CN102532921B - Efficient and flame-retardant modified asphalt and preparation process thereof - Google Patents
Efficient and flame-retardant modified asphalt and preparation process thereof Download PDFInfo
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- CN102532921B CN102532921B CN201010618328.1A CN201010618328A CN102532921B CN 102532921 B CN102532921 B CN 102532921B CN 201010618328 A CN201010618328 A CN 201010618328A CN 102532921 B CN102532921 B CN 102532921B
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- retardant
- hydrotalcite
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Abstract
The invention discloses modified asphalt and a preparation method thereof. The preparation method comprises the following steps: (1) preparing raw materials according to the following weight ratio: 80-100 of matrix asphalt, 3-12 of rubber compound modifier, 2-4 of organic flame retardant and 3-6 of inorganic flame retardant; (2) melting the matrix asphalt, adding the rubber compound modifier, mixing, and shearing to prepare the sheared and mixed asphalt; (3) mixing the sheared and mixed asphalt and the inorganic flame retardant and carrying out first swelling; and (4) adding the organic flame retardant, mixing and carrying out second swelling to prepare the modified asphalt. The efficient and flame-retardant modified asphalt prepared in the method has high flame retardant efficiency, and the flame retardants added in the efficient and flame-retardant modified asphalt are non-toxic and harmless compound flame retardants.
Description
Technical field
The present invention relates to a kind of bituminous material, relate in particular to a kind of highly effective flame-retardant modified asphalt material.
Background technology
Development along with China's economic construction, especially in recent years China's expressway construction developed rapidly, driven the development of China's tunnel construction and other infrastructure constructions, for example China has built up the first in the world seat tunneling undersea highway tunnel-Xiamen Xiang peace vcehicular tunnel, total length 6500m, all build seabed in.Also development simultaneously that driven military foundation to build, comprise army's barracks road, war preparedness transport routes, machine nest transport routes, cave depot road, shipping harbour is mated formation etc., the construction of these roads is mostly to mat formation with bituminous material, these pavement of road not only desired strength and sliding resistance high, comfortableness is good, also must possess higher fire resistance, because these sections are occurring under special status, just can fire hazard, the pitch of surface layer of mating formation participates in burning, produce a large amount of dense smoke, give rescue work, personnel escape, sending material out brings very big difficulty, can cause more serious loss.Therefore avoiding the generation of road bitumen material fire when there is war, burst natural disaster, is one of key content of Road construction.The prevention technique of asphalt roads fire failure is complicated, and oneself classifies important problem as through the research that tunnel asphalt fire is prevented and treated many countries.
The composition of pitch is extremely complicated, it is generally acknowledged that pitch is comprised of bituminous matter, colloid, aromatic hydrocarbon and four components of stable hydrocarbon.Therefore, pitch is in fact the extremely complicated polymer composite of a kind of composition.Because macromolecular material flame-retarded technology has now developed into the science of a comparative maturity, so, use for reference flame-retarded technology in the successful experience of field of polymer technology application, studied successfully the fire-retardant modified asphalt technology being applied in pitch.The good flame retardant properties of fire-retardant modified asphalt can greatly reduce personnel and the financial loss of bringing due to road surface fire.
Publication number is that the Chinese patent of CN 1569963A discloses a kind of antiflaming asphalt mixture about using in tunnel, and its production technique is mainly in pitch, to add brominated flame retardant and metal oxide.Because brominated flame retardant belongs to highly toxic substance, oneself is clearly defined in a lot of fields forbidding or limits the use of in the world; And the consistency of metal oxide and pitch is very poor, easily segregation, affects asphalt quality.
Summary of the invention
Object of the present invention is exactly the problem existing in order to overcome above-mentioned prior art, and a kind of highly effective flame-retardant modified asphalt material is provided, and the fire retardant adding in this highly effective flame-retardant modified asphalt material is nontoxic composite flame-retardant agent, and flame retarding efficiency is high.
For realizing object of the present invention, provide following technical scheme:
A kind of highly effective flame-retardant modifying asphalt comprises raw material: matrix pitch, rubber and plastic composite modifier, organic fire-retardant, inorganic combustion inhibitor.
Wherein, the weight part proportioning of raw material is: matrix pitch 80～100, rubber and plastic composite modifier 3～12, organic fire-retardant 2～4, inorganic combustion inhibitor 3～6.
Particularly, inorganic combustion inhibitor comprises hydrotalcite, linking agent, stablizer.
Wherein, the weight part proportioning of described hydrotalcite, linking agent, stablizer is: hydrotalcite 3～50, stablizer 3～10, linking agent 2～10.
Particularly, described hydrotalcite is one or more in Mg-Al hydrotalcite, Zn-Al hydrotalcite, Cr-Al hydrotalcite; And Mg in hydrotalcite
2+or Zn
2+or Cr
2+, Al
3+, CO
3 2-/ OH
-mol ratio be 6～8: 3～5: 1～3; Or Mg
2+, Zn
2+, Cr
2+three or arbitrarily both combination and Al
3+, CO
3 2-/ OH
-mol ratio be 6～8: 3～5: 1～3.
Particularly, described linking agent is epoxy resin and/or polypentaerythritol; Stablizer is that glycerin fatty acid ester, lipid acid sorb are smooth, one or more in polysorbate or fatty alcohol-polyoxyethylene ether.
Especially, glycerin fatty acid ester is nine contracting ten glycerine four oleic acid esters, a kind of in two triglycerol monostearates or two triglycerol monoleates; Lipid acid sorb smooth (being sapn) is span 40 or sorbester p18; A kind of in polysorbas20, polysorbate60 or tween 80 of polysorbate (being tween).
Wherein, organic fire-retardant is selected one or more in triaryl phosphate, Tritolyl Phosphate, phosphotriester, polyphosphoric acid amine condensed phosphoric acid esters, haplotype phosphoric acid ester, halogen-containing haplotype phosphoric acid ester and condensed type phosphoric acid ester.
Wherein, rubber and plastic composite modifier is selected two or more in styrene-butadiene-styrene block copolymer (SBS), polyethylene (PE), ethylene-vinyl acetate copolymer (EVA), rubber.
Particularly, the model of SBS is 4303, and Yanshan Petrochemical is produced; PE is hp-ldpe.
Particularly, matrix pitch is attached most importance to and is handed over a kind of in 70# pitch, 90# pitch or 100# pitch.
The present invention also provides a kind of preparation method of modifying asphalt on the other hand, comprises the step of carrying out as follows:
(1) according to following weight part proportioning, prepare raw material
Matrix pitch 80～100
Rubber and plastic composite modifier 3～12
Organic fire-retardant 2～4
Inorganic combustion inhibitor 3～6
(2) matrix pitch is melted, after adding rubber and plastic composite modifier to stir, carries out shearing treatment,
Make and shear mixing pitch;
(3) by shearing mixing pitch, mix with inorganic combustion inhibitor, stir, carry out swelling treatment for the first time;
(4) add organic fire-retardant, stir, carry out swelling treatment for the second time, obtain.
Wherein, matrix pitch described in step (2) is 110 ℃～130 ℃ thawings; Mixing speed is 600～800 revs/min, and whipping temp is 165 ℃～175 ℃, and churning time is 30～50 minutes; Described in step (2), the frequency of shearing treatment is 1500～1800 beats/min; The time of shearing treatment is 45-60 minute, and temperature is 160 ℃～180 ℃; In step (3), the time of swelling treatment is 30～40 minutes for the first time, and mixing speed is 600～800 revs/min; In step (4), the time of swelling treatment is 20～35 minutes for the second time, and mixing speed is 600～800 revs/min.
Particularly, matrix pitch described in step (1) is attached most importance to and is handed over a kind of in 70# pitch, 90# pitch or 100# pitch; Described rubber and plastic composite modifier is selected two or more in styrene-butadiene-styrene block copolymer, polyethylene, ethylene-vinyl acetate copolymer, rubber; Described organic fire-retardant is selected one or more in triaryl phosphate, Tritolyl Phosphate, phosphotriester, polyphosphoric acid amine condensed phosphoric acid esters, haplotype phosphoric acid ester, halogen-containing haplotype phosphoric acid ester and condensed type phosphoric acid ester; Described inorganic combustion inhibitor is comprised of hydrotalcite, linking agent, stablizer.
Particularly, the step that described in step (1), inorganic combustion inhibitor carries out is in the following order prepared from:
1) according to following weight part proportioning, prepare raw material:
Hydrotalcite 3～50; Stablizer 3～10; Linking agent 2～10
2) hydrotalcite is mixed with ionized water, stir, form hydrotalcite suspension liquid;
3) after hydrotalcite suspension liquid staticly settles, in precipitation, add linking agent, stir;
4) add stablizer, stir and be warming up to 60～80 ℃ simultaneously, keep constant temperature 1～3 hour.
Wherein, step 1), hydrotalcite is prepared from according to the step of carrying out as follows:
A) successively will be containing CO
3 2-, Al
3+, Mg
2+or Zn
2+or Cr
2+salt mix with ionized water, or will be containing OH
-alkali, containing Al
3+, Mg
2+or Zn
2+or Cr
2+salt mix with ionized water, at 60～85 ℃, stir, form mixing solutions, wherein, CO
3 2-or OH
-, Al
3+, Mg
2+or Zn
2+or Cr
2+mol ratio be 1～3: 3～5: 6～8;
B) red mud is added in above-mentioned solution, stir, temperature of charge remains on 60-85 ℃.
Wherein, steps A), contain CO
3 2-salt select sodium carbonate or salt of wormwood; Described containing Al
3+salt select AlCl
36H
2o; Described containing Mg
2+salt select MgCl
26H
2o; Containing Zn
2+salt select ZnCl
26H
2o; Described containing Cr
2+salt select CrCl
26H
2o; Described containing OH
-alkali select one or more in sodium hydroxide, potassium hydroxide or calcium hydroxide.
Particularly, above-mentioned steps A), can also CO will be contained successively
3 2-inorganic salt, Al
3+inorganic salt, Mg
2+and Zn
2+and Cr
2+in three's inorganic salt or three, the inorganic salt of any two kinds mix with ionized water, or successively will be containing OH
-alkali, containing Al
3+inorganic salt, Mg
2+and Zn
2+and Cr
2+in three's inorganic salt or three, the inorganic salt of any two kinds mix with ionized water, at 60～85 ℃, stir, and form mixing solutions.
Wherein, step B), red mud is by Al
2o
3, SiO
2, CaO, Fe
2o
3, Na
2o, TiO
2and K
2o forms.
Particularly, described Al
2o
3, SiO
2, CaO, Fe
2o
3, Na
2o, TiO
2and K
2mole proportioning of O is:
Al
2O
3 5～7
SiO
2 19～22
CaO 44～48
Fe
2O
3 8～12
Na
2O 2～2.5
TiO
2 2～2.5
K
2O 2～2.5
Particularly, by described red mud, be aluminium metallurgy factory waste.
Wherein, linking agent step 1) is epoxy resin and/or polypentaerythritol; Described stablizer is that glycerin fatty acid ester, lipid acid sorb are smooth, one or more in polysorbate or fatty alcohol-polyoxyethylene ether.
Beneficial effect of the present invention embodies in the following areas:
1, highly effective flame-retardant modifying asphalt of the present invention has not only kept high-temperature stability, low-temperature cracking-resistance that pitch is good, building stones has been had to good wrapping property and resistance to deterioration, also there is good highly effective flame-retardant, its limiting oxygen index(LOI) reaches 41%, reduce bituminous concrete and be subject to the pitch smog and the flame that in hyperthermia radiation and combustion processes, produce, reduced road smog and the burn threat that life is caused and the loss that property, economy are caused;
2, the fire retardant using in the present invention is inorganic mineral composite flame retardant, nontoxic, is more conducive to reduce the injury to human body;
3, highly effective flame-retardant modifying asphalt of the present invention can be widely used in war preparedness road, machine nest transport routes, cave depot road, tunnel, shipping Wharf Road and mats formation, and is convenient to strive for the time of speedily carrying out rescue work and personnel escape's time in the situation that there is war, fire, traffic accident;
4, highly effective flame-retardant modifying asphalt preparation process of the present invention is simple, and the raw materials cost that inorganic mineral composite flame retardant preparation adopts is low, is conducive to a large amount of production.
Embodiment
Embodiment mono-
1) preparation of hydrotalcite
(1) outfit of red mud
By the Al of 5mol
2o
3, 19mol SiO
2, the CaO of 44mol is, the Fe of 8mol
2o
3, 2mol Na
2the TiO of O, 2mol
2and the K of 2mol
2o mixes, and is mixed with red mud, standby.
(2) adopt AlCl
36H
2o, MgCl
26H
2o, NaCO
3for raw material, according to mol ratio n (Mg
2+): n (Al
3+): n (CO
3 2-)=6: 2: 1 take raw material;
(3) ionized water of 2000kg is joined in stainless steel stirring reaction axe, be heated to while stirring 60 ℃, in temperature, remain under the condition of 60 ℃, add sodium carbonate (60kg) stirring and dissolving even, then add AlCl
36H
2o (483kg), stirs; Then add MgCl
26H
2o (1218kg), stirs, and wherein stir speed (S.S.) is 800 revs/min;
(4) under temperature remains the condition of 60 ℃, the red mud (300kg) of preparation in step (1) is added in stainless steel stirring reaction axe, continue to stir 40 minutes, form the cotton-shaped suspension liquid of canescence;
(5) stop stirring, staticly settle, cool to room temperature, filter supernatant liquid, use again ionized water washing precipitate 2 times, then use absolute ethanol washing throw out 2 times, by throw out after 100 ℃ of oven dry, and 100 ℃ calcining 24 hours, make inorganic mineral Mg-Al hydrotalcite of the present invention.
2) preparation of inorganic mineral fire retardant
(1) first, by following proportioning, take raw material:
Mg-Al hydrotalcite 15kg
Polypentaerythritol 5kg
Nine contracting ten glycerine four oleic acid ester 7kg
(2) Mg-Al hydrotalcite is placed in to the reaction ax that fills 800kg ionized water, under normal pressure, stir 2 hours, whipping temp is 80 ℃, stirring velocity is 60 revs/min, forms cotton-shaped white suspension liquid, until suspension liquid precipitation, cooling after, filter supernatant liquid, in reactor, add polypentaerythritol 5kg, at the uniform velocity stir 25 minutes, stirring velocity is 60 revs/min.
(3) add nine contracting ten glycerine four oleic acid ester 7kg in stainless steel stirred autoclave, at the uniform velocity stir 30 minutes, stirring velocity is 60 revs/min, and warming while stirring, when temperature arrives 80 ℃, keeps constant temperature 2 hours.
The present invention is prepared in hydrotalcite process except NaCO
3can also adopt NaOH, KOH, K outward,
2cO
3, Ca (OH)
2, CaCO
3deng being raw material;
Stablizer, except nine contracting ten glycerine four oleic acid esters, can also adopt two triglycerol monoleates.
3) preparation of fire-retardant modified asphalt
A) according to following proportioning, take raw material
Heavily hand over the matrix pitch 80kg of 70#
Rubber and plastic composite modifier 9kg
Composite flame-retardant agent 9kg
Wherein, rubber and plastic composite modifier is styrene-butadiene-styrene block copolymer (SBS) and polyethylene (PE), and the weight proportion of SBS and PE is 1: 2, and wherein the model of SBS is 4303; PE is the polyethylene of high pressure low density; Composite flame-retardant agent is comprised of organophosphate flame retardant and inorganic mineral composite flame retardant, wherein organophosphate flame retardant is selected triaryl phosphate, triaryl phosphate and step 2) the inorganic mineral composite flame retardant weight proportion prepared is 7.6: 1.4.
The organophosphate flame retardant of composite flame-retardant agent of the present invention, except triaryl phosphate, can also be one or more in Tritolyl Phosphate, phosphotriester, halogen-containing phosphoric acid ester (haplotype and condensed type).
B) matrix pitch of heavily handing over 70# is joined in reaction ax, while heating to 120 ℃, drop into SBS, PE, limit edged stirs, and continues to be heated to 170 ℃ and remain on high-speed stirring at 170 ℃ simultaneously, stirs, make pre-modified mixture, wherein, stirring velocity is 800 revs/min, and churning time is 40 minutes;
C) then pre-modified mixture is joined to mixing roll and carry out continuous shearing treatment, make and shear mixing pitch, wherein, shearing frequency is 1500 beats/min, and temperature of charge is controlled at 160 ℃, and shear time is 60 minutes;
D) will shear mixing pitch inorganic mineral Mg-Al hydrotalcite composite flame-retardant agent and drop in swelling stirred autoclave, high-speed stirring, carries out swelling treatment for the first time, and wherein mixing speed is 800 revs/min, and stirring swelling time is 30 minutes;
E) triaryl phosphate is dropped in swelling stirred autoclave, high-speed stirring, carries out swelling treatment for the second time, obtains, and wherein mixing speed is 800 revs/min, and stirring swelling time is 20 minutes.
According to standard specification for construction and acceptance of highway asphalt pavement (JTGF40-2004), detect the modifying asphalt capability and performance making, detected result is listed in table 1.
Embodiment bis-
1, the preparation of inorganic mineral composite flame retardant
(1) outfit of red mud
Select the Al of 6mol
2o
3, 20mol SiO
2, the CaO of 45mol is, the Fe of 10mol
2o
3, 2mol Na
2the TiO of O, 2mol
2and the K of 2mol
2the red mud of O content, standby.
(2) adopt AlCl
36H
2o, ZnCl
26H
2o, NaOH are raw material, according to mol ratio n (Zn
2+): n (Al
3+): n (OH
-)=7: 4: 2 take raw material;
(3) ionized water of 2000kg is joined in stainless steel stirring reaction axe, be heated to while stirring 70 ℃, in temperature, be under 70 ℃ of conditions, to add sodium hydroxide NaOH (80kg) stirring and dissolving even, then add AlCl
36H
2o (966kg), stirs; Then add ZnCl
26H
2o (1638kg), stirs, and wherein, stirring velocity is 1000 revs/min;
(4) in temperature, remain under 70 ℃ of conditions, the red mud of preparation in step (1) is taken to 350kg and add in stainless steel stirring reaction axe, continue to stir 50 minutes, form the cotton-shaped suspension liquid of canescence;
(7) stop stirring, staticly settle, cool to room temperature, filter supernatant liquid, use again ionized water washing precipitate 3 times, then use absolute ethanol washing throw out 3 times, by throw out after 100 ℃ of oven dry, and 100 ℃ calcining 24 hours, make inorganic mineral Zn-Al hydrotalcite of the present invention.
2, the preparation of inorganic mineral fire retardant
(1) first, by following proportioning, take raw material:
Zn-Al hydrotalcite 50kg
Linking agent 10kg
Stablizer 10kg
Wherein, linking agent:
Epoxy resin 8kg
Polypentaerythritol 2kg
Stablizer:
Two triglycerol monostearate 5kg
Span 40 5kg
In the present invention, in stablizer, except using span 40, can also be sorbester p18.
(2) Zn-Al hydrotalcite 50kg is placed in to the reaction ax that fills 800kg ionized water, under normal pressure, stir 2 hours, whipping temp is 85 ℃, stirring velocity is 80 revs/min, forms cotton-shaped white suspension liquid, until suspension liquid precipitation, cooling after, filter supernatant liquid, in reactor, add linking agent epoxy resin 8kg, polypentaerythritol 2kg to add, at the uniform velocity stir 30 minutes, stirring velocity is 80 revs/min.
(3) add span 40 to weigh 5kg, two triglycerol monostearate 5kg in reactor, at the uniform velocity stir 30 minutes, stirring velocity is 80 revs/min, and warming while stirring, when temperature arrives 80 ℃, keeps constant temperature 2.5 hours.
3, the preparation of highly effective flame-retardant modifying asphalt
A) according to following proportioning, take raw material
Heavily hand over the matrix pitch 100kg of 100#
Rubber and plastic composite modifier 8kg
Composite flame-retardant agent 8kg
Wherein, rubber and plastic composite modifier is styrene-butadiene-styrene block copolymer (SBS), polyethylene (PE), ethylene-vinyl acetate copolymer (EVA), SBS, PE, EVA) weight proportion be 2.5: 3.5: 2; Composite flame-retardant agent is comprised of organophosphate flame retardant and inorganic mineral composite flame retardant, wherein organophosphate flame retardant is selected haplotype phosphoric acid ester, polyphosphoric acid amine condensed phosphoric acid esters, haplotype phosphoric acid ester, polyphosphoric acid amine condensed phosphoric acid esters and step 2) the inorganic mineral composite flame retardant weight proportion prepared is 2: 1.8: 4.2.
B) matrix pitch of heavily handing over 100# is joined in reaction ax, while heating to 130 ℃, drop into SBS, PE, EVA in matrix pitch, limit edged stirs, continue to be heated to 175 ℃ and remain on high-speed stirring at 175 ℃ simultaneously, stir, make pre-modified mixture, wherein mixing speed is 700 revs/min, and churning time is 50 minutes;
C) then pre-modified mixture is joined to mixing roll and carry out continuous shearing treatment, make and shear mixing pitch, wherein, shearing frequency is 1800 beats/min, and temperature of charge is controlled at 175 ℃, and shearing mixing time is 50 minutes;
D) will shear mixing pitch and inorganic mineral Zn-Al hydrotalcite composite flame-retardant agent and drop in swelling stirred autoclave, high-speed stirring, carries out swelling treatment for the first time, and wherein, mixing speed is 700 revs/min, and stirring swelling time is 35 minutes;
E) haplotype phosphoric acid ester, polyphosphoric acid amine condensed phosphoric acid esters are dropped in swelling stirred autoclave, high-speed stirring, carries out swelling treatment for the second time, obtain, wherein, mixing speed is 900 revs/min, stirring swelling time is 25 minutes, makes highly effective flame-retardant modified asphalt material of the present invention.
According to standard specification for construction and acceptance of highway asphalt pavement (JTGF40-2004), detect the modifying asphalt capability and performance making, detected result is listed in table 1.
Embodiment tri-
1, the preparation of inorganic mineral composite flame retardant
(1) outfit of red mud
Select the Al of 7mol
2o
3, 22mol SiO
2, the CaO of 48mol is, the Fe of 12mol
2o
3, 2.5mol Na
2the TiO of O, 2.5mol
2and the K of 2.5mol
2the red mud of O content, standby.
(2) adopt AlCl
36H
2o, CrCl
26H
2o, K
2cO
3for raw material, according to mol ratio n (Cr
2+): n (Al
3+): n (CO
3 2-)=8: 5: 3 take raw material;
(3) ionized water of 2000kg is joined in stainless steel stirring reaction axe, be heated to while stirring 85 ℃, in temperature, remain under the condition of 85 ℃, add K
2cO
3(354kg) stirring and dissolving is even, then adds AlCl
36H
2o (1207.5kg), stirs; Then add CrCl
26H
2o (1768kg), stirs, and wherein, stirring velocity is 1200 revs/min;
(4) under the condition of 85 ℃ of temperature holding positions, the red mud of preparation in step (1) is taken to (400kg) and add in stainless steel stirring reaction axe, continue to stir 55 minutes,, form the cotton-shaped suspension liquid of canescence;
(5) stop stirring, quiescent setting, cool to room temperature, filter supernatant liquid, use again deionized water washing sediment 2 times, then use absolute ethanol washing throw out 3 times, by throw out after 100 ℃ of oven dry, and 100 ℃ calcining 24 hours, make inorganic mineral Cr-Al hydrotalcite of the present invention.
2, the preparation of inorganic mineral fire retardant
(1) first, by following proportioning, take raw material:
Cr-Al hydrotalcite 3kg
Epoxy resin 3kg
Sorbester p18 1kg
Polysorbate60 1kg
In the present invention, except using described polysorbate60 as stablizer, can also use polysorbas20, tween 80.
(2) Cr-Al hydrotalcite is placed in to the reaction ax that fills 800kg ionized water, under normal pressure, stir 1 hour, whipping temp is 75 ℃, stirring velocity is 100 revs/min, forms cotton-shaped white suspension liquid, until suspension liquid precipitation, cooling after, filter supernatant liquid, in reactor, add linking agent epoxy resin 3kg, at the uniform velocity stir 40 minutes, stirring velocity is 100 revs/min.
(3) add sorbester p18 to weigh 1kg, polysorbate60 weighing 1kg in reactor, at the uniform velocity stir 45 minutes, stirring velocity is 100 revs/min, and warming while stirring, when temperature arrives 60 ℃, keeps constant temperature 1 hour.
3, the preparation of highly effective flame-retardant modifying asphalt
A) according to following proportioning, take raw material
Heavily hand over the matrix pitch 90kg of 90#
Rubber and plastic composite modifier 3kg
Composite flame-retardant agent 5kg
Wherein, rubber and plastic composite modifier is styrene-butadiene-styrene block copolymer (SBS), polyethylene (PE), ethylene-vinyl acetate copolymer (EVA), rubber, and the weight proportion of SBS, PE, EVA, rubber is 0.7: 1: 1: 0.3; Composite flame-retardant agent is haplotype phosphoric acid ester, haplotype phosphoric acid ester and step 2) the inorganic mineral composite flame retardant weight proportion prepared is 4.7: 0.3.
B) matrix pitch of heavily handing over 90# is added in reaction ax, while heating to 110 ℃, drop into SBS, PE, EVA, the stirring of rubber edge edged, continue to be heated to 165 ℃ and remain on high-speed stirring at 165 ℃ simultaneously, stir, make pre-modified mixture, wherein, stirring velocity is 6000 revs/min, and churning time is 30 minutes;
C) then pre-modified mixture is joined to mixing roll and carry out continuous shearing treatment, make and shear mixing pitch, wherein, shearing frequency is 1500 beats/min, and temperature of charge is controlled at 180 ℃, and shearing mixing time is 45 minutes;
D) will shear mixing pitch and inorganic mineral Cr-Al hydrotalcite composite flame-retardant agent and drop in swelling stirred autoclave, high-speed stirring, carries out swelling treatment for the first time, and wherein, mixing speed is 600 revs/min, and stirring swelling time is 40 minutes;
(4) haplotype phosphoric acid ester is dropped in swelling stirred autoclave, high-speed stirring, carries out swelling treatment for the second time, obtains, and wherein, mixing speed is 700 revs/min, and stirring swelling time is 35 minutes, makes highly effective flame-retardant modified asphalt material of the present invention.
4, detected result
According to standard specification for construction and acceptance of highway asphalt pavement (JTGF40-2004), detect the modifying asphalt capability and performance making, detected result is listed in table 1.
Reference examples one
Plain asphalt, manufacturer is: PetroChina Company Limited.'s Panjin refinery, Maoming Petrochemical, Lanzhou Oil Refinery, Korea S LG, English lotus imperial family shell.
The performance test results of table 1 highly effective flame-retardant modified asphalt material
Claims (5)
1. a fire-retardant modified asphalt, it is characterized in that comprising raw material: matrix pitch, rubber and plastic composite modifier, organic fire-retardant, inorganic combustion inhibitor, wherein, the weight part proportioning of described raw material is: matrix pitch 80～100, rubber and plastic composite modifier 3～12, organic fire-retardant 2～4, inorganic combustion inhibitor 3～6;
Wherein, described rubber and plastic composite modifier is selected two or more in styrene-butadiene-styrene block copolymer, polyethylene, ethylene-vinyl acetate copolymer, rubber;
Wherein, described organic fire-retardant is selected one or more in triaryl phosphate, Tritolyl Phosphate, halogen-containing haplotype phosphoric acid ester or halogen-containing condensed type phosphoric acid ester;
Wherein, described inorganic combustion inhibitor comprises raw material: hydrotalcite, stablizer, linking agent; The weight part proportioning of described inorganic combustion inhibitor raw material is: hydrotalcite 3～50, stablizer 3～10, linking agent 2～10.
2. modifying asphalt as claimed in claim 1, is characterized in that described linking agent is epoxy resin and/or polypentaerythritol; Described stablizer is that glycerin fatty acid ester, lipid acid sorb are smooth, one or more in polysorbate or fatty alcohol-polyoxyethylene ether.
3. modifying asphalt as claimed in claim 1 or 2, is characterized in that described matrix pitch selects heavily to hand over one or more in 70# pitch, 90# pitch, 100# pitch.
4. a preparation method for modifying asphalt, comprises the step of carrying out as follows:
(1) according to following weight part proportioning, prepare raw material
Wherein, described rubber and plastic composite modifier is selected two or more in styrene-butadiene-styrene block copolymer, polyethylene, ethylene-vinyl acetate copolymer, rubber;
Wherein, described organic fire-retardant is selected one or more in triaryl phosphate, Tritolyl Phosphate, halogen-containing haplotype phosphoric acid ester or halogen-containing condensed type phosphoric acid ester;
(2) matrix pitch is melted, carry out shearing treatment after adding rubber and plastic composite modifier to stir, make and shear mixing pitch;
(3) by shearing mixing pitch, mix with inorganic combustion inhibitor, stir, carry out swelling treatment for the first time;
(4) add organic fire-retardant, stir, carry out swelling treatment for the second time, both;
Wherein, the weight part proportioning of described hydrotalcite, stablizer and linking agent is: hydrotalcite 3～50; Stablizer 3～10; Linking agent 2～10.
5. preparation method as claimed in claim 4, is characterized in that the step that the inorganic combustion inhibitor described in step (1) carries out is in the following order prepared from:
1) according to following weight part proportioning, prepare raw material:
Hydrotalcite 3～50; Stablizer 3～10; Linking agent 2～10
2) hydrotalcite is mixed with ionized water, stir, form hydrotalcite suspension liquid;
3) after hydrotalcite suspension liquid staticly settles, in precipitation, add linking agent, stir;
4) add stablizer, stir and be heated to 60～80 ℃ simultaneously, keep constant temperature 1～3 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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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 |
| CN103436039B (en) * | 2013-08-26 | 2015-09-09 | 山东建筑大学 | A kind of rubber and plastic alloy modifying asphalt and asphalt |
| CN107011690A (en) * | 2017-05-13 | 2017-08-04 | 陈值英 | A kind of tunnel flame-retardant pitch and preparation method thereof |
| CN108252174A (en) * | 2017-12-04 | 2018-07-06 | 杭州睿琦化工科技有限公司 | Asphalt roads construction method |
| CN108250771A (en) * | 2017-12-04 | 2018-07-06 | 杭州睿琦化工科技有限公司 | Road modified asphalt |
| CN108676371A (en) * | 2018-04-28 | 2018-10-19 | 广东诚泰投资有限公司 | A kind of modified pitch of high flame retardant |
| CN111440458A (en) * | 2020-06-08 | 2020-07-24 | 龙岩米讯星科技有限公司 | Carbon nanotube modified epoxy resin asphalt material and preparation method thereof |
| CN112266623A (en) * | 2020-10-29 | 2021-01-26 | 山东大学 | Red mud-based composite modified asphalt cement paste, modified asphalt mixture, and preparation methods and applications thereof |
| CN112876871B (en) * | 2021-01-25 | 2022-08-16 | 南京朝科路桥工程技术有限公司 | Environment-friendly hot-mix asphalt mixture and preparation method thereof |
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| JPS60197762A (en) * | 1984-03-21 | 1985-10-07 | Hitachi Cable Ltd | Flame-retardant asphalt composition |
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