CN108911661A - A kind of preparation method of the high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre - Google Patents
A kind of preparation method of the high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre Download PDFInfo
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- CN108911661A CN108911661A CN201810674242.7A CN201810674242A CN108911661A CN 108911661 A CN108911661 A CN 108911661A CN 201810674242 A CN201810674242 A CN 201810674242A CN 108911661 A CN108911661 A CN 108911661A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
Abstract
The preparation method of the invention discloses a kind of high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre, ceramics/nylon composite fibre will be surface-treated and high strength gypsum powder mixes, ball milling is uniformly dispersed, the cullet steel fibre with steel slag/slag composite micro-powder, carbide slag, surface by the processing of EDTA solution, composite water-proof agent mix again, it stirs and evenly mixs, enter mold forming, conserve drying, high-strength and waterproofing water-proof gypsum based cementitious material is made.Using the natural gypsum as raw material, high strength gypsum is prepared using pressurized thermal water method, adding compound crystal modifier can obtain that crystal is regular, the close high strength gypsum of arrangement, and high strength gypsum crystallinity is high, and crystal development is complete, and compression strength is high after hydration and hardening.It uses ceramics/nylon composite fibre for reinforcement, composite fibre is added in high strength gypsum powder by way of ball milling, can be realized the combination of fine dispersion and fiber and plaster matrix of the fiber in gypsum slurry, its thermal conductivity and gas permeability can be improved.
Description
Technical field
The invention belongs to gypsum fields, and in particular to a kind of high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre
Preparation method.
Background technique
The features such as αsemiwatergypsum possesses crystal rule, arrangement is close, intensity is high, also known as high strength gypsum, however, gypsum
It is hygroscopic, cause its intensity to decline, directly affects its application, the intensity and water resistance for how improving gypsum are gypsum industries
One of urgent problem to be solved.
Gypsum and its product have excellent sound insulation, it is heat-insulated, can breathe and fire protecting performance, be acknowledged as green building material
Material.But building gypsum setting time is short, poor water resistance and cracking resistance are insufficient, limits its application and promotes.The present invention with
The natural gypsum is raw material, based on collaboration optimization function, carries out chemical modification to it using different solid waste, solves paring stone
Cream drawbacks described above, and then a kind of high-strength, water-fast, cracking resistant type gypsum block is developed, properties of product are improved, are realized a variety of useless
The collaboration of gurry utilizes.
Using high strength gypsum powder as raw material, it is modified using steel slag, carbide slag and cullet steel various solid wastes, compared with
It solves that building gypsum setting time is short, the poor disadvantage low with cracking resistance of water resistance well, is improving building gypsum performance
While, solve solid waste stockpiling land occupation, pollution environment and problem of resource waste, realize and make the best use of everything, have compared with
High economic benefit and environmental benefit.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of high-strength and waterproofing water-proof gypsum base containing modified fibre is provided
The preparation method of cementitious material, the gypsum based gel material according to this method preparation have good waterproof water resistance, cracking resistance
Performance, thermal conductivity and gas permeability.
The present invention is achieved by the following technical solutions：
A kind of preparation method of the high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre, which is characterized in that including as follows
Step：
（1）Pressurized thermal water method prepares high strength gypsum powder：
The natural gypsum is crushed, is sieved with 100 mesh sieve, 90-100 parts of land plasters and water are mixed by plaster-water ratio 50%, are fallen after mixing evenly
Enter in autoclave, add compound crystal modifier, the hydro-thermal reaction 1-2h at 118-122 DEG C of hydrothermal temperature, filtering, filter cake are dry
Drying, grinding obtain high strength gypsum powder at 108-112 DEG C of dry temperature；
（2）The surface treatment of ceramics, nylon composite fibre：
Coupling agent alcoholic solution is added into ceramic fibre, nylon fiber, after stirring 5-10min, then impregnates 20-25min, filtering,
It is cleaned with aqueous acetone solution, is put into drying in drying box, obtains surface treatment composite fibre；
（3）Modification that the waterproof of gypsum based gel material is water-fast：
Gained high strength gypsum powder in gained surface treatment composite fibre in (2) and (1) is mixed, ball milling 1-2h is uniformly dispersed, then
It is cullet steel fibre with 20-25 parts of composite micro-powders, 8-10 parts of carbide slags, 1-2 parts of surfaces by the processing of EDTA solution, compound anti-
Aqua mixing, stirs and evenly mixs, and enters mold forming, conserves drying, and high-strength and waterproofing water-proof gypsum based cementitious material is made.
Further, step（1）In compound crystal modifier be made of 0.2-0.3 parts of sodium citrates and 2-3 parts of aluminum aluminum sulfates.
Further, step（2）Middle to be made into coupling agent alcoholic solution with silane coupling agent, second alcohol and water, ceramics/nylon is compound
Fiber content is 0.75-1.25 parts, the quality proportioning of the two is 1:1.
Further, step（3）It is middle that by discarded glass reinforced plastic, manufactured cullet steel fibre, fiber are long after Mechanical Crushing
Degree is 10-15mm, after impregnating 1-2h with sodium hydroxide solution (pH=13), then is soaked in the EDTA solution (tune of 0.15 mol/L
Save pH be 11) in 1-2h, it is dry with distilled water repeated flushing to neutrality, obtain the cullet that the processing of EDTA solution is passed through on surface
Steel fibre.
Further, step（3）Middle composite micro-powder is by steel slag, slag 1:1 mixing, composite water-proof agent is by 4-5 parts of paraffin creams
Liquid, 5-6 part polyvinyl alcohol and 6-7 parts of alunite compositions.
The present invention has the following advantages that compared with prior art：
（1）Using the natural gypsum as raw material, high strength gypsum is prepared using pressurized thermal water method, adds compound crystal modifier sodium citrate and sulphur
Sour aluminium potassium, can obtain that crystal is regular, the close high strength gypsum of arrangement, and high strength gypsum crystallinity is high, and crystal development is complete, aquation
Compression strength is high after hardening.
（2）It uses ceramics, nylon composite fibre for reinforcement, composite fibre is added to high-strength stone by way of ball milling
In cream powder, and dispersed, fiber can be realized in calcium plaster using the fiber addition manner that fiber and gypsum powder mix
The combination of fine dispersion and fiber and plaster matrix in material, can improve its thermal conductivity and gas permeability.
（3）Using high strength gypsum powder as raw material, industrial solid castoff (steel slag, slag) is used as mineral admixture,
Raw hydration reaction is issued in the synergistic effect of carbide slag alkaline excitation and high temperature rapid curing, in addition between material and aquation
The synergistic effect of process reduces the porosity of gypsum, improves its compaction rate, and the water resistance and mechanical strength of gypsum obtain
It improves；
For the cracking resistance for improving plastering, by discarded glass reinforced plastic, manufactured cullet steel fibre is added after Mechanical Crushing
Into gypsum based composite cementing material system, there are apparent synergistic combination effect between cullet steel fibre and cementitious material,
Cullet steel fiber surface is after sodium hydroxide solution and the processing of EDTA solution, and fiber surface roughness improves, with matrix
Interface binding intensity enhancing；
Composite water-proof agent paraffin wax emulsions, polyvinyl alcohol and alunite are added, the water resistance of gypsum, paraffin wax emulsions and poly- second are improved
The incorporation of enol all changes high strength gypsum crystal morphology, to influence its intensity, alunite incorporation makes high strength gypsum aquation not
Completely, lead to its hardenite strength reduction, paraffin wax emulsions, polyvinyl alcohol and alunite can reduction gypsum to a certain extent it is brilliant
Density inside high strength gypsum is improved, to reduce its water absorption rate in gap between body and crystal.
Specific embodiment
Embodiment 1
A kind of preparation method of the high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre, which is characterized in that including as follows
Step：
（1）Pressurized thermal water method prepares high strength gypsum powder：
The natural gypsum is crushed, is sieved with 100 mesh sieve, 90 parts of land plasters and water are mixed by plaster-water ratio 50%, pour into height after mixing evenly
It presses in reaction kettle, adds compound crystal modifier, the hydro-thermal reaction 1h at 118-122 DEG C of hydrothermal temperature, filtering, filter cake are in drying temperature
Drying, grinding obtain high strength gypsum powder at 108-112 DEG C；
（2）The surface treatment of ceramics, nylon composite fibre：
Coupling agent alcoholic solution is added into ceramic fibre, nylon fiber, after stirring 5min, then impregnates 20min, filters, uses acetone
Aqueous cleaning is put into drying in drying box, obtains surface treatment composite fibre；
（3）Modification that the waterproof of gypsum based gel material is water-fast：
Gained high strength gypsum powder in gained surface treatment composite fibre in (2) and (1) is mixed, ball milling 1h is uniformly dispersed, then with
Cullet steel fibre, the composite water-proof agent of 20 parts of composite micro-powders, 8 parts of carbide slags, 1 part of surface by the processing of EDTA solution mix,
It stirs and evenly mixs, enters mold forming, conserve drying, high-strength and waterproofing water-proof gypsum based cementitious material is made.
Further, step（1）In compound crystal modifier be made of 0.2 part of sodium citrate and 2 parts of aluminum aluminum sulfates.
Further, step（2）Middle to be made into coupling agent alcoholic solution with silane coupling agent, second alcohol and water, ceramics/nylon is compound
Fiber content is 0.75 part, the quality proportioning of the two is 1:1.
Further, step（3）It is middle that by discarded glass reinforced plastic, manufactured cullet steel fibre, fiber are long after Mechanical Crushing
Degree is 10-15mm, after impregnating 1h with sodium hydroxide solution (pH=13), then is soaked in the EDTA solution (adjusting of 0.15 mol/L
PH be 11) in 1h, it is dry with distilled water repeated flushing to neutrality, it is fine to obtain cullet steel of the surface by the processing of EDTA solution
Dimension.
Further, step（3）Middle composite micro-powder is by steel slag, slag 1:1 mixing, composite water-proof agent by 4 parts of paraffin wax emulsions,
5 parts of polyvinyl alcohol and 6 parts of alunite compositions.
Embodiment 2
A kind of preparation method of the high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre, which is characterized in that including as follows
Step：
（1）Pressurized thermal water method prepares high strength gypsum powder：
The natural gypsum is crushed, is sieved with 100 mesh sieve, 100 parts of land plasters and water are mixed by plaster-water ratio 50%, are poured into after mixing evenly
In autoclave, compound crystal modifier is added, the hydro-thermal reaction 2h at 118-122 DEG C of hydrothermal temperature, filtering, filter cake are in dry temperature
Drying, grinding obtain high strength gypsum powder at 108-112 DEG C of degree；
（2）The surface treatment of ceramics, nylon composite fibre：
Coupling agent alcoholic solution is added into ceramic fibre, nylon fiber, after stirring 10min, then impregnates 25min, filters, uses acetone
Aqueous cleaning is put into drying in drying box, obtains surface treatment composite fibre；
（3）Modification that the waterproof of gypsum based gel material is water-fast：
Gained high strength gypsum powder in gained surface treatment composite fibre in (2) and (1) is mixed, ball milling 2h is uniformly dispersed, then with
Cullet steel fibre, the composite water-proof agent of 25 parts of composite micro-powders, 10 parts of carbide slags, 2 parts of surfaces by the processing of EDTA solution mix,
It stirs and evenly mixs, enters mold forming, conserve drying, high-strength and waterproofing water-proof gypsum based cementitious material is made.
Further, step（1）In compound crystal modifier be made of 0.3 part of sodium citrate and 3 parts of aluminum aluminum sulfates.
Further, step（2）Middle to be made into coupling agent alcoholic solution with silane coupling agent, second alcohol and water, ceramics/nylon is compound
Fiber content is 1.25 parts, the quality proportioning of the two is 1:1.
Further, step（3）It is middle that by discarded glass reinforced plastic, manufactured cullet steel fibre, fiber are long after Mechanical Crushing
Degree is 10-15mm, after impregnating 2h with sodium hydroxide solution (pH=13), then is soaked in the EDTA solution (adjusting of 0.15 mol/L
PH be 11) in 2h, it is dry with distilled water repeated flushing to neutrality, it is fine to obtain cullet steel of the surface by the processing of EDTA solution
Dimension.
Further, step（3）Middle composite micro-powder is by steel slag, slag 1:1 mixing, composite water-proof agent by 5 parts of paraffin wax emulsions,
6 parts of polyvinyl alcohol and 7 parts of alunite compositions.
Comparative example 1
This comparative example 1 compared with Example 1, in step（1）In be not added with compound crystal modifier sodium citrate and aluminum aluminum sulfate,
Method and step in addition to this is all the same.
Comparative example 2
This comparative example 2 compared with Example 2, in step（3）In do not add composite water-proof agent paraffin wax emulsions, polyvinyl alcohol and
Alunite, method and step in addition to this are all the same.
Control group
Application No. is：A kind of dry-mixed mortar containing desulfurized gypsum disclosed in 2017111493311.
It is real to above-described embodiment 1, embodiment 2, comparison in order to compare the performance of gypsum based gel material produced by the present invention
Apply the dry-mixed mortar containing desulfurized gypsum of example 1, gypsum based gel material prepared by comparative example 2 and control group, progressive
It can test, test method is carried out according to professional standard：
As can be seen from the above table, compound crystal modifier sodium citrate and aluminum aluminum sulfate, prepared stone are not added in comparative example 1
The anti-folding of cream, compression strength are deteriorated, and do not add composite water-proof agent paraffin wax emulsions, polyvinyl alcohol and alum in comparative example 2
Stone causes the waterproof water resistance of gypsum to be deteriorated；There is very strong waterproof by the gypsum based gel material of the method for the present invention preparation
Water resistance, cracking resistance, thermal conductivity and gas permeability, safe to use, long service life, great popularizing value and city
Field competitiveness.
Claims (5)
1. a kind of preparation method of the high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre, which is characterized in that including such as
Lower step：
（1）Pressurized thermal water method prepares high strength gypsum powder：
The natural gypsum is crushed, is sieved with 100 mesh sieve, 90-100 parts of land plasters and water are mixed by plaster-water ratio 50%, are fallen after mixing evenly
Enter in autoclave, add compound crystal modifier, the hydro-thermal reaction 1-2h at 118-122 DEG C of hydrothermal temperature, filtering, filter cake are dry
Drying, grinding obtain high strength gypsum powder at 108-112 DEG C of dry temperature；
（2）The surface treatment of ceramics, nylon composite fibre：
Coupling agent alcoholic solution is added into ceramic fibre, nylon fiber, after stirring 5-10min, then impregnates 20-25min, filtering,
It is cleaned with aqueous acetone solution, is put into drying in drying box, obtains surface treatment composite fibre；
（3）Modification that the waterproof of gypsum based gel material is water-fast：
Gained high strength gypsum powder in gained surface treatment composite fibre in (2) and (1) is mixed, ball milling 1-2h is uniformly dispersed, then
It is cullet steel fibre with 20-25 parts of composite micro-powders, 8-10 parts of carbide slags, 1-2 parts of surfaces by the processing of EDTA solution, compound anti-
Aqua mixing, stirs and evenly mixs, and enters mold forming, conserves drying, and high-strength and waterproofing water-proof gypsum based cementitious material is made.
2. a kind of preparation side of high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre according to claim 1
Method, which is characterized in that step（1）In compound crystal modifier be made of 0.2-0.3 parts of sodium citrates and 2-3 parts of aluminum aluminum sulfates.
3. a kind of preparation side of high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre according to claim 1
Method, which is characterized in that step（2）It is middle to be made into coupling agent alcoholic solution, the compound fibre of ceramics/nylon with silane coupling agent, second alcohol and water
Dimension hplc is 0.75-1.25 parts, the quality proportioning of the two is 1:1.
4. a kind of preparation side of high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre according to claim 1
Method, which is characterized in that step（3）It is middle by discarded glass reinforced plastic after Mechanical Crushing manufactured cullet steel fibre, fibre length
For 10-15mm, after impregnating 1-2h with sodium hydroxide solution (pH=13), then it is soaked in the EDTA solution (adjusting of 0.15 mol/L
PH be 11) in 1-2h, it is dry with distilled water repeated flushing to neutrality, obtain the cullet steel that the processing of EDTA solution is passed through on surface
Fiber.
5. a kind of preparation side of high-strength and waterproofing water-proof gypsum based cementitious material containing modified fibre according to claim 1
Method, which is characterized in that step（3）Middle composite micro-powder is by steel slag, slag 1:1 mixing, composite water-proof agent by 4-5 parts of paraffin wax emulsions,
5-6 parts of polyvinyl alcohol and 6-7 parts of alunite compositions.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111848105A (en) * | 2020-07-30 | 2020-10-30 | 福建省中能泰丰节能环保科技有限公司 | Composite heat-insulating material containing ceramic fiber and preparation method thereof |
| CN114477943A (en) * | 2022-03-01 | 2022-05-13 | 武汉理工大学 | High-water-resistance carbonized consolidated fiber cement board and preparation method thereof |
| CN115196933A (en) * | 2022-05-20 | 2022-10-18 | 济南大学 | Modified waste wind power blade regenerated fiber reinforced gypsum-based composite material and preparation method thereof |
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| GB191307907A (en) * | 1913-04-04 | 1913-12-11 | Archibald Denny | Improved Composition for Flooring and like purposes. |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111848105A (en) * | 2020-07-30 | 2020-10-30 | 福建省中能泰丰节能环保科技有限公司 | Composite heat-insulating material containing ceramic fiber and preparation method thereof |
| CN114477943A (en) * | 2022-03-01 | 2022-05-13 | 武汉理工大学 | High-water-resistance carbonized consolidated fiber cement board and preparation method thereof |
| CN115196933A (en) * | 2022-05-20 | 2022-10-18 | 济南大学 | Modified waste wind power blade regenerated fiber reinforced gypsum-based composite material and preparation method thereof |
| CN115196933B (en) * | 2022-05-20 | 2023-03-10 | 济南大学 | Modified waste wind power blade regenerated fiber reinforced gypsum-based composite material and preparation method thereof |
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