CN103232197B - Geopolymer tunnel fireproof coating and preparation method thereof - Google Patents
Geopolymer tunnel fireproof coating and preparation method thereof Download PDFInfo
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- CN103232197B CN103232197B CN201310157218.3A CN201310157218A CN103232197B CN 103232197 B CN103232197 B CN 103232197B CN 201310157218 A CN201310157218 A CN 201310157218A CN 103232197 B CN103232197 B CN 103232197B
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Abstract
The invention provides a geopolymer tunnel fireproof coating. The geopolymer tunnel fireproof coating comprises the following raw materials in parts by weight: 35-45 parts of geopolymer, 10-15 parts of expanded perlite, 17-28 parts of expanded vermiculite, 13-15 parts of brucite fiber, 3-5 parts of sepiolite, 3-5 parts of hydroxymethyl cellulose and 0.03-0.05 part of fatty alcohol sulfonate air-entraining agent, wherein the geopolymer comprises the following raw materials in parts by weight: 17 parts of silica fume, 10 parts of kaolin clay, 3 parts of calcium base bentonite, 5 parts of calcium oxide, 10 parts of sodium carbonate, 2 parts of sodium chloride, 3 parts of sodium sulfate and 50 parts of low-calcium fly ash. A geopolymer binder used by the geopolymer tunnel fireproof coating provided by the invention has the characteristics of low cost of material sources, high binding strength and excellent fire resistance and durability; and the tunnel fireproof coating disclosed by the invention has the properties of long fire-resistant limit time, high binding strength and excellent resistance to freezing and thawing, and is the tunnel fireproof coating with good performance.
Description
Technical field
The invention belongs to frie retardant coating field, relate to a kind of fire-proof coating for tunnels, be specifically related to a kind of geopolymer fire-proof coating for tunnels and preparation method thereof.
Background technology
Fire-proof coating for tunnels is special in tunnel wall and vault custom-designed a kind of fireproof coating exclusively from scaling loss in a fire.Current, fire-proof coating for tunnels manufacturer of China is numerous, substantially be all be binding agent with high-alumina cement, the aglite such as pearlstone, expanded vermiculite, coordinate and form fire-proof coating for tunnels, typical problem is that such fire-proof coating for tunnels cohesive strength is low, and the thin fire-protection rating of coating is low, thick coating easily comes off, the ornamental difference of fire protection coating.
Geopolymer has the physical and chemical performance of following uniqueness:
(1) abundant raw material source, cheap.Occurring in nature silico-aluminate raw material rich reserves, simultaneously the solid waste such as industrial slag, flyash, desulphurize fly ash, mill tailings also can be used as silico-aluminate raw material, while reducing costs, the reluctant environmentally harmful material of these ordinary methods can be disposed again, reach the effect turned waste into wealth.
(2) hardened material is fast, intensity is high.Ground polyreaction dehydration is fast, and network skeleton is easily formed.Less than 20 DEG C aquations 4 hours, ultimate compression strength can reach 15 ~ 30MPa.Along with the prolongation of time, this type of strength of materials still has and significantly increases.
(3) Heat stability is good, high temperature resistant.Its thermal conductivity is 0.24-0.38W/mK, can compare favourably with light-weight refractory cob brick (0.3-0.4W/mK).Raw materials used is natural aluminosilicate mineral or industrial solid wastes, and thus material has good fire resistance.Can, under 1000 DEG C of high temperature, keep the process based prediction model of material constant.
(4) good endurance.The distinctive network polymerization structure of ground polymeric material, makes it while maintaining lower shrinking percentage and rate of expansion, has better freeze-thaw-effect.Therefore, ground polymeric material has good endurance quality.
The physical and chemical performance of these uniquenesses of geopolymer is all specially adapted in fire-proof coating for tunnels as binding agent life-time service.But, usual geopolymer need in the silico-aluminates such as water glass solution, metal hydroxides alkaline solution and metakaolin, flyash, slag one or more react, in engineer applied, two-pack is with the use of inconvenience, also uneconomical.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is to, a kind of geopolymer fire-proof coating for tunnels and preparation method thereof is provided.
In order to realize above-mentioned task, the present invention adopts following technical scheme to be achieved:
A kind of geopolymer fire-proof coating for tunnels, with weight basis, be made up of following raw material: geopolymer 35 ~ 45 parts, pearlstone 10 ~ 15 parts, expanded vermiculite 17 ~ 28 parts, brucite fiber 13 ~ 15 parts, sepiolite 3 ~ 5 parts, Walocel MT 20.000PV 3 ~ 5 parts, fatty alcohol sulfonate air entrapment agent 0.03 ~ 0.05 part, wherein:
Described geopolymer, with weight basis, is made up of following raw material: silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor, 3 parts, sodium sulfate, Class F fly ash 50 parts.
Prepare the method for geopolymer fire-proof coating for tunnels as above, the method is carried out according to step as described below:
Step one, according to geopolymer formulation weight number by silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor and the mixing of 3 parts, sodium sulfate, grind into fine powder in ball mill;
Step 2, calcines the fine powder made in step one 3 hours at 750 DEG C;
Step 3, in weight fraction, mixes the fine powder 50 parts after calcining in step 2 with Class F fly ash 50 parts, in ball mill, again grinds into the fine powder of less than 50 microns, can obtain geopolymer;
Step 4, according to geopolymer fire-proof coating for tunnels formulation weight number by geopolymer 35 ~ 45 parts, pearlstone 10 ~ 15 parts, expanded vermiculite 17 ~ 28 parts, brucite fiber 13 ~ 15 parts, sepiolite 3 ~ 5 parts, Walocel MT 20.000PV 3 ~ 5 parts and fatty alcohol sulfonate air entrapment agent 0.03 ~ 0.05 part are uniformly mixed at normal temperatures and can obtain geopolymer fire-proof coating for tunnels.
The present invention also has following technical characterstic:
Described geopolymer fire-proof coating for tunnels is 0.9:1 with the weight proportion of water in use.
Compared to the prior art geopolymer fire-proof coating for tunnels of the present invention, has following technique effect:
(1) the geopolymer binding agent that the present invention uses is compared with aluminosulfate cement, high-alumina cement, silicate cement, and geopolymer has that material source cost is low, and cohesive strength is high, the feature of fire performance and excellent durability.
(2) to have the fire endurance time long for geopolymer fire-proof coating for tunnels of the present invention, and bonding strength is high, the characteristic that freeze-thaw resistance property is excellent, is a kind of fire-proof coating for tunnels of good performance.
Embodiment
Geopolymer is the activity by alkali-activated carbonatite silico-aluminate, spot polyreaction, and the aqueous solution of general conventional water glass and sodium hydroxide excites the silico-aluminates such as metakaolin, flyash, slag.If but geopolymer is used for fire-proof coating for tunnels, the alkali systems of this liquid, bring inconvenience to transport and use.The present invention uses the sodium salt of low melting point as sodium-chlor, sodium sulfate and the polynary congruent melting of dystectic sodium carbonate, the temperature of fusion of sodium carbonate is made to be reduced to 600 ~ 700 DEG C, utilize highly active silicon ash at high temperature to react with alkalimetal oxide and generate water glass, Calucium Silicate powder, sodium disilicate or two Calucium Silicate powder, simultaneously alkaline bentonites soil auxiliary under, at 750 DEG C, kaolin is become highly active metakaolin.
Water glass, sodium disilicate, calcium oxide, metakaolin generation prepolymerization under high temperature, finally mix with flyash, be turned into geology prepolymer, this geology prepolymer can make geopolymer fire-proof coating for tunnels become a kind of coating of single component, convenient transport, during use, only need add water and make geopolymer continue spot polyreaction, realize the shaping of fire-proof coating for tunnels.
Use air entrapment agent can form the bubble of closed pore in geopolymer frie retardant coating, reduce the thermal conductivity of frie retardant coating.
Fire-proof coating for tunnels of the present invention is not only applicable to the fire prevention in various tunnel, and is applicable to the fire prevention of various prestressed concrete structure.
Defer to technique scheme, a kind of geopolymer fire-proof coating for tunnels, with weight basis, be made up of following raw material: geopolymer 35 ~ 45 parts, pearlstone 10 ~ 15 parts, expanded vermiculite 17 ~ 28 parts, brucite fiber 13 ~ 15 parts, sepiolite 3 ~ 5 parts, Walocel MT 20.000PV 3 ~ 5 parts, fatty alcohol sulfonate air entrapment agent 0.03 ~ 0.05 part, wherein:
Described geopolymer, with weight basis, is made up of following raw material: silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor, 3 parts, sodium sulfate, Class F fly ash 50 parts.
Raw material specification in above-mentioned formula requires as described below:
Pearlstone particle diameter is 2.36mm.
Expanded vermiculite particle diameter is 1.18mm ~ 0.6mm.
Brucite fiber length is less than 1mm.
Sepiolite fineness is greater than 800 orders.
Fatty alcohol sulfonate air entrapment agent is that Shanghai Dai Yu Industrial Co., Ltd. produces.
In Class F fly ash, Si:Al ratio is greater than 2.0, and active glassy phase weight content is higher than 40%.Metal oxide M in the mixture of high temperature prepolymerization reaction
2o and activated grammite SiO
2optimum weight ratio be 1.3:2.0.
Geopolymer fire-proof coating for tunnels is 0.9:1 with the weight proportion of water in use.
Prepare the method for geopolymer fire-proof coating for tunnels as above, the method is carried out according to step as described below:
Step one, according to geopolymer formulation weight number by silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor and the mixing of 3 parts, sodium sulfate, grind into fine powder in ball mill;
Step 2, calcines the fine powder made in step one 3 hours at 750 DEG C;
Step 3, in weight fraction, mixes the fine powder 50 parts after calcining in step 2 with Class F fly ash 50 parts, in ball mill, again grinds into the fine powder of less than 50 microns, can obtain geopolymer;
Step 4, according to geopolymer fire-proof coating for tunnels formulation weight number by geopolymer 35 ~ 45 parts, pearlstone 10 ~ 15 parts, expanded vermiculite 17 ~ 28 parts, brucite fiber 13 ~ 15 parts, sepiolite 3 ~ 5 parts, Walocel MT 20.000PV 3 ~ 5 parts and fatty alcohol sulfonate air entrapment agent 0.03 ~ 0.05 part are uniformly mixed at normal temperatures and can obtain geopolymer fire-proof coating for tunnels.
Below provide specific embodiments of the invention, it should be noted that the present invention is not limited to following specific embodiment, all equivalents done on technical scheme basis all fall into protection scope of the present invention.
Embodiment 1:
The present embodiment provides geopolymer fire-proof coating for tunnels, with weight basis, is made up of following raw material: geopolymer 43 parts, pearlstone 12 parts, expanded vermiculite 24 parts, brucite fiber 14 parts, sepiolite 4 parts, Walocel MT 20.000PV 3 parts, fatty alcohol sulfonate air entrapment agent 0.03 part;
Described geopolymer, with weight basis, is made up of following raw material: silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor, 3 parts, sodium sulfate, Class F fly ash 50 parts.
The various performance parameters of geopolymer fire-proof coating for tunnels prepared by the present embodiment is as shown in table 1.
Embodiment 2:
The present embodiment provides geopolymer fire-proof coating for tunnels, with part weight basis, is made up of following raw material: geopolymer 45 parts, pearlstone 10 parts, expanded vermiculite 22 parts, brucite fiber 13 parts, sepiolite 5 parts, Walocel MT 20.000PV 5 parts, fatty alcohol sulfonate air entrapment agent 0.05 part;
Described geopolymer, with weight basis, is made up of following raw material: silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor, 3 parts, sodium sulfate, Class F fly ash 50 parts.
The various performance parameters of geopolymer fire-proof coating for tunnels prepared by the present embodiment is as shown in table 1.
Embodiment 3:
The present embodiment provides geopolymer fire-proof coating for tunnels, with weight basis, is made up of following raw material: geopolymer 35 parts, pearlstone 12 parts, expanded vermiculite 28 parts, brucite fiber 15 parts, sepiolite 5 parts, Walocel MT 20.000PV 5 parts, fatty alcohol sulfonate air entrapment agent 0.05 part;
Described geopolymer, with weight basis, is made up of following raw material: silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor, 3 parts, sodium sulfate, Class F fly ash 50 parts.
The various performance parameters of geopolymer fire-proof coating for tunnels prepared by the present embodiment is as shown in table 1.
Embodiment 4:
The present embodiment provides geopolymer fire-proof coating for tunnels, with weight basis, is made up of following raw material: geopolymer 40 parts, pearlstone 15 parts, expanded vermiculite 20 parts, brucite fiber 15 parts, sepiolite 5 parts, Walocel MT 20.000PV 5 parts, fatty alcohol sulfonate air entrapment agent 0.04 part;
Described geopolymer, with weight basis, is made up of following raw material: silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor, 3 parts, sodium sulfate, Class F fly ash 50 parts.
The various performance parameters of geopolymer fire-proof coating for tunnels prepared by the present embodiment is as shown in table 1.
Embodiment 5:
The present embodiment provides geopolymer fire-proof coating for tunnels, with 100 parts of weight basis, is made up of following raw material: geopolymer 45 parts, pearlstone 15 parts, expanded vermiculite 17 parts, brucite fiber 15 parts, sepiolite 3 parts, Walocel MT 20.000PV 5 parts, fatty alcohol sulfonate air entrapment agent 0.05 part;
Described geopolymer, with 100 parts of weight basis, is made up of following raw material: silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor, 3 parts, sodium sulfate, Class F fly ash 50 parts.
The various performance parameters of geopolymer fire-proof coating for tunnels prepared by the present embodiment is as shown in table 1.
As can be seen from Table 1, fire-proof coating for tunnels in embodiment 1, embodiment 2, embodiment 3, embodiment 4 and embodiment 5, it is long that they all have the fire endurance time, and bonding strength is high, the characteristic that freeze-thaw resistance property is excellent is a kind of fire-proof coating for tunnels of good performance.
Table 1 fire-proof coating for tunnels test-results
Claims (3)
1. a geopolymer fire-proof coating for tunnels, it is characterized in that, with weight basis, be made up of following raw material: geopolymer 35 ~ 45 parts, pearlstone 10 ~ 15 parts, expanded vermiculite 17 ~ 28 parts, brucite fiber 13 ~ 15 parts, sepiolite 3 ~ 5 parts, Walocel MT 20.000PV 3 ~ 5 parts, fatty alcohol sulfonate air entrapment agent 0.03 ~ 0.05 part, wherein:
Described geopolymer, with weight basis, is made up of following raw material: silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor, 3 parts, sodium sulfate, Class F fly ash 50 parts.
2. geopolymer fire-proof coating for tunnels as claimed in claim 1, is characterized in that, described geopolymer fire-proof coating for tunnels is 0.9:1 with the weight proportion of water in use.
3. preparation is as the method for the geopolymer fire-proof coating for tunnels in claim 1 and claim 2 as described in any one claim, and it is characterized in that, the method is carried out according to step as described below:
Step one, according to geopolymer formulation weight number by silicon ash 17 parts, kaolin 10 parts, calcium-base bentonite 3 parts, 5 parts, calcium oxide, 10 parts, sodium carbonate, 2 parts, sodium-chlor and the mixing of 3 parts, sodium sulfate, grind into fine powder in ball mill;
Step 2, calcines the fine powder made in step one 3 hours at 750 DEG C;
Step 3, in weight fraction, mixes the fine powder 50 parts after calcining in step 2 with Class F fly ash 50 parts, in ball mill, again grinds into the fine powder of less than 50 microns, can obtain geopolymer;
Step 4, according to geopolymer fire-proof coating for tunnels formulation weight number by geopolymer 35 ~ 45 parts, pearlstone 10 ~ 15 parts, expanded vermiculite 17 ~ 28 parts, brucite fiber 13 ~ 15 parts, sepiolite 3 ~ 5 parts, Walocel MT 20.000PV 3 ~ 5 parts and fatty alcohol sulfonate air entrapment agent 0.03 ~ 0.05 part are uniformly mixed at normal temperatures and can obtain geopolymer fire-proof coating for tunnels.
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| CN103641496B (en) * | 2013-11-26 | 2015-02-11 | 江苏博思源防火材料科技有限公司 | Expansive type tunnel fireproof paint |
| CN104927637A (en) * | 2015-06-11 | 2015-09-23 | 阜南县中泰工艺品有限公司 | Flame-retardant wood product coating |
| CN105819752B (en) * | 2016-04-07 | 2018-04-06 | 中海得金科技有限公司 | A kind of nanometer oyster shell whiting ecological functions are flat to apply coating |
| CN109996849A (en) * | 2016-09-26 | 2019-07-09 | 图像电子公司 | The ink-jet of construction material is decorated |
| CN107418334A (en) * | 2017-07-27 | 2017-12-01 | 芜湖市三山龙城新材料有限公司 | A kind of building thermal-insulating coating and preparation method thereof |
| US11021399B2 (en) | 2019-01-23 | 2021-06-01 | United States Gypsum Company | Self-consolidating geopolymer compositions and methods for making same |
| CN109971261A (en) * | 2019-04-01 | 2019-07-05 | 刘喜英 | A kind of fireproof flame-retardant coating and preparation method thereof |
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| CN101045832A (en) * | 2007-03-22 | 2007-10-03 | 袁景华 | Polymer coating composite and preparation method thereof |
| CN101747675A (en) * | 2010-01-18 | 2010-06-23 | 江西三星气龙新材料股份有限公司 | Tunnel fireproof paint |
| CN102276229A (en) * | 2011-05-17 | 2011-12-14 | 广西大学 | Inorganic coating adopting geopolymer material as film-forming material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101045832A (en) * | 2007-03-22 | 2007-10-03 | 袁景华 | Polymer coating composite and preparation method thereof |
| CN101747675A (en) * | 2010-01-18 | 2010-06-23 | 江西三星气龙新材料股份有限公司 | Tunnel fireproof paint |
| CN102276229A (en) * | 2011-05-17 | 2011-12-14 | 广西大学 | Inorganic coating adopting geopolymer material as film-forming material |
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