CN113121141B

CN113121141B - Manufacturing process of light sound insulation wall brick

Info

Publication number: CN113121141B
Application number: CN202110351308.0A
Authority: CN
Inventors: 兰泉喜; 刘月花; 殷宇城; 童波; 姚雯君; 蒋金陵
Original assignee: Jiangsu Saien Engineering Technology Co ltd
Current assignee: Jiangsu Saien Engineering Technology Co ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-01-21
Anticipated expiration: 2041-03-31
Also published as: CN113121141A

Abstract

The invention relates to the technical field of sound insulation wall bricks, in particular to a manufacturing process of a light sound insulation wall brick, wherein straw pulp white mud drying powder, salt mud, titanate coupling agent modified gypsum whisker, coal gangue powder and waste phosphogypsum in a paper mill are fully ground and uniformly mixed to obtain a mixed base material; adding the water repellent agent and the gas former into a proper amount of water, uniformly mixing, adding into the mixed base material after a large amount of foam is generated, sequentially adding the non-fired ceramsite and the excitant which are prepared from the galactaric acid modified fibrilia, and uniformly mixing to obtain slurry; and (4) guiding the slurry into a mold, leveling the surface, standing, and curing to obtain the light sound-insulating wall brick. The main material of the light sound-insulation wall brick is industrial and agricultural wastes, so that the economic value of the wall brick is improved, the manufacturing cost of the wall brick is reduced, an organic solvent is not needed in the preparation process, excessive energy is not needed to be consumed, the cost is low, and the light sound-insulation wall brick has excellent heat insulation, sound insulation, noise reduction and mechanical strength.

Description

Manufacturing process of light sound insulation wall brick

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of sound insulation wall bricks, in particular to a manufacturing process of a light sound insulation wall brick.

[ background of the invention ]

The light brick is widely advocated due to better practicability, lower cost and good processing and construction performance, and can effectively reduce the using amount of concrete or solid clay bricks when being used for structural components and even building outer walls, thereby reducing the cost. With the continuous improvement of living standard of people, the requirements on building materials are gradually improved, the most frequent dispute among neighborhoods is the dispute of noise pollution, and with the advance of urbanization process, the noise pollution outside the building, such as road repair, buildings, traffic flows and the like, seriously threatens the physical and mental health of human beings, so the requirement on building sound insulation is more serious.

The ceramic tile comprises a green body, a phenolic resin plate arranged in the green body and a glaze body arranged on the outer surface of the green body, wherein the green body comprises diatomite, waste ceramic plates, clay, sandstone, tourmaline powder, water and quartz, the glaze body comprises kaolin, albite powder, talcum powder, aluminum oxide, silica sol, calcium oxide, magnesium oxide, wood fiber, agate powder and the like, the ceramic tile can only be used as a ceramic tile paved in an outer space, cannot be applied as a structural material, and does not show the sound insulation effect of the ceramic tile obtained by the technical scheme. In addition, chinese patent No. CN201910323039X discloses a calcination-free sound-absorbing brick prepared by using multiple solid wastes in a synergistic manner, and a preparation method and an application thereof, wherein the calcination-free sound-absorbing brick comprises: the solid waste base cementing material consists of the following components: red mud, blast furnace slag, fly ash, desulfurized gypsum, water glass, clay, modified glass fiber, a gas former, a water repellent agent and a reinforcing agent; the aggregate is compounded by any two of steel slag, coal gangue and ceramsite; the sound absorption brick prepared by the invention has excellent noise reduction performance and good noise reduction durability, realizes the efficient comprehensive utilization of various solid wastes, however, the main raw materials of the sound absorption brick, namely the red mud and the blast furnace slag, have higher volume weight, inevitably improve the density of the sound absorption brick, and have poor heat insulation effect.

The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.

[ summary of the invention ]

In order to solve at least one technical problem mentioned in the background art, the invention aims to provide a manufacturing process of a light sound-insulating wall brick, the main material of the light sound-insulating wall brick is derived from industrial and agricultural wastes, the economic value of the light sound-insulating wall brick is improved, the manufacturing cost of the wall brick is reduced, an organic solvent is not needed in the preparation process, excessive energy is not needed to be consumed, the cost is low, and the light sound-insulating wall brick has excellent heat insulation, sound insulation, noise reduction and mechanical strength.

In order to achieve the above object, the present invention provides the following technical solutions.

An application of modified fibrilia in preparing non-sintered ceramsite.

The modified fibrilia is obtained by modifying fibrilia with galactaric acid.

The application comprises the improvement of the specific surface area of the baking-free ceramsite.

The application comprises improving the strength of the baking-free ceramsite.

The modified fibrilia is prepared by the following method: cleaning waste fibrilia, air drying, pulverizing, adding galactaric acid 3.3-3.8% of fibrilia powder in the form of solution, reflux-reacting at 86-90 deg.C for at least 4 hr, filtering, washing with hot distilled water to neutrality, and drying.

The waste hemp fiber comprises at least one of waste ramie fiber, jute fiber, ramie fiber, hemp fiber, flax fiber, apocynum venetum fiber or hibiscus hemp fiber.

Pulverizing the fibrilia to pass through at least 80 mesh sieve.

The galactaric acid is added in the form of a boiling water solution.

Stirring at 120-240r/min during the reflux reaction.

The drying is carried out at a temperature of 45-60 ℃ to constant weight.

After the galactaric acid is used for modifying the fibrilia, the originally smooth and regular surface structure of the fibrilia becomes rough, loose and porous, the specific surface area of the non-sintered ceramsite prepared by using the galactaric acid as a raw material can be obviously improved, and the strength of the non-sintered ceramsite can be obviously improved by introducing more polar group hydroxyl groups, so that the galactaric acid is favorably used as aggregate to be applied to the light sound-insulating wall brick.

The specific method for preparing the baking-free ceramsite comprises the following steps: drying and crushing straw pulp white mud of a paper mill, sieving the straw pulp white mud with a 60-mesh sieve, adding fly ash, modified fibrilia and an excitant solution, stirring the mixture for at least 0.5h by using a planetary stirrer, aging the mixture for at least 3h, adding cement, uniformly mixing the mixture, granulating and maintaining the mixture to obtain the straw pulp white mud.

The content of the straw pulp white mud dry powder in the paper mill is 35-40% by weight, the content of the fly ash is 25-30% by weight, the content of the modified fibrilia is 10-25% by weight, and the balance is cement.

The exciting agent is sodium silicate, and the addition amount of the exciting agent is 1-4% of the total mass of the straw pulp white mud dry powder, the fly ash, the modified fibrilia and the cement in the paper mill.

The stirring speed of the planetary stirrer is 180-240 r/min.

The granulated particles have a particle size of 5 to 8 mm.

Curing at 20 + -2 deg.C and 60 + -2% relative humidity for at least 21 days.

In the method, the non-fired ceramsite is prepared by utilizing the straw pulp white mud, the fly ash, the modified waste fibrilia and the cement of the waste paper mill, and the main raw materials are all recycled from the waste, so the preparation cost is low, and the waste does not need to be additionally treated; the utilization of the fly ash and the waste fibrilia is beneficial to reducing the bulk density of the non-sintered ceramsite, and the density of the non-sintered ceramsite is not higher than 850kg/cm³And the galactaric acid is used for modifying the fibrilia and then preparing the ceramsite with a proper content, so that the baking-free ceramsite has excellent specific surface area and stacking strength and low water absorption, and is suitable for preparing the light sound-insulation wall brick by using the ceramsite as aggregate.

The baking-free ceramsite is applied to preparation of the light sound-insulation wall brick.

The application comprises the step of applying the baking-free ceramsite as aggregate to the preparation of the light sound-insulation wall brick.

A light sound-insulating wall brick comprises gel base material and aggregate in a weight ratio of 4.5-6.0: 1.

The aggregate is the baking-free ceramsite. The wall brick is prepared by taking the baking-free ceramsite as the aggregate, the material of the baking-free ceramsite is close to that of the wall brick, the probability of gaps appearing in a brick body due to the reasons of inconsistent expansion coefficients, uneven stress distribution and the like is greatly reduced, higher strength is provided for the wall brick, more pores are provided for the internal components of the baking-free ceramsite, and the baking-free ceramsite is taken as a complete structure, so that sound waves transmitted to the inside of the ceramsite can be gradually consumed, and the sound insulation effect of the wall brick is remarkably improved.

The gel base comprises: the paper mill straw pulp white mud baking powder, salt mud, modified gypsum whiskers, coal gangue powder, waste phosphogypsum, an exciting agent, a water repellent agent and a gas former.

The gel base material comprises the following components in parts by weight: 35-50 parts of straw pulp white mud drying powder, 30-40 parts of salt mud, 15-20 parts of modified gypsum whiskers, 10-15 parts of coal gangue powder, 5-10 parts of waste phosphogypsum, 1-2 parts of an exciting agent, 1-2 parts of a water repellent agent and 1-2 parts of an air forming agent.

The activator is a mixture of sodium silicate and either sodium hydroxide or potassium hydroxide.

The water repellent agent is at least one of melamine, formaldehyde resin or polyamide polyurea.

The gas former is at least one of aluminum powder, zinc powder or calcium carbide.

The modified gypsum whisker is prepared by modifying a gypsum whisker prepared by a waste phosphogypsum hydrothermal method by using a titanate coupling agent.

The preparation method of the modified gypsum whisker comprises the following steps:

-preparing gypsum whiskers: washing waste phosphogypsum with water to remove impurities, uniformly mixing the waste phosphogypsum with water according to the material-liquid ratio of 1:8-10, carrying out hydrothermal reaction for at least 3h under high pressure, and carrying out vacuum filtration and low-temperature drying to obtain gypsum whiskers;

-modification: uniformly mixing the gypsum whisker and the titanate coupling agent according to the weight ratio of 96:4-97:3, heating to 125-.

The washing and impurity removal of the waste phosphogypsum are specifically as follows: removing impurities from the waste phosphogypsum, crushing to be sieved by a sieve of 100 meshes, adding water with the weight of 4-5 times, stirring for 10min at 300r/min, standing for 30min, taking out floating impurities on the upper layer, repeating the operation for at least 3 times, and drying the phosphogypsum in an oven at 50-60 ℃ for at least 12 h.

The pressure of the hydrothermal reaction is not lower than 0.2MPa, and the reaction temperature is 130-145 ℃.

The low-temperature drying is drying at 40-55 deg.C for 6-12 h.

The titanate coupling agent is isopropyl triisostearoyl titanate.

The stirring speed of the high-speed mixing modification is 600-1200 r/min.

The method takes waste phosphogypsum as a raw material, prepares gypsum whiskers by a hydrothermal method, then directly reacts with a titanate coupling agent to obtain modified gypsum whiskers, adds the modified gypsum whiskers to a gel base material and prepares the light sound-insulation wall brick, the modified gypsum whiskers can effectively reduce the density of the wall brick, the titanate coupling agent and the gypsum whiskers are chemically bonded, and long-chain alkyl groups are grafted on the surface of the gypsum whiskers, so that the hydrophilicity of the gypsum whiskers is reduced, the hydrophobicity of the gypsum whiskers is improved, the agglomeration of the gypsum whiskers is effectively prevented, the gypsum whiskers are favorably and uniformly dispersed in a system, and the gypsum whiskers play a remarkable role in reinforcing other materials of the wall brick, so that the method has important significance for improving the compressive strength of the wall brick; in addition, the surface of the gypsum whisker is rough due to grafting modification, a large amount of pore spaces are generated, and due to the uniform distribution of the modified gypsum whisker in the material, heat cannot be rapidly conducted possibly because the pore spaces cannot be connected with each other, the heat conductivity coefficient of the wall brick is low, and the obvious heat insulation effect can be achieved; the even distribution of pore space also makes the sound wave produce resonance with the air in the pore space when propagating in the wall brick to play obvious consumption effect to its intensity, exert better syllable-dividing efficiency.

The preparation method of the light sound insulation wall brick comprises the following steps:

s1, fully grinding straw pulp white mud drying powder, salt mud, modified gypsum whiskers, coal gangue powder and waste phosphogypsum of a paper mill, and uniformly mixing to obtain a mixed base material;

s2, adding the water repellent agent and the gas former into a proper amount of water, uniformly mixing, adding into the mixed base material after a large amount of foam is generated, sequentially adding the aggregate and the activator, and uniformly mixing to obtain slurry;

and S3, introducing the slurry into a mold, leveling the surface, standing, and curing to obtain the lightweight sound-insulating wall brick.

Fully grinding until the mixture passes through at least 60 meshes of sieve.

The curing is divided into three stages:

curing at 60-65 deg.C under normal pressure for at least 9 h;

curing at 150 ℃ and 1.2-1.4MPa for at least 12h at 130-;

curing for 12h at 20-25 ℃ and relative humidity of 80%.

The aggregate comprises the baking-free ceramsite based on the modified fibrilia.

In the gel base material of the light sound-proof brick, the straw pulp white mud drying powder, the salt mud, the coal gangue powder and the waste phosphogypsum of a paper mill are all from industrial waste, the modified gypsum whisker is prepared and modified from the waste phosphogypsum, and the straw pulp white mud, the coal ash and the modified fibrilia of the paper mill which are main materials in the aggregate are also from industrial and agricultural waste, so that the method reasonably utilizes a plurality of industrial and agricultural waste materials, not only reduces the treatment cost, but also obviously improves and promotes the residual economic value of the industrial and agricultural waste materials, and realizes comprehensive utilization. The light sound-proof brick has the advantages that organic solvent is not needed in the baking-free preparation process, excessive energy consumption is not needed, the cost is low, the strong basicity of straw pulp white mud and salt mud in a paper mill is fully utilized, the better excitation effect and the better gel activity are obtained, the prepared light sound-proof brick has excellent heat insulation, sound insulation, noise reduction and mechanical strength, and can be widely applied to building external walls, structural main materials, roadbed laying, bridge engineering and the like.

The above-described preferred conditions may be combined with each other to obtain a specific embodiment, in accordance with common knowledge in the art.

The raw materials or reagents involved in the invention are all common commercial products, and the operations involved are all routine operations in the field unless otherwise specified.

The invention has the beneficial effects that:

1) after the galactaric acid is used for modifying the fibrilia, the originally smooth and regular surface structure of the fibrilia becomes rough, loose and porous, the specific surface area of the non-sintered ceramsite prepared by using the galactaric acid as a raw material can be obviously improved, the strength of the non-sintered ceramsite can be obviously improved by introducing more polar group hydroxyl, the non-sintered ceramsite is endowed with more excellent specific surface area and stacking strength, and the water absorption rate is low;

2) the wall brick is prepared by taking the baking-free ceramsite as the aggregate, the material of the baking-free ceramsite is close to that of the wall brick, the probability of gaps in a brick body caused by inconsistent expansion coefficients, uneven stress distribution and the like is greatly reduced, higher strength is provided for the wall brick, more pores are provided for the internal components of the baking-free ceramsite, and the baking-free ceramsite is used as a complete structure, so that the sound waves transmitted to the inside of the ceramsite can be gradually consumed, and the sound insulation effect of the wall brick is obviously improved;

3) the waste phosphogypsum is used as a raw material to prepare gypsum whiskers, then the gypsum whiskers directly react with a titanate coupling agent to obtain modified gypsum whiskers, and the modified gypsum whiskers are added into a gel base material to prepare the light sound-insulation wall brick, so that the density of the wall brick can be effectively reduced, the modified gypsum whiskers are uniformly dispersed in a system, a reinforcing effect is realized on other materials of the wall brick, and the compressive strength of the wall brick is remarkably improved;

4) the surface of the gypsum whisker is rough due to grafting modification, a large amount of pore spaces are generated, and due to the uniform distribution of the modified gypsum whisker in the material, heat cannot be rapidly conducted possibly because the pore spaces cannot be connected with each other, the heat conductivity coefficient of the wall brick is low, and the obvious heat insulation effect can be achieved; the even distribution of the pore space also enables the sound wave to generate resonance with the air in the pore space when being transmitted in the wall brick, thereby playing a remarkable consumption role on the strength of the wall brick and playing a better sound insulation effect;

5) the main materials of the gel base material and the aggregate of the light sound-proof brick are all from industrial and agricultural wastes, and the method reasonably utilizes a plurality of wastes, thereby not only reducing the treatment cost, but also obviously improving and promoting the residual economic value and realizing comprehensive utilization; the light sound-proof brick is free from organic solvent in the baking-free preparation process, excessive energy consumption and low in cost, the strong basicity of straw pulp white mud and salt mud of a paper mill is fully utilized, a good excitation effect and gel activity are obtained, and the prepared light sound-proof brick has excellent heat insulation, sound insulation, noise reduction and mechanical strength.

The invention adopts the technical scheme for achieving the purpose, makes up the defects of the prior art, and has reasonable design and convenient operation.

[ description of the drawings ]

The foregoing and/or other objects, features, advantages and embodiments of the invention will be more readily understood from the following description taken in conjunction with the accompanying drawings in which:

FIG. 1 is an FTIR spectrum of ramie fibers of the present invention before and after modification;

FIG. 2 is a schematic view showing the thermal conductivity of the lightweight soundproof wall tile according to the present invention;

fig. 3 is a schematic view of the sound insulation amount of the lightweight soundproof wall tile according to the present invention.

[ detailed description ] embodiments

Unless otherwise specified, such as "mol%" means mole percent, "vol%" means volume percent, all percentages, parts, ratios, etc. herein are by weight.

The straw pulp white mud of the paper mill is a large amount of causticized white mud produced by paper making enterprises using non-wood fibers as raw materials in an alkali recovery process, and is difficult to recycle on one hand, and can cause serious environmental pollution when filling pits for paving or discharging into rivers on the other hand. The main chemical components of the paper mill straw pulp white mud used in the examples of the present application are shown in table 1, and the straw pulp white mud that can be used in the technical solution of the present application is not limited to the components listed in table 1.

TABLE 1 Main chemical composition of straw pulp lime mud of paper mill

Composition (I)

Water content

SiO₂

Al₂O₃

Fe₂O₃

CaO

MgO

K₂O

Others

Content (wt.)

36.86％

10.76％

1.45％

0.18％

46.26％

0.58％

1.15％

Balance of

The salt mud is discharged in the process of preparing chlorine, hydrogen, alkali and the like by using common salt as a main raw material through an electrolysis method, and is directly buried after barium sulfate is extracted in a general treatment mode, so that the method is unfavorable for the environment. The main chemical components of the salt slurry applied in the embodiment of the present application are shown in table 2, and the salt slurry applicable to the technical solution of the present application is not limited to the salt slurry listed in table 2.

TABLE 2 main chemical composition of salty mud

Composition (I)

Water content

SiO₂

CaCO₃

MgCO₃

Mg(OH)

NaCl

Na₂SO₄

Others

Content (wt.)

30.27％

4.86％

17.92％

5.26％

11.32％

23.55％

3.50％

Balance of

The present invention is described in detail below.

Example 1: a baking-free ceramsite:

the embodiment provides a non-sintered ceramsite, which specifically comprises the following steps:

1) preparing a boiling water solution containing 1% galactaric acid, cleaning waste ramie fibers, drying in the air, crushing to pass through a 80-mesh sieve, adding 35g galactaric acid solution into 10g ramie fiber powder, refluxing and reacting at 90 ℃ for 4h at 180r/min, filtering, washing with hot distilled water to be neutral, and drying at 50 ℃ to constant weight to obtain modified ramie fibers, wherein FTIR (Fourier transform infrared spectroscopy) is shown in figure 1, and the FTIR is 3376cm^-1The vicinity is a-OH characteristic peak in ramie, 2930cm^-1Nearby is-CH in ramie₂、-CH₃Characteristic peak at 1739cm^-1Around the peak is a characteristic peak of-C ═ O, 1050cm^-1The vicinity is a-C-O characteristic peak which is weakened to different degrees after modification; in the following figures, 2978-2992cm^-1、2864cm^-1Near is a-CH characteristic peak, 1715cm^-1In the vicinity of the molecular weight distribution, the characteristic peak of-COOH, 1396cm^-1、1350cm^-1Near the characteristic peak of-OH, 1192cm^-1Nearby is a characteristic peak of-C-C, 1161cm^-1、1100cm^-1、1025cm^-1The vicinity is a characteristic peak of-C-O, and the newly appeared characteristic peak indicates that the galactaric acid has successfully reacted with the ramie fibers;

2) drying and crushing straw pulp white mud of a paper mill, sieving the straw pulp white mud with a 60-mesh sieve, adding 30 parts by weight of fly ash, 15 parts by weight of modified fibrilia obtained in the step 1) and 30 parts by weight of 5% sodium silicate solution into 35 parts by weight of white mud dry powder, stirring the mixture for 0.5h and aging the mixture for 3h by using a planetary stirrer at a speed of 240r/min, adding 20 parts by weight of cement, uniformly mixing the mixture, granulating the mixture until the particle size is 5mm, and maintaining the mixture for 21d under the conditions that the temperature is 20 +/-2 ℃ and the relative humidity is 60 +/-2%.

Example 2: a baking-free ceramsite:

1) preparing a boiling water solution containing 1% galactaric acid, cleaning waste flax fibers, airing and crushing the waste flax fibers, sieving the waste flax fibers with a 80-mesh sieve, adding 36g galactaric acid solution into 10g flax fiber powder, carrying out reflux reaction at 88 ℃ for 5 hours at 180r/min, washing the flax fibers to be neutral by hot distilled water after filtering, and drying the flax fibers to constant weight at 55 ℃ to obtain modified fibrilia;

2) drying and crushing straw pulp white mud of a paper mill, sieving the straw pulp white mud with a 60-mesh sieve, adding 28 parts by weight of fly ash, 16 parts by weight of modified fibrilia obtained in the step 1) and 25 parts by weight of 6% sodium silicate solution into 36 parts by weight of white mud dry powder, stirring the mixture for 1 hour and aging the mixture for 3 hours by using a planetary stirrer at 180r/min, adding 20 parts by weight of cement, uniformly mixing the mixture, granulating the mixture until the particle size is 5mm, and maintaining the mixture for 21 days under the conditions that the temperature is 20 +/-2 ℃ and the relative humidity is 60 +/-2%.

Example 3: a baking-free ceramsite:

1) preparing modified fibrilia: preparing a solution containing 1% acetic acid, cleaning waste ramie fibers, airing, crushing to 80-mesh sieve, adding 35g of acetic acid solution into 10g of ramie fiber powder, refluxing and reacting at 90 ℃ for 4 hours at 180r/min, filtering, washing with hot distilled water to be neutral, and drying at 50 ℃ to constant weight;

2) same as step 2 of example 1).

Example 4: a baking-free ceramsite:

the embodiment provides a non-sintered ceramsite, which specifically comprises the following steps: drying and crushing straw pulp white mud in a paper mill, sieving the straw pulp white mud with a 60-mesh sieve, cleaning waste ramie fibers, drying the cleaned waste ramie fibers, crushing the cleaned waste ramie fibers, sieving the dried grass pulp white mud with a 80-mesh sieve, adding 30 parts by weight of fly ash, 15 parts by weight of ramie fiber powder and 30 parts by weight of 5% sodium silicate solution into 35 parts by weight of white mud dry powder, stirring the mixture for 0.5h at a speed of 240r/min by using a planetary stirrer, aging the mixture for 3h, adding 20 parts by weight of cement, uniformly mixing the mixture, granulating the mixture until the particle size is 5mm, and maintaining the mixture for 21d under the conditions that the temperature is 20 +/-2 ℃ and the relative humidity is 60 +/-2%.

Test example 1:

the ceramsite obtained in the different embodiments of examples 1-4 was tested for specific surface area, strength and bulk density, and the test results are shown in Table 3.

TABLE 3 ceramsite Properties

Performance of	Specific surface area (m)²/g)	Barrel pressure intensity (MPa)	Bulk Density (kg/m)³)	Water absorption (%)
					Example 1	14.8	6.7	835.8	7.7
Example 2	14.3	6.5	842.6	7.5
					Example 3	10.5	4.9	935.3	9.3
Example 4	8.2	4.2	1005.4	9.1

As can be seen from the above table 3, in the examples 1 and 2 of the present application, the unfired ceramsite is prepared by modifying the waste ramie fibers and the flax fibers, and the ceramsite has high specific surface area and cylinder compression strength, and the bulk density of the ceramsite is not more than 850kg/m³And the water absorption rate is low, and the measured performance meets the specification of GB/T17431.1-2010 lightweight aggregate performance standard, so that the light sound-insulating wall brick is suitable to be prepared by using the aggregate as the aggregate. It can also be seen from table 3 that the significant modification of fibrilia by acetic acid can not be achieved, the specific surface area and the barrel pressure strength of the obtained ceramsite are not significantly improved, and the performance of the ceramsite prepared by directly using fibrilia can not be improved.

Example 5: a modified gypsum whisker:

the embodiment provides a modified gypsum whisker, which specifically comprises the following steps:

1) removing impurities from waste phosphogypsum, crushing to be sieved by a sieve of 100 meshes, adding water with 5 times of weight, stirring for 10min at 240r/min, standing for 30min, taking out floating impurities on the upper layer, repeating the operation for 3 times, and drying the phosphogypsum in an oven at 50 ℃ for 12 h;

2) uniformly mixing the phosphogypsum obtained in the step 1) with water according to the feed-liquid ratio of 1:10, carrying out high-pressure hydrothermal reaction for 4h under the conditions of 0.2MPa of pressure and 135 ℃, carrying out vacuum filtration, and drying for 6h at the low temperature of 55 ℃ to obtain gypsum whiskers;

3) uniformly mixing the gypsum whisker and triisostearoyl isopropyl titanate according to the weight ratio of 96:4, heating to 125 ℃, and stirring at a high speed of 900r/min for mixing and modifying for 60min to obtain the modified gypsum whisker.

Example 6: a gypsum whisker:

the embodiment provides a gypsum whisker, which specifically comprises the following steps:

1) removing impurities from waste phosphogypsum, crushing to be sieved by a sieve of 100 meshes, adding water with 5 times of weight, stirring for 10min at 300r/min, standing for 30min, taking out floating impurities on the upper layer, repeating the operation for 4 times, and drying the phosphogypsum in an oven at 50 ℃ for 12 h;

2) uniformly mixing the phosphogypsum obtained in the step 1) with water according to the feed-liquid ratio of 1:9, carrying out high-pressure hydrothermal reaction for 4h under the conditions of 0.2MPa of pressure and 140 ℃, carrying out vacuum filtration, and drying for 8h at the low temperature of 45 ℃ to obtain the gypsum whisker.

Example 7: a light sound insulation wall brick:

the embodiment provides a light sound insulation wall brick, which comprises the following steps:

s1, 395g of straw pulp white mud drying powder of a paper mill, 326g of salt mud, 152g of modified gypsum whisker obtained in example 5, 115g of coal gangue powder and 66g of waste phosphogypsum are fully ground to pass through a 60-mesh sieve, and mixed uniformly to obtain a mixed base material;

s2, 12g of water repellent agent melamine and 12g of gas forming agent aluminum powder are added into 350g of water to be mixed uniformly, a large amount of foam is generated and then added into a mixed base material to be mixed uniformly, 218.8g of ceramsite obtained in example 1 and 16g of excitant (8 g of sodium silicate and 8g of sodium hydroxide) are sequentially added and mixed uniformly to obtain slurry;

and S3, introducing the slurry into a mold, leveling the surface, standing, curing at 65 ℃ and normal pressure for 12h, curing at 145 ℃ and 1.4MPa for 12h, and curing at 24 ℃ and relative humidity of 80% for 12h to obtain the lightweight soundproof wall brick.

Example 8: a light sound insulation wall brick:

s1, fully grinding 400g of straw pulp white mud drying powder, 330g of salt mud, 160g of modified gypsum whisker obtained in example 5, 120g of coal gangue powder and 75g of waste phosphogypsum to pass through a 60-mesh sieve, and uniformly mixing to obtain a mixed base material;

s2, 13g of water repellent agent melamine and 12g of gas former zinc powder are added into 360g of water to be mixed uniformly, a large amount of foam is generated and then added into a mixed base material, 204.5g of ceramsite obtained in example 2 and 15g of excitant (8 g of sodium silicate and 7g of potassium hydroxide) are sequentially added and mixed uniformly to obtain slurry;

and S3, introducing the slurry into a mold, leveling the surface, standing, curing at 60 ℃ and normal pressure for 18h, curing at 150 ℃ and 1.3MPa for 12h, and curing at 25 ℃ and relative humidity of 80% for 12h to obtain the lightweight soundproof wall brick.

Example 9: a light sound insulation wall brick:

s1, same as step S1 of example 8;

s2, 13g of water repellent agent melamine and 12g of gas former zinc powder are added into 360g of water to be mixed uniformly, a large amount of foam is generated and then added into a mixed base material, 204.5g of ceramsite obtained in example 3 and 15g of excitant (8 g of sodium silicate and 7g of potassium hydroxide) are sequentially added and mixed uniformly to obtain slurry;

s3, same as step S3 of example 8.

Example 10: a light sound insulation wall brick:

s1, same as step S1 of example 8;

s2, 13g of water repellent agent melamine and 12g of gas former zinc powder are added into 360g of water to be mixed uniformly, a large amount of foam is generated and then added into a mixed base material, 204.5g of ceramsite obtained in example 4 and 15g of excitant (8 g of sodium silicate and 7g of potassium hydroxide) are sequentially added and mixed uniformly to obtain slurry;

s3, same as step S3 of example 8.

Example 11: a light sound insulation wall brick:

s1, fully grinding 400g of straw pulp white mud drying powder, 330g of salt mud, 160g of modified gypsum whisker obtained in example 6, 120g of coal gangue powder and 75g of waste phosphogypsum to pass through a 60-mesh sieve, and uniformly mixing to obtain a mixed base material;

s2, 13g of water repellent agent melamine and 12g of gas former zinc powder are added into 360g of water to be mixed uniformly, a large amount of foam is generated and then added into a mixed base material, 204.5g of ceramsite obtained in example 1 and 15g of excitant (8 g of sodium silicate and 7g of potassium hydroxide) are sequentially added and mixed uniformly to obtain slurry;

s3, same as step S3 of example 8.

Example 12: a light sound insulation wall brick:

s2, same as step S2 of example 8;

s3, same as step S3 of example 8.

Example 13: a light sound insulation wall brick:

s1, same as step S1 of example 8;

s2, 13g of water repellent melamine and 12g of zinc powder as a gas former are added into 360g of water to be mixed uniformly, a large amount of foam is generated and then added into a mixed base material, 204.5g of commercially available ceramsite (purchased from Muyang building materials sales Limited company, with the particle size of 5-10mm) and 15g of excitant (sodium silicate 8g and potassium hydroxide 7g) are sequentially added and mixed uniformly to obtain slurry;

Example 14: a light sound insulation wall brick:

s2, 13g of water repellent agent melamine and 12g of gas former zinc powder are added into 360g of water to be mixed uniformly, a large amount of foam is generated and then added into a mixed base material, 204.5g of steel slag (with the particle size of 1-5mm) and 15g of excitant (8 g of sodium silicate and 7g of potassium hydroxide) are sequentially added into the mixed base material, and the mixture is mixed uniformly to obtain slurry;

Test example 2:

the lightweight soundproof wall bricks obtained in the different embodiments of examples 7 to 14 were used as test samples, the volume density test was performed according to the relevant regulations of GB/T3994-2013 clayey heat insulating refractory bricks, the compressive strength test was performed according to the relevant regulations of GB 50003-2011-masonry structure design specifications, and the test results are shown in Table 4.

TABLE 4 Properties of lightweight soundproof wall brick

Sample (I)	Bulk density (kg/m)³)	Compressive strength (MPa)
			Example 7	948.5	15.6
Example 8	942.6	16.1
			Example 9	986.1	14.3
Example 10	1012.4	13.8
			Example 11	960.3	13.6
Example 12	966.1	13.2
			Example 13	905.0	8.8
Example 14	1026.2	14.7

From the comprehensive data in table 4, it can be seen that, compared with the galactaric acid modification, the ceramsite prepared by modifying the fibrilia without the fibrilia or with the acetic acid as the aggregate is not helpful to reduce the volume density of the wall brick, and can also weaken the compressive strength of the wall brick; the gypsum whisker is obviously not beneficial to reducing the volume density and improving the strength without being used as a gel base material to prepare the wall brick; in addition, the light commercial ceramsite can reduce the density of the wall brick but obviously weaken the strength of the wall brick, and the steel slag is used as the aggregate, so that the density of the wall brick is obviously improved, and the wall brick is not easy to construct; the galactaric acid is used for modifying fibrilia to prepare ceramsite, the ceramsite is used as aggregate, and the gypsum whisker directly reacts with the titanate coupling agent to obtain modified gypsum whisker which is used as a gel base material for reinforcing other materials, so that the volume density of the wall brick can be reduced, and the compressive strength of the wall brick can be improved.

Test example 3:

the test results of the thermal conductivity (at a temperature of 350 + -25 ℃) of the lightweight soundproof wall bricks obtained in each of examples 7 to 14 according to the regulations of GB/T3994-2013 for the clay-based insulating firebricks were shown in FIG. 2. As can be seen from the graph of FIG. 2, the lightweight soundproof wall tiles obtained by the technical scheme of the application all have the thermal conductivity coefficient not higher than 0.15W/m.K, so that the lightweight soundproof wall tiles can exert excellent heat insulation and heat preservation effects; it is also known from the graph of fig. 2 that the gypsum whisker not modified by the titanate coupling agent is not beneficial to reducing the thermal conductivity of the wall brick, and the commercially available ceramsite or steel slag is not beneficial to reducing the thermal conductivity when being used as the aggregate, and the commercially available ceramsite or steel slag may have a different thermal expansion coefficient from the gel base material, so that cracks occur between the aggregate and the gel base material, and heat is easily dissipated in the cracks, so that the thermal conductivity is obviously improved, and the heat insulation and warm keeping effects cannot be achieved.

Test example 4: the sound insulation performance test was carried out by using the lightweight sound insulation wall bricks obtained in the different embodiments of examples 7 to 14 as test samples (thickness: 20cm), and the results are shown in FIG. 3. As can be seen from the graph of fig. 3, the lightweight acoustical tiles obtained in examples 7 and 8 each have a sound insulation amount of not less than 50dB, and exert excellent sound insulation efficacy; compared with the prior art, the galactose diacid is used for modifying the fibrilia to prepare the ceramsite and is used as the aggregate, and the titanate coupling agent modified gypsum whisker is used as the gel material, so that the soundproof effect of the lightweight soundproof brick is remarkably improved.

The operations and materials not disclosed in the present invention are well known to those skilled in the art.

Claims

1. The application of the modified fibrilia in preparing the non-sintered ceramsite is characterized in that:

the modified fibrilia is obtained by modifying fibrilia with galactaric acid, and specifically comprises the following steps:

cleaning waste fibrilia, air drying, pulverizing, adding galactaric acid 3.3-3.8% of fibrilia powder in the form of solution, reflux-reacting at 86-90 deg.C for at least 4 hr, filtering, washing with hot distilled water to neutrality, and drying.

2. Use according to claim 1, characterized in that:

the application comprises the steps of improving the specific surface area of the baking-free ceramsite; and/or

The application comprises improving the strength of the baking-free ceramsite.

3. Use according to claim 1 or 2, characterized in that: the method for preparing the baking-free ceramsite comprises the following steps: drying and crushing straw pulp white mud of a paper mill, sieving the straw pulp white mud with a 60-mesh sieve, adding fly ash, modified fibrilia and an excitant solution, stirring the mixture for at least 0.5h by using a planetary stirrer, aging the mixture for at least 3h, adding cement, uniformly mixing the mixture, granulating and maintaining the mixture to obtain the straw pulp white mud.

4. The use of the non-sintered ceramsite in any one of claims 1-3 for preparing lightweight sound-insulating wall bricks, characterized in that: the application comprises the step of applying the baking-free ceramsite as aggregate to the preparation of the light sound-insulation wall brick.

5. A light sound insulation wall brick which is characterized in that:

comprises gel base material and aggregate with the weight ratio of 4.5-6.0: 1;

the gel base material comprises paper mill straw pulp white mud drying powder, salt mud, modified gypsum whiskers, coal gangue powder, waste phosphogypsum, an exciting agent, a water repellent agent and a gas former;

the aggregate comprises the baking-free ceramsite used in any one of claims 1 to 3.

6. The lightweight acoustical wall tile of claim 5, wherein: the modified gypsum whisker is prepared by modifying a gypsum whisker prepared by a waste phosphogypsum hydrothermal method by using a titanate coupling agent.

7. The lightweight soundproof wall tile according to claim 5 or 6, wherein: the preparation method of the modified gypsum whisker comprises the following steps:

-preparing gypsum whiskers: washing waste phosphogypsum with water to remove impurities, uniformly mixing the waste phosphogypsum with water according to the material-liquid ratio of 1:8-10, carrying out hydrothermal reaction for at least 3h under the high pressure of not less than 0.2MPa, carrying out vacuum filtration, and drying at the low temperature of 40-55 ℃ to obtain gypsum whiskers;

8. A method for manufacturing a lightweight soundproof wall block according to any one of claims 5 to 7, comprising: