CN106187050B - 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 PDFInfo
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- CN106187050B CN106187050B CN201610543498.5A CN201610543498A CN106187050B CN 106187050 B CN106187050 B CN 106187050B CN 201610543498 A CN201610543498 A CN 201610543498A CN 106187050 B CN106187050 B CN 106187050B
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- 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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- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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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Abstract
The present invention relates to general acoustic barrier material field, in particular to a kind of porous silica sand noise reducing plate.The noise reducing plate is mainly made of following raw material：75~85 parts of sand grains, 12~18 parts of sodium metasilicate, 2~4 parts of magnesium silicate, 1~3 part of lithium metasilicate, 0.1~0.4 part of activator；By mass percentage, the activator includes following component：Copper powder 35%~60%, magnesia 20%~40%, aluminium powder 15%~20%, glass dust 5%~15%.Porous silica sand noise reducing plate provided by the invention cures after being mixed by the sand grains of different-grain diameter with the silicate of specific proportioning and activator according to its special ratios, when sound wave is incident under the condition of incidence of multi-angle in plate and transverse crossing is propagated between sand grains in plate, the sound wave of specific frequency, which can be formed, interferes sound energy consumption, and referred to as phase type absorbs sound；In addition, the noise reducing plate also has outstanding intensity, flame retardant property and weather resistance are also fine.
Description
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 its preparation
Method.
Background technology
With the development of modern industry and transportation business and the enhancing of environmental consciousness, people want acoustic environment
Ask also higher and higher, sqouynd absorption lowering noise, which is increasingly becoming a related high-tech, environment and the mankind and develops in harmony, is badly in need of what is solved
Important topic.
Common sound absorption and sound insulating material currently on the market, the performances such as usual fire prevention, weather-proof, intensity, sound absorption and sound insulation are not
It is good, the problem of various is leaked out cruelly in application.Need to work out one kind and can prevent fires, is weather-proof, physical and chemical performance it is excellent,
Meet the novel noise reduction plate of sound absorption and sound insulation requirement again.
In view of this, it is special to propose the present invention.
Invention content
The first object of the present invention is to provide a kind of porous silica sand noise reducing plate, the porous silica sand noise reducing plate intensity
Height has excellent weather resistance, and flame retardant property is also fine.
The second object of the present invention is to provide a kind of preparation method of the porous silica sand noise reducing plate, this method operation
Simply, it is easy to implement.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
A kind of porous silica sand noise reducing plate, by weight, the noise reducing plate is mainly made of following raw material：
75~85 parts of sand grains, 12~18 parts of sodium metasilicate, 2~4 parts of magnesium silicate, 1~3 part of lithium metasilicate, activator 0.1~0.4
Part；
By mass percentage, the activator includes following component：
Copper powder 35%~60%, magnesia 20%~40%, aluminium powder 15%~20%, glass dust 5%~15%.
Sand grains main component is quartz or mineral grain, and voidage is big, can provide architecture basics for sound-absorbing material；
The effect of silicate is mainly to provide cohesive force to promote the molding of noise reducing plate, while assign silica sand noise reducing plate with fire-retardant
Performance and enough intensity.Silica sand noise reducing plate sand grains content provided by the invention is higher, in order to provide outstanding adhesive property and
Excessive interference is not caused to the porosity of sound-absorbing material, it is therefore preferable that silicate is as shaping raw material.Energy is molded to strengthen it
Power can also add a part of Portland clinker etc. as auxiliary binder wherein.
Sodium metasilicate is a kind of water-soluble silicate, is a kind of inorganic binder, and cohesive force is strong, intensity is higher, acid resistance,
It is heat-resist, it is the main component of silicate adhesive；
After magnesium silicate and other different materials are compound, there is excellent heat-insulated, fire prevention, compressive property, be preferably to build
Energy-saving material；
Lithium metasilicate is lithium metal and a series of compound generated during silica reaction, can be coordinated with sodium metasilicate, magnesium silicate
Form firm binder.
Specifically, silicate is to be worked in the form of waterglass as inorganic adhesive.Compared with Organic adhesive,
Silicate adhesive has many advantages, such as that flame resistance is good, acid resistance is strong, environment-protecting and non-poisonous, preparation process is simple, and provided by the invention
Silicate proportioning durability is good, and gluing performance is strong, and manufactured silica sand noise reducing plate intensity is high.
The activator can be modified waterglass, enhance its performance, reduce solidification temperature.
Preferably, by mass percentage, the activator includes following component：
Copper powder 40%~50%, magnesia 25%~35%, aluminium powder 16%~18%, glass dust 8%~12%.
Although there is various advantages for silicate adhesive, its shortcoming is also than more prominent, i.e., adhesion strength is low.For it
This shortcoming, the present invention are modified it to make it have outstanding adhesion strength and water resistance by the method for activator.
For silicate adhesive during dehydrating and curing, the free hydroxyl of silicate can be with curing agent (in the present invention,
For the silica in sand grains) and activator merge to be formed using the reticular structure for the similar ceramics that curing agent is core.
Wherein, copper powder can be oxidized to CuO in the curing process, and CuO can effectively enhance the shear strength of adhesive, and
CuO can also effectively be reduced solidification temperature and hardening time；
Aluminium powder can equally be oxidized to Al2O3, can also generate a part of Al (OH)3；The additive amount of aluminium powder and magnesia is equal
It is to be adapted with the additive amount of copper powder, can be used to increase the weatherability and shear strength of silicate adhesive；
Glass powder is inorganic stabilized hard particle, and it is PbO, SiO that raw material is used in production2、TiO2Electron levels raw material is waited to mix
After even, then high temperature carries out solid phase reaction, forms the glass isotropic body of disordered structure, chemical property is stablized, available for increasing silicic acid
The weatherability and corrosion resistance of salt adhesive.
Preferably, porous silica sand noise reducing plate as described above, the sodium metasilicate are 4 mould sodium metasilicate.
The molecular formula of sodium metasilicate is Na2O·nSiO2, mixing ratio, that is, SiO of quartz sand and alkali2And Na2The molar ratio of O is determined
Determine the modulus n of sodium metasilicate, modulus is the composition for showing sodium metasilicate, and modulus is the important parameter of sodium metasilicate, generally 1.5~
Between 3.5.Modulus is bigger, and sodium silicate solid is more insoluble in water, and normal-temperature water can dissolve when n is 1, and n needs hot water ability when increasing
Dissolving needs steam more than 4 atmospheric pressure that could dissolve when n is more than 3.Sodium metasilicate modulus is bigger, and silica content is more, silicic acid
Sodium viscosity increases, easily decomposes hardening, cohesive force increase, therefore the sodium metasilicate of different moduluses has different use.
One aspect of the present invention needs to reduce the additive amount of adhesive to the greatest extent, and on the one hand cannot compromise the strong of sound-absorbing material again
Degree, therefore the magnesium silicate of 4 mould sodium metasilicate and set proportioning and lithium metasilicate cooperation are preferably employed, it is effectively increased the strong of gluing
Degree.
Preferably, porous silica sand noise reducing plate as described above, the grain size of the sand grains is 40~300 mesh.
Sound-absorbing material is mostly some porous materials, and when sound wave enters in the hole of porous material, air divides between causing gap
Son, fiber vibration the effects that due to the frictional resistance of air and hole, the viscosity resistance of air, heat transfer, make most of acoustic energy
Become thermal dissipation, play sound absorption.General density is small, the material more than hole, and sound absorption effect is good；It is close structure, smooth, hard
Hard material, sound absorption effect are poor.Due to more than, the grain size of sand grains has the assimilation effect of noise important influence.
Preferably, porous silica sand noise reducing plate as described above, the noise reducing plate include base, middle layer knead dough layer；
In the base, the sand grains is by the sand grains of 40~100 mesh and the sand grains of 100~120 mesh according to (4~6):1
Weight ratio mixture form.
The grain size of the sand grains is 250~300 mesh；
In the middle layer, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~300 mesh according to 1：(4~6)
Weight ratio mixture form；
In the layer of the face, the sand grains is 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.
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 with material of sound increases and increases, thus the mode of generally use increase thickness enhances to low frequency noise
Absorbability.The three-decker of different aperture is formed porous silica sand noise reducing plate by the present invention, after sound wave incident is to silica sand plate,
Sound wave passes through under the condition of incidence of multi-angle in plate between sand grains, mutual when the sound wave of specific frequency passes through between sand grains
Interfere sound energy consumption, referred to as phase type absorbs sound.Plank made of such technique, because with higher surface density, and have
Higher oise insulation factor.Dual characteristics with sound absorption with sound insulation realize sound absorption in the noise reduction purpose of one.
In this application, the difference of base, middle layer knead dough layer is only that the grain size of sand grains is different, composition proportion and system
Preparation Method is the same, and raw material composition is configured in a manner mentioned above.
Preferably, porous silica sand noise reducing plate as described above, the thickness of the porous silica sand noise reducing plate is 18mm~22mm.
Plank made of such technique, density are usually 1500~1800kg/m3, the plate thickness that usually prepares for 18mm~
22mm, surface density are 30~36kg/mm2.Because porous silica sand noise reducing plate has higher surface density, in addition to having strong suction
Outside the characteristics of sound, also there is higher ontology oise insulation factor.That is the sound barrier that porous silica sand noise reducing plate is prepared has
The dual characteristics of sound absorption and sound insulation realize sound absorption in the noise reduction purpose of one.
Preferably, porous silica sand noise reducing plate as described above, the base, middle layer knead dough layer thickness ratio for (2~
6)：(10~15)：1.
There is conclusive influence at the thick bottom of noise reducing plate different level with hole on its sqouynd absorption lowering noise ability.
The preparation method of porous silica sand noise reducing plate as described above, includes the following steps：
1) waterglass, is made in the sodium metasilicate, magnesium silicate, lithium metasilicate；
2), the waterglass that step 1) obtains and the sand grains and the activator are mixed evenly, are heated and cured into
Type.
The preparation method is simple and practicable, conducive to operation.
Preferably, the preparation method of porous silica sand noise reducing plate as described above, in step 1), the preparation of the waterglass
Method is：
The sodium metasilicate, magnesium silicate, lithium metasilicate are added in the water of 35~45 parts by weight, pressed in 6~8 atmospheric pressure
It steams reaction and waterglass is made.
Due to using main component of the high mould sodium metasilicate as adhesive in the present invention, and modulus is bigger, cohesive force increase,
But its solubility also constantly reduces simultaneously, thus 6~8 atmospheric pressure is used 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 described above, in step 2), the molding that is heating and curing
Condition be：
200 DEG C~250 DEG C curing 40min~80min.
Due to the addition of activator, solidification temperature of the invention and hardening time are minimized, and cure at this temperature
Noise reducing plate intensity height, the endurance of cutting arrived can be good.
Compared with prior art, beneficial effects of the present invention are：
1), porous silica sand noise reducing plate provided by the invention is by the sand grains of different-grain diameter and the silicate of specific proportioning and activation
Agent cures after being mixed according to its special ratios.When sand grains is bonded together by silicate using special process, sand grains it
Between natively form a large amount of, irregular, interconnected micro-pore.By this manufacture craft, sand grains grain size with into
Type mode can accurately regulate and control, and then the size and arrangement mode of internal void is determined, thus produce various not cocurrent flows
Resistance and the noise reducing plate of sound absorption characteristics.
2), 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.It is low
The sound absorption properties thickness with material of frequency sound increases and increases, thus the mode of generally use increase thickness enhances and makes an uproar to 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 to silica sand plate
Afterwards, sound wave forms targetedly phase and does when the transverse crossing between the sand grains in plate is propagated under the condition of incidence of multi-angle
It relates in muffler plate and is passed through between sand grains, sound energy consumption is interfered when the sound wave of specific frequency passes through between sand grains, referred to as
Phase type absorbs sound.Plank made of such technique, because with higher surface density, and with higher oise insulation factor.With suction
Sound and the dual characteristics of sound insulation realize sound absorption in the noise reduction purpose of one.
3), the present invention provides a kind of New Type Silicate activator, the activator and the silicates of specific proportioning to coordinate,
It is good to bind effect, intensity is high, also with flame retardant property and weather resistance, and the sound absorption effect of material in itself is not impacted.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person, the condition suggested according to normal condition or manufacturer carry out.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
Embodiment 1
A kind of porous silica sand noise reducing plate, by weight, the noise reducing plate is mainly made of following raw material：
75 parts of sand grains, 12 parts of sodium metasilicate, 4 parts of magnesium silicate, 1 part of lithium metasilicate, 0.1 part of activator；
By mass percentage, the activator includes following component：
Copper powder 35%, magnesia 40%, aluminium powder 20%, glass dust 5%.
Preparation method is includes the following steps：
1) waterglass, is made in the sodium metasilicate, magnesium silicate, lithium metasilicate；
2), the waterglass that step 1) obtains and the sand grains and the activator are mixed evenly, are heated and cured into
Type.
Embodiment 2
A kind of porous silica sand noise reducing plate, by weight, the noise reducing plate is mainly made of following raw material：
85 parts of sand grains, 18 parts of 4 mould sodium metasilicate, 2 parts of magnesium silicate, 3 parts of lithium metasilicate, 0.4 part of activator；
By mass percentage, the activator includes following component：
Copper powder 60%, magnesia 20%, aluminium powder 10%, glass dust 10%.
Preparation method is includes the following steps：
1), the sodium metasilicate, magnesium silicate, lithium metasilicate are added in the water of 35 parts by weight, pressed in 6~8 atmospheric pressure
It steams reaction and waterglass is made；
2), the waterglass that step 1) obtains and the sand grains and the activator are mixed evenly, according to different layers
Thickness, in 200 DEG C~250 DEG C cure 40min~80min molding.
Specifically, the noise reduction plate thickness is 18mm, at the time of molding including base, three layers of middle layer knead dough layer, the base
Layer, middle layer knead dough layer thickness ratio be 2：10：1.
In the base, the sand grains is by the sand grains of 40~100 mesh and the sand grains of 100~120 mesh according to 4:1 weight
Ratio mixture forms；
In the middle layer, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~300 mesh according to 1：4 weight
Amount ratio mixture forms；
In the layer of the face, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~200 mesh according to 1：8 weight
Ratio mixture forms.
Embodiment 3
A kind of porous silica sand noise reducing plate, by weight, the noise reducing plate is mainly made of following raw material：
80 parts of sand grains, 15 parts of 4 mould sodium metasilicate, 3 parts of magnesium silicate, 2 parts of lithium metasilicate, 0.3 part of activator；
By mass percentage, the activator includes following component：
Copper powder 40%, magnesia 35%, aluminium powder 17%, glass dust 8%.
Preparation method is includes the following steps：
1), the sodium metasilicate, magnesium silicate, lithium metasilicate are added in the water of 45 parts by weight, pressed in 6~8 atmospheric pressure
It steams reaction and waterglass is made；
2), the waterglass that step 1) obtains and the sand grains and the activator are mixed evenly, according to different layers
Thickness, in 200 DEG C~250 DEG C cure 40min~80min molding.
Specifically, the noise reduction plate thickness is 22mm, at the time of molding including base, three layers of middle layer knead dough layer, the base
Layer, middle layer knead dough layer thickness ratio be 2：15：1.
In the base, the sand grains is by the sand grains of 40~100 mesh and the sand grains of 100~120 mesh according to 6:1 weight
Ratio mixture forms；
In the middle layer, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~300 mesh according to 1：6 weight
Amount ratio mixture forms；
In the layer of the face, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~200 mesh according to 1：6 weight
Ratio mixture forms.
Embodiment 4
A kind of porous silica sand noise reducing plate, by weight, the noise reducing plate is mainly made of following raw material：
80 parts of sand grains, 15 parts of 4 mould sodium metasilicate, 3 parts of magnesium silicate, 2 parts of lithium metasilicate, 0.2 part of activator；
By mass percentage, the activator includes following component：
Copper powder 50%, magnesia 25%, aluminium powder 16, glass dust 9%.
Preparation method is includes the following steps：
1), the sodium metasilicate, magnesium silicate, lithium metasilicate are added in the water of 40 parts by weight, pressed in 6~8 atmospheric pressure
It steams reaction and waterglass is made；
2), the waterglass that step 1) obtains and the sand grains and the activator are mixed evenly, according to different layers
Thickness, in 200 DEG C~250 DEG C cure 40min~80min molding.
Specifically, the noise reduction plate thickness is 20mm, at the time of molding including base, three layers of middle layer knead dough layer, the base
Layer, middle layer knead dough layer thickness ratio be 4：13：1.
In the base, the sand grains is by the sand grains of 40~100 mesh and the sand grains of 100~120 mesh according to 5:1 weight
Ratio mixture forms；
In the middle layer, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~300 mesh according to 1：5 weight
Amount ratio mixture forms；
In the layer of the face, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~200 mesh according to 1：7 weight
Ratio mixture forms.
Experimental example 1
It is basic comparison of design example with embodiment 4：
Comparative example 1：The noise reducing plate is set as 20mm thickness, individual layer；And the mesh number of sand grains is freely divided in 40~300 mesh
Cloth, remaining set-up mode are same as Example 4.
Comparative example 2：The noise reducing plate is set as 20mm thickness, individual layer；Sand grains described in mortar by 40~80 mesh sand grains
Sand grains with 120~300 mesh is according to 1:5 weight ratio mixture forms.
Comparative example 3：The noise reducing plate is set as 20mm thickness, three layers, and each layer thickness and embodiment 4 are consistent；Difference
It is in in the base, the sand grains is by the sand grains of 40~100 mesh and the sand grains of 100~120 mesh according to 2:1 weight
Ratio mixture forms；In the middle layer, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~300 mesh according to 1:2
Weight ratio mixture form；In the layer of the face, the sand grains is pressed by the sand grains of 40~80 mesh and the sand grains of 120~200 mesh
According to 1：4 weight ratio mixture forms.
The acoustical absorptivity of embodiment 2~4 and comparative example 1~3 under alternative sounds frequency is detected, the results are shown in Table 1.
Acoustical absorptivity compares under 1 different frequency of table
As can be known from the above table, the particle size content of layered mode and different layers sand grains of the present invention is to noise reducing plate
Acoustical absorptivity influence is very big, and the influence especially for the noise absorption capability of the relatively low frequency of below 500Hz is especially pronounced.
The sound-insulation capability of embodiment 2~4 and comparative example 1~3 under alternative sounds frequency is detected, the results are shown in Table 1.
Sound-insulation capability compares under 2 different frequency of table
As can be known from the above table, embodiment 2~4 prepare noise reducing plate sound-insulation capability gap it is little, and relative to comparative example 1~
3 have the promotion of certain amplitude.
Experimental example 2
Be basic comparison of design example 4 with embodiment 4, the difference lies in being not added with activator in comparative example 4, adaptation general
Condition of cure is changed to 460 DEG C~550 DEG C curing 80min~120min.
The properties of noise reducing plate made from embodiment 2~4 and comparative example 4 are detected, the results are shown in Table 3.
3 performance parameter of table
As shown in Table 3, the porous silica sand noise reducing plate that various embodiments of the present invention provide, is respectively provided with outstanding fire resistance property, ring
Guaranteed cost, bulking factor and anti-ultraviolet ability are also all very good, and intensity is high, good weatherability.And comparative example 4 is due to being not added with
Activator, the performances such as mechanical strength, weatherability have and significantly reduce.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, but it will be understood by those of ordinary skill in the art that：Its
It can still modify to the technical solution recorded in foregoing embodiments either to which part or all technical features
Carry out equivalent replacement；And these modifications or replacement, various embodiments of the present invention skill that it does not separate the essence of the corresponding technical solution
The range of art scheme.
Claims (7)
1. a kind of porous silica sand noise reducing plate, which is characterized in that by weight, the noise reducing plate is made of following raw material：
75~85 parts of sand grains, 12~18 parts of sodium metasilicate, 2~4 parts of magnesium silicate, 1~3 part of lithium metasilicate, 0.1~0.4 part of activator；
By mass percentage, the activator is selected from following component：
Copper powder 35%~60%, magnesia 20%~40%, aluminium powder 15%~20%, glass dust 5%~15%；
The noise reducing plate includes base, middle layer knead dough layer；
In the base, the sand grains is by the sand grains of 40~100 mesh and the sand grains of 100~120 mesh according to (4~6):1 weight
Amount ratio mixture forms；
In the middle layer, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~300 mesh according to 1：The weight of (4~6)
Amount ratio mixture forms；
In the layer of the face, the sand grains is by the sand grains of 40~80 mesh and the sand grains of 120~200 mesh according to 1：The weight of (6~8)
Ratio mixture forms；
The thickness of the porous silica sand noise reducing plate is 18mm~22mm；
The base, middle layer knead dough layer thickness ratio be (2~6)：(10~15)：1.
2. porous silica sand noise reducing plate according to claim 1, which is characterized in that by mass percentage, the activator
Selected from following component：
Copper powder 40%~50%, magnesia 25%~35%, aluminium powder 16%~18%, glass dust 8%~12%.
3. porous silica sand noise reducing plate according to claim 1, which is characterized in that the sodium metasilicate is 4 mould sodium metasilicate.
4. porous silica sand noise reducing plate according to claim 3, which is characterized in that the grain size of the sand grains is 40~300 mesh.
5. the preparation method of the porous silica sand noise reducing plate of Claims 1 to 4 any one of them, which is characterized in that including walking as follows
Suddenly：
1) waterglass, is made in the sodium metasilicate, magnesium silicate, lithium metasilicate；
2), the waterglass that step 1) obtains and the sand grains and the activator are mixed evenly, be heating and curing molding.
6. the preparation method of porous silica sand noise reducing plate according to claim 5, which is characterized in that described in step 1)
The preparation method of waterglass is：
The sodium metasilicate, magnesium silicate, lithium metasilicate are added in the water of 35~45 parts by weight, carrying out pressure in 6~8 atmospheric pressure steams instead
Waterglass should be made.
7. the preparation method of porous silica sand noise reducing plate according to claim 5, which is characterized in that described in step 2)
The condition of molding of being heating and curing is：
200 DEG C~250 DEG C curing 40min~80min.
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| CN108756107B (en) * | 2018-06-27 | 2020-01-31 | 燕翔 | sand-lined acoustic panel based on glass wool |
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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 |
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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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