CN103059592A - 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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Abstract
The invention provides an environment-friendly flame-retardant asphalt which is prepared from the following raw materials in parts by weight: 100 parts of asphalt, 2-10 parts of medical stone, 10-20 parts of metal hydroxide, 3-6 parts of smoke suppressor and 5-15 parts of coupling agent solution. The invention also provides a preparation method of the flame-retardant asphalt, which comprises the following steps: 1. drying the medical stone, pulverizing, and screening to obtain medical stone powder; 2. adding the metal hydroxide, smoke suppressor and medical stone powder into the coupling agent solution, stirring, and drying to obtain a mixture; 3. heating asphalt, and adding the mixture; and 4. carrying out low-speed shearing and high-speed shearing with a shearing machine, thereby obtaining the environment-friendly flame-retardant asphalt. The environment-friendly flame-retardant provided by the invention has the obvious advantages of flame retardancy, smoke inhibition, environment-friendly additives, low production cost, simple preparation process and the like, can obviously lower the oxygen index of the asphalt, and can effectively improve the safety performance of the tunnel asphalt pavement.
Description
Technical field
The invention belongs to the pavement material technical field, be specifically related to a kind of environmental protection flame-retardant asphalt and preparation method thereof.
Background technology
Along with the fast development of domestic motorway, vcehicular tunnel is also built more and more.The tunnel construction technology has obtained development in an all-round way, but the research of paving material and technical elements is also relatively less in the tunnel.Bituminous pavement is because driving is comfortable, and noise is low, and sliding resistance is good, and the advantages such as easy-maintaining are applied in the tunnel road surface just more and more.But because pitch is inflammable material, meet naked light, high heat is flammable, adds in the tunnel ventilation condition poor, catches fire if accident causes bituminous pavement, tends to cause larger loss of life and personal injury and property damage.In addition, when catching fire, pitch produces a large amount of toxic gases and dense smoke, thus life-threatening, and serious environment pollution.Therefore some researchs have been carried out on the flame-retardant pitch road surface both at home and abroad, also can have been reached the requirement of particular surroundings road pavement in the tunnel when making bituminous pavement give full play to its own advantages.The road fire-resistant agent of use is various in style now, mainly can be summarized as two large classes: organic fire-retardant and inorganic combustion inhibitor, organic fire-retardant are divided into again phosphorus system and halogen is two series; Inorganic combustion inhibitor mainly contains fire retardant commonly used nitrogen system, antimony compounds class (such as antimonous oxide), boron compound class (such as zinc borate), magnesium compound class (such as magnesium hydroxide) etc.Halogen containing flame-retardant although can play to a certain extent the flame-retardant smoke inhibition effect, also exists the shortcomings such as degradation production toxicity is large, smog is large for being mainly used in now the fire retardant of tunnel road simultaneously; And the single flame retardant effect of inorganic combustion inhibitor commonly used is relatively poor.So from environmental protection and fire-retardant two aspects, in the urgent need to developing a kind of novel environment friendly flame-retardant pitch with flame-retardant smoke inhibition function.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of environmental protection flame-retardant asphalt for above-mentioned the deficiencies in the prior art.The remarkable advantages such as this flame-retardant pitch has flame-retardant smoke inhibition, additive environmental protection, production cost is low, preparation is simple can significantly reduce Investigation of Asphalt Oxygen-index, can be used as the technical problem that a kind of novel environment friendly fire-retardant modified asphalt is used for improving the tunnel sheet pavement safety performance
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of environmental protection flame-retardant asphalt is characterized in that, raw material by following weight part is made: 100 parts of pitches, 2～10 parts of medical stones, 10～20 parts of metal hydroxidess, 3～6 parts of smoke suppressors, 5～15 parts of coupling agent solutions; Described metal hydroxides is aluminium hydroxide or magnesium hydroxide, and described smoke suppressor is calcium oxide, described coupling agent solution by titanate coupling agent and solvent in mass ratio 1 ︰ 4～5 be mixed, described solvent is methyl alcohol, ethanol or deionized water.
Above-mentioned a kind of environmental protection flame-retardant asphalt is characterized in that, is made by the raw material of following weight part: 100 parts of pitches, 3～8 parts of medical stones, 12～18 parts of metal hydroxidess, 3～5 parts of smoke suppressors, 8～12 parts of coupling agent solutions.
Above-mentioned a kind of environmental protection flame-retardant asphalt is characterized in that, is made by the raw material of following weight part: 100 parts of pitches, 6 parts of medical stones, 15 parts of metal hydroxidess, 4 parts of smoke suppressors, 10 parts of coupling agent solutions.
Above-mentioned a kind of environmental protection flame-retardant asphalt is characterized in that, described pitch is bi tumenf orr oad, SBS modifying asphalt or rubber modified asphalt.
In addition, the present invention also provides a kind of method for preparing above-mentioned environmental protection flame-retardant asphalt, it is characterized in that, the method may further comprise the steps:
Step 1, with medical stone successively through super-dry, the processing of pulverizing and sieve, obtain medical stone powder;
Step 2, medical stone powder described in metal hydroxides, smoke suppressor and the step 1 added in the coupling agent solution together stir, then place loft drier dry, obtain mixture;
Step 3, be 140 ℃～180 ℃ with asphalt heating to temperature, then add mixture described in the step 2 in the pitch after the heating;
Step 4, to adopt high-speed shearing machine be low velocity shear 10min～20min under the condition of 1500r/min in shearing rate at first with the pitch that is added with mixture in the step 3, then be high speed shear 25min～40min under the condition of 4500r/min～5500r/min in shearing rate, obtain environmental protection flame-retardant asphalt.
Above-mentioned method is characterized in that, the median size of medical stone powder described in the step 1 is not more than 200 μ m.
Above-mentioned method is characterized in that, the speed that stirs described in the step 2 is 200r/min～500r/min, and the time of described stirring is 1h～1.5h.
Above-mentioned method is characterized in that, temperature dry described in the step 2 is 60 ℃～80 ℃, and the time of described drying is 3h～4h.
Described weight part can be the weight metering units such as gram, two, jin, kilogram, ton.
The present invention compared with prior art has the following advantages:
The remarkable advantages such as 1, environmental protection flame-retardant asphalt of the present invention has flame-retardant smoke inhibition, additive environmental protection, production cost is low, preparation is simple, can significantly reduce Investigation of Asphalt Oxygen-index, can be used as the technical problem that a kind of novel environment friendly fire-retardant modified asphalt is used for improving the tunnel sheet pavement safety performance.
3, to adopt pitch, medical stone, metal hydroxides, smoke suppressor and coupling agent solution be that raw material prepares environmental protection flame-retardant asphalt in the present invention, wherein the fire retardant mechanism of medical stone is under the hot conditions of pitch burning, medical stone can act on the gaseous combustion district, catch the free radical in the combustion reactions, thereby prevention flame transmission, the flame density of combustion zone is descended, combustion velocity is descended until stop; Medical stone powder has spongy porous special construction, internal surface is large, have very strong adsorption and exchange interaction, can adsorb the gas phase combustiblematerials of preignition zone existence and the glance coal that burning produces, stop generation and the discharging of the burning of combustiblematerials sustainable participation and reduction glance coal, thereby reach fire-retardant double effects with pressing down cigarette; Simultaneously medical stone powder belongs to pure inorganic micro powder based flame retardant, and nontoxic, repeating utilization factor is higher, and sustainable use, and cheap is originated and is widely used; Metal hydroxides can play the effect of promotion and cooperative flame retardant, improves flame retarding efficiency; Smoke suppressor can play the auxiliary hood that presses down; Coupling agent solution has improved dispersiveness to the surface modification of asphalt flame-retardant agent, reduces its wetting ability, thereby improves the consistency between inorganic combustion inhibitor and the pitch.
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment
Embodiment 1
The present embodiment environmental protection flame-retardant asphalt is made by the raw material of following weight part: 100 parts of pitches, 6 parts of medical stones, 15 parts of metal hydroxidess, 4 parts of smoke suppressors, 10 parts of coupling agent solutions; Described pitch is bi tumenf orr oad; Described metal hydroxides is aluminium hydroxide, and described smoke suppressor is calcium oxide, described coupling agent solution by titanate coupling agent and solvent in mass ratio 1 ︰ 4 be mixed, described solvent is methyl alcohol; Described weight part can be the weight metering units such as gram, two, jin, kilogram, ton, the bi tumenf orr oad that described bi tumenf orr oad can adopt Shandong treasure profit pavement material company limited to produce, the titanate coupling agent that described titanate coupling agent can adopt green chemical industry auxiliary reagent factory, Tianzhang City to produce.
The preparation method of the present embodiment environmental protection flame-retardant asphalt may further comprise the steps:
Step 1, with medical stone successively through super-dry, the processing of pulverizing and sieve, obtain medical stone powder; The median size of described medical stone powder is 100 μ m;
Step 2, add together medical stone powder described in metal hydroxides, smoke suppressor and the step 1 in the coupling agent solution, be to stir 1h under the condition of 300r/min in stir speed (S.S.), then placing loft drier, is dry 4h under 60 ℃ the condition in temperature, obtains mixture;
Step 3, be 150 ℃ with asphalt heating to temperature, then add mixture described in the step 2 in the pitch after the heating;
Step 4, to adopt high-speed shearing machine be low velocity shear 15min under the condition of 1500r/min in shearing rate at first with the pitch that is added with mixture in the step 3, then be high speed shear 30min under the condition of 5000r/min in shearing rate, obtain environmental protection flame-retardant asphalt.
Embodiment 2
The present embodiment environmental protection flame-retardant asphalt is made by the raw material of following weight part: 100 parts of pitches, 5 parts of medical stones, 10 parts of metal hydroxidess, 3 parts of smoke suppressors, 5 parts of coupling agent solutions; Described pitch is bi tumenf orr oad; Described metal hydroxides is magnesium hydroxide, and described smoke suppressor is calcium oxide, described coupling agent solution by titanate coupling agent and solvent in mass ratio 1 ︰ 5 be mixed, described solvent is ethanol; Described weight part can be the weight metering units such as gram, two, jin, kilogram, ton; The titanate coupling agent that the bi tumenf orr oad that described bi tumenf orr oad can adopt Hengshui Supreme Being hundred million petrochemical complex company limiteds to produce, described titanate coupling agent can adopt the peaceful coupling agent of Nanjing product company limited to produce.
The preparation method of the present embodiment environmental protection flame-retardant asphalt may further comprise the steps:
Step 1, with medical stone successively through super-dry, the processing of pulverizing and sieve, obtain medical stone powder; The median size of described medical stone powder is 200 μ m;
Step 2, add together medical stone powder described in metal hydroxides, smoke suppressor and the step 1 in the coupling agent solution, be to stir 1.5h under the condition of 250r/min in stir speed (S.S.), then placing loft drier, is dry 3h under 80 ℃ the condition in temperature, obtains mixture;
Step 3, be 140 ℃ with asphalt heating to temperature, then add mixture described in the step 2 in the pitch after the heating;
Step 4, to adopt high-speed shearing machine be low velocity shear 10min under the condition of 1500r/min in shearing rate at first with the pitch that is added with mixture in the step 3, then be high speed shear 40min under the condition of 5500r/min in shearing rate, obtain environmental protection flame-retardant asphalt.
Embodiment 3
The present embodiment environmental protection flame-retardant asphalt is made by the raw material of following weight part: 100 parts of pitches, 3 parts of medical stones, 12 parts of metal hydroxidess, 5 parts of smoke suppressors, 12 parts of coupling agent solutions; Described pitch is the SBS modifying asphalt; Described metal hydroxides is magnesium hydroxide, and described smoke suppressor is calcium oxide, described coupling agent solution by titanate coupling agent and solvent in mass ratio 1 ︰ 5 be mixed, described solvent is deionized water; Described weight part can be the weight metering units such as gram, two, jin, kilogram, ton; The titanate coupling agent that the SBS modifying asphalt that described SBS modifying asphalt can adopt Shanghai Qunkang Asphaltum Technology Co., Ltd. to produce, described titanate coupling agent can adopt green chemical industry auxiliary reagent factory, Tianzhang City to produce.
The preparation method of the present embodiment environmental protection flame-retardant asphalt may further comprise the steps:
Step 1, with medical stone successively through super-dry, the processing of pulverizing and sieve, obtain medical stone powder; The median size of described medical stone powder is 70 μ m;
Step 2, add together medical stone powder described in metal hydroxides, smoke suppressor and the step 1 in the coupling agent solution, be to stir 1.5h under the condition of 200r/min in stir speed (S.S.), then placing loft drier, is dry 3h under 80 ℃ the condition in temperature, obtains mixture;
Step 3, be 160 ℃ with asphalt heating to temperature, then add mixture described in the step 2 in the pitch after the heating;
Step 4, to adopt high-speed shearing machine be low velocity shear 20min under the condition of 1500r/min in shearing rate at first with the pitch that is added with mixture in the step 3, then be high speed shear 25min under the condition of 4500r/min in shearing rate, obtain environmental protection flame-retardant asphalt.
Embodiment 4
The present embodiment environmental protection flame-retardant asphalt is made by the raw material of following weight part: 100 parts of pitches, 8 parts of medical stones, 18 parts of metal hydroxidess, 4 parts of smoke suppressors, 8 parts of coupling agent solutions; Described pitch is the SBS modifying asphalt; Described metal hydroxides is magnesium hydroxide, and described smoke suppressor is calcium oxide, described coupling agent solution by titanate coupling agent and solvent in mass ratio 1 ︰ 5 be mixed, described solvent is ionized water; Described weight part can be the weight metering units such as gram, two, jin, kilogram, ton; The titanate coupling agent that the SBS modifying asphalt that described SBS modifying asphalt can adopt Langfang refreshed highway material company limited to produce, described titanate coupling agent can adopt the peaceful coupling agent of Nanjing product company limited to produce.
The preparation method of the present embodiment environmental protection flame-retardant asphalt may further comprise the steps:
Step 1, with medical stone successively through super-dry, the processing of pulverizing and sieve, obtain medical stone powder; The median size of described medical stone powder is 30 μ m;
Step 2, add together medical stone powder described in metal hydroxides, smoke suppressor and the step 1 in the coupling agent solution, be to stir 1.5h under the condition of 500r/min in stir speed (S.S.), then placing loft drier, is dry 3.5h under 70 ℃ the condition in temperature, obtains mixture;
Step 3, be 150 ℃ with asphalt heating to temperature, then add mixture described in the step 2 in the pitch after the heating;
Step 4, to adopt high-speed shearing machine be low velocity shear 10min under the condition of 1500r/min in shearing rate at first with the pitch that is added with mixture in the step 3, then be high speed shear 30min under the condition of 5000r/min in shearing rate, obtain environmental protection flame-retardant asphalt.
Embodiment 5
The present embodiment environmental protection flame-retardant asphalt is made by the raw material of following weight part: 100 parts of pitches, 10 parts of medical stones, 10 parts of metal hydroxidess, 6 parts of smoke suppressors, 15 parts of coupling agent solutions; Described pitch is rubber modified asphalt; Described metal hydroxides is magnesium hydroxide, and described smoke suppressor is calcium oxide, described coupling agent solution by titanate coupling agent and solvent in mass ratio 1 ︰ 4 be mixed, described solvent is ethanol; Described weight part can be the weight metering units such as gram, two, jin, kilogram, ton; The titanate coupling agent that the rubber modified asphalt that described rubber modified asphalt can adopt Wenzhou state prosperous rubber modified asphalt company limited to produce, described titanate coupling agent can adopt green chemical industry auxiliary reagent factory, Tianzhang City to produce.
The preparation method of the present embodiment environmental protection flame-retardant asphalt may further comprise the steps:
Step 1, with medical stone successively through super-dry, the processing of pulverizing and sieve, obtain medical stone powder; The median size of described medical stone powder is 150 μ m;
Step 2, add together medical stone powder described in metal hydroxides, smoke suppressor and the step 1 in the coupling agent solution, be to stir 1.5h under the condition of 200r/min in stir speed (S.S.), then placing loft drier, is dry 4h under 65 ℃ the condition in temperature, obtains mixture;
Step 3, be 180 ℃ with asphalt heating to temperature, then add mixture described in the step 2 in the pitch after the heating;
Step 4, to adopt high-speed shearing machine be low velocity shear 15min under the condition of 1500r/min in shearing rate at first with the pitch that is added with mixture in the step 3, then be high speed shear 35min under the condition of 5000r/min in shearing rate, obtain environmental protection flame-retardant asphalt.
Embodiment 6
The present embodiment environmental protection flame-retardant asphalt is made by the raw material of following weight part: 100 parts of pitches, 2 parts of medical stones, 20 parts of metal hydroxidess, 3 parts of smoke suppressors, 5 parts of coupling agent solutions; Described pitch is rubber modified asphalt; Described metal hydroxides is magnesium hydroxide, and described smoke suppressor is calcium oxide, described coupling agent solution by titanate coupling agent and solvent in mass ratio 1 ︰ 4 be mixed, described solvent is methyl alcohol, ethanol or deionized water; Described weight part can be the weight metering units such as gram, two, jin, kilogram, ton; The titanate coupling agent that the rubber modified asphalt that described rubber modified asphalt can adopt Chongqing China Communications Construction Company Science Co., Ltd to produce, described titanate coupling agent can adopt the peaceful coupling agent of Nanjing product company limited to produce.
The preparation method of the present embodiment environmental protection flame-retardant asphalt may further comprise the steps:
Step 1, with medical stone successively through super-dry, the processing of pulverizing and sieve, obtain medical stone powder; The median size of described medical stone powder is 80 μ m;
Step 2, add together medical stone powder described in metal hydroxides, smoke suppressor and the step 1 in the coupling agent solution, be to stir 1.5h under the condition of 500r/min in stir speed (S.S.), then placing loft drier, is dry 3h under 80 ℃ the condition in temperature, obtains mixture;
Step 3, be 140 ℃ with asphalt heating to temperature, then add mixture described in the step 2 in the pitch after the heating;
Step 4, to adopt high-speed shearing machine be low velocity shear 18min under the condition of 1500r/min in shearing rate at first with the pitch that is added with mixture in the step 3, then be high speed shear 40min under the condition of 4500r/min in shearing rate, obtain environmental protection flame-retardant asphalt.
The environmental protection flame-retardant asphalt of the embodiment of the invention 1 to 6 preparation is all carried out penetration degree, ductility, softening temperature, the Performance Detection such as viscosity, wherein penetration test according to " highway engineering pitch and Asphalt Mixture Experiment rules " (JTJE20-2011) in T0604-2011 bar regulation carry out, ductility test foundation " highway engineering pitch and Asphalt Mixture Experiment rules " (JTJE20-2011) T0605-2011 bar regulation is carried out, softening point test according to " highway engineering pitch and Asphalt Mixture Experiment rules " (JTJE20-2011) in T0606-2011 bar regulation carry out, viscosity test according to " highway engineering pitch and Asphalt Mixture Experiment rules " (JTJE20-2011) in T0621-2011 bar regulation carry out.
The performance test data of the environmental protection flame-retardant asphalt of the embodiment of the invention 1 to 6 preparation sees Table 1.
The performance test data of the environmental protection flame-retardant asphalt of table 1 embodiment of the invention 1 to 6 preparation
As known from Table 1, the penetration degree of the environmental protection flame-retardant asphalt of the present invention preparation, softening temperature, ductility,
The performances such as viscosity all satisfy the specified requirement of highway engineering bi tumenf orr oad, and oxygen index is all greater than 23%, and smoke density is all less than 75, and the flue gas toxity grade safe one-level (ZA1) that all is as the criterion has reached the related request of country to fire retardant material.
The above only is preferred embodiment of the present invention, is not that the present invention is imposed any restrictions.Every any simple modification, change and equivalence of above embodiment being done according to the invention technical spirit changes, and all still belongs in the protection domain of technical solution of the present invention.
Claims (8)
1. an environmental protection flame-retardant asphalt is characterized in that, is made by the raw material of following weight part: 100 parts of pitches, 2～10 parts of medical stones, 10～20 parts of metal hydroxidess, 3～6 parts of smoke suppressors, 5～15 parts of coupling agent solutions; Described metal hydroxides is aluminium hydroxide or magnesium hydroxide, and described smoke suppressor is calcium oxide, described coupling agent solution by titanate coupling agent and solvent in mass ratio 1 ︰ 4～5 be mixed, described solvent is methyl alcohol, ethanol or deionized water.
2. a kind of environmental protection flame-retardant asphalt according to claim 1 is characterized in that, is made by the raw material of following weight part: 100 parts of pitches, 3～8 parts of medical stones, 12～18 parts of metal hydroxidess, 3～5 parts of smoke suppressors, 8～12 parts of coupling agent solutions.
3. a kind of environmental protection flame-retardant asphalt according to claim 2 is characterized in that, is made by the raw material of following weight part: 100 parts of pitches, 6 parts of medical stones, 15 parts of metal hydroxidess, 4 parts of smoke suppressors, 10 parts of coupling agent solutions.
4. according to claim 1,2 or 3 described a kind of environmental protection flame-retardant asphalts, it is characterized in that, described pitch is bi tumenf orr oad, SBS modifying asphalt or rubber modified asphalt.
5. a method for preparing such as environmental protection flame-retardant asphalt as described in the claim 1,2 or 3 is characterized in that, the method may further comprise the steps:
Step 1, with medical stone successively through super-dry, the processing of pulverizing and sieve, obtain medical stone powder;
Step 2, medical stone powder described in metal hydroxides, smoke suppressor and the step 1 added in the coupling agent solution together stir, then place loft drier dry, obtain mixture;
Step 3, be 140 ℃～180 ℃ with asphalt heating to temperature, then add mixture described in the step 2 in the pitch after the heating;
Step 4, to adopt high-speed shearing machine be low velocity shear 10min～20min under the condition of 1500r/min in shearing rate at first with the pitch that is added with mixture in the step 3, then be high speed shear 25min～40min under the condition of 4500r/min～5500r/min in shearing rate, obtain environmental protection flame-retardant asphalt.
6. method according to claim 5 is characterized in that, the median size of medical stone powder described in the step 1 is not more than 200 μ m.
7. method according to claim 5 is characterized in that, the speed that stirs described in the step 2 is 200r/min～500r/min, and the time of described stirring is 1h～1.5h.
8. method according to claim 5 is characterized in that, temperature dry described in the step 2 is 60 ℃～80 ℃, and the time of described drying is 3h～4h.
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| CN201310032753.6A CN103059592B (en) | 2013-01-28 | 2013-01-28 | Environment-friendly flame-retardant asphalt and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105968729A (en) * | 2016-07-18 | 2016-09-28 | 四川蜀羊防水材料有限公司 | Flame-retardant asphalt material |
| CN107286554A (en) * | 2017-06-28 | 2017-10-24 | 常州万博金属构件厂 | A kind of flame-retardant pitch and preparation method thereof |
| CN109401341A (en) * | 2018-08-23 | 2019-03-01 | 安徽建筑大学 | Low-fuming reinforced asphalt and preparation method thereof |
| CN114891358A (en) * | 2022-06-30 | 2022-08-12 | 上海仰胜新材料科技有限公司 | Environment-friendly modified fragrant asphalt |
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| CN1110671A (en) * | 1995-02-22 | 1995-10-25 | 叶以文 | Burning type carbon dioxide gas fertiliser stick |
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| CN105968729A (en) * | 2016-07-18 | 2016-09-28 | 四川蜀羊防水材料有限公司 | Flame-retardant asphalt material |
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| CN114891358A (en) * | 2022-06-30 | 2022-08-12 | 上海仰胜新材料科技有限公司 | Environment-friendly modified fragrant asphalt |
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|---|---|
| CN103059592B (en) | 2015-07-15 |
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