CN1169739C - Sound-absorbing material for subway and its preparing process - Google Patents
Sound-absorbing material for subway and its preparing process Download PDFInfo
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- CN1169739C CN1169739C CNB011297093A CN01129709A CN1169739C CN 1169739 C CN1169739 C CN 1169739C CN B011297093 A CNB011297093 A CN B011297093A CN 01129709 A CN01129709 A CN 01129709A CN 1169739 C CN1169739 C CN 1169739C
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- subway
- sound
- absorbing material
- haydite
- cement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The present invention discloses a subway sound absorbing material prepared from 40 to 70% of haydite, 20 to 48% of cement, 0 to 10% of pulverized coal ash and 1 to 2% of foaming agents. The present invention also discloses a method for preparing the subway sound absorbing material, which comprises the following steps: (1) the haydite, the cement and the pulverized coal ash of the base material are mixed; (2) the foaming agents are diluted by water and are added into the mixture of the haydite, the cement and the pulverized coal ash for mixing; (3) the material is formed. The subway sound absorbing material has the advantages of wide sound absorbing transmission band, high sound absorption coefficient, low bulk weight, high intensity, fire prevention, water prevention, flame resistance, asepsis, etc. The subway sound absorbing material is fabulously suitable for the noise treatment of subways and is also suitable for the sound insulation of industrial factory buildings and highways, and the application prospect is broad; moreover, the subway sound absorbing material prepared from the haydite which has the advantages of wide source and low price lowers production cost greatly and enhances economic benefit. The method for preparing the subway sound absorbing material has the advantages of simple technological process, convenient construction and small difficulty.
Description
(1) technical field
The present invention relates to a kind of sound absorbent material, particularly a kind of sound-absorbing material for subway that should be in subway tunnel and preparation method thereof.
(2) background technology
Sound-absorbing material for subway mainly is the material that absorbs elimination with the noise that subway is produced of building that is applied to subway tunnel, according to the environment for use requirement, sound-absorbing material for subway must possess following condition: 1. waterproof, fire-retardant has the work-ing life that is not less than 20 years at least; 2. do not contain asbestos, mineral fibre, polystyrene and have corrosive material; 3. for reaching the fire safety requirement, the diffusing fire value of sound absorbent material, the value of smoldering and inflammable value should be zero; 4. have higher medium-high frequency sound absorbing coefficient and certain intensity.The sound-absorbing material for subway of using at home mainly adopts the material of external import at present, as a kind of sound absorbent material that manufactures by raw materials such as Barra board tackiness agent, CSI-20 whipping agent, CSI-40 aglites, though in use sound-absorbing effect is better, but because its aggregate raw materials cost that accounts for major ingredient is higher, so there is the higher shortcoming of cost in this sound absorbent material, and constructing operation is also cumbersome.
(3) summary of the invention
The objective of the invention is to overcome the shortcoming of existing sound absorbent material, the preparation method of a kind of sound absorbing coefficient height, lower-cost sound-absorbing material for subway is provided.
Another object of the present invention is to provide a kind of sound-absorbing material for subway that makes by aforesaid method.
Purpose of the present invention is achieved through the following technical solutions: the preparation method of this subway sound absorbent material may further comprise the steps: (1) mixes the haydite in the base-material, cement and flyash; (2) dilute with water whipping agent also mixes in the mixture of adding haydite, cement and flyash; (3) moulding; Wherein the content of each composition of base-material is as follows: haydite 40～70%; Cement 20～48%; Flyash 0～10%; Whipping agent 1～2%, all percentage ratios are weight percentage.
Described sound-absorbing material for subway base-material also can add pearlstone 0～5%; Water-resisting agent 1～2%.
Described cement is one or more in alunite expansive cement or polymer cement or the light cement.
The preparation method of this subway sound absorbent material also can may further comprise the steps: pearlstone is added water-resisting agent, mix obtaining the perlite slurry then, the perlite slurry is mixed with haydite, cement and flyash again.
Sound-absorbing material for subway of the present invention is promptly made by aforesaid method.
The base-material of sound-absorbing material for subway of the present invention mainly is made of haydite, cement and pearlstone.Haydite plays skeleton function; Cement mainly adopts alunite expansive cement, plays binding agent; Pearlstone plays a part to reduce unit weight, and certain sound-absorbing effect is also arranged.Because of pearlstone water-intake rate big (the volume water absorption rate is up to 25%), the prescription that adds pearlstone also need add water-resisting agent, and its purpose mainly is in order to reduce the water-intake rate of material, and is excessive as water regain, can detrimentally affect be arranged to the strength of materials, dilute with water water-resisting agent before adding water-resisting agent; In the present invention, alunite expansive cement can partly be replaced by flyash, polymer cement or light cement, and main purpose is the unit weight for lightening material.
Sound-absorbing material for subway of the present invention structurally belongs to the porous sound absorbing material, it mainly is the foaming effect of utilizing whipping agent, in slurry, introduce tiny in a large number, equally distributed bubble, and it is still remained after hardening of cement, and reasonably combined by between raw material granularity, make sound absorbent material have many small gaps and successive bubble, so not only have goodish air permeability, and obtain the good sound absorption performance; The sound-absorbing principle of this material is: sound wave causes the air movement of aperture or gap location, influences not movability because of the air near hole wall is subjected to hole wall, thus with have viscous force away from the air of hole wall; In addition, also there is frictional force between air and hole wall.Under the effect of these two reactive forces, quite a few acoustic energy is converted into heat energy, acoustic attenuation, and reflected sound weakens, thereby reaches the purpose of sound-absorbing; Because high frequency sound wave can make the vibration velocity of air particle accelerate, the heat exchange of air and hole wall is also accelerated, and this just makes this bill of material reveal excellent high frequency sound absorption qualities.
The present invention compares with existing sound absorbent material and has following advantage: (1) this subway sound absorbent material sound-absorbing bandwidth, and the sound absorbing coefficient height, unit weight is low, and intensity is big, and has fire prevention, waterproof, advantage such as fire-retardant, nontoxic, is highly suitable for the Noise abatement of subway; (2) this subway sound absorbent material mainly adopts wide material sources, cheap haydite as main raw material, greatly reduces production cost, has improved economic benefit; (3) because the haydite that material adopted was industrial waste originally, so the present invention can " be turned waste into wealth " preferably, save natural resources, environment protecting is better; (4) sound-absorbing material for subway preparation method of the present invention technical process is simple, and easy construction, difficulty are little; (5) this subway sound absorbent material also is applicable to the Noise abatement of industrial premises, the sound insulation processing of highway etc. except that the Noise abatement that can be used for subway, and application prospect is very extensive.
(4) description of drawings
Fig. 1 is a sound-absorbing material for subway preparation method's of the present invention process flow sheet.
Fig. 2 is another process flow sheet of sound-absorbing material for subway preparation method of the present invention.
(5) embodiment
Embodiment 1
Fig. 1 shows sound-absorbing material for subway preparation method's of the present invention technical process, and as seen from Figure 1, the technical process of present method comprises following operation steps: (1) mixes the haydite in the base-material, cement and flyash; (2) dilute with water whipping agent adds in the mixture of haydite, cement and flyash and mixes; (3) moulding; (4) maintenance.The composition of this subway sound absorbent material base-material is: haydite: 70%; Alunite expansive cement: 20%; Flyash: 10%; Whipping agent: 2%.Can make this subway sound absorbent material by above-mentioned technical process preparation, its The performance test results is as shown in table 1.
Table 1
| Wet unit weight (kg/m 3) | Ultimate compression strength (MPa) | Folding strength (MPa) | |||||||
| 3d | 28d | 3d | 28d | ||||||
| 638 | 0.59 | 1.78 | 0.55 | 1.90 | |||||
| Sound absorbing coefficient | |||||||||
| Frequency band (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 | |||
| Sound absorption coefficient | 0.06 | 0.34 | 0.74 | 0.97 | 0.93 | 0.74 | |||
Embodiment 2
Fig. 2 shows another technical process of sound-absorbing material for subway preparation method of the present invention, and as seen from Figure 2, the technical process of present method comprises following operation steps: (1) adds water-resisting agent with pearlstone, mixes then and obtains the perlite slurry; (2) the perlite slurry is mixed with haydite, cement and flyash; (3) dilute with water whipping agent adds in the mixture of above-mentioned steps and mixes; (4) moulding; (5) maintenance.The composition of this subway sound absorbent material base-material is: haydite: 47%; Alunite expansive cement: 28%; Polymer cement: 10%; Light cement: 10%; Pearlstone: 5%; Whipping agent: 1%; Water-resisting agent: 2%.Obtain this subway sound absorbent material by technical process preparation shown in Figure 2, its The performance test results is as shown in table 2.
| Wet unit weight (kg/m3) | Ultimate compression strength (MPa) | Folding strength (MPa) | ||||||||
| 3d | 28d | 3d | 28d | |||||||
| 993 | 1.52 | 2.80 | 1.1 | 3.12 | ||||||
| Sound absorbing coefficient | ||||||||||
| Frequency band (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 | ||||
| Sound absorption coefficient | 0.17 | 0.47 | 0.80 | 0.88 | 0.90 | 0.68 | ||||
As seen from the above-described embodiment, utilize the sound absorption coefficient and the ultimate compression strength result of the sound-absorbing material for subway that present method makes all more satisfactory, especially better at the sound-absorbing effect of medium-high frequency section, by the industrial standards (ASTMC423-84A) of the U.S., sound absorbing coefficient was 0.75 when frequency was 500Hz; Sound absorbing coefficient was 0.85 when frequency was 1000Hz; Sound absorbing coefficient was 0.90 when frequency was 2000Hz, and the visible two kinds of prescriptions of the present invention of the test result of comparison sheet 1 and table 2 have have all met or exceeded the industrial standards of the U.S..
The present invention selects for use haydite to do aggregate, be because its have that unit weight is little, antifreeze, shock resistance, antidetonation, nontoxic, do not fire, do not smolder, the advantage of good endurance, its chemical ingredients and physicals see Table 3 and table 4; Selecting alunite expansive cement for use is the volumetric shrinkage that occurs in the cement hydration process in order to compensate, and to improve the anti-crack and anti-seepage ability of material, its technical feature sees Table 5; Select for use pearlstone to be based on the purpose of the unit weight that will reduce sound absorbent material, itself has acoustical absorbance properties perlite, and nontoxic, do not burn, its chemical ingredients sees Table 6.
The chemical ingredients of table 3 haydite (%)
| SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | Loss on ignition | Add up to |
| 65.0 | 18.2 | 11.5 | 3.0 | 2.0 | 0.2 | 99.9 |
The technical feature of table 4 haydite
Performance index meet national GB/177431.1-1998 index request
| Specification (mm) | Tap density kg/m 3 | One hour water-intake rate (%) | Cylindrical compress strength (Mpa) | Thermal conductivity (w/m.k) |
| ≤1.5 | ≤500 | ≤12.0 | ≤1.5 | 0.21 |
| 1.5～2.5 | ≤450 | ≤10.0 | ≤1.2 | 0.21 |
Table 5 alunite expansive cement technical feature
Initial set is no earlier than 45 minutes, and final set was earlier than 8 hours 30 minutes.
| Cement mark | Ultimate compression strength 〉=Mpa | Folding strength 〉=Mpa | ||||
| 3d | 7d | 28 | 3d | 7d | 28d | |
| 525 | 24.5 | 34.3 | 52.5 | 4.1 | 5.3 | 7.8 |
The chemical ingredients of table 6 pearlstone (%)
| SiO 2 | Al 2O 3 | CaO | MgO | Na 2O | R 2O | H 2O | Loss on ignition | Summation |
| 7.0 | 14.7 | 3.4 | 1.5 | 0.2 | 2.0 | 2.2 | 3.1 | 97.1 |
Claims (4)
1, a kind of preparation method of sound-absorbing material for subway is characterized in that may further comprise the steps: (1) mixes haydite, cement and the flyash of the specification in the base-material for≤2.5mm; (2) dilute with water whipping agent, add specification and be≤mixture of haydite, cement and the flyash of 2.5mm in and mixing; (3) moulding; Wherein the content of each composition of base-material is as follows:
Specification is≤haydite 40～70% of 2.5mm;
Cement 20～48%;
Flyash 0～10%;
Whipping agent 1～2%;
All percentage ratios are weight percentage.
2, the preparation method of sound-absorbing material for subway according to claim 1 is characterized in that: described sound-absorbing material for subway base-material adds pearlstone 0～5%, water-resisting agent 1～2%.
3, the preparation method of sound-absorbing material for subway according to claim 2 is characterized in that: described pearlstone is added described water-resisting agent, mix obtaining the perlite slurry then, more described perlite slurry is mixed with haydite, cement and flyash.
4, a kind of sound-absorbing material for subway by each described method preparation of claim 1～3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011297093A CN1169739C (en) | 2001-09-29 | 2001-09-29 | Sound-absorbing material for subway and its preparing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011297093A CN1169739C (en) | 2001-09-29 | 2001-09-29 | Sound-absorbing material for subway and its preparing process |
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| CN1346814A CN1346814A (en) | 2002-05-01 |
| CN1169739C true CN1169739C (en) | 2004-10-06 |
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| CNB011297093A Expired - Fee Related CN1169739C (en) | 2001-09-29 | 2001-09-29 | Sound-absorbing material for subway and its preparing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589175C (en) * | 2007-04-10 | 2010-02-10 | 江苏东泽环保科技有限公司 | Granule sound absorption board and manufacture method thereof |
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| CN101172884B (en) * | 2006-11-02 | 2012-07-04 | 天臣实业有限公司 | Porcelain granule building material and process for manufacturing the same |
| CN102408249B (en) * | 2011-08-29 | 2013-04-03 | 四川西南交大铁路发展有限公司 | Silicate-based porous sound-absorbing material used in rail traffic and preparation method thereof |
| CN102603352A (en) * | 2012-03-14 | 2012-07-25 | 武汉理工大学 | Sound absorbing material quick in onsite construction and method for preparing sound absorbing material |
| CN102964760B (en) * | 2012-11-22 | 2015-06-03 | 芜湖跃飞新型吸音材料股份有限公司 | Calcined bauxite modified composite sound absorbing material and preparation method thereof |
| CN103831055B (en) * | 2013-11-22 | 2015-09-09 | 河北工业大学 | A kind of mixing procedure of pearl stone sound absorbing baffle raw material and equipment |
| CN105036797B (en) * | 2015-07-23 | 2017-04-26 | 江苏新光环保工程有限公司 | Multilayered-structure porous ceramic sound-absorbing material and preparing method thereof |
| CN105111798B (en) * | 2015-09-02 | 2018-02-16 | 上海市环境科学研究院 | Weather-proof broad band sound absorption coating |
| CN106351136B (en) * | 2016-10-21 | 2018-08-14 | 山西省交通科学研究院 | A kind of environment-friendly type road sound barrier based on total utilization of PCA |
| CN109133738A (en) * | 2018-08-23 | 2019-01-04 | 惠州富盈新材料科技有限公司 | A kind of lightweight regenerated resources abatvoix and preparation method thereof |
| CN114380620A (en) * | 2022-01-13 | 2022-04-22 | 武汉理工大学 | Porous long-life sound-absorbing wall material and preparation method thereof |
-
2001
- 2001-09-29 CN CNB011297093A patent/CN1169739C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589175C (en) * | 2007-04-10 | 2010-02-10 | 江苏东泽环保科技有限公司 | Granule sound absorption board and manufacture method thereof |
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| CN1346814A (en) | 2002-05-01 |
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Granted publication date: 20041006 Termination date: 20120929 |