is put into batch mixer after 2 parts of rosin soaps, 1~2 part of lignin and 50~55 parts of water mixing, is stirred to obtain prefabricated slurry；
(5) by prefabricated slurry injection stainless steel mould obtained above, baking oven, dry solidification, solidification are put into after injection
After demould up to Cementitious materials of absorbing noise.
2. a kind of preparation method of Cementitious materials of absorbing noise according to claim 1, it is characterised in that: institute in step (1)
The expanded perlite crushed material and corn stalk powder stated mince and the mass ratio of deionized water is 2:1:10.
3. a kind of preparation method of Cementitious materials of absorbing noise according to claim 1, it is characterised in that: institute in step (2)
The concentration stated is 108The additional amount of the Trichoderma atroviride bacterium bacteria suspension of cfu/mL is the 10% of filter residue quality.
4. a kind of preparation method of Cementitious materials of absorbing noise according to claim 1, it is characterised in that: institute in step (3)
The temperature for the mould solution reaction chamber stated is 25~30 DEG C, and relative air humidity is 50~60%.
5. a kind of preparation method of Cementitious materials of absorbing noise according to claim 1, it is characterised in that: institute in step (4)
The revolving speed being stirred stated is 50~60r/min, and the time being stirred is 15~20min.
6. a kind of preparation method of Cementitious materials of absorbing noise according to claim 1, it is characterised in that: institute in step (5)
The temperature for the dry solidification stated is 105~110 DEG C, and the time of dry solidification is 10~12h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811143598.4A CN109231913A (en) | 2018-09-29 | 2018-09-29 | A kind of preparation method of Cementitious materials of absorbing noise |
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| CN201811143598.4A CN109231913A (en) | 2018-09-29 | 2018-09-29 | A kind of preparation method of Cementitious materials of absorbing noise |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112174692A (en) * | 2020-09-11 | 2021-01-05 | 东南大学 | Sound-absorbing concrete material and preparation method thereof |
| CN112745059A (en) * | 2020-12-28 | 2021-05-04 | 广州声博士声学技术有限公司 | Perlite loaded graphene-based sound absorption mortar and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112174692A (en) * | 2020-09-11 | 2021-01-05 | 东南大学 | Sound-absorbing concrete material and preparation method thereof |
| CN112745059A (en) * | 2020-12-28 | 2021-05-04 | 广州声博士声学技术有限公司 | Perlite loaded graphene-based sound absorption mortar and preparation method thereof |
| CN112745059B (en) * | 2020-12-28 | 2022-07-15 | 广州声博士声学技术有限公司 | Perlite loaded graphene-based sound absorption mortar and preparation method thereof |
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Application publication date: 20190118 |