CN106187050A - A kind of porous silica sand noise reducing plate and preparation method thereof - Google Patents

A kind of porous silica sand noise reducing plate and preparation method thereof Download PDF

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CN106187050A
CN106187050A CN201610543498.5A CN201610543498A CN106187050A CN 106187050 A CN106187050 A CN 106187050A CN 201610543498 A CN201610543498 A CN 201610543498A CN 106187050 A CN106187050 A CN 106187050A
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noise reducing
reducing plate
sand grains
porous silica
silica sand
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CN106187050B (en
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燕翔
王熙伟
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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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/71—Resistive to light or to UV
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/29—Frost-thaw resistance
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to general acoustic barrier material field, in particular to a kind of porous silica sand noise reducing plate.Described noise reducing plate is mainly made up of following raw material: sand grains 75～85 parts, sodium silicate 12～18 parts, magnesium silicate 2～4 parts, Lithium metasilicate 1～3 parts, activator 0.1～0.4 part；By mass percentage, described activator includes following component: copper powder 35%～60%, magnesium oxide 20%～40%, aluminium powder 15%～20%, glass dust 5%～15%.The porous silica sand noise reducing plate that the present invention provides solidifies after being mixed according to its special ratios by the silicate of the sand grains of different-grain diameter and specific proportioning and activator and forms, in sound wave incides plate under the condition of incidence of multi-angle and when in plate, between sand grains, transverse crossing is propagated, the sound wave of characteristic frequency can be formed and interfere sound energy consumption, referred to as phase type sound absorption；Additionally, this noise reducing plate also to have outstanding intensity, fire resistance and weather resistance the most fine.

Description

A kind of porous silica sand noise reducing plate and preparation method thereof
Technical field
The present invention relates to general acoustic barrier material field, in particular to a kind of porous silica sand noise reducing plate and preparation thereof Method.
Background technology
Along with modern industry and the development of transportation cause and the enhancing of environmental consciousness, acoustic environment is wanted by people Asking more and more higher, sqouynd absorption lowering noise is increasingly becoming a relevant high-tech, environment and the mankind and develops what urgent need solved in harmony Important topic.
Sound absorption conventional in the market and sound insulating material, generally fire prevention, weather-proof, intensity, absorb sound with the performance such as sound insulation not Good, cruelly spill various problem when application.Needs work out that one can be prevented fires, weather-proof, physical and chemical performance is excellent, Meet again the Novel noise reduction plate that sound absorption requires with sound insulation.
In view of this, the special proposition present invention.
Summary of the invention
The first object of the present invention is to provide a kind of porous silica sand noise reducing plate, described porous silica sand noise reducing plate intensity Height, has the weather resistance of excellence, and fire resistance is the most fine.
The second object of the present invention is to provide the preparation method of a kind of described porous silica sand noise reducing plate, and the method operates Simply, it is easy to implement.
In order to realize the above-mentioned purpose of the present invention, spy by the following technical solutions:
A kind of porous silica sand noise reducing plate, by weight, described noise reducing plate is mainly made up of following raw material:
Sand grains 75～85 parts, sodium silicate 12～18 parts, magnesium silicate 2～4 parts, Lithium metasilicate 1～3 parts, activator 0.1～0.4 Part；
By mass percentage, described activator includes following component:
Copper powder 35%～60%, magnesium oxide 20%～40%, aluminium powder 15%～20%, glass dust 5%～15%.
Sand grains is mainly composed of quartz or mineral grain, and its voidage is big, can be that sound-absorbing material provides architecture basics；
The effect of silicate mainly provides cohesive force to promote the molding of noise reducing plate, gives silica sand noise reducing plate with fire-retardant simultaneously Performance and enough intensity.The present invention provide silica sand noise reducing plate in sand grain content higher, in order to provide outstanding adhesive property and The porosity of sound-absorbing material is not caused excessive interference, it is therefore preferable that silicate is as shaping raw material.For strengthening its molding energy Power, it is also possible to add a part of Portland clinker etc. wherein as auxiliary binder.
Sodium silicate is a kind of water-soluble silicate, is a kind of inorganic binder, and its cohesive force is strong, intensity is higher, acid resistance, Heat-resist, it is the main component of silicate adhesive；
After magnesium silicate and other different materials are compound, there is excellent heat insulation, fire prevention, compressive property, be preferable building Energy-saving material；
Lithium metasilicate is lithium metal and a series of compound generated during silica reaction, can coordinate with sodium silicate, magnesium silicate Form firm adhesive.
Concrete, silicate is to work using the form of waterglass as inorganic adhesive.Compared with Organic adhesive, Silicate adhesive has advantages such as flame resistance is good, acid resistance strong, environment-protecting asepsis, preparation technology are simple, and the present invention provides Silicate proportioning good endurance, gluing performance is strong, and the silica sand noise reducing plate intensity made is high.
Waterglass can be modified by described activator, strengthens its performance, reduces solidification temperature.
Preferably, by mass percentage, described activator includes following component:
Copper powder 40%～50%, magnesium oxide 25%～35%, aluminium powder 16%～18%, glass dust 8%～12%.
Although silicate adhesive also exists various advantage, but its shortcoming also ratio is more prominent, i.e. adhesion strength is low.For it This shortcoming, it is modified making it have outstanding adhesion strength and water resistance by the present invention by the method for activator.
Silicate adhesive is during dehydrating and curing, and the free hydroxyl of silicate can with firming agent (in the present invention, Silicon oxide in sand grains) and the network structure of the activator fusion formation similar pottery with firming agent as core.
Wherein, copper powder can be oxidized to CuO in the curing process, and CuO can effectively strengthen the shear strength of adhesive, and CuO can also effectively reduce solidification temperature and hardening time；
Aluminium powder can be oxidized to Al equally2O3, also can generate the Al (OH) of a part3；The addition of aluminium powder and magnesium oxide is equal It is that the addition with copper powder adapts, can be used to increase weatherability and the shear strength of silicate adhesive；
Glass powder is inorganic stabilized hard granule, and using raw material in production is PbO, SiO2、TiO2Mix Deng electron level raw material After even, then high temperature carries out solid state reaction, forms the glass isotropic body of disordered structure, stable chemical nature, can be used for increasing silicic acid The weatherability of salt adhesive and corrosion resistance.
Preferably, porous silica sand noise reducing plate as above, described sodium silicate is 4 mould sodium silicate.
The molecular formula of sodium silicate is Na2O·nSiO2, the mixing ratio of quartz sand and alkali i.e. SiO2And Na2The mol ratio of O is certainly Determining the modulus n of sodium silicate, modulus i.e. shows the composition of sodium silicate, and modulus is the important parameter of sodium silicate, typically 1.5～ Between 3.5.Modulus is the biggest, and sodium silicate solid is more insoluble in water, and when n is 1, normal-temperature water can be dissolved, and n needs hot water ability when strengthening Dissolve, when n is more than 3, need the steam of more than 4 atmospheric pressure to dissolve.Sodium silicate modulus is the biggest, and silica content is the most, silicic acid Sodium viscosity increases, it is easy to decompose hardening, and cohesive force increases, and therefore the sodium silicate of different moduluses has different use.
One aspect of the present invention needs to reduce the addition of binding agent as far as possible, the strong of sound-absorbing material of on the one hand can not compromising again Degree, has therefore preferably employed 4 mould sodium silicate and has coordinated with magnesium silicate and the Lithium metasilicate of set proportioning, be effectively increased the strong of gluing Degree.
Preferably, porous silica sand noise reducing plate as above, the particle diameter of described sand grains is 40～300 mesh.
Mostly sound-absorbing material is some porous materials, in sound wave enters the hole of porous material, causes air between space to divide Son, fiber vibration, owing to air acts on the frictional resistance of hole, the viscosity resistance of air, conduction of heat etc., make major part acoustic energy Become thermal dissipation, play sound absorption.The general material that density is little, hole is many, acoustically effective is good；Close structure, smooth, hard Hard material, acoustically effective is poor.Due to above reason, the particle diameter of sand grains has important impact to the assimilation effect of noise.
Preferably, porous silica sand noise reducing plate as above, described noise reducing plate includes basic unit, intermediate layer and surface layer；
In described basic unit, described sand grains by the sand grains of 40～100 mesh and the sand grains of 100～120 mesh according to (4～6): 1 Part by weight mixture form.
The particle diameter of described sand grains is 250～300 mesh；
In described intermediate layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～300 mesh according to 1:(4～6) Part by weight mixture form；
In described surface layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～200 mesh according to 1:(6～8) Part by weight mixture forms.
General silica sand noise reducing plate is preferable for the absorption of high-frequency sound, but poor to the assimilation effect of low-frequency sound.Low frequency The sound absorption properties thickness along with material of sound increases and increases, thus generally uses the mode increasing thickness to strengthen low frequency noise Absorbability.The three-decker of different aperture is formed porous silica sand noise reducing plate by the present invention, when after sound wave incident to silica sand plate, Sound wave passes through between sand grains under the condition of incidence of multi-angle in plate, mutual when the sound wave of characteristic frequency passes through between sand grains Interfere sound energy consumption, referred to as phase type sound absorption.The sheet material that this kind of technique is made, because having higher surface density, has again Higher oise insulation factor.There is the dual characteristics of sound absorption and sound insulation, it is achieved sound absorption is in the noise reduction purpose of one.
In this application, it is different that the difference of basic unit, intermediate layer and surface layer is only the particle diameter of sand grains, its composition proportion and system Preparation Method is just as, and raw material composition is configured the most in a manner mentioned above.
Preferably, porous silica sand noise reducing plate as above, the thickness of described porous silica sand noise reducing plate is 18mm～22mm.
The sheet material that this kind of technique is made, density is usually 1500～1800kg/m3, generally the thickness of slab of preparation be 18mm～ 22mm, surface density is 30～36kg/mm2.Because porous silica sand noise reducing plate has higher surface density, so except having strong suction Outside the feature of sound, also there is higher body oise insulation factor.That is the sound barrier that porous silica sand noise reducing plate is prepared from has Sound absorption and the dual characteristics insulated against sound, it is achieved sound absorption is in the noise reduction purpose of one.
Preferably, porous silica sand noise reducing plate as above, the thickness of described basic unit, intermediate layer and surface layer than for (2～ 6): (10～15): 1.
The thick end of noise reducing plate different aspects and hole have conclusive impact to its sqouynd absorption lowering noise ability.
The preparation method of porous silica sand noise reducing plate as above, comprises the steps:
1), described sodium silicate, magnesium silicate, Lithium metasilicate are made waterglass；
2), by step 1) waterglass that obtains and described sand grains and described activator mixing and stirring, it is heated and cured into Type.
This preparation method is simple, is beneficial to operation.
Preferably, the preparation method of porous silica sand noise reducing plate as above, in step 1) in, the preparation of described waterglass Method is:
By described sodium silicate, magnesium silicate, Lithium metasilicate add 35～45 weight portions water in, press at 6～8 atmospheric pressure Steam reaction and make waterglass.
Owing to using high mould sodium silicate as the main component of adhesive in the present invention, and modulus is the biggest, and cohesive force increases, But its dissolubility the most constantly reduces simultaneously, thus use 6～8 atmospheric pressure to carry out pressure and steam reaction to promote the dissolving of silicate.
Preferably, the preparation method of porous silica sand noise reducing plate as above, in step 2) in, described in be heating and curing molding Condition be:
200 DEG C～250 DEG C solidification 40min～80min.
Due to the addition of activator, solidification temperature and the hardening time of the present invention are minimized, solidify at this temperature The noise reducing plate intensity arrived is high, resistant to shearing performance is good.
Compared with prior art, the invention have the benefit that
1), the porous silica sand noise reducing plate that the present invention provides is by the sand grains of different-grain diameter and the silicate of specific proportioning and activation Agent solidifies and forms after mixing according to its special ratios.Sand grains by silicate use special process bond together time, sand grains it Between define micro-pore substantial amounts of, irregular, that be interconnected natively.By this processing technology, sand grains particle diameter with become Type mode all can accurately regulate and control, and then determines size and the arrangement mode of internal void, thus produces various various flows Resistance and the noise reducing plate of sound absorption characteristics.
2), general silica sand noise reducing plate preferable for the absorption of high-frequency sound, but poor to the assimilation effect of low-frequency sound.Low Frequently the sound absorption properties thickness along with material of sound increases and increases, thus generally uses the mode increasing thickness to strengthen and make an uproar low frequency The absorbability of sound.The three-decker of different aperture is formed porous silica sand noise reducing plate by the present invention, when sound wave incident is to silica sand plate After, sound wave is formed with phase place targetedly when transverse crossing propagation between sand grains in plate under the condition of incidence of multi-angle and does Relate in muffler plate and pass through between sand grains, when the sound wave of characteristic frequency passes through between sand grains, interfere sound energy consumption, referred to as Phase type absorbs sound.The sheet material that this kind of technique is made, because having higher surface density, has again higher oise insulation factor.There is suction Sound and the dual characteristics of sound insulation, it is achieved sound absorption is in the noise reduction purpose of one.
3), the invention provides a kind of New Type Silicate activator, described activator coordinates with the silicate of specific proportioning, Binding effective, intensity is high, also has fire resistance and weather resistance, and does not impacts the acoustically effective of material itself.
Detailed description of the invention
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but those skilled in the art will Understanding, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.In embodiment unreceipted specifically Condition person, the condition advised according to normal condition or manufacturer is carried out.Agents useful for same or instrument unreceipted production firm person, be Can be by the commercially available conventional products bought and obtain.
Embodiment 1
A kind of porous silica sand noise reducing plate, by weight, described noise reducing plate is mainly made up of following raw material:
Sand grains 75 parts, sodium silicate 12 parts, magnesium silicate 4 parts, Lithium metasilicate 1 part, 0.1 part of activator；
By mass percentage, described activator includes following component:
Copper powder 35%, magnesium oxide 40%, aluminium powder 20%, glass dust 5%.
Its preparation method is for comprising the steps:
1), described sodium silicate, magnesium silicate, Lithium metasilicate are made waterglass；
2), by step 1) waterglass that obtains and described sand grains and described activator mixing and stirring, it is heated and cured into Type.
Embodiment 2
A kind of porous silica sand noise reducing plate, by weight, described noise reducing plate is mainly made up of following raw material:
Sand grains 85 parts, 4 mould sodium silicate 18 parts, magnesium silicate 2 parts, Lithium metasilicate 3 parts, 0.4 part of activator；
By mass percentage, described activator includes following component:
Copper powder 60%, magnesium oxide 20%, aluminium powder 10%, glass dust 10%.
Its preparation method is for comprising the steps:
1), by described sodium silicate, magnesium silicate, Lithium metasilicate add in the water of 35 weight portions, press at 6～8 atmospheric pressure Steam reaction and make waterglass；
2), by step 1) waterglass that obtains and described sand grains and described activator mixing and stirring, according to different layers Thickness, in 200 DEG C～250 DEG C solidify 40min～80min molding.
Concrete, described noise reducing plate thickness is 18mm, includes basic unit, intermediate layer and surface layer three layers, described base when molding Layer, intermediate layer and surface layer thickness ratio for 2:10:1.
In described basic unit, described sand grains by the sand grains of 40～100 mesh and the sand grains of 100～120 mesh according to the weight of 4:1 Ratio mixture forms；
In described intermediate layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～300 mesh according to the weight of 1:4 Amount ratio mixture forms；
In described surface layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～200 mesh according to the weight of 1:8 Ratio mixture forms.
Embodiment 3
A kind of porous silica sand noise reducing plate, by weight, described noise reducing plate is mainly made up of following raw material:
Sand grains 80 parts, 4 mould sodium silicate 15 parts, magnesium silicate 3 parts, Lithium metasilicate 2 parts, 0.3 part of activator；
By mass percentage, described activator includes following component:
Copper powder 40%, magnesium oxide 35%, aluminium powder 17%, glass dust 8%.
Its preparation method is for comprising the steps:
1), by described sodium silicate, magnesium silicate, Lithium metasilicate add in the water of 45 weight portions, press at 6～8 atmospheric pressure Steam reaction and make waterglass；
2), by step 1) waterglass that obtains and described sand grains and described activator mixing and stirring, according to different layers Thickness, in 200 DEG C～250 DEG C solidify 40min～80min molding.
Concrete, described noise reducing plate thickness is 22mm, includes basic unit, intermediate layer and surface layer three layers, described base when molding Layer, intermediate layer and surface layer thickness ratio for 2:15:1.
In described basic unit, described sand grains by the sand grains of 40～100 mesh and the sand grains of 100～120 mesh according to the weight of 6:1 Ratio mixture forms；
In described intermediate layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～300 mesh according to the weight of 1:6 Amount ratio mixture forms；
In described surface layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～200 mesh according to the weight of 1:6 Ratio mixture forms.
Embodiment 4
A kind of porous silica sand noise reducing plate, by weight, described noise reducing plate is mainly made up of following raw material:
Sand grains 80 parts, 4 mould sodium silicate 15 parts, magnesium silicate 3 parts, Lithium metasilicate 2 parts, 0.2 part of activator；
By mass percentage, described activator includes following component:
Copper powder 50%, magnesium oxide 25%, aluminium powder 16, glass dust 9%.
Its preparation method is for comprising the steps:
1), by described sodium silicate, magnesium silicate, Lithium metasilicate add in the water of 40 weight portions, press at 6～8 atmospheric pressure Steam reaction and make waterglass；
2), by step 1) waterglass that obtains and described sand grains and described activator mixing and stirring, according to different layers Thickness, in 200 DEG C～250 DEG C solidify 40min～80min molding.
Concrete, described noise reducing plate thickness is 20mm, includes basic unit, intermediate layer and surface layer three layers, described base when molding Layer, intermediate layer and surface layer thickness ratio for 4:13:1.
In described basic unit, described sand grains by the sand grains of 40～100 mesh and the sand grains of 100～120 mesh according to the weight of 5:1 Ratio mixture forms；
In described intermediate layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～300 mesh according to the weight of 1:5 Amount ratio mixture forms；
In described surface layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～200 mesh according to the weight of 1:7 Ratio mixture forms.
Experimental example 1
Comparison of design example based on embodiment 4:
Comparative example 1: described noise reducing plate is set to 20mm thick, monolayer；And the mesh number of sand grains freely divides in 40～300 mesh Cloth, remaining set-up mode is the same as in Example 4.
Comparative example 2: described noise reducing plate is set to 20mm thick, monolayer；Sand grains described in mortar is by the sand grains of 40～80 mesh Form according to the part by weight mixture of 1:5 with the sand grains of 120～300 mesh.
Comparative example 3: described noise reducing plate is set to 20mm thick, three layers, and each layer thickness is consistent with embodiment 4；Difference Place is, in described basic unit, described sand grains by the sand grains of 40～100 mesh and the sand grains of 100～120 mesh according to the weight of 2:1 Ratio mixture forms；In described intermediate layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～300 mesh according to 1:2 Part by weight mixture form；In described surface layer, described sand grains is pressed by the sand grains of 40～80 mesh and the sand grains of 120～200 mesh Part by weight mixture according to 1:4 forms.
Detection embodiment 2～4 and the comparative example 1～3 acoustical absorptivity under alternative sounds frequency, result is as shown in table 1.
Under table 1 different frequency, acoustical absorptivity compares
As can be known from the above table, layered mode of the present invention, and in different layers the particle size content of sand grains to noise reducing plate Acoustical absorptivity impact is very big, and the impact especially for the noise absorption capability of the frequency on the low side of below 500Hz is especially pronounced.
Detection embodiment 2～4 and the comparative example 1～3 sound-insulation capability under alternative sounds frequency, result is as shown in table 1.
Under table 2 different frequency, sound-insulation capability compares
As can be known from the above table, the sound-insulation capability gap of the noise reducing plate of embodiment 2～4 preparation is little, and relative to comparative example 1～ 3 liftings having certain amplitude.
Experimental example 2
Comparison of design example 4 based on embodiment 4, difference is in comparative example 4 to be not added with activator, the general of adaptation Condition of cure changes 460 DEG C～550 DEG C solidification 80min～120min into.
To embodiment 2～4 and the properties of noise reducing plate for preparing of comparative example 4 detect, result is as shown in table 3.
Table 3 performance parameter
As shown in Table 3, the porous silica sand noise reducing plate that various embodiments of the present invention provide, it is respectively provided with outstanding fire resistance property, ring Guaranteed cost, bulking factor and anti-ultraviolet ability are the best, and intensity is high, good weatherability.And comparative example 4 is owing to being not added with Activator, the performance such as mechanical strength, weatherability has and significantly reduces.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent The present invention has been described in detail by pipe with reference to foregoing embodiments, but it will be understood by those within the art that: its Still the technical scheme described in foregoing embodiments can be modified, or to the most some or all of technical characteristic Carry out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention skill The scope of art scheme.

Claims (10)

1. a porous silica sand noise reducing plate, it is characterised in that by weight, described noise reducing plate is mainly made up of following raw material:
Sand grains 75～85 parts, sodium silicate 12～18 parts, magnesium silicate 2～4 parts, Lithium metasilicate 1～3 parts, activator 0.1～0.4 part；
By mass percentage, described activator includes following component:
Copper powder 35%～60%, magnesium oxide 20%～40%, aluminium powder 15%～20%, glass dust 5%～15%.
Porous silica sand noise reducing plate the most according to claim 1, it is characterised in that by mass percentage, described activator Including following component:
Copper powder 40%～50%, magnesium oxide 25%～35%, aluminium powder 16%～18%, glass dust 8%～12%.
Porous silica sand noise reducing plate the most according to claim 1, it is characterised in that described sodium silicate is 4 mould sodium silicate.
Porous silica sand noise reducing plate the most according to claim 3, it is characterised in that the particle diameter of described sand grains is 40～300 mesh.
5. according to the porous silica sand noise reducing plate described in any one of Claims 1 to 4, it is characterised in that described noise reducing plate includes base Layer, intermediate layer and surface layer；
In described basic unit, described sand grains by the sand grains of 40～100 mesh and the sand grains of 100～120 mesh according to (4～6): the weight of 1 Amount ratio mixture forms；
In described intermediate layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～300 mesh according to 1:(4～6) weight Amount ratio mixture forms；
In described surface layer, described sand grains by the sand grains of 40～80 mesh and the sand grains of 120～200 mesh according to 1:(6～8) weight Ratio mixture forms.
Porous silica sand noise reducing plate the most according to claim 5, it is characterised in that the thickness of described porous silica sand noise reducing plate is 18mm～22mm.
Porous silica sand noise reducing plate the most according to claim 5, it is characterised in that the thickness of described basic unit, intermediate layer and surface layer Degree ratio is (2～6): (10～15): 1.
8. the preparation method of the porous silica sand noise reducing plate described in any one of claim 1～7, it is characterised in that include walking as follows Rapid:
1), described sodium silicate, magnesium silicate, Lithium metasilicate are made waterglass；
2), by step 1) waterglass that obtains and described sand grains and described activator mixing and stirring, be heating and curing molding.
The preparation method of porous silica sand noise reducing plate the most according to claim 8, it is characterised in that in step 1) in, described The preparation method of waterglass is:
Described sodium silicate, magnesium silicate, Lithium metasilicate are added in the water of 35～45 weight portions, carry out pressure at 6～8 atmospheric pressure and steam anti- Waterglass should be made.
The preparation method of porous silica sand noise reducing plate the most according to claim 8, it is characterised in that in step 2) in, described The condition of molding of being heating and curing is:
200 DEG C～250 DEG C solidification 40min～80min.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107492369A (en) * 2017-09-21 2017-12-19 北京天润康隆科技股份有限公司 A kind of micropore rock beam series silencer
CN108756107A (en) * 2018-06-27 2018-11-06 燕翔 It is a kind of that sand abatvoix is covered based on mineral wool
CN113860846A (en) * 2020-06-30 2021-12-31 比亚迪股份有限公司 Sound absorption material and preparation method thereof

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CN1050177A (en) * 1989-09-11 1991-03-27 山东建筑材料工业学院 Enclose frame and plant fine foamed cement composition board and manufacturing process thereof
CN101798850A (en) * 2010-03-11 2010-08-11 李珠 Foaming type inorganic heat insulation plate, preparation method thereof and heat insulation layer thereof
CN103526872A (en) * 2013-10-25 2014-01-22 黄海涛 Composite insulating energy-saving light concrete wallboard as well as preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN1050177A (en) * 1989-09-11 1991-03-27 山东建筑材料工业学院 Enclose frame and plant fine foamed cement composition board and manufacturing process thereof
CN101798850A (en) * 2010-03-11 2010-08-11 李珠 Foaming type inorganic heat insulation plate, preparation method thereof and heat insulation layer thereof
CN103526872A (en) * 2013-10-25 2014-01-22 黄海涛 Composite insulating energy-saving light concrete wallboard as well as preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107492369A (en) * 2017-09-21 2017-12-19 北京天润康隆科技股份有限公司 A kind of micropore rock beam series silencer
CN108756107A (en) * 2018-06-27 2018-11-06 燕翔 It is a kind of that sand abatvoix is covered based on mineral wool
CN113860846A (en) * 2020-06-30 2021-12-31 比亚迪股份有限公司 Sound absorption material and preparation method thereof

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