CN108640653A - A technique for preparing heat-insulation wall plate lightweight aggregate using stalk and magnesia oxychloride cement - Google Patents

A technique for preparing heat-insulation wall plate lightweight aggregate using stalk and magnesia oxychloride cement Download PDF

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Publication number
CN108640653A
CN108640653A CN201810459757.5A CN201810459757A CN108640653A CN 108640653 A CN108640653 A CN 108640653A CN 201810459757 A CN201810459757 A CN 201810459757A CN 108640653 A CN108640653 A CN 108640653A
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CN
China
Prior art keywords
stalk
magnesia oxychloride
oxychloride cement
lightweight aggregate
straw base
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Withdrawn
Application number
CN201810459757.5A
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Chinese (zh)
Inventor
张文华
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Nanjing Forestry University
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Nanjing Forestry University
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Priority to CN201810459757.5A priority Critical patent/CN108640653A/en
Publication of CN108640653A publication Critical patent/CN108640653A/en
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/027—Lightweight materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
    • C04B41/509—Magnesium cements, e.g. Sorel cement
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

Abstract

The present invention relates to a kind of technologies preparing heat-insulation wall plate lightweight aggregate using stalk and magnesia oxychloride cement, including five steps：The first step：Stalk ball particle is pressed into after stalk is mixed in proportion with agglutinant；Second step：Stalk ball is put into vacuum drying oven and sinters the wooden ceramic spherical particle of straw base into；Third walks：Particle surface is sprayed on after surfactant is mixed with water tentatively to be moistened；4th step：Particle after moistening is stirred in blender and sprays magnesia oxychloride cement slurry to fully wrapped around rear discharging；5th step：It conserves at ambient temperature 6 hours after condensing hardening completely to magnesia oxychloride cement, heat-insulation wall plate high-strength light straw base wood ceramics lightweight aggregate is made.Stalk used in the present invention is biomass recyclable materials, change the present situation that conventional vacuum lightweight aggregate raw material are non-renewable, big to carrying capacity of environment, straw base wood ceramics lightweight aggregate prepared by the present invention, have the advantages that lightweight, high-strength, good heat insulating, is the building thermal-insulation energy-saving new material of green.

Description

A technique for preparing heat-insulation wall plate lightweight aggregate using stalk and magnesia oxychloride cement
Technical field
The invention belongs to building material technical fields, and in particular to a kind of to prepare insulated wall using stalk and magnesia oxychloride cement The technology of plate lightweight aggregate is mainly used for the assembled architectures heat-insulation wall plate such as residential houses, office building.
Background technology
China is energy-consuming big country, and China's whole year energy consumption has occupied second place of the world, has been only second to the U.S..Building energy consumption Account for about the one third of social total energy consumption, it is contemplated that account for upper length to the year two thousand thirty and be raised to 40%.More stern reality is that China is existing Building is mostly high energy consumption building, and the unit area energy consumption developed country more close than weather conditions is higher by 2~5 times.Therefore, it improves The thermal and insulating performance of building significantly reduces building energy consumption, extremely urgent.It can in the heat loss constitution system of traditional architecture To find, the selection of construction material has particularly important influence for energy consumption height.
Lightweight aggregate plays an important roll building energy conservation as important construction material.Existing lightweight aggregate is divided into naturally Lightweight aggregate and artificial lightweight aggregate two major classes, natural weight aggregate have float stone, scoria etc., artificial lightweight aggregate to have haydites of book structure, clay Haydite, expanded perlite, polystyrene foam (EPS) etc..However, the raw material of existing heat-insulation wall plate lightweight aggregate belong to Non-renewable resources, excessively pick take and develop and use, and will bring the exhaustion of resource and the negative effect to ball ecological environment, The theory of sustainable development is not met.
On the other hand, China generates about 900,000,000 tons of stalk every year, wherein based on corn, wheat and paddy stalk, accounts for total The 80% of stalk yield.Annual stalk is for making fertilizer, mechanical returning to the field and accounting for total straw as feed, the raw material of industry and plantation base-material etc. The 45.7% of stalk yield, remaining is 54.3% for fuel or being discarded, and the stalk amount for being wherein used for fuel will be reduced year by year, and Discarded amount increases year by year.In recent years, answering with country labor force transfer, energy consumption structure adjustment and all kinds of alternative materials With in addition stalk comprehensive utilization high expensive, the reasons such as less economical, industrialization level is low, start provincialism, season occurred Property, structural stalk it is superfluous.Especially in major grain producing area and coastal economy developed regions, phenomenon is burned in violation of rules and regulations and is prohibited repeatly not Only, crop straw burning not only waste of resource, pollution environment, also seriously threatens traffic safety, how to dispose a large amount of remaining straw Stalk becomes one and is badly in need of the significant problem solved.
Therefore, using in agricultural production process a large amount of recyclable regeneratives stalk, prepare heat-insulation wall plate lightweight, height By force, the straw base wood ceramics lightweight aggregate grain of excellent thermal insulation performance, be one it is environmentally protective, to building heat preservation industry tool want important The Sustainable Development Road of meaning.
Invention content
The present invention is directed to the deficiency of existing heat preserving aggregate, is to provide and a kind of preparing heat-insulation wall plate lightweight aggregate using stalk Technology, the technology be using in agricultural production process stalk, prepare building heat preservation wallboard lightweight aggregate particle, stalk category In renewable resource, meet the theory of sustainable development.In addition, the straw base wood ceramics lightweight aggregate prepared by the present invention, tool There is the characteristics of lightweight, high-strength, heat preservation, sound insulation, while there is good adhesive property with cement-based material, dress can be significantly improved Intensity with formula heat-insulation wall plate, suitable for requiring the buildings such as high house, office building heat preservation, heat-insulated, sound insulation.
The specific technical solution of the present invention is as follows：
A technique for heat-insulation wall plate lightweight aggregate being prepared using stalk and magnesia oxychloride cement, the technology is in processing procedure In five steps：
The first step：The stalk that grinding screen is chosen is mixed in proportion with agglutinant, is pressed into the stalk of 4~18mm of diameter Ball；
Second step：Stalk ball is put into vacuum drying oven to be sintered, sinters the wooden ceramic spherical particle of straw base into；
Third walks：The mixture of surfactant and water is sprayed on the wooden ceramic spherical particle surface of straw base, makes straw Stalk sill matter ceramic spherical particle tentatively moistens；
4th step：The wooden ceramic spherical particle of straw base after moistening is poured into blender to be stirred, in the mistake of stirring Magnesia oxychloride cement slurry is sprayed in journey, is stirred and is sprayed to the wooden ceramic spherical particle of straw base and is wrapped up completely by magnesia oxychloride cement After discharge；
5th step：It conserves 6 hours at ambient temperature, it is wooden in straw base after magnesia oxychloride cement condenses hardening completely After ceramic spherical extra-granular forms the wrapping layer that uniform, thickness is 1~2mm, heat-insulation wall plate high-strength light straw base is made Wood ceramics lightweight aggregate.
The stalk refers to that the ripe crops such as wheat, rice, corn, potato, rape, cotton are remaining after harvesting seed Stem portion.
The agglutinant refers to that three kinds of phenolic resin, alcohol, curing agent materials are mixed for 2: 2: 1 ratio in mass ratio Close gained.
The stalk and agglutinant be in mass ratio 5: 1 ratio mixed obtained by.
The stalk ball is crushed using biological material granulator, is screened, and is suppressed after being mixed in proportion with curing agent, Obtained stalk ball particle diameter can be carried out between 5~20mm, the bulk density of stalk ball by controlling granulator pressure size It adjusts.
The sintering process is sintered using vacuum drying oven, needs to carry out in nitrogen protection in sintering process, sintered 800 DEG C are warming up to 5 DEG C/min of speed, furnace cooling after constant temperature 4.5 hours in journey.
Contain carboxylic acid, sulfonic acid, sulfuric acid, amino or amido polar hydrophilic group in the molecular structure of the surfactant, Surfactant is mixed for 2: 100 in mass ratio with water.
The magnesia oxychloride cement is a kind of rapid hardening and early strength cement, and setting time, intensity reached after hardening within 30 minutes 80MPa intensity includes following substance by mass percentage：
The magnesia oxychloride cement shell layer controls the thickness of wrapping layer, institute's shape by spraying the amount of magnesia oxychloride cement slurry At thickness be 1~2mm, there is good adhesive property with Portland cement, and can prevent external moisture into Enter to inside the wooden ceramic particle of straw base, improve the water resistant ability and durability of particle, makes it possible to carry out with cement slurry It is stirred to prepare heat-insulation wall plate.
The straw base wood ceramics lightweight aggregate grain size is between 5~20mm, and bulk density is between 500kg/m3~1000kg/ m3, cylindrical compress strength is between 0.8MPa~2.7MPa.
Compared to the prior art the present invention, has the following advantages that：
(1) stalk that the present invention is generated using agricultural production process, prepares building heat preservation wallboard lightweight aggregate particle, stalk Belong to renewable biomass resources, will not cause environmental damage, meets the theory of sustainable development.The present invention has overturned tradition Keep the temperature the present situation of lightweight aggregate not recyclable regenerative.
(2) the raw material stalk that the present invention is utilized is the ripe farming such as wheat, rice, corn, potato, rape, cotton Object remaining stem after harvesting seed, inner hollow, made lightweight aggregate internal porous have light, excellent thermal insulation performance The characteristics of.
(3) raw materials stalk of the present invention, raw material sources are easy to get extensively, cheap, also have environmentally protective Feature.
(4) straw base wood ceramics lightweight aggregate prepared by the present invention, outside have one layer of magnesia oxychloride cement shell, the shell There is good adhesive property with cement-based material, and the intensity and water resistant ability of particle can be significantly improved, to improve The intensity of assembling thermal-insulating wall board is a kind of new bio vacuum lightweight aggregate suitable for building field.
Description of the drawings
Fig. 1 is a kind of techniqueflow chart preparing heat-insulation wall plate lightweight aggregate using stalk and magnesia oxychloride cement
Specific implementation mode
A technique for preparing heat-insulation wall plate lightweight aggregate, including five steps using stalk and magnesia oxychloride cement：
The first step：The stalk that grinding screen is chosen is mixed in proportion with agglutinant, is pressed into the stalk of 4~18mm of diameter Ball.
Second step：Stalk ball is put into vacuum drying oven to be sintered, sinters the wooden ceramic spherical particle of straw base into.
Third walks：The mixture of surfactant and water is sprayed on the wooden ceramic spherical particle surface of straw base, makes straw Stalk sill matter ceramic spherical particle tentatively moistens.
4th step：The wooden ceramic spherical particle of straw base after moistening is poured into blender to be stirred, in the mistake of stirring Magnesia oxychloride cement slurry is sprayed in journey, is stirred and is sprayed to the wooden ceramic spherical particle of straw base and is wrapped up completely by magnesia oxychloride cement After discharge.
5th step：It conserves 6 hours at ambient temperature, it is wooden in straw base after magnesia oxychloride cement condenses hardening completely After ceramic spherical extra-granular forms the wrapping layer that uniform, thickness is 1~2mm, heat-insulation wall plate high-strength light straw base is made Wood ceramics lightweight aggregate.
Embodiment 1
A technique for heat-insulation wall plate lightweight aggregate being prepared using stalk and magnesia oxychloride cement, implementation process is as follows：
(1) straw granulator is utilized, to the ripe crops such as wheat, rice, corn, potato, rape, cotton in harvest seed Remaining stalk crushes screening after reality.
(2) three kinds of phenolic resin, alcohol, curing agent materials are mixed for 2: 2: 1 ratio in mass ratio, is prepared into To agglutinant.
(3) ratio that stalk and agglutinant that grinding screen is chosen are 5: 1 in mass ratio is mixed.
(4) utilize biological material granulator, stalk and agglutinant mixture suppressed, obtained diameter between 5~ The bulk density of the stalk ball particle of 20mm, stalk ball particle can be adjusted by controlling granulator pressure size.
(5) stalk ball particle is sintered using vacuum drying oven, needs to carry out in nitrogen protection in sintering process, with 5 DEG C/min speed be warming up to 800 DEG C, the wooden ceramic spherical of straw base is prepared in furnace cooling after constant temperature 4.5 hours Grain.
(6) surfactant containing carboxylic acid, sulfonic acid, sulfuric acid, amino or amido polar hydrophilic group in selecting structure, is pressed Surfactant is mixed for 2: 100 in mass ratio with water, and the mixture of surfactant and water is made.
(7) mixture of surfactant and water is sprayed on the wooden ceramic spherical particle surface of straw base, makes straw base Wood ceramics spheric granules tentatively moistens.
(8) magnesia oxychloride cement is weighed by following mass ratio：
Load weighted material is poured into blender, stirs into the magnesia oxychloride cement slurry of flowing.
(9) the wooden ceramic spherical particle of straw base after moistening is poured into blender to be stirred, during stirring Magnesia oxychloride cement slurry is sprayed, the thickness of wrapping layer is controlled by spraying the amount of magnesia oxychloride cement slurry, stir and is sprayed to The wooden ceramic spherical particle of straw base discharges after being wrapped up completely by magnesia oxychloride cement, is formed by magnesia oxychloride cement shell layer thickness For 1~2mm.
(10) it conserves 6 hours at ambient temperature, after magnesia oxychloride cement condenses hardening completely, in straw base wood ceramics The magnesia oxychloride cement wrapping layer that uniform, thickness is 1~2mm is formed outside spheric granules, and heat-insulation wall plate high-strength light straw are made Stalk base wood ceramics lightweight aggregate.
Obtained straw base wood ceramics lightweight aggregate grain size is between 7~20mm, bulk density through the above steps 690kg/m3, cylindrical compress strength 1.5MPa.

Claims (10)

1. a kind of technology preparing heat-insulation wall plate lightweight aggregate using stalk and magnesia oxychloride cement, it is characterised in that its processing procedure In five steps：
The first step：The stalk that grinding screen is chosen is mixed in proportion with agglutinant, is pressed into the stalk variole of 4~18mm of diameter Grain；
Second step：Stalk ball particle is put into vacuum drying oven to be sintered, sinters the wooden ceramic spherical particle of straw base into；
Third walks：The mixture of surfactant and water is sprayed on the wooden ceramic spherical particle surface of straw base, makes straw base Wood ceramics spheric granules tentatively moistens；
4th step：The wooden ceramic spherical particle of straw base after moistening is poured into blender to be stirred, during stirring Magnesia oxychloride cement slurry is sprayed, stirs and is sprayed to after the wooden ceramic spherical particle of straw base is wrapped up by magnesia oxychloride cement completely Material；
5th step：It conserves 6 hours at ambient temperature, after magnesia oxychloride cement condenses hardening completely, in straw base wood ceramics After forming the wrapping layer that uniform, thickness is 1~2mm outside spheric granules, it is wooden with high-strength light straw base that heat-insulation wall plate is made Ceramic lightweight aggregate.
2. technology according to claim 1, it is characterised in that stalk refer to stalk wheat, rice, corn, potato, rape, The maturation crops such as cotton remaining stem portion after harvesting seed.
3. technology according to claim 1, it is characterised in that agglutinant refers to three kinds of phenolic resin, alcohol, curing agent materials Material in mass ratio be 2: 2: 1 ratio mixed obtained by.
4. technology according to claim 1, it is characterised in that stalk and agglutinant are mixed for 5: 1 ratio in mass ratio Close gained.
5. technology according to claim 1, it is characterised in that stalk ball is crushed using biological material granulator, is screened, It is suppressed after being mixed in proportion with curing agent, obtained stalk ball particle diameter is between 5~20mm, the bulk density of stalk ball It can be adjusted by controlling granulator pressure size.
6. technology according to claim 1, it is characterised in that sintering process is sintered using vacuum drying oven, in sintering process It needs to carry out in nitrogen protection, is warming up to 800 DEG C in sintering process with 5 DEG C/min of speed, constant temperature is after 4.5 hours with stove It is cooling.
7. technology according to claim 1, it is characterised in that in the molecular structure of surfactant containing carboxylic acid, sulfonic acid, Sulfuric acid, amino or amido polar hydrophilic group, surfactant are mixed for 2: 100 in mass ratio with water.
8. technology according to claim 1, it is characterised in that magnesia oxychloride cement is a kind of rapid hardening and early strength cement, setting time Within 30 minutes, intensity reaches 80MPa intensity after hardening, includes following substance by mass percentage：
9. technology according to claim 1, it is characterised in that control package by spraying the amount of magnesia oxychloride cement slurry The thickness of layer, it is 1~2mm to be formed by magnesia oxychloride cement shell layer thickness, has with Portland cement and bonds well Performance, and external moisture can be prevented to enter inside the wooden ceramic particle of straw base, improve particle water resistant ability and Durability, makes it possible to be stirred with cement slurry and mixes to prepare heat-insulation wall plate.
10. pretreatment technique for packing according to claim 1, feature is in obtained straw base wood ceramics lightweight aggregate grain Diameter is between 5~20mm, and bulk density is between 500kg/m3~1000kg/m3, cylindrical compress strength is between 0.8MPa~2.7MPa.
CN201810459757.5A 2018-05-04 2018-05-04 A technique for preparing heat-insulation wall plate lightweight aggregate using stalk and magnesia oxychloride cement Withdrawn CN108640653A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112876206A (en) * 2021-01-26 2021-06-01 徐州工程学院 Straw-based light biological ceramsite and preparation method and application thereof
CN113001711A (en) * 2021-03-12 2021-06-22 江苏剑山包装科技有限公司 Novel manufacturing process of corrugated board
CN113800813A (en) * 2021-10-12 2021-12-17 江西秀川科技有限公司 Recycled aggregate reinforced slurry and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112876206A (en) * 2021-01-26 2021-06-01 徐州工程学院 Straw-based light biological ceramsite and preparation method and application thereof
CN113001711A (en) * 2021-03-12 2021-06-22 江苏剑山包装科技有限公司 Novel manufacturing process of corrugated board
CN113800813A (en) * 2021-10-12 2021-12-17 江西秀川科技有限公司 Recycled aggregate reinforced slurry and preparation method thereof

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Application publication date: 20181012