CN1706768A - Heat-insulating flyash colloid material and its prepn process - Google Patents
Heat-insulating flyash colloid material and its prepn process Download PDFInfo
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- CN1706768A CN1706768A CNA200410046371XA CN200410046371A CN1706768A CN 1706768 A CN1706768 A CN 1706768A CN A200410046371X A CNA200410046371X A CN A200410046371XA CN 200410046371 A CN200410046371 A CN 200410046371A CN 1706768 A CN1706768 A CN 1706768A
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- fly ash
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- 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 present invention relates to one kind of heat insulting flyash colloid material and its preparation process. The heat insulting flyash colloid material includes flyash 30-40 wt%, liquid water glass 45-50 wt%, sodium fluorosilicate 5-10 wt%, water 1-3 wt%, talcum powder 5-10 wt% and hydrogen peroxide solution in 3-5 vol%. The preparation process includes mixing the materials in some container, molding and curing naturally. The present invention has the advantages of utilization of industrial waste, low power consumption, low cost, high product performance, light weight, simple production process, acid resistance and heat resistance.
Description
The technical field is as follows:
the invention relates to a fly ash colloid thermal insulation material and a process method thereof. Belongs to the field of building materials.
Secondly, the technical background is as follows:
1. the building materials used at present, such as cement, can not fully meet the use requirements in the environment buildings with the technological requirements of acid resistance and high temperature resistance and the use of special environmental engineering, and an insulating layer is additionally required for the buildings with the heat insulation requirements.
Thirdly, the invention aims to:
the invention aims to provide a fly ash colloid thermal insulation material with novel process material, good performance, light weight and high temperature resistance and a process method thereof aiming at the defects in the prior art.
Fourthly, the invention content:
1. the heat-insulating material comprises the following components in percentage by weight: (100% by weight)
Fly ash: 30 to 40 percent of
The gelled material refers to liquid water glass: 45 to 50 percent of
Diluent water: 1 to 3 percent of
The curing agent is sodium fluosilicate: 5-10 percent
The lubricant is talcum powder: 5-10 percent
The foaming agent is hydrogen peroxide: the addition amount of the material accounts for 3-5% (volume) of the total volume of the material after being made and molded;
the pore wall compacting agent is bran fermentation: when the material is not foamed, 0.1-1% furfuryl alcohol is added, and sand is added at the same time.
2. The specific process comprises the following steps:
weighing fly ash material weight in an environment with the temperature of 10-20 ℃, placing the fly ash material weight in a container, adding talcum powder according to a proportion, then adding liquid water glass and water according to a weight proportion, quickly adding curing agent sodium fluosilicate according to a weight proportion after uniformly stirring, quickly adding foaming agent hydrogen peroxide according to a quantitative volume, quickly stirring uniformly, and pouring into a mold. The fly ash colloid thermal insulation material is naturally maintained without adding water, and the maintenance time is 1 to 3 days.
The principle is as follows:
the main chemical component of the fly ash is SiO2+Al2O3+Fe2O3In fly ashIn the chemical reaction of the colloidal material, although some chemical components in the fly ash are more or less involved in the reaction, in theory, the fly ash is only regarded as an inert material, does not participate in the reaction between other chemical raw materials, and only plays a role in pure powder filling.
Sodium silicate Na2O·nSiO2+mH2And O is used as a cementing material in the fly ash colloidal material. The modulus of the water glass depends on the conditions of environment, temperature, humidity and the like, construction, material hardening time and powder qualityAnd (4) determining.
In the fly ash colloidal material, sodiumfluosilicate Na is mainly used as a curing agent2SiF6. The reaction equation is as follows:
(1) hydrolysis reaction of raw material
a. Hydrolysis of water glass:
the reaction product is silica gel Si (OH)4。
b. Hydrolysis of sodium fluosilicate:
(2) and (3) chemical combination reaction between raw material hydrolysis:
the hydrolysis product of water glass and the hydrolysis product of sodium fluosilicate have the following chemical combination reaction except that silica gel is precipitated and attached to the fly ash material to play a bonding role
Reaction of sodium hydroxide with hydrogen fluoride:
reaction of the above chemical raw materials with Compounds
In the above reaction, the product is mainly sodium fluoride, and if the compactness of the material is insufficient, it will pass through the pores of the material and be precipitated in succession.
(3) Chemical reaction during curing
Curing of water glass in air
Dehydrating silica gel at 15-30 deg.C
In the chemical reaction, silica gel is continuously separated out, solidified and dehydrated. The fly ash material is completed with the reaction going deep. The furfuryl alcohol is added to mainly increase the compactness among materials, block capillary pores of the materials, and compactly fill the separated sodium fluoride NaF which is a reaction product among the materials, so that the compressive strength is improved, and the invasion of water and steam to the materials is prevented.
When the foamed masonry is made of the fly ash colloidal material, fly ash is used independently, a certain amount of talcum powder is added, the talcum powder and liquid water glass are stirred, and after the mixture is uniformly stirred, a foaming agent hydrogen peroxide H is added according to the size of a foaming gap2O2. Simultaneously adding curing agent sodium fluosilicate Na2SiF6. After adding, stirring rapidly, pouring into a mold, and naturally drying and maintaining at 15-30 deg.C in shade and place where air is difficult to circulate. Can be solidified within 1-2 hours. The mold can be removed after 2 to 3 days.
In the chemical reaction process, hydrogen peroxide is only used as a foaming agent, and the talcum powder plays a role in lubricating and closing pores.
Fifthly, the invention has the following effects:
1. the curing time is short, and the curing can be carried out within 1 to 2 hours at the temperature of between 15 and 30 ℃. The mold can be removed after 2 to 3 days. No need of steam and pressurized curing.
2. The fly ash colloid material heat-insulating foaming masonry has light weight and good compressive strength. The weight is controlled between 250-550kg/m3, and the compressive strength can reach 2 MPa.
3. The invention can use a large amount of industrial waste fly ash, has no grade limitation on the fly ash, reduces the product cost and is beneficial to environmental protection.
Sixth, example:
weighing 40% of fly ash material by weight in an environment with the temperature of 10-20 ℃, placing the fly ash material in a container, adding 6% of talcum powder, then adding 47% of liquid sodium silicate and 2% of water, stirring uniformly, quickly adding 5% of curing agent sodium fluosilicate, stirring, quickly adding 4% of foaming agent hydrogen peroxide according to the volume ration, quickly stirring uniformly, and pouring into a mold. The fly ash colloid heat-insulating material is naturally maintained without adding water during maintenance, and the maintenance time is 1 to 3 days.
The invention solves the problems that:
1. the industrial waste fly ash with different grades is directly used, the usage amount of the fly ash is large, the curing time is short, and the usage amount and the usage range of the fly ash are enlarged.
2. The material is not easy to have the phenomena of expansion cracks and drying cracks.
3. Provides a simple and easy production and operation flow.
The invention has the advantages that:
1. can effectively utilize industrial waste in large quantity.
2. The fly ash colloidal material has short curing time, does not need steam curing, saves energy, reduces cost and shortens production period.
3. The product has novel structure and good performance. High strength, light weight, simple production operation and low process requirement.
4. The fly ash colloidal material is acid-resistant and high-temperature-resistant.
Claims (2)
1. A fly ash colloid thermal insulation material and a process method thereof are characterized in that: the heat-insulating material comprises the following components in percentage by weight: (100% by weight)
Fly ash: 30-40%;
the gelled material refers to liquid water glass: 45-50 percent;
diluent water: 1 to 3 percent;
the curing agent is sodium fluosilicate: 5 to 10 percent;
the lubricant is talcum powder: 5 to 10 percent;
the foaming agent is hydrogen peroxide: the addition amount of the material accounts for 3-5% of the total volume of the material after the material is manufactured and molded;
the pore wall compacting agent is furfuryl alcohol: when the material is not foamed, 0.1-1% furfuryl alcohol is added, and sand is added at the same time.
2. A fly ash colloid thermal insulation material and a process method thereof are characterized in that: the specific process comprises the following steps:
weighing fly ash material weight in an environment with the temperature of 10-20 ℃, placing the fly ash material weight in a container, adding talcum powder according to a proportion, then adding liquid water glass and water according to a weight proportion, quickly adding curing agent sodium fluosilicate according to a weight proportion after uniformly stirring, quickly adding foaming agent hydrogen peroxide according to a quantitative volume, quickly stirring uniformly, and pouring into a mold. Thefly ash colloid thermal insulation material is naturally maintained without adding water, and the maintenance time is 1 to 3 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200410046371XA CN1706768A (en) | 2004-06-08 | 2004-06-08 | Heat-insulating flyash colloid material and its prepn process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200410046371XA CN1706768A (en) | 2004-06-08 | 2004-06-08 | Heat-insulating flyash colloid material and its prepn process |
Publications (1)
| Publication Number | Publication Date |
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| CN1706768A true CN1706768A (en) | 2005-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200410046371XA Pending CN1706768A (en) | 2004-06-08 | 2004-06-08 | Heat-insulating flyash colloid material and its prepn process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603357A (en) * | 2012-03-22 | 2012-07-25 | 江苏南瓷绝缘子有限公司 | Method for manufacturing foam ceramic heat-insulation plate with closed pores |
| CN104892023A (en) * | 2015-05-25 | 2015-09-09 | 通化耐博新材料股份有限公司 | Foaming light heat-insulating material |
-
2004
- 2004-06-08 CN CNA200410046371XA patent/CN1706768A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603357A (en) * | 2012-03-22 | 2012-07-25 | 江苏南瓷绝缘子有限公司 | Method for manufacturing foam ceramic heat-insulation plate with closed pores |
| CN102603357B (en) * | 2012-03-22 | 2013-12-11 | 江苏南瓷绝缘子有限公司 | Method for manufacturing foam ceramic heat-insulation plate with closed pores |
| CN104892023A (en) * | 2015-05-25 | 2015-09-09 | 通化耐博新材料股份有限公司 | Foaming light heat-insulating material |
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