CN115784766A - Crop straw type gypsum plastering sound-insulation coating and preparation method and application thereof - Google Patents
Crop straw type gypsum plastering sound-insulation coating and preparation method and application thereof Download PDFInfo
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- 239000010902 straw Substances 0.000 title claims abstract description 126
- 239000011248 coating agent Substances 0.000 title claims abstract description 46
- 238000000576 coating method Methods 0.000 title claims abstract description 46
- 238000009413 insulation Methods 0.000 title claims abstract description 36
- 239000010440 gypsum Substances 0.000 title claims abstract description 33
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000843 powder Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000011507 gypsum plaster Substances 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 17
- 229920002472 Starch Polymers 0.000 claims abstract description 16
- 239000008107 starch Substances 0.000 claims abstract description 16
- 235000019698 starch Nutrition 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 9
- -1 retarder Substances 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract 2
- 239000004411 aluminium Substances 0.000 claims abstract 2
- 238000003756 stirring Methods 0.000 claims description 16
- 239000008199 coating composition Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims description 5
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 5
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims description 5
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims description 5
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 239000001341 hydroxy propyl starch Substances 0.000 claims description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 3
- 235000013828 hydroxypropyl starch Nutrition 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 235000014676 Phragmites communis Nutrition 0.000 claims description 2
- 241000209140 Triticum Species 0.000 claims description 2
- 235000021307 Triticum Nutrition 0.000 claims description 2
- 240000008042 Zea mays Species 0.000 claims description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 2
- 235000005822 corn Nutrition 0.000 claims description 2
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 claims description 2
- 150000004682 monohydrates Chemical class 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 239000012774 insulation material Substances 0.000 abstract description 5
- 231100000956 nontoxicity Toxicity 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 9
- 238000009472 formulation Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000002994 raw material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 230000000844 anti-bacterial effect Effects 0.000 description 4
- 239000003899 bactericide agent Substances 0.000 description 4
- 239000001509 sodium citrate Substances 0.000 description 4
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 235000013339 cereals Nutrition 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- MGIYRDNGCNKGJU-UHFFFAOYSA-N isothiazolinone Chemical compound O=C1C=CSN1 MGIYRDNGCNKGJU-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000001433 sodium tartrate Substances 0.000 description 2
- 229960002167 sodium tartrate Drugs 0.000 description 2
- 235000011004 sodium tartrates Nutrition 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to the field of building sound insulation materials, and discloses a crop straw type gypsum plastering sound insulation coating, and a preparation method and application thereof. The method comprises the following steps: (1) Carrying out low-temperature treatment on the straw I with the average particle size of R1 to obtain low-temperature straw I with the temperature not higher than-30 ℃; wherein R1 is less than 5mm; (2) Grinding the low-temperature straw I in the presence of a grinding medium to obtain straw II with the average particle size of R2; wherein R2 is 100-200 μm; (3) Cleaning and drying the straw II in sequence to obtain straw powder with the water content not higher than 5 wt% per mill; (4) Gypsum, cellulose ether, retarder, starch ether, aluminium powder and Ca (OH) 2 And mixing the straw powder with the straw powder to obtain the straw gypsum plaster sound insulation coating. The straw type gypsum plastering soundproof coating provided by the invention has soundproof effectGood adhesion, environmental protection and no toxicity.
Description
Technical Field
The invention relates to the field of building sound insulation materials, in particular to a crop straw type gypsum plastering sound insulation coating and a preparation method and application thereof.
Background
Along with the continuous progress of society, the attention of governments and residents in China to environmental noise is higher and higher, and in order to achieve the purposes of sound insulation and noise reduction, a sound insulation material is generally coated inside a house or on the surface of a building needing sound insulation, and the purpose of weakening sound energy is achieved by blocking sound transmission or reducing sound reflection.
Currently, most of sound insulation materials are sound insulation mortar or sound insulation boards: the sound insulation mortar belongs to application of sawdust cement-based materials in building, is generally thickly coated with 2-3 cm, and the sawdust and a thicker coating prolong the propagation time of sound on the coating and reduce the sound wave capability of the sawdust through vibration so as to damp the sound. However, as the cement is cured and the water is volatilized, the wall body can be dried and cracked; or plastic cracking is generated due to the hardness and brittleness of the cement at the later stage, so that the sound insulation effect of the coating is seriously influenced.
For the use of the sound insulation board, some foaming materials and sound insulation fibers are generally added into the coating, so that the coating contains more holes, the labyrinth effect in the coating is increased, sound rebounds for many times in the transmission process, the sound capacity is converted into mechanical energy and heat energy, and the sound enables the sound insulation fibers to vibrate in the transmission process, thereby consuming the sound energy. However, the foamed sound insulation board has poor strength and is easily damaged by external force, and a good protective layer needs to be made on the foamed sound insulation board; in addition, most of the soundproof fibers are cotton formed of glass fibers, which is harmful to the human body and is not environmentally friendly, and most of the soundproof plates have no adhesive ability.
Therefore, it is an industrial problem that needs to be solved at present to improve the adhesion and environmental protection of the sound-insulating material while ensuring the long-term sound-insulating effect.
Disclosure of Invention
The invention aims to overcome the defects of poor sound insulation effect, poor durability, low adhesion and environmental protection of the sound insulation material in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a method for preparing a straw-based gypsum plaster soundproof coating, the method comprising:
(1) Carrying out low-temperature treatment on the straw I with the average particle size of R1 to obtain low-temperature straw I with the temperature not higher than-30 ℃; wherein R1 is less than 5mm;
(2) Grinding the low-temperature straw I in the presence of a grinding medium to obtain straw II with the average particle size of R2; wherein R2 is 100-200 μm;
(3) Sequentially cleaning and drying the straw II to obtain straw powder with the water content not higher than 5 wt% per mill;
(4) Mixing gypsum, cellulose ether, retarder, starch ether, aluminum powder, ca (OH) 2 And the strawMixing the straw powder to obtain the straw type gypsum plastering sound insulation coating; wherein the weight ratio of the gypsum to the straw powder is 5-10:1.
the second aspect of the invention provides the straw-type gypsum plaster sound-insulating coating prepared by the method in the first aspect.
In a third aspect of the invention, there is provided the use of the straw-based gypsum plaster acoustical coating of the second aspect in building sound insulation.
The scheme provided by the invention has the following specific advantages:
(1) The crop straws are used as the bio-based material, so that the environment is protected, the price is low, the generation of agricultural wastes can be reduced, and the concept of circular development is met;
(2) The paint provided by the invention has a good sound insulation effect, can be directly sprayed on a putty layer, has a total thickness of 3-5mm, and has strong bonding force with the putty layer and good durability.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For numerical ranges, each range between its endpoints and individual point values, and each individual point value can be combined with each other to give one or more new numerical ranges, and such numerical ranges should be construed as specifically disclosed herein.
As described above, the first aspect of the present invention provides a method for preparing a straw-based gypsum plaster soundproof coating, comprising:
(1) Carrying out low-temperature treatment on the straw I with the average particle size of R1 to obtain low-temperature straw I with the temperature not higher than-30 ℃; wherein R1 is less than 5mm;
(2) Grinding the low-temperature straw I in the presence of a grinding medium to obtain straw II with the average particle size of R2; wherein R2 is 100-200 μm;
(3) Cleaning and drying the straw II in sequence to obtain straw powder with the water content not higher than 5 wt% per mill;
(4) Mixing stonePaste, cellulose ether, retarder, starch ether, aluminum powder, ca (OH) 2 Mixing the straw powder with the straw powder to obtain the straw gypsum plaster sound insulation coating; wherein the weight ratio of the gypsum to the straw powder is 5-10:1.
according to a preferred embodiment, the method of the invention further comprises: before the low-temperature treatment, the raw material straws are aired in the open air (the airing temperature is not lower than 25 ℃, the airing time is 60-80h, and the airing period is not rainy), then the aired raw material straws are beaten to remove dust and soil, and then are crushed, so that the straws I with the average particle size of R1, which can be subjected to the low-temperature treatment, are obtained.
In order to make the prepared plastering soundproof coating have better soundproof performance and higher durability, in the step (1), the temperature of the low-temperature straw I is preferably-60 ℃ to-30 ℃.
In the present invention, the manner of the low-temperature treatment is not particularly required, and may be performed by freezing, for example.
Preferably, in step (1), said R1 is less than 3mm.
Preferably, in step (2), said R2 is 120-180 μm.
Preferably, in the step (3), the water content of the straw powder is less than 3 wt%.
Preferably, in the step (4), gypsum, cellulose ether, retarder, starch ether, aluminum powder, ca (OH) 2 The operation of mixing the straw powder comprises the following steps:
based on 1000 parts by weight of the total weight of the coating composition, 821-850 parts by weight of gypsum, 100-150 parts by weight of straw powder, 2-3 parts by weight of cellulose ether, 1-1.5 parts by weight of retarder, 0.5-1 part by weight of starch ether, 10-12 parts by weight of aluminum powder and 10-12 parts by weight of Ca (OH) 2 Performing the mixing, wherein the total weight of the coating composition is the gypsum, the cellulose ether, the retarder, the starch ether, the aluminum powder, the Ca (OH) 2 And the weight of the straw powder.
Preferably, the straw I is selected from at least one of wheat straw, corn straw, reed straw and rice straw.
Preferably, the grinding media is quartz sand having an average particle size of 50 to 80 μm and a Mohs hardness of 7.2 to 7.5.
According to a preferred embodiment, the method of the invention further comprises: in the step (2), the temperature of the grinding is below-10 ℃.
Preferably, the gypsum is selected from at least one of hemihydrate gypsum and monohydrate gypsum. More preferably, the gypsum is hemihydrate gypsum.
Preferably, the cellulose ether is selected from at least one of hydroxyethyl cellulose ether and hydroxypropyl cellulose ether. More preferably, the cellulose ether is a hydroxypropyl cellulose ether. The inventor finds that the rheological property of the plastering soundproof paint prepared in the preferred case is better.
Preferably, the retarder is selected from at least one of sodium tartrate and sodium citrate. More preferably, the set retarder is sodium citrate.
Preferably, the starch ether is selected from at least one of hydroxypropyl starch ether and hydroxymethyl starch ether.
Preferably, the average particle diameter R3 of the aluminum powder is 5-100 μm. More preferably, the average particle diameter R3 of the aluminum powder is 10 to 40 μm.
Preferably, in the step (1), the time for the low-temperature treatment is 20 to 40 hours.
Preferably, in step (3), the washing is performed under stirring, and the washing conditions include: the stirring speed is 600-800r/min, and the stirring time is 5-8min.
Preferably, the mixing is carried out under stirring and the mixing conditions include: the stirring speed is 600-1000r/min, and the stirring time is 5-10min.
According to a preferred embodiment, the method further comprises: the cleaning is carried out by using water, and in the water for cleaning, the weight ratio of the water to the bactericide is 50-100:1, standing for 100-150min after the cleaning is finished, filtering the upper suspension to obtain filter residue, namely filtered straw powder, and repeatedly cleaning the filtered straw powder for 2-3 times.
Preferably, the bactericide is selected from at least one of isothiazolinone and its derivatives.
In the present invention, the drying method is not required, and may be performed by a conventional technique in the art, for example, by a drying oven.
According to a particularly preferred embodiment, in the present invention, the temperature of the low-temperature straw I is-60 ℃ to-30 ℃, the R1 is less than 3mm, the R2 is 120 to 180 μm, the water content of the straw powder is less than 3wt%, the average particle diameter R3 of the aluminum powder is 10 to 40 μm, the gypsum is hemihydrate gypsum, the cellulose ether is hydroxypropyl cellulose ether, and the retarder is sodium citrate. The inventor finds that the sound insulation performance of the plastering sound insulation coating prepared in the preferred case is better.
As mentioned above, the second aspect of the invention provides the straw-based gypsum plaster soundproof coating prepared by the method of the first aspect.
As previously mentioned, a third aspect of the present invention provides the use of the straw-based gypsum plaster acoustical coating of the second aspect in building sound insulation.
The straw type gypsum plaster sound insulation coating prepared by the method provided by the invention has the advantages of good sound insulation effect, high durability, strong adhesion, environmental protection and no toxicity.
The present invention will be described in detail below by way of examples, and all of the raw materials used are common commercial products unless otherwise specified.
Raw material straw: rice straw with water content of 3wt%;
gypsum: hemihydrate gypsum, available from Shandong Xinding Biotech Co., ltd, with a brand number of A2018;
cellulose ether I: hydroxypropyl cellulose ether, available from chemical engineering, hogchuan, australia, under the brand name SC-10M;
cellulose ether II: hydroxyethyl cellulose ether available from chemical co, kraine, germany, under the designation HS30000YP2;
a retarder I: sodium citrate, available from xu hun-shun biotechnology ltd, under the designation 1101;
a retarder II: sodium tartrate, available from Tianjin Jinhui Taiya Chemicals Co., ltd, CAS number 6106-24-7;
starch ether: hydroxypropyl starch ether, available from Shandong Fujieda chemical group Co., ltd, under the brand name FYD-019;
aluminum powder I: the average grain diameter R3 is 75 μm, and is purchased from Kuaixiang alloy materials Co., ltd;
aluminum powder II: the average grain diameter R3 is 30 μm, and is purchased from Kuaixiang alloy materials Co., ltd;
Ca(OH) 2 : purchased from chemical Limited of Jinan Longteng, under the brand name of 14-2-8;
quartz sand: available from Sichuan Union annular science and technology, inc., and has a Mohs hardness of 7.5.
A drying oven: the gauge was 202-0, internal dimensions 250 × wide and 250mm deep (no blast galvanizing), available from Xinqi mechanical devices, inc., dongguan.
In the following examples, the formulation of the coating composition shown in table 1 was designed, the sum of the weights of the components in the coating composition was determined to be 1000 parts by weight to perform a test, and the corresponding components were weighed out exactly (to the gram) according to the formulation of the coating composition, wherein 10 grams are represented per "part by weight" unless otherwise specified.
The impact improvement effect of the coating on the floor slab is tested: according to GBT19889.8-2006 acoustic building and construction component sound insulation measurement, part 8: the laboratory measurement test requirement of the improvement quantity of the impact sound of the covering layer of the heavy standard floor is carried out;
the compressive strength of the coating and the bonding strength of the putty layer are tested: the method is carried out according to the operation of JCT984-2011 polymer cement waterproof mortar.
In the following examples, the resulting partial straw-based gypsum plaster acoustical coating product was subjected to relevant performance tests, and the results are shown in table 2.
In the following examples, the straw I was prepared by the following steps, without specific reference:
the method comprises the steps of airing raw material straws in the open air (the airing temperature is not lower than 25 ℃, the airing time is 72 hours in total, and the airing period is not drenched), then beating the aired raw material straws to remove dust and soil, and then crushing the straws to different degrees to obtain the straws I which can be subjected to low-temperature treatment and meet the requirements and have the average particle size of R1.
In the following examples, which are not specifically illustrated, the straw II is washed with water, and the washing water contains 80% by weight of water to bactericide: 1, adding a bactericide (isothiazolinone), standing for 140min after the cleaning is finished, filtering the upper suspension to obtain filter residue, namely filtered straw powder, and repeatedly cleaning the filtered straw powder for 3 times.
Example 1
This example illustrates the preparation of a straw-based gypsum plaster acoustical coating according to the present invention according to the formulation and process parameters of table 1.
The method for preparing the straw type gypsum plastering sound insulation coating comprises the following steps:
(1) Carrying out low-temperature treatment on the straw I with the average particle size of R1 to obtain low-temperature straw I;
wherein R1 is 2mm, the low-temperature treatment is carried out at the temperature of minus 40 ℃ in a freezing mode for 20 hours to obtain low-temperature straw I at the temperature of minus 40 ℃;
(2) Grinding the low-temperature straw I in the presence of a grinding medium to obtain straw II with the average particle size of R2;
wherein R2 is 120 μm, the grinding temperature is-15 ℃, and the grinding medium is quartz sand with the average grain diameter of 70 μm and the Mohs hardness of 7.5;
(3) Cleaning and drying the straw II in sequence to obtain straw powder; marking the obtained straw powder as straw powder I, and drying until the water content is 2wt per mill;
wherein the washing is performed under stirring, and the washing conditions include: stirring at a rotation speed of 600r/min for 8min;
(4) Gypsum, cellulose ether, retarder, starch ether, aluminum powder, ca (OH) in the amounts and kinds shown in Table 1 2 Mixing the straw powder I with the straw powder I to obtain the straw gypsum plaster sound insulation coating;
wherein the mixing is performed under agitation and the mixing conditions include: the stirring speed is 600r/min, and the stirring time is 8min.
And (5) recording the straw type gypsum plaster sound insulation coating obtained in the step (4) as P1.
Example 2
This example prepared a straw-based gypsum plaster sound-insulating coating using a formulation and method similar to those of example 1, except that: in step (4), step mixing was performed in accordance with the substances and the amounts added in table 1.
Wherein the straw powder obtained in the step (3) is marked as straw powder II, and the water content is 2wt per mill;
and (5) recording the straw type gypsum plaster sound insulation coating obtained in the step (4) as P2.
Example 3
This example prepared a straw-based gypsum plaster sound-insulating coating using a formulation and method similar to those of example 1, except that: the preparation conditions were varied, see in particular table 1.
Wherein the straw powder obtained in the step (3) is marked as straw powder III, and the water content is 3wt per mill;
and (5) recording the straw type gypsum plastering soundproof coating obtained in the step (4) as P3.
Comparative example 1
This comparative example prepared a straw-based gypsum plaster acoustical coating using a formulation and method similar to example 1, except that: in the step (1), the low-temperature treatment is carried out at the temperature of-15 ℃ to obtain the low-temperature straw I at the temperature of-15 ℃.
Wherein the straw powder obtained in the step (3) is marked as straw powder IV, and the water content is 2wt per mill;
and (5) recording the straw gypsum plaster sound insulation coating obtained in the step (4) as DP1.
Comparative example 2
This comparative example prepared a straw-based gypsum plaster acoustical coating using a formulation and method similar to example 1, except that: the weight ratio of the gypsum to the straw powder is 4:1.
and (5) recording the straw type gypsum plastering soundproof coating obtained in the step (4) as DP2.
Comparative example 3
The comparative example prepared a straw type gypsum plaster sound-insulating coating using a formulation and method similar to those of example 1, the main differences being: without adding aluminum powder and Ca (OH) 2 。
And (5) recording the straw type gypsum plastering soundproof coating obtained in the step (4) as DP3.
Test example 1
The straw type gypsum plaster sound-insulation coating prepared in the examples and the comparative examples is subjected to a floor slab impact improvement effect test, compressive strength and putty layer bonding strength test, and specific test results are shown in table 2.
TABLE 1
TABLE 2
The results show that the straw type gypsum plaster sound insulation coating provided by the invention has the advantages of good sound insulation effect, high adhesion, environmental protection and no toxicity.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including various technical features being combined in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. A method for preparing straw type gypsum plastering soundproof coating is characterized by comprising the following steps:
(1) Carrying out low-temperature treatment on the straw I with the average particle size of R1 to obtain low-temperature straw I with the temperature not higher than-30 ℃; wherein R1 is less than 5mm;
(2) Grinding the low-temperature straw I in the presence of a grinding medium to obtain straw II with the average particle size of R2; wherein R2 is 100-200 μm;
(3) Cleaning and drying the straw II in sequence to obtain straw powder with the water content not higher than 5 wt% per mill;
(4) Gypsum, cellulose ether, retarder, starch ether, aluminium powder and Ca (OH) 2 Mixing the straw powder with the straw powder to obtain the straw gypsum plastering soundproof coating; wherein the weight ratio of the gypsum to the straw powder is 5-10:1.
2. the method of claim 1, wherein, in step (1), the temperature of the low-temperature straw I is-60 ℃ to-30 ℃; and/or
In step (1), R1 is less than 3mm.
3. The method according to claim 1 or 2, wherein, in step (1), the time of the low-temperature treatment is 20-40h.
4. The method according to claim 1 or 2, wherein, in step (2), the R2 is 120-180 μ ι η.
5. The method according to claim 1 or 2, wherein, in step (3), the moisture content of the straw powder is less than 3wt% o; and/or
In the step (3), the washing is performed under stirring, and the washing conditions include: the stirring speed is 600-800r/min, and the stirring time is 5-10min.
6. The method of claim 1 or 2, wherein in step (4), the gypsum, cellulose ether, retarder, starch ether, aluminum powder, ca (OH) 2 The operation of mixing the straw powder comprises the following steps:
based on 1000 parts by weight of the total weight of the coating composition, 821-850 parts by weight of gypsum, 100-150 parts by weight of straw powder, 2-3 parts by weight of cellulose ether, 1-1.5 parts by weight of retarder, 0.5-1 part by weight of starch ether, 10-12 parts by weight of aluminum powder and 10-12 parts by weight of Ca (OH) 2 Performing the mixing, wherein the total weight of the coating composition is the gypsum, the cellulose ether, the retarder, the starch ether, the aluminum powder, the Ca (OH) 2 And the weight of the straw powder; and/or
In the step (4), the mixing is performed under stirring, and the conditions of the mixing include: the stirring speed is 600-1000r/min, and the stirring time is 8-12min.
7. The method according to any one of claims 1 to 6, wherein in the step (4), the average particle diameter R3 of the aluminum powder is 5 to 100 μm.
8. The method of any one of claims 1-7,
in the step (1), the straw I is at least one selected from wheat straw, corn straw, reed straw and rice straw; and/or
In the step (4), the gypsum is selected from at least one of hemihydrate gypsum and monohydrate gypsum, the cellulose ether is selected from at least one of hydroxyethyl cellulose ether and hydroxypropyl cellulose ether, and the starch ether is selected from at least one of hydroxypropyl starch ether and hydroxymethyl starch ether.
9. Straw-based gypsum plaster sound-insulating coating prepared by the method of any one of claims 1 to 8.
10. Use of the straw-based gypsum plaster acoustical coating of claim 9 in building sound insulation.
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| CN103601459A (en) * | 2013-11-18 | 2014-02-26 | 武汉理工大学 | Gypsum-based building material prepared from plant fibers for treating indoor formaldehyde and application method thereof |
| EP3031868A1 (en) * | 2014-12-12 | 2016-06-15 | Daw Se | Plaster coating substance, plaster formed from same, wall structure or structure containing this plaster, method for producing the plaster and use of the plaster for sound absorption and/or thermal insulation |
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| CN108191358A (en) * | 2018-01-28 | 2018-06-22 | 尚福平 | A kind of Novel wall body heat insulation material and preparation method thereof |
| CN109400102A (en) * | 2018-12-21 | 2019-03-01 | 山东天玉墙体工程有限公司 | A kind of plastering gupsum |
| CN115108796A (en) * | 2022-06-24 | 2022-09-27 | 厦门市好雅丽涂料有限公司 | Lightweight plastering gypsum and preparation method thereof |
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| CN103601459A (en) * | 2013-11-18 | 2014-02-26 | 武汉理工大学 | Gypsum-based building material prepared from plant fibers for treating indoor formaldehyde and application method thereof |
| EP3031868A1 (en) * | 2014-12-12 | 2016-06-15 | Daw Se | Plaster coating substance, plaster formed from same, wall structure or structure containing this plaster, method for producing the plaster and use of the plaster for sound absorption and/or thermal insulation |
| CN107344843A (en) * | 2017-07-19 | 2017-11-14 | 合肥广民建材有限公司 | A kind of ardealite base wall insulated board and its preparation technology |
| CN108191358A (en) * | 2018-01-28 | 2018-06-22 | 尚福平 | A kind of Novel wall body heat insulation material and preparation method thereof |
| CN109400102A (en) * | 2018-12-21 | 2019-03-01 | 山东天玉墙体工程有限公司 | A kind of plastering gupsum |
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