CN113666667A - A kind of water-damage-resistant sulfur-modified asphalt mixture and preparation method thereof - Google Patents
A kind of water-damage-resistant sulfur-modified asphalt mixture and preparation method thereof Download PDFInfo
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- CN113666667A CN113666667A CN202110939597.6A CN202110939597A CN113666667A CN 113666667 A CN113666667 A CN 113666667A CN 202110939597 A CN202110939597 A CN 202110939597A CN 113666667 A CN113666667 A CN 113666667A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 100
- 239000000203 mixture Substances 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000011593 sulfur Substances 0.000 claims abstract description 70
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 70
- XMGQYMWWDOXHJM-UHFFFAOYSA-N limonene Chemical compound CC(=C)C1CCC(C)=CC1 XMGQYMWWDOXHJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 150000003463 sulfur Chemical class 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 21
- 239000011707 mineral Substances 0.000 claims description 21
- 235000010755 mineral Nutrition 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 229910052631 glauconite Inorganic materials 0.000 claims description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 3
- BHTBHKFULNTCHQ-UHFFFAOYSA-H zinc;tin(4+);hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Sn+4] BHTBHKFULNTCHQ-UHFFFAOYSA-H 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 1
- 239000011435 rock Substances 0.000 claims 1
- 239000002019 doping agent Substances 0.000 abstract description 5
- 238000011056 performance test Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000003607 modifier Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000001881 scanning electron acoustic microscopy Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000035900 sweating Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F292/00—Macromolecular compounds obtained by polymerising monomers on to inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
本发明公开了一种抗水损硫磺改性沥青混合料，各组分及其所占重量份数包括：集料95～100份，改性硫磺1～5份，沥青3～8份；改性硫磺利用双戊烯和丙烯酸异辛酯对硫磺进行聚合改性而成，所述改性硫磺采用的各原料及其所占质量百分比包括：硫磺96～98％，双戊烯1～2％，丙烯酸异辛酯0～1％，外掺剂0～1％。本发明所述硫磺改性沥青混合料在保证硫磺改性沥青混合料良好的高温性能的同时，可极大地改善硫磺改性沥青混合料水稳性能不足等问题,且涉及的制备方法较简单，适合推广应用。The invention discloses a water-damage-resistant sulfur-modified asphalt mixture. Each component and its parts by weight include: 95-100 parts of aggregate, 1-5 parts of modified sulfur, and 3-8 parts of asphalt; The modified sulfur is formed by polymerizing and modifying sulfur with dipentene and isooctyl acrylate. The raw materials used in the modified sulfur and their mass percentages include: sulfur 96-98%, dipentene 1-2% , 0-1% of isooctyl acrylate, 0-1% of external doping agent. The sulfur-modified asphalt mixture of the present invention can greatly improve the problems of insufficient water stability of the sulfur-modified asphalt mixture while ensuring the good high-temperature performance of the sulfur-modified asphalt mixture, and the involved preparation method is relatively simple. Suitable for promotion and application.
Description
Technical Field
The invention belongs to the technical field of road building materials, and particularly relates to a water loss resistant sulfur modified asphalt mixture and a preparation method thereof.
Background
As early as the early 20 th century, people have begun to use sulfur as a modifier to improve the road performance related to asphalt mixtures; but due to the rising sulfur price and the release of H in the production process of the sulfur-modified asphalt mixture2S and other sulfur-containing toxic gases seriously restrict the development of the technology for changing sulfur into asphalt. Until the early stage of the 20 th century 80 s, sulfur modifier SEAM researched and produced by Rockbande USA better solves the problem of sulfur-containing gas emission in the production process, so that the sulfur modified asphalt technology is widely applied again. In the decades of 1981-1990, the United states and Canada have built a plurality of highways by adopting the sulfur modified asphalt mixture. Since the 21 st century, the construction cost of asphalt pavement is increasing due to the rising international oil price. Sulfur as a modifier of asphalt can be used to replace part of asphalt by internal mixing method, and can effectively reduce the pressure on asphalt supply to resourcesThe cost of sulfur is gradually reduced, so that the construction cost of the pavement can be greatly reduced, and the method becomes a hot spot of research in the industry in recent years.
Patent CN107523072A discloses warm-mixed sulfur asphalt, which adopts warm-mixed agent that is prepared by taking polyethylene wax as raw material through sweating process; the obtained warm-mixed sulfur asphalt reduces the preparation temperature and the use temperature of the sulfur asphalt, reduces the generation amount of harmful gas, and simultaneously improves the high-temperature stability of the asphalt pavement. Patent CN 169019 discloses a sulfur modified asphalt mixture for paving asphalt pavement, which is prepared by mixing sulfur, carbon, smoke inhibitor and plasticizer to form modified sulfur, and adding the modified sulfur into asphalt mixture; the construction process of the mixture is that the mixing temperature is not higher than 150 ℃, the rolling temperature is not lower than 90 ℃, and the harmful gas in the construction process can be effectively reduced. Greatly improving the pavement quality.
However, the existing sulfur modified asphalt mixture usually has the problems of serious insufficient water stability and the like. The research on the asphalt vulcanization process indicates that hydrogen in the asphalt is captured by sulfur in the vulcanization process to generate hydrogen sulfide, and meanwhile, a sulfur-containing group is generated in the crosslinking action of the sulfur and asphalt molecules, so that the original composition and properties of the asphalt are changed, the average molecular weight of the modified asphalt is increased, the viscosity of the modified asphalt is reduced, and the water stability of the asphalt is reduced. Therefore, the further exploration of the sulfur modified asphalt mixture with better water stability has important research and application significance.
Disclosure of Invention
The invention mainly aims to solve the problems and the defects in the prior art, and provides a water loss resistant sulfur modified asphalt mixture which has good high-temperature stability, can reduce the construction temperature of 20-30 ℃, has good water stability, and can effectively solve the problems of insufficient water stability and the like of the existing road modified sulfur asphalt mixture; and the related preparation method is simple, convenient to operate and suitable for popularization and application.
In order to achieve the purpose, the invention adopts the technical scheme that:
the water loss resistant sulfur modified asphalt mixture comprises the following components in parts by weight: 95-100 parts of aggregate, 1-5 parts of modified sulfur and 3-8 parts of asphalt; wherein the modified sulfur is prepared by polymerizing and modifying sulfur by utilizing dipentene and/or isooctyl acrylate.
In the scheme, the modified sulfur comprises the following raw materials in percentage by mass: 96-98% of sulfur, 1-2% of dipentene, 0.1-1% of isooctyl acrylate and 0-1% of an external additive.
Preferably, in the raw material of the modified sulfur, the isooctyl acrylate accounts for 0.3-0.7% by mass.
More preferably, in the raw material of the modified sulfur, the isooctyl acrylate accounts for 0.3-0.5% by mass.
In the scheme, the external doping agent is formed by compounding zinc stearate and zinc hydroxystannate according to the mass ratio of 1 (1-2).
In the scheme, the preparation method of the modified sulfur comprises the following steps: uniformly mixing sulfur, dipentene, isooctyl acrylate and an external additive, heating to 130-170 ℃, reacting for 2-6 h, and cooling to room temperature to obtain the modified sulfur.
In the scheme, the asphalt is road petroleum asphalt.
In the scheme, the mineral aggregate comprises the following components in percentage by mass: 85-99% of aggregate and 1-10% of mineral powder.
In the scheme, the aggregate can be selected from one or more of common aggregates of road engineering such as basalt, limestone, glauconite, steel slag aggregate and the like, and the synthetic grading of the mineral aggregate meets the requirements of the recommended range of the current highway asphalt pavement construction technical specification in China; the filler can be mineral powder, cement, slaked lime, etc. ground by limestone.
Preferably, the mass percentage of the isooctyl acrylate in the modified sulfur raw material is 0.1-0.7%.
Preferably, the mass percentage of the external additive in the modified sulfur raw material is 0.1-1%.
More preferably, the sulfur composite modified asphalt mixture is mainly prepared from the following raw materials in parts by weight: 95 parts of mineral aggregate, 3.4 parts of asphalt and 1.4 parts of modified sulfur;
wherein the mineral aggregate accounts for the following percentage: 97% of aggregate and 3% of mineral powder;
the modified sulfur comprises the following components in percentage by weight: 97% of sulfur, 2% of dipentene, 0.5% of isooctyl acrylate and 0.5% of external admixture.
The preparation method of the water loss resistant sulfur modified asphalt mixture comprises the following steps:
1) weighing the raw materials according to the proportion;
2) drying the weighed aggregate, adding modified sulfur under the heating condition, and uniformly stirring; and sequentially adding asphalt and mineral powder, and uniformly stirring to obtain the water loss resistant sulfur modified asphalt mixture.
In the scheme, the heating temperature in the step 1) is 120-140 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the invention, the polymerization reaction is carried out on the sulfur, the dipentene and the isooctyl acrylate under the high-temperature condition, the sulfur micromolecules are connected into a macromolecule long chain, and the long chain is fully fused with the asphalt in the subsequent mixing process of the mixture and is wrapped on the surface of the mixture, so that the water stability performance of the mixture can be effectively improved; based on the functional group modification effect of the dipentene and the isooctyl acrylate, the water stability, the mechanical property and the high-temperature property of the obtained mixture can be synchronously improved;
2) the melting points of the dipentene, the isooctyl acrylate and the sulfur are not greatly different, and the substances can be better fused with each other under the high-temperature condition, so that the reaction is promoted to be more uniform and sufficient;
3) the water loss resistant sulfur modified asphalt mixture obtained by the invention can further obviously improve the water stability on the premise of maintaining and further effectively improving the good road performance of the sulfur modified asphalt mixture, and has important application and popularization significance;
4) the preparation method provided by the invention is simple, convenient to operate and suitable for popularization and application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following examples, the aggregate used was glauconite; the mineral aggregate synthetic grading is an AC13 class aggregate meeting the requirements of the recommended range of the current highway asphalt pavement construction technical specification in China; the filler is fine limestone ground mineral powder;
the adopted asphalt is matrix No. 70 asphalt;
in the following examples, the external doping agent used was compounded from zinc stearate and zinc hydroxystannate in a mass ratio of 1: 1.
Example 1
The preparation method of the water loss resistant sulfur modified asphalt mixture comprises the following steps:
1) preparing modified sulfur; weighing the components in proportion, wherein the components and the mass percentage of the components are as follows: 97.5 percent of sulfur, 2 percent of dipentene and 0.5 percent of external admixture; uniformly mixing the weighed sulfur, dipentene and the external doping agent, placing the mixture into a reaction kettle, heating the mixture to 170 ℃, keeping the temperature and reacting for 4 hours, and then cooling the mixture to room temperature to obtain modified sulfur:
2) preparing an asphalt mixture; weighing the raw materials according to the proportion, wherein the raw materials and the weight portions of the raw materials are as follows: 95 parts of mineral aggregate (97 percent of aggregate and 3 percent of mineral powder), 3.4 parts of asphalt and 1.4 parts of modified sulfur; drying the weighed aggregate in a drying oven at 140 ℃ for 4 hours, then pouring the dried aggregate into a stirring pot at 140 ℃, adding modified sulfur, and stirring for 60 seconds; adding asphalt and continuing stirring for 60 seconds;
adding mineral powder and continuing stirring for 120 seconds to obtain the water loss resistant sulfur modified asphalt mixture.
The results of the performance tests of the asphalt mixture obtained in this example are shown in Table 1.
Table 1 results of performance test of asphalt mixture obtained in example 1
Example 2
The preparation method of the water loss resistant sulfur modified asphalt mixture comprises the following steps:
1) preparing modified sulfur; weighing the components in proportion, wherein the components and the mass percentage of the components are as follows: 97 percent of sulfur, 2 percent of dipentene, 0.5 percent of isooctyl acrylate and 0.5 percent of external admixture; uniformly mixing the weighed sulfur, dipentene and the external doping agent, placing the mixture into a reaction kettle, heating the mixture to 170 ℃, keeping the temperature and reacting for 4 hours, and then cooling the mixture to room temperature to obtain modified sulfur:
2) preparing an asphalt mixture; weighing the raw materials according to the proportion, wherein the raw materials and the weight portions of the raw materials are as follows: 95 parts of mineral aggregate (97 percent of aggregate and 3 percent of mineral powder), 3.4 parts of asphalt and 1.4 parts of modified sulfur; drying the weighed aggregate in a drying oven at 140 ℃ for 4 hours, then pouring the dried aggregate into a stirring pot at 140 ℃, adding modified sulfur, and stirring for 60 seconds; adding asphalt and continuing stirring for 60 seconds; adding mineral powder and continuing stirring for 120 seconds to obtain the water loss resistant sulfur modified asphalt mixture.
The results of the performance tests of the asphalt mixture obtained in this example are shown in Table 2.
Table 2 results of performance test of asphalt mixture obtained in example 2
Example 3
The preparation method of the water loss resistant sulfur modified asphalt mixture is substantially the same as that of the embodiment 1, except that the modified sulfur comprises the following components in percentage by mass: 97.2 percent of sulfur, 2 percent of dipentene, 0.3 percent of isooctyl acrylate and 0.5 percent of external admixture.
The results of the performance tests of the obtained asphalt mixture are shown in Table 3.
Table 3 results of performance test of asphalt mixture obtained in example 3
Example 4
The preparation method of the water loss resistant sulfur modified asphalt mixture is substantially the same as that of the embodiment 1, except that the modified sulfur comprises the following components in percentage by mass: 96.8 percent of sulfur, 2 percent of dipentene, 0.7 percent of isooctyl acrylate and 0.5 percent of external admixture.
The results of the performance tests of the obtained asphalt mixture are shown in Table 4.
Table 4 results of performance test of asphalt mixture obtained in example 4
Comparative example 1
The preparation method of the common sulfur modified asphalt mixture is almost the same as that of the embodiment, except that sulfur is directly adopted to replace the modified sulfur in the embodiment 1; the results of the performance tests of the obtained asphalt mixture are shown in Table 5.
TABLE 5 results of the Performance test of the asphalt mixture obtained in comparative example 1
Comparative example 2
The preparation method of the common sulfur modified asphalt mixture is almost the same as that of the embodiment, except that sulfur is directly adopted to replace the modified sulfur in the embodiment 1; the results of the performance tests of the obtained asphalt mixture are shown in Table 6.
The preparation method of the water loss resistant sulfur modified asphalt mixture in the embodiment is substantially the same as that in the embodiment 1, except that the modified sulfur comprises the following components in percentage by mass: 96% of sulfur, 2% of dipentene, 1.5% of isooctyl acrylate and 0.5% of external admixture. The results of the performance tests of the obtained asphalt mixture are shown in Table 4.
The preparation method is similar to example 1.
Table 6 results of performance test of asphalt mixture obtained in comparative example 2
The above results show that: the water loss resistant sulfur modified asphalt mixture prepared by the scheme of the invention can obviously improve the water stability of the sulfur modified asphalt and synchronously ensure other service performances; particularly, when the mixing amount of the isooctyl acrylate is 0.5%, the soaking residual stability of the obtained asphalt mixture is up to 90.2%, the splitting strength is up to 1.35MPa, the freeze-thaw splitting strength ratio is up to 88.9%, the dynamic stability is up to 2852 times/mm, and the water stability, the mechanical property and the high-temperature property of the obtained asphalt mixture can be synchronously and obviously improved.
The above embodiments are merely examples for clearly illustrating the present invention and do not limit the present invention. Other variants and modifications of the invention, which are obvious to those skilled in the art and can be made on the basis of the above description, are not necessary or exhaustive for all embodiments, and are therefore within the scope of the invention.
Claims (10)
1. The water loss resistant sulfur modified asphalt mixture is characterized by comprising the following components in parts by weight: 95-100 parts of mineral aggregate, 1-5 parts of modified sulfur and 3-8 parts of asphalt; wherein the modified sulfur is prepared by polymerizing and modifying sulfur by utilizing dipentene and/or isooctyl acrylate.
2. The water damage resistant sulfur modified asphalt mixture according to claim 1, wherein the modified sulfur comprises the following raw materials by mass percent: 96-98% of sulfur, 1-2% of dipentene, 0-1% of isooctyl acrylate and 0-1% of an external additive.
3. The water damage resistant sulfur modified asphalt mixture according to claim 1, wherein the modified sulfur raw material comprises 0.1-0.7% by mass of isooctyl acrylate.
4. The water loss resistant sulfur modified asphalt mixture according to claim 2, wherein the external admixture is formed by compounding zinc stearate and zinc hydroxystannate according to a mass ratio of 1 (1-2).
5. The water damage resistant sulfur modified asphalt mixture according to claim 1, wherein the preparation method of the modified sulfur comprises the following steps: uniformly mixing sulfur, dipentene, isooctyl acrylate and an external additive, heating to 130-170 ℃, reacting for 2-6 h, and cooling to room temperature to obtain the modified sulfur.
6. The water damage resistant sulfur modified asphalt mixture according to claim 1, wherein the asphalt is one or more of road petroleum asphalt, polymer modified asphalt, lake asphalt and rock asphalt.
7. The water damage resistant sulfur modified asphalt mixture according to claim 1, wherein the mineral aggregate comprises the following components in percentage by mass: 85-99% of aggregate and 1-15% of mineral powder.
8. The water damage resistant sulfur modified asphalt mixture according to claim 7, wherein the aggregate is one or more of basalt, limestone, glauconite and steel slag aggregate; the filler is mineral powder, cement or slaked lime which is ground by limestone.
9. The preparation method of the water loss resistant sulfur-modified asphalt mixture as claimed in any one of claims 1 to 8, which is characterized by comprising the following steps:
1) weighing the raw materials according to the proportion;
2) drying the weighed aggregate, adding modified sulfur under the heating condition, and uniformly stirring; and sequentially adding asphalt and mineral powder, and uniformly stirring to obtain the water loss resistant sulfur modified asphalt mixture.
10. The method according to claim 9, wherein the heating temperature in the step 2) is 120 to 140 ℃.
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| CN118530001B (en) * | 2024-05-11 | 2024-12-17 | 武汉工程大学 | Asphalt mixture based on modified sulfur with water loss resistance and preparation method thereof |
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| CN113666667B (en) | 2022-12-09 |
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