CN101134854B - Tunnel fire-proof paint - Google Patents
Tunnel fire-proof paint Download PDFInfo
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- CN101134854B CN101134854B CN2007100358596A CN200710035859A CN101134854B CN 101134854 B CN101134854 B CN 101134854B CN 2007100358596 A CN2007100358596 A CN 2007100358596A CN 200710035859 A CN200710035859 A CN 200710035859A CN 101134854 B CN101134854 B CN 101134854B
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Abstract
The tunnel fireproofing material consists of sulforaluminate cement 30-50 wt%, inorganic heat insulating stuffing expanded perlite 5-30 wt%, expanded vermiculite 13-40 wt%, kaolin 5-15 wt%, aluminum hydroxide 5-20 wt%, magnesium hydroxide 0-25 wt%, diatomite 0-3 wt%, mine slag 0-10 wt%, redispersible glue powder 2-10 wt%, water reducing agent 0.1-2 wt%, expanded fire retardant 0-1 wt%, reinforcing fiber 0-1 wt%, setting retarder 0-5 wt% and setting accelerator 0-3 wt%. The tunnel fireproofing material has the advantages of high water resistance, high weather resistance, high fire resistance, high corrosion resistance, high stability and other advantages.
Description
Technical field
The present invention relates to a kind of frie retardant coating, specifically, relate to a kind of fire-proof coating for tunnels.
Technical background
Along with the fast development of highway, railway construction, the tunnel has become buildings common in the Modern Traffic engineering.Along with expanding economy, China's traffic engineering construction scale is increasing, and the tunnel number is more and more, and the tunnel mileage is more and more longer.Because the singularity of tunnel construction structure, environmental facies are to airtight, and traffic density is big, in case presence of fire in the tunnel, fire extinguishing is difficulty quite, and the tunnel construction thing mostly is skeleton construction, non-refractory, in case presence of fire, temperature increases rapidly, and Steel Concrete at high temperature can crack, until strength loss, collapse, thereby cause great loss of life and personal injury and property damage.Therefore, raising tunnel fire proofing ability is very important.
At tunnel construction thing surface sprayed fire proofing coating, the heat energy when stoping fire to take place directly imports tunnel construction thing surface into, prolongs the tunnel construction thing heating-up time, wins the spray meeting to fire-fighting, is to make one of important measures that the tunnel avoids being damaged.
The development of external fire-proof coating for tunnels has the history of four more than ten years.Main manufacturer is CAFCO international corporation and CERAMICOAT company limited, and the production base mainly is located at Britain, the U.S., France etc., has now entered states such as Korea S, Singapore, India.Before and after the applied research of China's fire-proof coating for tunnels started from 2000.For example, disclose for Chinese invention patent application CN1544556A number to disclose for a kind of " fire-proof coating for tunnels and preparation technology thereof ", CN1594452A number to disclose for a kind of " segmental type environmental protection fire-proof coating for tunnels ", CN1640949A number and disclose " a kind of single system and composite fire retardant coating for tunnel ", CN1916086A number for a kind of " fire-proof coating for tunnels and manufacturing thereof and construction technology ", CN1687254A number and disclose a kind of " fire-proof coating for tunnels and preparation method thereof " etc.The binding agent of above frie retardant coating is mainly silicate material, high-alumina cement and phosphoric acid salt agglutinate.The silicate cement gel material is corrosion-resistant, the impermeabilisation ability, and shrinkability is big, easily returns frost; High-alumina cement agglutination material fire performance is good, but because material microstructure instability easily shrinks, causes the dope layer cracking, comes off.
With regard to the integral status of existing tunnel frie retardant coating, there is following defective: (1) thick coating, heat-proof quality is not good enough, and general thickness is at 20-30mm, fire-resistantly just can reach 3h, because thickness is big, constructional difficulties, long in time limit; In addition, increase structural load, improve the tunnel construction cost; (2) cohesive strength is low, and the cohesive strength of thick formed steel construction frie retardant coating only is 0.115MPa, when vehicle passes through, can produce vacuum, high wind and vibrations, easily comes off; (3) weathering resistance is poor, and the tunnel is because infiltration is in wet environment for a long time, and coating easily returns halogen, anti-frost, and freezed in winter makes the coating efflorescence, destroys, comes off; (4) security is not good enough, as the ammonium polyphosphate intumescent flame retardent, in fire foams fire-retardant process, produces a large amount of ammonias and flue gas, reduces the oxygen in the tunnel space, and having increases the danger that disaster affected people is suffocated in the tunnel, increases the difficulty that fire-fighting fights a fire.
Summary of the invention
The objective of the invention is to overcome the defective that the existing tunnel frie retardant coating exists, a kind of water tolerance, weathering resistance, resistivity against fire, erosion resistance and excellent in stability are provided, the cohesive strength height, safety non-toxic, set time is short, the fire-proof coating for tunnels that operating efficiency is high.
The objective of the invention is to realize by following proposal:
The present invention's fire-proof coating for tunnels dry powder main ingredient comprises aluminosulfate cement binding agent, inorganic thermal insulating filling, re-dispersible glue powder, water reducer;
In case of necessity, also can add expanding fire retardant; Perhaps add fortifying fibre again or/and suitable adjuvants;
Described aluminosulfate cement can be low-alkalinity sulphoaluminate cement, quick hardening sulphoaluminate cement, composite sulfur aluminate cement, export-oriented sulfoaluminate clinker powder or self-stress aluminum sulfate cement, and label can be 32.5
#～72.5
#Between select, weight proportion is 30%～50%;
The weight proportion of described inorganic thermal insulating filling is: pearlstone 5～30%, expanded vermiculite 13～40%, kaolin 5～1 5%, aluminium hydroxide 5～20%, magnesium hydroxide 0～25%, diatomite 0～3%, slag 0～10%;
Re-dispersible glue powder is mainly used in and improves the execution of coating performance, and as viscosity and cohesive strength, weight proportion is: 2～10%;
Described water reducer is known water reducer commonly used, and weight proportion is: 0.1～2%;
Described expanding fire retardant can be one or more the mixture in trimeric cyanamide, tetramethylolmethane, the ammonium dichromate, preferred version is the mixture of trimeric cyanamide, tetramethylolmethane, three kinds of materials of ammonium dichromate, preferred scheme is that the weight proportion of described three's mixture is: trimeric cyanamide: tetramethylolmethane: ammonium dichromate=3: 2: 1; The weight proportion of described expanding fire retardant is 0～1%.
Described fortifying fibre can be an aluminosilicate short fiber, also can be the alkali-proof glass staple fibre, staple glass fibre, vinylon staple fibre, polypropene staple or lignocellulose; The weight proportion of described fortifying fibre is 0～1%.
Described auxiliary agent can be retardant (as boric acid), and hot weather construction is used with coating; Or be accelerating chemicals, as unslaked lime, Quilonum Retard, winter construction is used with coating; Consumption is: boric acid 0～5%, Quilonum Retard 0～3%, unslaked lime 0～3%; The coating surface drying time can by selecting to add the kind and the quantity of auxiliary agent, be regulated arbitrarily as required.
Production technique:
The production technique of described fire-proof coating for tunnels is: measuring raw materials, mixing, packing promptly get tunnel fire proofing and do mixed coating powder.
Use: tunnel fire proofing is done and is mixed the coating powder: water=1.0: 0.65～0.9.
The present invention's fire-proof coating for tunnels water tolerance, weathering resistance, resistivity against fire, erosion resistance and excellent in stability, the cohesive strength height, safety non-toxic, set time is short, easy construction, efficient height.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
52.5
#Low-alkalinity sulphoaluminate cement 35kg, pearlstone 13kg, expanded vermiculite 26kg, kaolin 13kg, aluminium hydroxide 13kg, re-dispersible glue powder 8.1kg, trimeric cyanamide 5kg, tetramethylolmethane 5kg, water reducer 0.2kg, thorough mixing is even, promptly becomes the present invention's fire-proof coating for tunnels dry powder.Add 79.4kg water and stir, performance test results sees Table 1.
Embodiment 2
Hot weather construction is used: 42.5
#Quick hardening sulphoaluminate cement 40kg, pearlstone 12kg, expanded vermiculite 24kg, kaolin 12kg, aluminium hydroxide 8kg, trimeric cyanamide 4kg, tetramethylolmethane 4kg, re-dispersible glue powder 2kg, magnesium hydroxide 6kg, water reducer 0.2kg, auxiliary agent (boric acid) 0.5kg, the starting material thorough mixing is even.Add 76.3kg water and stir, performance test results sees Table 1.
Embodiment 3
Hot weather construction is used: 52.5
#Composite sulfur aluminate cement 30kg, pearlstone 20kg, expanded vermiculite 35kg, kaolin 5kg, vinylon staple fibre 0.5kg, aluminium hydroxide 10kg, magnesium hydroxide 5kg, re-dispersible glue powder 10.2kg, water reducer 0.2kg, auxiliary agent (boric acid) 3kg, thorough mixing is even.Add 80.3kg water and stir, performance test results sees Table 1.
Embodiment 4
Winter construction is used: 52.5
#Export-oriented sulfoaluminate clinker powder 40kg, pearlstone 20kg, expanded vermiculite 25kg, kaolin 5kg, aluminium hydroxide 10kg, magnesium hydroxide 0kg, water reducer 0.2kg, re-dispersible glue powder 8.2kg, auxiliary agent (unslaked lime) 0.4kg, thorough mixing is even.Add 86.5kg water and stir, performance test results sees Table 1.
Embodiment 5
Winter construction is used: 52.5
#Self-stress aluminum sulfate cement 40kg, pearlstone 20kg, expanded vermiculite 25kg, kaolin 5kg, aluminium hydroxide 10kg, magnesium hydroxide 0kg, water reducer 0.2kg, re-dispersible glue powder 8.6kg, auxiliary agent (Quilonum Retard) 0.4kg, the starting material thorough mixing is even.Add 83.5kg water and stir, performance test results sees Table 1.
Embodiment 6
Hot weather construction is used: 52.5
#Low-alkalinity sulphoaluminate cement 35kg, pearlstone 20kg, expanded vermiculite 30kg, slag 10kg, aluminium hydroxide 8kg, magnesium hydroxide 6kg, re-dispersible glue powder 8kg, water reducer 0.2kg, auxiliary agent (boric acid) 0.5kg, staple glass fibre 0.4kg, thorough mixing is even.Add 86kg water and stir, performance test results sees Table 1.
Embodiment 7
Winter construction is used: 62.5
#Quick hardening sulphoaluminate cement 30kg, pearlstone 20kg, expanded vermiculite 35kg, kaolin 5kg, alkali-proof glass staple fibre 0.5kg, aluminium hydroxide 10kg, magnesium hydroxide 5kg, re-dispersible glue powder 10.2kg, water reducer 1.0kg, auxiliary agent (unslaked lime) 0.4kg, the starting material thorough mixing is even.Add 80kg water and stir, performance test results sees Table 1.
Embodiment 8
Hot weather construction is used: 72.5
#Quick hardening sulphoaluminate cement 30kg, pearlstone 20kg, expanded vermiculite 35kg, kaolin 10kg, diatomite 2kg, alkali-proof glass staple fibre 0.5kg, boric acid 0.3kg, aluminium hydroxide 8kg, magnesium hydroxide 2kg, re-dispersible glue powder 8kg, water reducer 0.8kg, the starting material thorough mixing is even.Add 86kg water and stir, performance test results sees Table 1.
Embodiment 9
Winter construction is used: 32.5
#Low-alkalinity sulphoaluminate cement 50kg, pearlstone 15kg, expanded vermiculite 30kg, kaolin 10kg, diatomite 3kg, alkali-proof glass staple fibre 2kg, aluminium hydroxide 10kg, magnesium hydroxide 1kg, re-dispersible glue powder 10kg, water reducer 1.0kg, Quilonum Retard 0.2kg, the starting material thorough mixing is even.Add 80kg water and stir, performance test results sees Table 1.
Table 1 fire-proof coating for tunnels performance test results
| Test item | Performance index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 |
| State in container (powdery) | Stiff fluid after adding water and stirring | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| Surface drying time (h) | ≤24 | 6.0 | 6.0 | 7.5 | 5.5 | 6.0 | 6.0 | 6.5 | 6.0 | 6.2 |
| Cohesive strength (MPa) | ≥0.05 | 0.8 | 0.8 | 0.8 | 0.8 | 0.82 | 1.0 | 0.7 | 0.9 | 0.7 |
| Density (kg/m 3) | ≤680 | 640 | 640 | 635 | 635 | 680 | 590 | 590 | 580 | 680 |
| Ultimate compression strength (MPa) | ≥1.2 | 1.2 | 1.25 | 1.33 | 1.95 | 1.40 | 1.5 | 1.2 | 1.0 | 1.2 |
| Thermal conductivity (W/mk) | ≤0.116 | 0.108 | 0.109 | 0.108 | 0.107 | 0.114 | 0.115 | 0.105 | 0.108 | 0.109 |
| Water resistance (h) | 〉=24h coating does not ftracture, and non-scale does not come off | 80 | 82 | 75 | 80 | 84 | 100 | 80 | 80 | 80 |
| Alkaline resistance properties (h) | After the 24h test, coating does not ftracture, and non-scale does not come off, and allows slightly to swell and variable color | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| Test item | Performance index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 |
| Cold-resistant thermal cycling (inferior) | 〉=15 do not ftracture, and do not come off | 30 | 30 | 30 | 30 | 30 | 30 | 25 | 29 | 20 |
| Fire performance (h) | Coat-thickness (20mm) fire endurance | 3.0 | 3.5 | 3.2 | 3.1 | 3.2 | 3.2 | 3.1 | 3.0 | 3.1 |
Claims (10)
1. fire-proof coating for tunnels, comprise binding agent cement, inorganic thermal insulating filling, water reducer is characterized in that, also contains re-dispersible glue powder, described cement is aluminosulfate cement, described inorganic thermal insulating filling component is a pearlstone, expanded vermiculite, kaolin, aluminium hydroxide, magnesium hydroxide, diatomite, slag, the weight percent of described each component is: aluminosulfate cement 30%～50%, pearlstone 5～30%, expanded vermiculite 13～40%, kaolin 5～15%, aluminium hydroxide 5～20%, magnesium hydroxide 0～25%, diatomite 0～3%, slag 0～10%, re-dispersible glue powder 2～10%, water reducer 0.1～2%.
2. fire-proof coating for tunnels according to claim 1, it is characterized in that, described aluminosulfate cement is low-alkalinity sulphoaluminate cement, quick hardening sulphoaluminate cement, composite sulfur aluminate cement, export-oriented sulfoaluminate clinker powder or self-stress aluminum sulfate cement, and label is 32.5
#～72.5
#
3. fire-proof coating for tunnels according to claim 1 and 2 is characterized in that, also contains one or more the mixture in expanding fire retardant trimeric cyanamide, tetramethylolmethane, the ammonium dichromate, and the weight percent proportioning of described expanding fire retardant is 0～1%.
4. fire-proof coating for tunnels according to claim 3 is characterized in that, the weight proportion of described trimeric cyanamide, tetramethylolmethane, ammonium dichromate is: trimeric cyanamide: tetramethylolmethane: ammonium dichromate=3: 2: 1.
5. fire-proof coating for tunnels according to claim 1 and 2 is characterized in that, also contains fortifying fibre, and the weight proportion of described fortifying fibre is 0～1%.
6. fire-proof coating for tunnels according to claim 3 is characterized in that, also contains fortifying fibre, and the weight proportion of described fortifying fibre is 0～1%.
7. fire-proof coating for tunnels according to claim 5 is characterized in that, described fortifying fibre is an aluminosilicate short fiber, staple glass fibre, vinylon staple fibre, polypropene staple or lignocellulose.
8. fire-proof coating for tunnels according to claim 1 and 2 is characterized in that, also contains auxiliary agent retardant or accelerating chemicals, and retardant content is weight percentage 0～5%; Accelerating chemicals content is weight percentage 0～3%.
9. fire-proof coating for tunnels according to claim 3 is characterized in that, also contains auxiliary agent retardant or accelerating chemicals, and retardant content is weight per distribution ratio 0～5%, and accelerating chemicals content is weight per distribution ratio 0～3%.
10. fire-proof coating for tunnels according to claim 5 is characterized in that, also contains auxiliary agent retardant or accelerating chemicals, and retardant content is weight per distribution ratio 0～5%, and accelerating chemicals content is weight per distribution ratio 0～3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100358596A CN101134854B (en) | 2007-10-08 | 2007-10-08 | Tunnel fire-proof paint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100358596A CN101134854B (en) | 2007-10-08 | 2007-10-08 | Tunnel fire-proof paint |
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| CN101134854A CN101134854A (en) | 2008-03-05 |
| CN101134854B true CN101134854B (en) | 2010-10-27 |
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| CN2007100358596A Expired - Fee Related CN101134854B (en) | 2007-10-08 | 2007-10-08 | Tunnel fire-proof paint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT515368A1 (en) * | 2014-02-03 | 2015-08-15 | Geolyth Mineral Technologie Gmbh | Mineral formulation |
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- 2007-10-08 CN CN2007100358596A patent/CN101134854B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| AT515368A1 (en) * | 2014-02-03 | 2015-08-15 | Geolyth Mineral Technologie Gmbh | Mineral formulation |
| AT515368B1 (en) * | 2014-02-03 | 2016-06-15 | Geolyth Mineral Tech Gmbh | Mineral formulation |
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