CN102234432B - Anti-stripping warm mix asphalt additive agent comprising surfactant, preparation method and application thereof - Google Patents
Anti-stripping warm mix asphalt additive agent comprising surfactant, preparation method and application thereof Download PDFInfo
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Abstract
The invention, belonging to the field of construction engineering, relates to an anti-stripping warm mix asphalt additive agent comprising surfactant, its preparation method and application. The anti-stripping warm mix asphalt additive agent disclosed in the invention comprises polyvinyl acetal, polyacrylamide, fatty acid anhydride ester surfactant, polyoxyethylene acid ester surfactant and water. The warm mix asphalt additive agent disclosed in the invention can enhance the bonding of stone, rock flour and asphalt, so as to get the purposes of high strength and preventing stripping. The requirements of the technical characteristics of the warm mix asphalt is realized by spraying the additive agent with the content of 5-6% of the weight of the asphalt when the temperature of the asphalt reaches 120-130 DEG C, and then carrying out blending and operation as routine asphalt. The warm mix asphalt additive agent disclosed in the invention has no substances which are harmful to the human body and environment, with being environmentally friendly, and is an excellent product with energy saving and emission reduction.
Description
Technical field
The invention belongs to building engineering field, be specifically related to a kind of antistripping warm-mixed asphalt additive and preparation and application that is formed by tensio-active agent.
Background technology
At present, domestic most roads adopt traditional hot asphalt technique, and it is thick pitch to be mixed and construct with finger stone, aggregate chips, stone flour etc. to form about 180 ℃.
Hot-mix asphalt mixture is subject to the favor of the numerous countries in the world with its well-known good use properties in expressway construction.Up to now, hot-mix asphalt mixture be most widely used, a kind of compound that pavement performance is the best.But himself also expose a lot of self implacable defective, be mainly manifested in the following aspects: temperature was high when mixed (1), and thermosteresis is serious, and energy consumption is high; (2) high-temperature mix and stir and execution conditions to have accelerated compound aging, reduced Asphalt Mixture; (2) short construction seasons causes very large machinery, personnel to leave unused, and is long in time limit; (3) high temperature impels the decomposition of components volatilization of pitch, and the noxious gas emission environmental pollution of compound production process is serious, has both reduced the quality of asphalt roads, makes again these volatiless C
mH
n, CO
2, SO
2, NO
xEtc. contaminate environment and to affect the operator healthy; (4) energy-output ratio is large.
For conserving natural habitats, reduce environmental pollution and lack of energy, all strictly limit dischargings such as greenhouse gases, obnoxious flavour and solid dusts countries in the world.The production of asphalt is energy expenditure and environmental pollution rich and influential family in the road engineering.Have data to show, 1 ton of hot-mixed asphaltic concrete of every production need consume 8L oil fuel.As mix and stir temperature and reduce by 30～35 ℃, oily 2.4L/t capable of saving fuel, and can reduce CO more than 30%
2Quantity discharged in gas and dust.In the industry that takes full advantage of resource development bituminous concrete, warm-mixed asphalt (Warm MixAsphalt is referred to as WMA) technology is one of main focussing direction of at present research.
So-called Warm-Mix Bitumen Mixture is exactly by certain technical measures, reduce the viscosity of pitch, pitch can be mixed and stirred under relatively low temperature and construct, the asphalt technology that keeps simultaneously its use properties that is not less than HMA, gordian technique are exactly how to reduce the viscosity of mixing and stirring of pitch under the prerequisite of the pavement performance that does not damage HMA.Warm-Mix Bitumen Mixture is because its lower mixing and stirring and compacting temperature makes it compare many advantages with hot-mix asphalt mixture.Yet, in the prior art, in order to improve the character of warm-mixed asphalt, it is complicated generally need to add proportion of composing in warm-mixed asphalt, and the warm-mixed asphalt additive that cost is higher, therefore be unfavorable for industrialized large-scale promotion, contain the materials such as amine of toxic effect in some additive toward contact, therefore in the asphalt paving process, still can't avoid the discharging of obnoxious flavour fully.
Summary of the invention
The object of the invention is to overcome the defective of prior art, a kind of antistripping warm-mixed asphalt additive and preparation and application that is comprised of the superficiality agent is provided.
The present invention adopts following technical scheme to solve the problems of the technologies described above:
A kind of antistripping warm-mixed asphalt additive that is formed by tensio-active agent, the component title and the weight percent thereof that contain in this warm-mixed asphalt additive are:
Polyvinyl acetal 0.1%～2%;
Polyacrylamide 0.1%～2%;
Fatty acid anhydride esters surface active agent 1%～10%;
Polyoxyethylene esters of gallic acid tensio-active agent 1%～10%;
Water surplus.
Better, the molecular weight of described polyvinyl acetal is 1 * 10
4～5 * 10
4Degree of acetalization is 40%～60%, more preferably 50%.
Better, the number-average molecular weight of described polyacrylamide is 3 * 10
5～6 * 10
5
Better, described fatty acid anhydride esters surface active agent is selected from one or more the mixture in succinyl-monoleate, mono laurate sorbitan ester and the xylitan monostearate.
Better, described polyoxyethylene esters of gallic acid tensio-active agent is to be selected from Emulsifier LT-60M, polyoxyethylene sorbitol acid anhydride cetylate and the polyoxyethylene stearic acid ester one or more, and described polyoxyethylene esters of gallic acid tensio-active agent is routine.
Better, described water is deionized water.
The present invention also provides the preparation method of the described antistripping warm-mixed asphalt additive that is comprised of tensio-active agent, comprises the steps:
1) with polyvinyl acetal with water as solvent, being dissolved into solid content is the polyvinyl acetal mixed solution of 20%～50% (weight percent);
2) with polyacrylamide with water as solvent, be mixed with the polyacrylamide mixed solution of solid content 5%～15% (weight percent);
3) with after water and the mixing of fatty acid anhydride esters surface active agent, obtain fatty acid acid anhydride esters surface active agent mixed solution stirs;
4) with step 3) in the fatty acid anhydride esters surface active agent mixed solution that makes be heated to 50～80 ℃, in proportion polyoxyethylene esters of gallic acid tensio-active agent is joined in the fatty acid anhydride esters surface active agent mixed solution while stirring and makes the tensio-active agent mixed emulsion;
5) with step 1) in the polyvinyl acetal mixed solution that makes, with step 2) in the polyacrylamide mixed solution that the makes limit that heats while stirring by weight proportion add step 4) in the tensio-active agent mixed emulsion that makes, and stir and make homogeneous latex emulsion;
6) in step 5) in add excess water in the homogeneous latex emulsion that makes, stirring and cooling off namely makes antistripping warm-mixed asphalt additive of the present invention.
Wherein, step 1) in, the preparation method of described polyvinyl acetal can be confirmed according to prior art by those skilled in the art, better, the preparation method of described polyvinyl acetal comprises the steps: polyvinyl acetate is dissolved in acetic acid or the alcohol, under the katalysis of sulfuric acid or hydrochloric acid, is hydrolyzed and acetalation with aldehyde, one step generated polyvinyl acetal, and described aldehyde is preferably formaldehyde.
Further preferred, the preparation method of described polyvinyl acetal is: be 1 * 10 with the number-average molecular weight of 80～120 weight parts
4～5 * 10
4Polyvinyl acetate, the water Hybrid Heating to 60 of the acetic acid of 150～250 weight parts and 50～100 weight parts～80 ℃, be stirred to fully dissolving, then add the formaldehyde solution of 50～80 weight parts (with the weighing scale of this formaldehyde solution, the weight percent of formaldehyde is 30～50%) and the sulfuric acid of 3～6 weight parts mix, under 60～80 ℃ temperature condition, react 20～30h, neutralize with ammonium acetate again, add water and namely separate out polyvinyl acetal, can make the polyvinyl acetal product through washing, drying.
Better, step 1) in, the solid content of described polyvinyl acetal solution is 30%.
Better, step 2) in, the solid content of described polyacrylamide solution is 10%.
Better, step 3) in, the weight ratio of described water and fatty acid anhydride esters surface active agent is 4: (1～10).
Better, step 3) in, described churning time is 15～30 minutes.
The present invention also provides a kind of and has used the described antistripping warm-mixed asphalt additive that is comprised of tensio-active agent to mix application in the technique in the temperature of road bitumen mixture.
Better, described application comprises the steps: when the asphalt temperature reaches 120～130 ℃, in asphalt, spray into antistripping warm-mixed asphalt additive of the present invention, then press asphalt mixing and constructing operation, can reach the processing requirement of warm-mixed asphalt.
Preferably, the weight of the antistripping warm-mixed asphalt additive of described adding is 5～6% of described asphalt weight.
The action principle of the antistripping warm-mixed asphalt additive that is comprised of tensio-active agent of the present invention is: pitch is oily substance, and stone, aggregate chips, the stone flour overwhelming majority are aqueous substance, are not having under the external factor effect, and both are difficult to combine.The part surface promoting agent that contains in this prescription have can with the group of the strong combination of inorganic matter, and in this surfactant molecule, contain again the organic long-chain group, can link together with pitch oil molecule, thereby so that pitch can firmly be combined with materials such as stones, reach the purpose of antistripping; Simultaneously, contain hydrophilic surfactant and lipophilic surfactant in the antistripping warm-mixed asphalt additive of the present invention, in conjunction with the amphipathic property of several materials, by calculating, reaching HLB is worth optimizing.In additive, become [o/w] type emulsion; And in the middle of compound mixes and stirs process, mix a large amount of pitches after, become [w/o] type micro-emulsion type emulsion.The particle diameter of water microballon is evenly distributed in the middle of the pitch between 2～3 μ m, thereby has effectively reduced the asphalt high-temperature viscosity, reaches the processing requirement that temperature is mixed.
The temperature that the antistripping warm-mixed asphalt additive that is comprised of tensio-active agent of the present invention can be applicable to the road bitumen mixture is mixed and is made additive in the technique, can strengthen well the bonding degree of stone, stone flour and pitch, make warm-mixed asphalt reach the anti-purpose of peeling off of high strength.In the process of using, do not exist environment and human harmful substance, environmentally friendly, be the product of energy-saving and emission-reduction aspect.Simultaneously, use antistripping warm-mixed asphalt additive of the present invention, can obviously reduce and mix and stir temperature, building stones Heating temperature and asphalt thermal insulation temperature, therefore can reduce the cost in the process of mixing and stirring, mix and stir and wrap difficulty and descend, mix and stir the also corresponding decline of energy consumption and mechanical loss.Simultaneously, compare with existing warm-mixed asphalt additive, do not contain the material that amine etc. has toxic action in the additive of the present invention, in paving process, substantially can realize the smoke dust operation.Workman's labor condition is significantly improved, and infringement alleviates bituminous pavement to workers ' health; Simultaneously, compound mixes and stirs the bituminous pavement operation to road resident's along the line also significantly minimizing of physiological effect.And its moiety is less, so cost can obviously reduce.
Description of drawings
Preparation technology's schema of the antistripping warm-mixed asphalt additive that is formed by tensio-active agent among Fig. 1 the present invention.
Embodiment
Further describe technical scheme of the present invention below by specific embodiment.Should be understood that these embodiment only to be used for explanation the present invention and be not used in and limit the scope of the invention.
Embodiment 1
1, the preparation of polyvinyl acetal:
Be 1 * 10 with the number-average molecular weight of 100 weight parts
4～5 * 10
4Polyvinyl acetate, the water Hybrid Heating to 60 of the acetic acid of 200 weight parts and 70 weight parts ℃, be stirred to fully dissolving, then add the formaldehyde solution of 60 weight parts (with the weighing scale of this formaldehyde solution, the weight percent of formaldehyde is 30%) and the sulfuric acid of 4 weight parts mix, under 80 ℃ temperature condition, react 24h, neutralize with ammonium acetate again, add water and namely separate out polyvinyl acetal, can make the polyvinyl acetal product through washing, drying.
2, the preparation of antistripping warm-mixed asphalt additive:
1) with polyvinyl acetal with water as solvent, being dissolved into solid content is the polyvinyl acetal mixed solution of 20% (weight percent);
2) with polyacrylamide take water as solvent, be mixed with the polyacrylamide mixed solution of solid content 10% (weight percent);
3) water of 40 weight parts is added the fatty acid anhydride esters surface active agent (succinyl-monoleate) of 10 weight parts, stir 20 minutes to even obtain fatty acid acid anhydride esters surface active agent mixed solution;
4) with step 3) in the fatty acid anhydride esters surface active agent mixed solution that makes be heated to 60 ℃, in proportion the polyoxyethylene esters of gallic acid tensio-active agent (Emulsifier LT-60M) of 10 weight parts is joined in the fatty acid anhydride esters surface active agent mixed solution while stirring and makes the tensio-active agent mixed emulsion;
5) with step 1) in the polyvinyl acetal mixed solution that makes, with step 2) in the polyacrylamide mixed solution that the makes limit that heats while stirring by weight proportion add step 4) in the tensio-active agent mixed emulsion that makes, and stir and make homogeneous latex emulsion;
6) in step 5) in add the emulsion of excess water to 100 weight part in the homogeneous latex emulsion that makes, stirring and cooling off namely makes the antistripping warm-mixed asphalt additive.
3, the application of antistripping warm-mixed asphalt additive and nature examination:
When the asphalt temperature reaches 120 ℃, in asphalt, spray into the antistripping warm-mixed asphalt additive that makes in the present embodiment, then press asphalt mixing and constructing operation, the weight of the antistripping warm-mixed asphalt additive that wherein adds is 5% of described asphalt weight.
Method according to " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) and " highway engineering pitch and Asphalt Mixture Experiment rules " (JTJ 052-2000) regulation, asphalt is made respectively the warm-mixed asphalt test block of traditional hot asphalt test block and this additive of use, under defined terms, carry out performance test.
The test determination condition is as shown in table 1, adopt AC-13 grating asphalt, according to JTG F40-2004 code requirement, take goal porosity 4% as the control index, carry out the Bitumen Mix Design of AC-13 grating, obtaining best asphalt content is 4.5%.
Table 1 is according to the prescribed condition of " standard specification for construction and acceptance of highway asphalt pavement " prescriptive procedure asphalt Marshall processed test block:
Take by weighing and mix and stir material and make the Marshall test block, parallel test three times compares research to their indexs such as high-temperature stability, water stability, and it is as shown in table 2 to record application performance:
Table 2 Warm-Mix Bitumen Mixture and hot-mix asphalt mixture Marshall test block test result contrast
| Sequence number | Project | Warm-Mix Bitumen Mixture | Hot-mix asphalt mixture | Code requirement |
| 1 | Marshall stability/KN | 12.5 | 16.8 | ≥8 |
| 2 | Freeze thawing splitting retained strength ratio/% | 84.5 | 86.3 | ≥80 |
| 3 | Immersion Marshall residual stability/% | 97 | 98 | ≥85 |
| 4 | Dynamic stability/(inferior .mm -1) | 7699 | 8175 | ≥2800 |
Show by test-results, Warm-Mix Bitumen Mixture is in the situation of mixing and stirring with mold temperature obvious reduction with respect to hot-mix asphalt mixture, every road is all of slight difference with hot-mix asphalt mixture with index, satisfy " standard specification for construction and acceptance of highway asphalt pavement " requirement (JTGF40-2004), simultaneously, this warm-mixed asphalt additive can strengthen the bonding degree of stone, stone flour and pitch well, makes warm-mixed asphalt reach the anti-purpose of peeling off of high strength.
Embodiment 2
1, the preparation of polyvinyl acetal:
Be 1 * 10 with the number-average molecular weight of 80 weight parts
4～5 * 10
4Polyvinyl acetate, the water Hybrid Heating to 80 of the acetic acid of 250 weight parts and 100 weight parts ℃, be stirred to fully dissolving, then add the formaldehyde solution of 80 weight parts (with the weighing scale of this formaldehyde solution, the weight percent of formaldehyde is 50%) and the sulfuric acid of 6 weight parts mix, under 60 ℃ temperature condition, react 30h, neutralize with ammonium acetate again, add water and namely separate out polyvinyl acetal, can make the polyvinyl acetal product through washing, drying.
2, the preparation of antistripping warm-mixed asphalt additive:
1) with polyvinyl acetal with water as solvent, being dissolved into solid content is the polyvinyl acetal mixed solution of 50% (weight percent);
2) polyacrylamide is mixed with the polyacrylamide mixed solution of solid content 15% (weight percent);
3) water of 40 weight parts is added the fatty acid anhydride esters surface active agent (mono laurate sorbitan ester) of 1 weight part, stir 20 minutes to even obtain fatty acid acid anhydride esters surface active agent mixed solution;
4) with step 3) in the fatty acid anhydride esters surface active agent mixed solution that makes be heated to 80 ℃, in proportion the polyoxyethylene esters of gallic acid tensio-active agent (polyoxyethylene sorbitol acid anhydride cetylate) of 5 weight parts is joined in the fatty acid anhydride esters surface active agent mixed solution while stirring and makes the tensio-active agent mixed emulsion;
5) with step 1) in the polyvinyl acetal mixed solution that makes, with step 2) in the polyacrylamide mixed solution that the makes limit that heats while stirring by weight proportion add step 4) in the tensio-active agent mixed emulsion that makes, and stir and make homogeneous latex emulsion;
6) in step 5) in add the emulsion of excess water to 100 weight part in the homogeneous latex emulsion that makes, stirring and cooling off namely makes the antistripping warm-mixed asphalt additive.
3, the application of antistripping warm-mixed asphalt additive and nature examination:
When the asphalt temperature reaches 125 ℃, in asphalt, spray into the antistripping warm-mixed asphalt additive that makes in the present embodiment, then press asphalt mixing and constructing operation, the weight of the antistripping warm-mixed asphalt additive that wherein adds is 6% of described asphalt weight.
Method according to " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) and " highway engineering pitch and Asphalt Mixture Experiment rules " (JTJ 052-2000) regulation, asphalt is made respectively the warm-mixed asphalt test block of traditional hot asphalt test block and this additive of use, under defined terms, carry out performance test.
Adopt AC-13 grating asphalt, according to JTG F40-2004 code requirement, take goal porosity 4% as the control index, carry out the Bitumen Mix Design of AC-13 grating, obtaining best asphalt content is 4.5%.Take by weighing according to " standard specification for construction and acceptance of highway asphalt pavement " prescriptive procedure and to mix and stir material and make the Marshall test block, parallel test three times compares research to their indexs such as high-temperature stability, water stability.Show by test-results, Warm-Mix Bitumen Mixture is in the situation of mixing and stirring with mold temperature obvious reduction with respect to hot-mix asphalt mixture, every road is all of slight difference with hot-mix asphalt mixture with index, satisfy " standard specification for construction and acceptance of highway asphalt pavement " requirement (JTGF40-2004), simultaneously, this warm-mixed asphalt additive can strengthen the bonding degree of stone, stone flour and pitch well, makes warm-mixed asphalt reach the anti-purpose of peeling off of high strength.
Embodiment 3
1, the preparation of polyvinyl acetal:
Be 1 * 10 with the number-average molecular weight of 120 weight parts
4～5 * 10
4The acetic acid of polyvinyl acetate, 150 weight parts and the water Hybrid Heating to 70 of 50 weight parts ℃, be stirred to fully dissolving, then add the formaldehyde solution of 50 weight parts (with the weighing scale of this formaldehyde solution, the weight percent of formaldehyde is 40%) and the sulfuric acid of 3 weight parts mix, under 70 ℃ temperature condition, react 20h, with the ammonium acetate neutralization, add water and namely separate out polyvinyl acetal again, can make the polyvinyl acetal product through washing, drying.
2, the preparation of antistripping warm-mixed asphalt additive:
1) with polyvinyl acetal with water as solvent, being dissolved into solid content is the polyvinyl acetal solution of 20% (weight percent);
2) polyacrylamide is mixed with the polyacrylamide mixed solution of solid content 5% (weight percent);
3) water of 40 weight parts is added the fatty acid anhydride esters surface active agent (succinyl-monoleate and xylitan monostearate are the mixture that cooperates at 1: 1 according to weight ratio) of 8 weight parts, stirs 15 minutes to even obtain fatty acid acid anhydride esters surface active agent mixed solution;
4) with step 3) in the fatty acid anhydride esters surface active agent mixed solution that makes be heated to 50 ℃, in proportion the polyoxyethylene esters of gallic acid tensio-active agent (polyoxyethylene sorbitol acid anhydride cetylate and polyoxyethylene stearic acid ester are the mixture that cooperates at 1: 1 according to weight ratio) of 8 weight parts is joined in the fatty acid anhydride esters surface active agent mixed solution while stirring and makes the tensio-active agent mixed emulsion;
5) with step 1) in the polyvinyl acetal solution that makes, and step 2) in the polyacrylamide mixed solution that the makes limit that heats while stirring by weight proportion add step 4) in the tensio-active agent mixed emulsion that makes, and stir and make homogeneous latex emulsion;
6) in step 5) in add the emulsion of excess water to 100 weight part in the homogeneous latex emulsion that makes, stirring and cooling off namely makes the antistripping warm-mixed asphalt additive.
3, the application of antistripping warm-mixed asphalt additive and nature examination:
When the asphalt temperature reaches 120 ℃, in asphalt, spray into the antistripping warm-mixed asphalt additive that makes in the present embodiment, then press asphalt mixing and constructing operation, the weight of the antistripping warm-mixed asphalt additive that wherein adds is 6% of described asphalt weight.
Method according to " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) and " highway engineering pitch and Asphalt Mixture Experiment rules " (JTJ 052-2000) regulation, asphalt is made respectively the warm-mixed asphalt test block of traditional hot asphalt test block and this additive of use, under defined terms, carry out performance test.
Adopt AC-13 grating asphalt, according to JTG F40-2004 code requirement, take goal porosity 4% as the control index, carry out the Bitumen Mix Design of AC-13 grating, obtaining best asphalt content is 4.5%.Take by weighing according to " standard specification for construction and acceptance of highway asphalt pavement " prescriptive procedure and to mix and stir material and make the Marshall test block, parallel test three times compares research to their indexs such as high-temperature stability, water stability.Show by test-results, Warm-Mix Bitumen Mixture is in the situation of mixing and stirring with mold temperature obvious reduction with respect to hot-mix asphalt mixture, every road is all of slight difference with hot-mix asphalt mixture with index, satisfy " standard specification for construction and acceptance of highway asphalt pavement " requirement (JTGF40-2004), simultaneously, this warm-mixed asphalt additive can strengthen the bonding degree of stone, stone flour and pitch well, makes warm-mixed asphalt reach the anti-purpose of peeling off of high strength.
Claims (10)
1. antistripping warm-mixed asphalt additive that is formed by tensio-active agent, the component title and the weight percent thereof that contain in this warm-mixed asphalt additive are:
2. the antistripping warm-mixed asphalt additive that is comprised of tensio-active agent as described in claim 1 is characterized in that, the molecular weight of described polyvinyl acetal is 1 * 10
4～5 * 10
4, degree of acetalization is 40%～60%.
3. the antistripping warm-mixed asphalt additive that is comprised of tensio-active agent as described in claim 1 is characterized in that, the number-average molecular weight of described polyacrylamide is 3 * 10
5～6 * 10
5
4. the antistripping warm-mixed asphalt additive that is formed by tensio-active agent as described in claim 1, it is characterized in that described fatty acid anhydride esters surface active agent is selected from one or more the mixture in succinyl-monoleate, mono laurate sorbitan ester and the xylitan monostearate.
5. the antistripping warm-mixed asphalt additive that is formed by tensio-active agent as described in claim 1, it is characterized in that described polyoxyethylene esters of gallic acid tensio-active agent is to be selected from Emulsifier LT-60M, polyoxyethylene sorbitol acid anhydride cetylate and the polyoxyethylene stearic acid ester one or more.
6. the preparation method of the described antistripping warm-mixed asphalt additive that is comprised of tensio-active agent of arbitrary claim in the claim 1～5 comprises the steps:
1) with polyvinyl acetal with water as solvent, being dissolved into solid content is the polyvinyl acetal mixed solution of 20 % by weight～50 % by weight;
2) with polyacrylamide with water as solvent, be mixed with the polyacrylamide mixed solution of solid content 5 % by weight～15 % by weight;
3) with after water and the mixing of fatty acid anhydride esters surface active agent, obtain fatty acid acid anhydride esters surface active agent mixed solution stirs;
4) with step 3) in the fatty acid anhydride esters surface active agent mixed solution that makes be heated to 50～80 ℃, in proportion polyoxyethylene esters of gallic acid tensio-active agent is joined in the fatty acid anhydride esters surface active agent mixed solution while stirring and makes the tensio-active agent mixed emulsion;
5) with step 1) in the polyvinyl acetal mixed solution that makes, with step 2) in the polyacrylamide mixed solution that the makes limit that heats while stirring by weight proportion add step 4) in the tensio-active agent mixed emulsion that makes, and stir and make homogeneous latex emulsion;
6) in step 5) in add excess water in the homogeneous latex emulsion that makes, stirring and cooling off namely makes described antistripping warm-mixed asphalt additive.
7. the preparation method of the antistripping warm-mixed asphalt additive that is formed by tensio-active agent as described in claim 6, it is characterized in that, the preparation method of described polyvinyl acetal comprises the steps: polyvinyl acetate is dissolved in acetic acid or the alcohol, under the katalysis of sulfuric acid or hydrochloric acid, be hydrolyzed and acetalation with aldehyde, a step generates polyvinyl acetal.
8. the preparation method of the antistripping warm-mixed asphalt additive that is comprised of tensio-active agent as described in claim 6 is characterized in that step 3) in, the weight ratio of described water and fatty acid anhydride esters surface active agent is 4: (1～10).
9. the described antistripping warm-mixed asphalt additive that is comprised of tensio-active agent of arbitrary claim is mixed application in the technique in the temperature of road bitumen mixture in the claim 1～5.
10. the application of the antistripping warm-mixed asphalt additive that described in claim 9, is formed by tensio-active agent, and be characterised in that, described application comprises the steps: when the asphalt temperature reaches 120～130 ℃, in asphalt, spray into described antistripping warm-mixed asphalt additive, then press asphalt mixing and constructing operation.
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| CN105585271B (en) * | 2014-10-22 | 2017-07-28 | 中国石油化工股份有限公司 | A kind of additive and its application process for improving stability of asphalt mixture |
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| CN110643186A (en) * | 2019-09-18 | 2020-01-03 | 湖南鑫长胜材料科技有限公司 | Asphalt warm-mixing agent and application thereof |
| CN111825994B (en) * | 2020-08-06 | 2022-06-17 | 上海缤德新材料科技有限公司 | High-ductility high-elasticity modified asphalt composition and preparation method thereof |
| CN115044099B (en) * | 2022-06-16 | 2023-06-16 | 山东高速工程检测有限公司 | Two-dimensional asphalt warm mix agent suitable for ultralow-temperature construction of hot mix asphalt mixture, warm mix asphalt and preparation method thereof |
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| CN102234432A (en) | 2011-11-09 |
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