CN1664240A - Cement-based composite sound absorption material, method for manufacturing the same and sound barrier acoustic board - Google Patents
Cement-based composite sound absorption material, method for manufacturing the same and sound barrier acoustic board Download PDFInfo
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- CN1664240A CN1664240A CN 200510063377 CN200510063377A CN1664240A CN 1664240 A CN1664240 A CN 1664240A CN 200510063377 CN200510063377 CN 200510063377 CN 200510063377 A CN200510063377 A CN 200510063377A CN 1664240 A CN1664240 A CN 1664240A
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- 238000010521 absorption reaction Methods 0.000 title claims description 45
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- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 9
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- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 6
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 claims description 6
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention disclose concrete base compounding sound absorbing material, the manufacturing method and a sound barrier noise absorbing board. It is made up of fiber porous wave absorbing material, surface denaturalization agent, concrete and water by the method of mixing delamination distributing and compressing. The fiber porous wave absorbing material could be peduncle, stalk, or stick shaped material, the size of section is 0.5-6mm*0.5-6mm, the length is 30mm-150mm. The invention could be manufactured by the steps of: material whisking, delaminating and distributing material, covering and compressing, maintaining, cutting. It is easy to be operated and low cost and can be used for traffic road to absorb noise.
Description
Technical field
The present invention relates to a kind of cement-based composite sound absorption material, its manufacture method and sound-absorbing barrier, belong to the functional form building material field that traffic network sound absorption reduction is used.
Background technology
For preventing noise pollution, seek to control countermeasure from noise source, noise transmission approach and recipient three aspects usually.For large-scale traffic network, sound barrier be set then be the best measure of noise pollution of effectively controling environment.When running into barrier in the sound wave communication process, a part is reflected, and a part is absorbed, and some is by transmission and diffraction.The acoustic reflection coefficient of sound insulation type sound barrier is big, and sound transmission coefficient is very little, and is better to the noise reduction in the road outside, and the inboard noise of road is still very big.The absorbing sound type sound barrier absorbs sound wave and energy dissipation by the efficient sound absorption construction on its surface, " eating up " partial noise, the acoustic environment of the inside and outside both sides of road improvement simultaneously.Therefore, from technical development and instructions for use, sound barrier development main flow is the absorbing sound type sound barrier.Cement-based composite sound absorption material of the present invention is then mainly as the absorbing sound type sound barrier.
At present the wooden sound absorption material of cement based all adopt wood chips and cement mixing and stirring, solidify, the method for the demoulding.For example, application number is that 98100460 Chinese patent discloses a kind of method of making the timber cement board, and it is that the sheet timber after soaking into is placed container, under agitation adds cement and hardener, goes into mold forming then.The timber cement board surface irregularity of making in this way, sheet material is apparent relatively poor, and sound absorption coefficient only is about 0.5, can improve surface appearance by increasing cement consumption, but this increases timber cement board proportion, and sound absorbing capabilities descends.Application number is the manufacture method that 00120631.1 Chinese patent discloses a kind of sound-absorbing wood-foam cement plate, be with behind cement blowing agent and the cement mixing, put into mould pressurization, foaming, solidify, at room temperature solidify the demoulding after 12～48 hours, at room temperature continue to solidify one to two all sound-absorbing wood-foam cement plates that gets then.The sound-absorbing wood-foam cement plate sound absorption coefficient of making in this way because wood chip needs pre-soaking, causes complex manufacturing about 0.62～0.72, the cycle is longer.When above-mentioned two kinds of sound absorption materials use as absorbent lined barrier,, be easy to fracture because of its rupture strength is low, must with the compound use of high-strength backboard, cost is higher, its programming is slow, it is consuming time to take a lot of work.
Summary of the invention
In order to solve the defective that exists in the above-mentioned technology, the purpose of this invention is to provide a kind of simplify production technology, easy to operate, noise reduction coefficient is high and the cement-based composite sound absorption material of surfacing and manufacture method thereof, and a kind of sound-absorbing barrier that can directly utilize also is provided simultaneously.
To achieve these goals, the present invention has adopted following technical scheme: a kind of cement-based composite sound absorption material, its characteristics are: the layer-by-layer distribution compacting formed after it was mixed by cellulosic porous absorbing material, surface modifier, cement and water, and described surface modifier is silicate and sulfate; Wherein, cement factor is 150～350kg/m
3, cellulosic porous absorbing material content is 160～300kg/m
3, silicate content is 7～20kg/m
3, sulphate content is 10～20kg/m
3The material of described cellulosic porous absorbing material is wooden stalk, straw or artificial synthetic club-shaped material, and it is shaped as flat column or cylindric or other is irregularly shaped, and wherein, the sectional dimension of columnar material is 0.5～6mm * 0.5～6mm; The diameter of phi of cylindric material is 0.5mm～6mm, and its length is 30mm～150mm.
In the above-mentioned composite sound-absorbing material, comprise also in the mixed material that content is 10～29kg/m
3Polymer emulsion, as epoxy emulsion, acrylic emulsion or vinyl acetate-ethylene copolymer emulsion, and the solid content of polymer emulsion is 50%.
In the above-mentioned composite sound-absorbing material, can also add one deck reinforcement material at least when layer-by-layer distribution, as Web materials or board-like material, described Web materials is galvanized steel wire netting or fleece, and described board-like material is bamboo reinforcement or batten.
Second purpose of the present invention provides a kind of manufacture method of above-mentioned cement-based composite sound absorption material, and its characteristics are: it includes following steps,
1) raw material stirs: cellulosic porous absorbing material is mixed stirring with aqueous silicate solution, then, add sulfate solution and continue to stir, add cement again and be stirred into compound;
2) layer-by-layer distribution: the compound of step 1) is placed mould and layer-by-layer distribution, and every layer thickness is 50mm～100mm;
3) matched moulds pressurization and tight lock: pressure is 0.30MPa～2.0MPa;
4) maintenance moulding: with the material band mould stream curing of step 3) compacting, its vapor (steam) temperature is 40 ℃～90 ℃, and the stream curing time is 4h～10h, and the demoulding is a base substrate after the release; Base substrate sealing is put under the natural conditions maintenance after 7～28 days, again through being cut into described cement-based composite sound absorption material.
Step 1) can also add 10～29kg/m
3Polymer emulsion, the solid content of polymer emulsion is 50%.
In the said method, step 1) can be by adjusting the compound that material content obtains different densities, step 2) described layer-by-layer distribution is meant the compound of different densities is laid respectively successively, high density is mixed material and is placed bottom, the low-density compound places surface layer, and adds Web materials or board-like material in bottom or surface layer.
Step 2) layer-by-layer distribution described in is 4～8 layers.
Obtaining the compound of single density, step 2 with the method for step 1)) described layer-by-layer distribution is meant the mix layered laying with single density, and adds Web materials or board-like material in bottom or surface layer.
The 3rd purpose of the present invention provides two kinds of sound-absorbing barriers, and its characteristics are: it is made with said method by above-mentioned sound absorption material.
Adopt technical scheme of the present invention, its beneficial effect is as follows: owing to utilize sulfate and silicate that cellulosic porous absorbing material is carried out surfacing, promoted the setting and harden of cement, improved the fire line and the anti-corrosive properties of composite sound-absorbing material; By mixing polymer emulsion, improved the interface binding intensity and the flexural strength of cement-based composite sound absorption material.Adopt the rod-like fibre matter porous absorbing material and the cement mixing of special requirement size of the present invention, can make composite sound-absorbing material have excellent sound absorption pore structure and porosity.By in surface layer and bottom, adding reinforcement material, significantly improved the flexural strength and the impact strength of cement-based composite sound absorption material.Technical scheme of the present invention has that technology is simple, easy to operate, with low cost, noise reduction coefficient is high and presentation quality good, can directly make characteristics such as absorbing sound type sound barrier.The absorbing sound type sound barrier is applicable to the sound absorption reduction engineering of traffic network.
The specific embodiment
Cement-based composite sound absorption material of the present invention is formed by cellulosic porous absorbing material, surface modifier, cement and the compacting of water mixing layer-by-layer distribution, and surface modifier adopts sulfate and silicate; Concrete, with preparation 1m
3Cement-based composite sound absorption material be example, can be after aqueous silicate solution 70～200kg of 10% mixes earlier with 160～300kg cellulosic porous absorbing material with concentration, add concentration and be sulfate solution 80～160kg continuation stirring of 12.5%; And then the cement mixing and stirring that adds 150～350kg is even; For improving the interface binding intensity of composite sound-absorbing material, can be in cement add 10～29kg polymer emulsion (as epoxy emulsion, acrylic emulsion, vinyl acetate-ethylene copolymer emulsion) earlier, mix with cellulosic porous absorbing material again after both waters mix through modification.
Among the present invention, the material of cellulosic porous absorbing material can be wood stalk, straw or artificial synthetic club-shaped material, its shape can be for regular or irregular, and optimal club-shaped material sectional dimension is 0.5～6mm * 0.5～6mm, and length is 30mm～150mm.When club-shaped material was flat column, the sectional dimension of flat column material was 0.5～6mm * 0.5～6mm, and when cylindric, the diameter of phi of cylindric material is 0.5mm～6mm.
The manufacture method of cement-based composite sound absorption material of the present invention has dual mode:
One adopts the mode of adjusting each component ratio to obtain the compound of different densities, and cellulosic porous absorbing material consumption is constant, and the mixture density that then forms that cement consumption is few is low, otherwise, the mixture density height of formation; Compound with different densities places mould again, divide 4 to 8 layers of cloth, high density is mixed material and is placed bottom, the low-density compound places surface layer, simultaneously, establishes one deck Web materials or board-like material at least in bottom or surface layer, also can in bottom and surface layer, add one deck Web materials or board-like material respectively, this Web materials is galvanized steel wire netting or fleece, and board-like material is bamboo reinforcement or batten, to improve the rupture strength of above-mentioned sound absorption material.Matched moulds pressurization then, pressure is 0.30MPa～2.0MPa; Band mould stream curing in 40 ℃～90 ℃ temperature, the stream curing time is 4h～10h, the demoulding is a base substrate after the release; Base substrate sealing is put under the natural conditions maintenance after 7～28 days, again through being cut into described cement-based composite sound absorption material.
Its two, adopt the compound of single density to place mould, layer-by-layer distribution, every layer thickness are 50mm～100mm; Simultaneously, establish one deck Web materials or board-like material at least in bottom or surface layer, also can add one deck Web materials or board-like material respectively in bottom and surface layer, this Web materials is galvanized steel wire netting or fleece, board-like material is bamboo reinforcement or batten, to improve the rupture strength of above-mentioned sound absorption material.
The present invention with reference to GBJ88 test cement-based composite sound absorption material sound absorption coefficient, and is converted into noise reduction coefficient with reference to the density and the rupture strength of JC411 test cement-based composite sound absorption material.
The invention is further illustrated by the following examples, but the present invention is not limited only to described embodiment.
Embodiment 1
Earlier with 2.05 kilograms of concentration be 10.1% sodium silicate aqueous solution with 4.41 kilograms of wood that are of a size of 1.8mm * 2.0mm * 48mm obstruct mix stirring after; adding 2.06 kilograms of concentration and be 12.5% aluminum sulfate aqueous solution continues to stir; be that 42.5 R type portland cement mixes for 3.44 kilograms with strength grade again; layer-by-layer distribution in mould then; underlayer thickness is 60mm; more than every layer thickness be 70mm, and to add steel wire diameter when the shop fixtures layer therein be that 1.1mm, mesh size are the galvanized steel wire netting of 25mm * 25mm.After the matched moulds pressurization,, become the base substrate of 420mm * 420mm * 100mm after the demoulding 60 ℃ of band mould stream curings 12 hours down, again sealed maintenance after 28 days surfacing, have the cement-based composite sound absorption material of porous connectivity structure.
After tested, the over dry density of this example cement-based composite sound absorption material is 484kg/m
3, rupture strength reaches 4.4MPa, and noise reduction coefficient is 0.77.
Embodiment 2
With 1.81 kilograms of concentration is that 11.5% sodium silicate aqueous solution and 1.61 kilograms of concentration are that to divide first post processing specification be 4.41 kilograms of wood stalks of 1.8mm * 2.0mm * 76mm for 16.0% aluminum sulfate aqueous solution.With strength grade be 3.44 kilograms of 42.5 R type portland cements and solid content is that 50% 0.35 kilogram of vinyl acetate-ethylene copolymer emulsion and 0.82 kg water mix; the wood stalk that adds then after handling mixes; layer-by-layer distribution in mould; every layer thickness is about 70mm; after the matched moulds pressurization; be with mould stream curing 12 hours down at 60 ℃; become the base substrate of 420mm * 420mm * 100mm after the demoulding, again sealed maintenance after 28 days surfacing, have the cement-based composite sound absorption material of porous connectivity structure.
After tested, the over dry density of this example cement-based composite sound absorption material is 508kg/m
3, rupture strength reaches 4.2MPa, and noise reduction coefficient is 0.81.
Embodiment 3
With 15.22 kilograms of concentration is that 11.0% sodium silicate aqueous solution and 15.57 kilograms of concentration are that to divide first post processing specification be 36.08 kilograms of wood stalks of 2.2mm * 2.0mm * 76mm for 13.5% aluminum sulfate aqueous solution.With strength grade be 28.08 kilograms of 42.5 R type portland cements and solid content is that 50% 2.78 kilograms of vinyl acetate-ethylene copolymer emulsions and 6.42 kg water mix; the wood stalk that adds then after handling mixes; layer-by-layer distribution in mould; every layer thickness is about 60mm; after the matched moulds pressurization; be with mould stream curing 6 hours down at 60 ℃; become the base substrate of 2400mm * 1200mm * 60mm after the demoulding, again sealed maintenance after 28 days surfacing, have the cement-based composite sound absorption material of porous connectivity structure.
After tested, the over dry density of this example cement-based composite sound absorption material is 408kg/m
3, rupture strength reaches 1.8MPa, and noise reduction coefficient is 0.75.
Embodiment 4
With 2.51 kilograms of concentration is that 8.2% sodium silicate aqueous solution and 2.06 kilograms of concentration are that to divide first post processing specification be 4.41 kilograms of wood stalks of 2.2mm * 2.0mm * 76mm for 12.5% aluminum sulfate aqueous solution, be that 42.5 R type portland cement mixes for 3.44 kilograms with strength grade again, layer-by-layer distribution in mould then, bottom and surface thickness are 60mm, middle every layer thickness is about 70mm, and in bottom and surface layer the bamboo reinforcement that is of a size of 24mm * 9.5mm * 420mm is set.After the matched moulds pressurization,, become the base substrate of 420mm * 420mm * 110mm after the demoulding 60 ℃ of band mould stream curings 6 hours down, again sealed maintenance after 28 days surfacing, have the cement-based composite sound absorption material of porous connectivity structure.
After tested, the over dry density of this example cement-based composite sound absorption material is 433kg/m
3, rupture strength reaches 3.1MPa, and noise reduction coefficient is 0.83.
Embodiment 5
Cement-based composite sound absorption material divides five layers of cloth: first floor with 0.43 kilogram of concentration be 9.6% sodium silicate aqueous solution and 0.42 kilogram of concentration be 12.5% aluminum sulfate aqueous solution to divide first post processing specification be 0.88 kilogram of wood stalk of 1.8mm * 2.0mm * 76mm, be that 42.5 R type portland cement mixes for 1.15 kilograms with strength grade again; The second layer with 0.45 kilogram of concentration be 9.2% sodium silicate aqueous solution and 0.42 kilogram of concentration be 12.5% aluminum sulfate aqueous solution to divide first post processing specification be 0.88 kilogram of wood stalk of 1.8mm * 2.0mm * 76mm, be that 42.5 R type portland cement mixes for 0.99 kilogram with strength grade again; 0.35 kilogram of concentration of the 3rd layer of usefulness be 11.8% sodium silicate aqueous solution and 0.42 kilogram of concentration be 12.5% aluminum sulfate aqueous solution to divide first post processing specification be 0.88 kilogram of wood stalk of 1.8mm * 2.0mm * 76mm, be that 42.5 R type portland cement mixes for 0.84 kilogram with strength grade again; 0.33 kilogram of concentration of the 4th layer of usefulness be 12.5% sodium silicate aqueous solution and 0.42 kilogram of concentration be 12.5% aluminum sulfate aqueous solution to divide first post processing specification be 0.88 kilogram of wood stalk of 1.8mm * 2.0mm * 76mm, be that 42.5 R type portland cement mixes for 0.69 kilogram with strength grade again; Layer 5 with 0.33 kilogram of concentration be 12.5% sodium silicate aqueous solution and 0.42 kilogram of concentration be 12.5% aluminum sulfate aqueous solution to divide first post processing specification be 0.88 kilogram of wood stalk of 1.8mm * 2.0mm * 76mm, be that 42.5 R type portland cement mixes for 0.57 kilogram with strength grade again; Then in mould from first floor to the layer 5 layer-by-layer distribution, first floor is a bottom, it is that 1.1mm, mesh size are the galvanized steel wire netting of 25mm * 25mm that steel wire diameter is set in first floor.After the matched moulds pressurization,, become the base substrate of 420mm * 420mm * 110mm after the demoulding 60 ℃ of band mould stream curings 12 hours down, again sealed maintenance after 28 days surfacing, have the cement-based composite sound absorption material of porous connectivity structure.
After tested, this example cement-based composite sound absorption material, over dry density is 486kg/m
3, rupture strength reaches 4.8MPa, and noise reduction coefficient is 0.88.
The cement-based composite sound absorption material of the foregoing description directly is used as sound-absorbing barrier in the present invention, when in traffic network, using, and needn't be compound with high-strength backboard again.
Claims (10)
1. cement-based composite sound absorption material, it is characterized in that: it mixes back layer-by-layer distribution compacting by cellulosic porous absorbing material, surface modifier, cement and water and forms, described surface modifier is silicate and sulfate, described cellulosic porous absorbing material is wooden stalk, straw or artificial synthetic club-shaped material, its sectional dimension is at 0.5mm～6mm * 0.5mm～6mm, and length is at 30mm～150mm; Wherein, in each volume composite sound-absorbing material, cement factor is 150～350 weight portions, and cellulosic porous absorbing material content is 160～300 weight portions, and silicate content is 7～20 weight portions, and sulphate content is 10～20 weight portions.
2. composite sound-absorbing material according to claim 1, it is characterized in that: the material that is used for layer-by-layer distribution comprises that also the polymer emulsion of 10～29 weight portions, described polymer emulsion are epoxy emulsion, acrylic emulsion or vinyl acetate-ethylene copolymer emulsion.
3. composite sound-absorbing material according to claim 1 and 2 is characterized in that: add one deck reinforcement material at least during described layer-by-layer distribution, described reinforcement material is galvanized steel wire netting or fibroreticulate Web materials, or is the board-like material of bamboo reinforcement or batten.
4. the manufacture method of the described cement-based composite sound absorption material of claim 1, it is characterized in that: it includes following steps,
1) raw material stirs: cellulosic porous absorbing material is mixed stirring with aqueous silicate solution, then, add sulfate solution and continue to stir, add cement again and be stirred into compound;
2) layer-by-layer distribution: the compound of step 1) is placed mould and layer-by-layer distribution, and every layer thickness is 50mm～100mm;
3) matched moulds pressurization and tight lock: pressure is 0.30MPa～2.0MPa;
4) maintenance moulding: with the material band mould stream curing of step 3) compacting, its vapor (steam) temperature is 40 ℃～90 ℃, and the stream curing time is 4h～10h, and the demoulding is a base substrate after the release; Base substrate sealing is put under the natural conditions maintenance after 7～28 days, again through being cut into described cement-based composite sound absorption material.
5. method according to claim 4 is characterized in that: also add the polymer emulsion of 10～29 weight portions in the step 1), described polymer emulsion is epoxy emulsion, acrylic emulsion or vinyl acetate-ethylene copolymer emulsion.
6. according to claim 4 or 5 described methods, it is characterized in that: with the method for step 1) by adjusting the compound that each constituent content obtains different densities, step 2) described layer-by-layer distribution is meant the compound of different densities is laid respectively successively, high density is mixed material and is placed bottom, the low-density compound places surface layer, and adds Web materials or board-like material in bottom or surface layer.
7, according to claim 4 or 5 described methods, it is characterized in that: the compound that obtains single density with the method for step 1), step 2) described layer-by-layer distribution is meant the mix layered laying with single density, and adds Web materials or board-like material in bottom or surface layer.
8. method according to claim 6 is characterized in that: step 2) described in layer-by-layer distribution be 4～8 layers.
9. sound-absorbing barrier, it is characterized in that: it is made with the method for claim 6 by the described sound absorption material of claim 3.
10. sound-absorbing barrier, it is characterized in that: it is made with the method for claim 7 by the described sound absorption material of claim 3.
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| CN101818484A (en) * | 2010-05-21 | 2010-09-01 | 淄博北辰金属材料科技发展有限公司 | Special silicon-magnesium-polymer cement acoustic panel of road sound barrier and preparation method thereof |
| CN101293752B (en) * | 2008-06-03 | 2012-11-28 | 傅梅 | Acoustic absorption, noise insulation, thermal insulation, condensation resistant building material, preparation method and application thereof |
| CN102852098A (en) * | 2011-06-30 | 2013-01-02 | 郭云驰 | Cement-based sawdust composite noise barrier |
| CN103422450A (en) * | 2013-07-11 | 2013-12-04 | 西南交通大学 | Combined load shedding type sound barrier for high speed railway |
| CN104591642A (en) * | 2014-12-23 | 2015-05-06 | 沈阳理工大学 | Preparation method of heat insulation anti-noise foamed cement products |
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