CN102453332A - Environment-friendly flame retardant asphalt and preparation method thereof - Google Patents
Environment-friendly flame retardant asphalt and preparation method thereof Download PDFInfo
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- CN102453332A CN102453332A CN2010105140109A CN201010514010A CN102453332A CN 102453332 A CN102453332 A CN 102453332A CN 2010105140109 A CN2010105140109 A CN 2010105140109A CN 201010514010 A CN201010514010 A CN 201010514010A CN 102453332 A CN102453332 A CN 102453332A
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- hydrotalcite
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Abstract
The invention discloses environment-friendly flame retardant asphalt and a preparation method thereof. The flame retardant asphalt comprises, by mass, 100 parts of base asphalt, 2 to 15 parts of a fire retardant and 0.5 to 5 parts of a surface modified nano-material hydrotalcite. The preparation method comprises the steps of adding the fire retardant and the nano-material hydrotalcite into the base asphalt at a temperature of 120 to 180 DEG C and carrying out stirring for uniform mixing. According to the invention, the composition of asphalt has good flame retardant performance; additives used in the invention are environment-friendly, cost little and have good stability; a preparation process is simple.
Description
Technical field
The present invention relates to a kind of flame retarding asphalt composition and preparation method thereof, specifically a kind of environmental-protection flame-retardant bituminous composition and preparation method thereof.
Background technology
Along with the development of China's expressway construction, the quantity of vcehicular tunnel is also in continuous increase.Commonly used rigidity cement concrete pavement in the tunnel also is flattened, flexible bituminous concrete pavement wear-resisting, low noise replaces gradually.In the use of tunnel sheet pavement, the fire safety problem of bituminous concrete pavement also more and more causes people's attention.Because pitch is inflammable material; It is poor to add in the tunnel ventilation condition, catch fire if occurrence of traffic accident causes bituminous pavement, because of intensity of a fire development swift and violent; Personnel have little time to evacuate and cause bigger loss of life and personal injury, will inevitably cause unnecessary loss to the country and people's lives and properties.In addition, produce a large amount of black smokes when pitch catches fire, in the tunnel, be difficult for diffusion, can hinder escape personnel's sight line and be prone to make the people to suffocate, both personnel were worked the mischief, again environment is caused severe contamination.So, at first must solve pitch and meet the fire burns problem, the amount of being fuming and toxic gas content when its less important reduction pitch burns.Therefore, using the flame-retardant pitch with flame retardant properties, smoke suppressing should be that tunnel road surface is used the bituminous developing direction from now on.
Solve pitch and meet the fire burns problem, the simplest method is in pitch, to add fire retardant.The amount of being fuming when reducing the pitch burning adds exactly with the relatively more effective way of toxic gas content and presses down fumicants.And Along with people's is more and more paid attention to environmental problem, and also more and more stricter to the requirement of flame retardant products, though halogenated flame retardant can provide higher oxygen index, owing to produce a large amount of smog and poisonous gas, halogen-free flameproof becomes development trend from now on gradually.Use decabromodiphenyl ethane, zinc borate and Antimony Trioxide: 99.5Min as fire retardant among the CN200610062960.6, belong to halogen flame, do not meet environmental protection requirement, the toxic gas of emitting also jeopardizes personnel safety.Halogenless fire retarded polymer modified asphalt among the CN200610019381.3 is to play fire-retardant effect through adding phosphorus system with the nitrogen flame retardant, but wherein but fumicants does not solve the pitch incendiary problem of being fuming.CN200610082139.0 has introduced a kind of halogen-free roadfire-resistant asphalt; Wherein fire retardant is melamine pyrophosphate salt, zinc borate and Marinco H, and for playing better smoke suppressing effect, this invention adds white lake when the mix mineral aggregate; Increase algorithm, be unfavorable for the carrying out of constructing.And because therefore the decomposition temperature lower (140-150 ℃) of white lake has also limited its application.
Summary of the invention
To the deficiency of prior art, the present invention provides a kind of environmental-protection flame-retardant pitch and preparation method thereof, and asphalt flame-retardant of the present invention, smoke suppressing effect are good, additive environmental protection, low, the Heat stability is good of cost, and preparation is simple.
Environmental-protection flame-retardant pitch of the present invention comprises by mass parts:
(1) basic asphalt: 100 parts
(2) fire retardant: 2-15 part
(3) surface-modified nano material water talcum: 0.5-5 part
Its medium pitch is confirmed required character according to the occasion of using, and can be common heavy-duty road petroleum pitch, as: AH-70 (No. 70, Esso; Below analogize), AH-90, AH-110; It also can be polymer modified asphalt; Like SBS modifying asphalt, SBR modifying asphalt, or other types polymer modified asphalt such as shoddy.The add-on of polymkeric substance confirms specifically that according to the performance requriements of modifying asphalt and the kind of polymkeric substance generally by quality, polymkeric substance accounts for 2%～10% of polymer modified asphalt.Polymer modified asphalt penetration degree is greater than 45 1/10mm.
Wherein fire retardant is halogen-free flame retardantss such as phosphorus system, nitrogen system, boron system, can be one or more the mixture in above-mentioned.Specifically like in zinc borate, Antimony Trioxide: 99.5Min, trimeric cyanamide, melamine phosphoric acid salt, the red phosphorus etc. one or more.
Wherein surface-modified nano material water talcum is as synergistic fire retardant, and the nano material hydrotalcite is the laminar nano hydrotalcite, and its granularity is generally 15～70nm, is preferably magnalium carbonate hydrotalcite, as is specially molecular formula for [Mg
1-xAl
x(OH)
2]
X+[(CO
3)
X/2]
X-MH
2O, x=0.2～0.33,0.1≤m≤0.8.
Wherein surface-modified nano material water talcum is the nano material hydrotalcite of coupling agent surface-treated; Coupling agent can be titanate coupling agent, Triple Pressed Stearic Acid, Triple Pressed Stearic Acid-rare-earth coupling agent or silane coupling agent etc.; Its effect is the surfactivity that improves magnesium aluminum-hydrotalcite, thereby improves the consistency between hydrotalcite and the pitch.The coupling agent consumption is 1%～15% of a nano material hydrotalcite weight, is preferably 4%～10%.Surface-modified nano material water talcum is that nano material hydrotalcite and coupling agent make after 50～90 ℃ of reactions through adding suitable quantity of water.
In the environmental-protection flame-retardant pitch of the present invention, can also add other additive according to the requirement of using, like viscosity modifier, penetration degree properties-correcting agent, inhibitor etc.
Environmental-protection flame-retardant bituminous preparation method of the present invention is following:
(1) nano material hydrotalcite, appropriate amount of deionized water and coupling agent are added reactor drum successively, 50～90 ℃ of constant temperature continue stirring reaction 0.3～3h, filter, and washing, drying makes the surface-treated hydrotalcite.
(2) fire retardant, surface-modified nano material water talcum are joined in 120-180 ℃ the pitch, mix 0.5～3h, obtain flame-retardant pitch.
When needing polymer modified asphalt, at first prepare polymer modified asphalt, then with preparing fire retarded polymer modified asphalt as stated above by this area ordinary method.
The present invention is directed to the deficiency of prior art; A kind of flame retarding asphalt composition and preparation method thereof is provided; It is fire retardant that this flame-retardant pitch is selected non-halogen compound for use; Select for use the surface-treated magnesium aluminum-hydrotalcite as synergistic fire retardant, utilize the character of the special effects and the hydrotalcite of its nano material, improved the bituminous flame retardant properties.In addition, when flame retardant effect is close, can significantly reduce the fire retardant add-on.The fire retardant properties-correcting agent cost that bituminous composition of the present invention uses is low, Heat stability is good, and fire-retardant good with smoke suppressing effect, preparation technology is simple, and is easy to operate.
Nano material hydrotalcite cooperative flame retardant mechanism: the existing low-temperature zone of the decomposition temperature of magnesium aluminum-hydrotalcite has high temperature section again, has widened the resistance combustion temperature scope.Slough planar water and middle water in the thermal endothermic decomposition process, and the hydroxyl dehydration is overflowed with the water vapour form on the laminate, and decompose the H that discharges
2O and CO
2, these have all absorbed burning mass heat and have effectively diluted O
2With the concentration of inflammable gas, reduced the composite material surface temperature, make it difficult combustion or slow down combustion processes, stop its further decomposition, play fire-retardant effect.In addition; The alkaline porous composite oxide that magnesium aluminum-hydrotalcite obtains after decomposing combines to form protective membrane with the carbonizing production of asphalt surface; Delay of the supply of the small molecules of polymer modified asphalt internal heat degraded generation effectively to surface transport, heat transmission capacity and extraneous oxygen; And its specific surface area is bigger, and adsorbable obnoxious flavour is sour gas especially, has fire-retardant and but cigarette double effects.Therefore, the modification magnesium aluminum-hydrotalcite can produce good synergistic effect with conventional flame retardant, and flame retardant property of asphaltum is improved.
Embodiment
Through embodiment the present invention is further specified below, but therefore do not limit the present invention.
Embodiment 1
Step 1: (granularity is 20～40nm), appropriate amount of deionized water and the titanate coupling agent NDZ-201 that accounts for hydrotalcite weight 5% add reactor drum successively, and 80 ℃ of waters bath with thermostatic control continue stirring reaction 1h with magnalium carbonate hydrotalcite; Filter; Washing, drying makes the surface-treated hydrotalcite.
Step 2: 3 parts of melamine phosphoric acid salt, 0.6 part of surface-treated hydrotalcite are joined in 100 parts of 160 ℃ of 4%SBS modifying asphalts, and common stirring (450rpm/min) mixes 1h, obtains fire-retardant SBS modifying asphalt.
Embodiment 2
Preparation surface-treated hydrotalcite method is with step 1 among the embodiment 1, and coupling agent is a Triple Pressed Stearic Acid, and consumption is 8% of a hydrotalcite weight.
6 parts of melamine phosphoric acid salt, 1.2 parts of surface-treated hydrotalcites are joined in 100 parts of 160 ℃ of SBS modifying asphalts, and common stirring (450rpm/min) mixes 1h, obtains fire-retardant SBS modifying asphalt.
Embodiment 3
Preparation surface-treated hydrotalcite method is with step 1 among the embodiment 1, and coupling agent is a silane coupling agent, and consumption is 10% of a hydrotalcite weight.
9 parts of melamine phosphoric acid salt, 1.8 parts of surface-treated hydrotalcites are joined in 100 parts of 160 ℃ of SBS modifying asphalts, and common stirring (450rpm/min) mixes 1h, obtains fire-retardant SBS modifying asphalt.
Embodiment 4
Preparation surface-treated hydrotalcite method is with step 1 among the embodiment 1.
12 parts of melamine phosphoric acid salt, 2.4 parts of surface-treated hydrotalcites are joined in 100 parts of 160 ℃ of SBS modifying asphalts, and common stirring (450rpm/min) mixes 1h, obtains fire-retardant SBS modifying asphalt.
Embodiment 5
Preparation surface-treated hydrotalcite method is with step 1 among the embodiment 1.
3 parts of zinc borates, 0.6 part of surface-treated hydrotalcite are joined in 100 parts of 160 ℃ of SBS modifying asphalts, and common stirring (450rpm/min) mixes 1h, obtains fire-retardant SBS modifying asphalt.
Embodiment 6
Preparation surface-treated hydrotalcite method is with step 1 among the embodiment 1.
6 parts of zinc borates, 1.2 parts of surface-treated hydrotalcites are joined in 100 parts of 160 ℃ of SBS modifying asphalts, and common stirring (450rpm/min) mixes 1h, obtains fire-retardant SBS modifying asphalt.
Embodiment 7
Preparation surface-treated hydrotalcite method is with step 1 among the embodiment 1.
9 parts of zinc borates, 1.8 parts of surface-treated hydrotalcites are joined among 100 parts of 160 ℃ of AH-90 (penetration degree 871/10mm, 48.5 ℃ of softening temperatures), and common stirring (450rpm/min) mixes 1h, obtains fire-retardant AH-70 pitch.
Embodiment 8
Preparation surface-treated hydrotalcite method is with step 1 among the embodiment 1.
12 parts of zinc borates, 2.4 parts of surface-treated hydrotalcites are joined among 100 parts of 140 ℃ of AH-110 (penetration degree 106 1/10mm, 44 ℃ of softening temperatures), and common stirring (450rpm/min) mixes 1h, obtains fire-retardant AH-90 pitch.
Comparative example 1
12 parts of melamine phosphoric acid salt are joined in 100 parts of 160 ℃ of SBS modifying asphalts, and common stirring (450rpm/min) mixes 1h, obtains fire-retardant SBS modifying asphalt.
Comparative example 2
12 parts of zinc borates are joined in 100 parts of 160 ℃ of AH-110 (penetration degree 1061/10mm, 44 ℃ of softening temperatures) pitch, and common stirring (450rpm/min) mixes 1h, obtains fire-retardant AH-90 pitch.
The fire-retardant SBS performance of modified bitumen of table 1 index
Table 2 flame-retardant pitch performance index
Can find out that from last table data along with the increase of nano material hydrotalcite add-on, the variation of softening temperature is little, ductility descends to some extent, and limiting oxygen index(LOI) is significantly improved.In addition, when flame retardant effect is close, can significantly reduce the fire retardant add-on, nano material hydrotalcite and other fire retardant have played good synergy, and good consistency is arranged between fire retardant and the basic asphalt.
Claims (10)
1. environmental-protection flame-retardant pitch is characterized in that comprising by mass parts:
(1) basic asphalt: 100 parts
(2) fire retardant: 2-15 part
(3) surface-modified nano material water talcum: 0.5-5 part.
2. according to the described flame-retardant pitch of claim 1, it is characterized in that: basic asphalt is common heavy-duty road petroleum pitch, perhaps is polymer modified asphalt, perhaps is waste rubber powder modified asphalt.
3. according to the described flame-retardant pitch of claim 2, it is characterized in that: in the polymer modified asphalt, by quality, polymkeric substance accounts for 2%～10% of polymer modified asphalt.
4. according to the described flame-retardant pitch of claim 1, it is characterized in that: fire retardant is that phosphorus system, nitrogen system or boron are halogen-free flame retardants, or one or more the mixture in above-mentioned.
5. according to claim 1 or 4 described flame-retardant pitchs, it is characterized in that: fire retardant is one or more in zinc borate, Antimony Trioxide: 99.5Min, trimeric cyanamide, melamine phosphoric acid salt, the red phosphorus.
6. according to the described flame-retardant pitch of claim 1, it is characterized in that: surface-modified nano material water talcum is as synergistic fire retardant, and the nano material hydrotalcite is the laminar nano hydrotalcite, and its granularity is 15～70nm.
7. according to the described flame-retardant pitch of claim 6, it is characterized in that: the nano material hydrotalcite is a magnalium carbonate hydrotalcite, is specially molecular formula and is [Mg
1-xAl
x(OH)
2]
X+[(CO
3)
X/2]
X-MH
2O, x=0.2～0.33,0.1≤m≤0.8.
8. according to the described flame-retardant pitch of claim 1, it is characterized in that: surface-modified nano material water talcum is the nano material hydrotalcite of coupling agent surface-treated, and coupling agent is titanate coupling agent, Triple Pressed Stearic Acid, Triple Pressed Stearic Acid-rare-earth coupling agent or silane coupling agent.
9. according to the described flame-retardant pitch of claim 8; It is characterized in that: the coupling agent consumption is 1%～15% of a nano material hydrotalcite weight; Be preferably 4%～10%, surface-modified nano material water talcum is that nano material hydrotalcite and coupling agent make after 50～90 ℃ of reactions through adding suitable quantity of water.
10. the said environmental-protection flame-retardant bituminous of claim 1 preparation method, process is following:
(1) nano material hydrotalcite, appropriate amount of deionized water and coupling agent are added reactor drum successively, 50～90 ℃ of constant temperature continue stirring reaction 0.3～3h, filter, and washing, drying makes the surface-treated hydrotalcite;
(2) fire retardant, surface-modified nano material water talcum are joined in 120-180 ℃ the pitch, mix 0.5～3h, obtain flame-retardant pitch.
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| CN102453332B CN102453332B (en) | 2014-05-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660048A (en) * | 2012-05-28 | 2012-09-12 | 河南现代交通道路科技有限责任公司 | Efficient flame retardant and flame-retardant smoke-suppressant asphalt |
| CN103265817A (en) * | 2013-06-03 | 2013-08-28 | 东南大学 | Method for preparing flame-retardant rubber modified emulsified asphalt |
| CN103289246A (en) * | 2013-06-21 | 2013-09-11 | 苏州市景荣科技有限公司 | Fire retardation PVC foaming sole material |
| CN103666259A (en) * | 2013-09-12 | 2014-03-26 | 宁波镭纳涂层技术有限公司 | Flame-retarding asphalt base mixing macromolecule waterproof paint and preparation method thereof |
| CN104387783A (en) * | 2014-12-13 | 2015-03-04 | 乔俊擎 | Flame-retardant asphalt for highway tunnel and preparation method of flame-retardant asphalt |
| CN105084797A (en) * | 2015-04-23 | 2015-11-25 | 广西华锑科技有限公司 | Antimony-based compound flame retardant for silicate fiberboard and preparation method thereof |
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| CN107304300A (en) * | 2016-04-21 | 2017-10-31 | 中国石油化工股份有限公司 | A kind of organic montmorillonite flame-retardant pitch and preparation method thereof |
| CN107795079A (en) * | 2016-08-30 | 2018-03-13 | 菊水化工（上海）有限公司 | Surface decoration material |
| CN108795286A (en) * | 2018-06-28 | 2018-11-13 | 芜湖市棠华建材科技有限公司 | Quick-dry type hammer paint |
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| CN108976962A (en) * | 2018-06-28 | 2018-12-11 | 芜湖市棠华建材科技有限公司 | High-temperature-resistant flame-retardant anti-rust paint |
| CN109187411A (en) * | 2018-08-23 | 2019-01-11 | 南京林业大学 | A kind of evaluation method of nano magnalium hydrotalcite to asphalt flame retardant effect |
| CN112778775A (en) * | 2020-12-30 | 2021-05-11 | 北京化工大学 | Ultraviolet aging resistant hydrotalcite asphalt master batch and preparation method thereof |
| CN112876871A (en) * | 2021-01-25 | 2021-06-01 | 南京朝科路桥工程技术有限公司 | Environment-friendly hot-mix asphalt mixture and preparation method thereof |
| CN114656825A (en) * | 2022-03-09 | 2022-06-24 | 青岛爱尔家佳新材料股份有限公司 | Flame-retardant polyurea for new energy automobile and preparation method thereof |
| CN114836048A (en) * | 2021-12-22 | 2022-08-02 | 重庆交通大学 | Halloysite nanotube synergistic flame-retardant modified asphalt and preparation method thereof |
| CN115139624A (en) * | 2022-05-30 | 2022-10-04 | 广州至城建筑材料科技有限公司 | High-temperature-resistant asphalt waterproof coiled material and preparation method thereof |
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| CN103265817A (en) * | 2013-06-03 | 2013-08-28 | 东南大学 | Method for preparing flame-retardant rubber modified emulsified asphalt |
| CN103289246A (en) * | 2013-06-21 | 2013-09-11 | 苏州市景荣科技有限公司 | Fire retardation PVC foaming sole material |
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