CN118005322A - Multi-broken-stone high-viscosity asphalt concrete - Google Patents
Multi-broken-stone high-viscosity asphalt concrete Download PDFInfo
- Publication number
- CN118005322A CN118005322A CN202410212758.5A CN202410212758A CN118005322A CN 118005322 A CN118005322 A CN 118005322A CN 202410212758 A CN202410212758 A CN 202410212758A CN 118005322 A CN118005322 A CN 118005322A
- Authority
- CN
- China
- Prior art keywords
- viscosity
- asphalt
- modified
- aggregate
- asphalt concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 34
- 239000004575 stone Substances 0.000 title claims abstract description 31
- 239000010426 asphalt Substances 0.000 claims abstract description 119
- 239000000203 mixture Substances 0.000 claims abstract description 54
- 239000000178 monomer Substances 0.000 claims abstract description 53
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 21
- 239000011707 mineral Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004132 cross linking Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000010008 shearing Methods 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims abstract description 3
- 238000012258 culturing Methods 0.000 claims abstract description 3
- 230000008878 coupling Effects 0.000 claims description 40
- 238000010168 coupling process Methods 0.000 claims description 40
- 238000005859 coupling reaction Methods 0.000 claims description 40
- 150000001540 azides Chemical class 0.000 claims description 22
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 21
- 125000000304 alkynyl group Chemical group 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 13
- FYUZFGQCEXHZQV-UHFFFAOYSA-N triethoxy(hydroxy)silane Chemical compound CCO[Si](O)(OCC)OCC FYUZFGQCEXHZQV-UHFFFAOYSA-N 0.000 claims description 13
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 10
- 229910000104 sodium hydride Inorganic materials 0.000 claims description 10
- 239000012312 sodium hydride Substances 0.000 claims description 10
- PHCFIFIBAXEQFZ-UHFFFAOYSA-N bromo(triethoxy)silane Chemical compound CCO[Si](Br)(OCC)OCC PHCFIFIBAXEQFZ-UHFFFAOYSA-N 0.000 claims description 9
- IBGBGRVKPALMCQ-UHFFFAOYSA-N 3,4-dihydroxybenzaldehyde Chemical compound OC1=CC=C(C=O)C=C1O IBGBGRVKPALMCQ-UHFFFAOYSA-N 0.000 claims description 8
- PXIPVTKHYLBLMZ-UHFFFAOYSA-N Sodium azide Chemical compound [Na+].[N-]=[N+]=[N-] PXIPVTKHYLBLMZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000006959 Williamson synthesis reaction Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- ULTHEAFYOOPTTB-UHFFFAOYSA-N 1,4-dibromobutane Chemical compound BrCCCCBr ULTHEAFYOOPTTB-UHFFFAOYSA-N 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- PCYGLFXKCBFGPC-UHFFFAOYSA-N 3,4-Dihydroxy hydroxymethyl benzene Natural products OCC1=CC=C(O)C(O)=C1 PCYGLFXKCBFGPC-UHFFFAOYSA-N 0.000 claims description 4
- 229910008051 Si-OH Inorganic materials 0.000 claims description 4
- 229910006358 Si—OH Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000012650 click reaction Methods 0.000 claims description 4
- 238000006352 cycloaddition reaction Methods 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims description 4
- 238000002715 modification method Methods 0.000 claims description 4
- 238000006068 polycondensation reaction Methods 0.000 claims description 4
- -1 polysiloxane Polymers 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- YORCIIVHUBAYBQ-UHFFFAOYSA-N propargyl bromide Chemical compound BrCC#C YORCIIVHUBAYBQ-UHFFFAOYSA-N 0.000 claims description 4
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical group CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000001308 synthesis method Methods 0.000 claims description 4
- 230000002194 synthesizing effect Effects 0.000 claims description 4
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 claims description 4
- LEAQUNCACNBDEV-ZHACJKMWSA-N (e)-undec-1-en-1-ol Chemical compound CCCCCCCCC\C=C\O LEAQUNCACNBDEV-ZHACJKMWSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 238000006459 hydrosilylation reaction Methods 0.000 claims description 3
- 238000010534 nucleophilic substitution reaction Methods 0.000 claims description 3
- IVRMZWNICZWHMI-UHFFFAOYSA-N azide group Chemical group [N-]=[N+]=[N-] IVRMZWNICZWHMI-UHFFFAOYSA-N 0.000 claims description 2
- 125000000524 functional group Chemical group 0.000 claims description 2
- 238000012827 research and development Methods 0.000 abstract description 2
- 235000010755 mineral Nutrition 0.000 description 16
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 238000003786 synthesis reaction Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 8
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 238000005160 1H NMR spectroscopy Methods 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000002390 rotary evaporation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910021595 Copper(I) iodide Inorganic materials 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- LSXDOTMGLUJQCM-UHFFFAOYSA-M copper(i) iodide Chemical compound I[Cu] LSXDOTMGLUJQCM-UHFFFAOYSA-M 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 229920005594 polymer fiber Polymers 0.000 description 2
- 230000008707 rearrangement Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- GIEMHYCMBGELGY-UHFFFAOYSA-N 10-undecen-1-ol Chemical compound OCCCCCCCCCC=C GIEMHYCMBGELGY-UHFFFAOYSA-N 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of multi-macadam asphalt concrete research and development, and discloses multi-macadam high-viscosity asphalt concrete, wherein the raw materials used by the concrete are SHAC-13 multi-macadam high-viscosity modified asphalt mixture, which comprises high-viscosity modified asphalt, modified coarse aggregate Ca-alkynyl, modified fine aggregate Fa-N 3 and mineral powder; the preparation method of the high-viscosity modified asphalt comprises the following steps: the I-D SBS modified asphalt is heated to a flowing state, 0.5 to 8 weight percent of catechol end-capped crosslinking monomer is added in the stirring process, and the high-viscosity modified asphalt is prepared by shearing, culturing and stirring. The invention provides multi-broken stone high-viscosity asphalt concrete which can be applied to pavement engineering as a reliable and stable high-performance pavement structural layer.
Description
Technical Field
The invention relates to the technical field of multi-macadam asphalt concrete research and development, in particular to multi-macadam high-viscosity asphalt concrete.
Background
In China, a semi-rigid base asphalt pavement is mainly used as a typical structure, a design deflection value is used as a structural design control index, and the thickness of the pavement structure is calculated by adopting an elastic layered system theory under the action of double-circle uniform distribution load. In terms of concept, the existing design takes fatigue cracking of the pavement as a main disease mode, but the reality is that asphalt pavement has other two typical early diseases, namely rutting and water damage before fatigue cracking is not generated far, and the design does not play a role in controlling diseases at all. It can be seen from previous experience that hard asphalt concrete is superior to other types of asphalt concrete in rut resistance. In addition, from the economic aspect, the engineering cost can be reduced by adopting the hard asphalt mixture. Natural asphalt (e.g., teirida lake asphalt TLA) has found application in some highway engineering in China. The fiber is used as a high-strength, durable and light reinforcing material, can improve the mechanical property of the asphalt pavement and prolong the service life, and is mainly used in asphalt pavement engineering at present as wood fiber, polymer fiber and mineral fiber, wherein the polymer fiber is mainly used in important road sections and bridge deck pavement. Depending on different environmental, material and technical requirements, a wide variety of anti-rut agents are present on the market, such as foreign PR, china's rut king, etc.
Asphalt is used as an important binder for pavement, and has an important influence on the durability of the pavement. The aging process of the asphalt mixture mainly refers to aging of asphalt, which can lead to the hardening and adhesiveness of the asphalt to be reduced, and the overall performance of the asphalt pavement to be reduced. In the process of shaping an asphalt pavement, asphalt is also an important factor influencing the damage of the asphalt pavement against external loads. In the fatigue test, the quality of asphalt performance also directly affects the durability of asphalt mixtures in terms of fatigue. Therefore, the selection of the binder plays an important role in the durability of the asphalt pavement. Because PE, SBR and rubber powder modified asphalt have certain defects in high and low temperature performance compared with SBS modified asphalt, most of SBS modified asphalt is mainly adopted in the current design, and the asphalt has good viscoelasticity and can be used for both high and low temperature performance. However, the current design requirement is mainly I-D, I-C SBS modified asphalt, the index requirement of softening point not less than 60 ℃ is relatively low, and for a region with summer heat, the index can not fully meet the requirement of pavement high Wen Hangche. In addition, the asphalt mixture is relatively single in type, mainly adopts AC and SMA types, and is matched with the traditional modified asphalt, so that the oil-stone ratio of the asphalt mixture is difficult to improve. Increasing the thickness of the asphalt film tends to be beneficial to the durability improvement of the asphalt pavement, and the larger the thickness of the asphalt film is, the higher the free asphalt ratio in the asphalt film is. The free bitumen ratio determines the failure mechanism of the bitumen-aggregate interfacial phase. The lower the free asphalt ratio, the greater the adhesion failure ratio during interface failure; the higher the free asphalt ratio, the greater the adhesion failure ratio during interface failure. The fatigue performance of the mixture can be improved by properly increasing the content of free asphalt.
Disclosure of Invention
In order to improve the asphalt performance, ensure the mixing workability, void fraction, low-temperature performance and durability of the asphalt mixture and combine the test experience of the high-toughness ultrathin overlay technology, the invention develops the multi-broken stone high-viscosity asphalt concrete based on the SHAC-13 multi-broken stone high-viscosity modified asphalt mixture, which can provide a reliable and stable high-performance pavement structural layer.
The raw material of the multi-broken stone high-viscosity asphalt concrete is SHAC-13 multi-broken stone high-viscosity modified asphalt mixture, which comprises high-viscosity modified asphalt, modified coarse aggregate Ca-alkynyl, modified fine aggregate Fa-N 3 and mineral powder;
The preparation method of the high-viscosity modified asphalt comprises the following steps: the I-D SBS modified asphalt is heated to a flowing state, 0.5 to 8 weight percent of catechol end-capped crosslinking monomer is added in the stirring process, and the high-viscosity modified asphalt is prepared by shearing, culturing and stirring.
Preferably, the preparation method of the multi-broken stone high-viscosity asphalt concrete comprises the following steps:
step one: preparing an SHAC-13 multi-broken stone high-viscosity modified asphalt mixture;
Step two: preparing modified coarse aggregate Ca-alkynyl, wherein the modification method comprises the following steps: carrying out surface modification treatment on the coarse aggregate by utilizing an alkynyl coupling monomer, and carrying out polycondensation reaction on Si-OH generated by the inorganic-philic end of the alkynyl coupling monomer through hydrolysis on the surface of the coarse aggregate to generate a polysiloxane coupling layer, so as to form chemical adsorption, and generate hydrogen bonds and covalent bonds; the flexible organophilic end of the alkynyl coupling monomer and the alkynyl functional group are simultaneously modified on the surface of the coarse aggregate;
Step three: preparing modified fine aggregate Fa-N 3, wherein the modification method comprises the following steps: carrying out surface modification treatment on the fine aggregate by using an azide coupling monomer, and carrying out polycondensation reaction on Si-OH generated by the inorganic-philic end of the azide coupling monomer through hydrolysis on the surface of the fine aggregate to generate a polysiloxane coupling layer, so as to form chemical adsorption, and generate hydrogen bonds and covalent bonds; the flexible organophilic end and the azide functional group of the azide coupling monomer are simultaneously modified on the surface of the fine aggregate;
Step four: modifying the fine aggregate to the surface of the coarse aggregate by utilizing Cu (I) -catalyzed alkynyl-azido cycloaddition click reaction to prepare a pre-mixed aggregate;
Step five: heating the high-viscosity modified asphalt to 160-180 ℃, adding pre-mixed aggregate, mixing for 60-120 s, then adding mineral powder, and mixing for 45-70 s to obtain the multi-broken stone high-viscosity asphalt concrete.
Preferably, the synthesis method of the alkynyl coupling monomer comprises the following steps: the preparation method comprises the steps of synthesizing hydroxy triethoxysilane through hydrosilylation by taking triethoxysilane and undecenol as raw materials and chloroplatinic acid as a catalyst; the alkynyl coupling monomer is prepared by catalyzing 3-bromopropyne and hydroxy triethoxysilane to generate ether reaction by sodium hydride by utilizing a Williamson ether synthesis method.
Preferably, the synthesis method of the azide coupling monomer comprises the following steps: the Williamson ether synthesis method is utilized to catalyze 1, 4-dibromobutane and hydroxy triethoxysilane to generate ether reaction by sodium hydride so as to generate bromotriethoxysilane; based on nucleophilic substitution reaction mechanism, bromo-triethoxysilane is used as raw material to carry out azide reaction with sodium azide, thus obtaining the azide coupling monomer.
Preferably, the preparation method of the catechol terminated crosslinking monomer comprises the following steps: the catechol end-capped crosslinking monomer is prepared by using a schiff alkali reaction mechanism and using 1, 3-bis (3-aminopropyl) -1, 3-tetramethyl disiloxane as a raw material and 3, 4-dihydroxybenzaldehyde as an end-capping agent.
Preferably, the grading proportion of mineral materials in the multi-broken stone high-viscosity asphalt concrete is as follows: coarse aggregate with the particle size of 4.75 mm-16 mm: fine aggregate with particle size of 0.075 mm-4.75 mm: mineral powder=63%: 31.9%:5.1%;
preferably, the oil-stone ratio in the multi-broken stone high-viscosity asphalt concrete is 6.0.
The multi-broken stone high-viscosity asphalt concrete can be applied to pavement engineering.
Compared with the prior art, the invention has the following beneficial technical effects:
The invention comprises the following steps: firstly, synthesizing an alkynyl coupling monomer, an azide coupling monomer and a catechol end-capped crosslinking monomer, and performing high-viscosity modification treatment on asphalt by using the catechol end-capped crosslinking monomer;
Then carrying out surface modification treatment on the coarse aggregate by using an alkynyl coupling monomer, carrying out surface modification treatment on the fine aggregate by using an azide coupling monomer, and modifying the fine aggregate to the surface of the coarse aggregate by using an alkynyl-azide cycloaddition click reaction catalyzed by Cu (I), so as to prepare the pre-mixed aggregate;
The premixing and collecting: on one hand, the space rotation and secondary rearrangement effect of the aggregate under the wheel load effect are reduced, and on the other hand, the surface-modified flexible organophilic end is crosslinked and wound with asphalt molecules to generate stronger physical adsorption effect, so that the interface cohesiveness between the aggregate and asphalt is improved;
the high-quality asphalt concrete based on the research of skeleton compaction and high-viscosity modification can greatly improve the stability of an asphalt mixture structure by enhancing the skeleton embedding effect in the mixture and adopting a higher-grade asphalt cementing material, reduce the space rotation and secondary rearrangement effect of aggregates under the action of wheel load, and provide a reliable and stable high-performance pavement structure layer under the combined action of skeleton grading and special high-viscosity modified asphalt on the premise of ensuring that the mixture is fully compacted.
Drawings
FIG. 1 is a synthetic route to alkynyl coupling monomers;
FIG. 2 is a synthetic route to azide-coupled monomers;
FIG. 3 is a synthetic route to catechol-terminated crosslinking monomers;
FIG. 4 is a bar graph of the results of high and low temperature performance tests for different types of asphalt mixtures.
Detailed Description
Example 1:
The multi-broken stone high-viscosity asphalt concrete takes SHAC-13 multi-broken stone high-viscosity modified asphalt mixture as a raw material, and comprises high-viscosity modified asphalt, modified coarse aggregate Ca-alkynyl, modified fine aggregate Fa-N 3 and mineral powder;
Wherein, the technical indexes of the used aggregate and mineral powder meet the requirements specified in CJJ1-2008 of the specification of construction and quality acceptance of urban road engineering;
The mineral aggregate grading in the SHAC-13 multi-broken stone high-viscosity modified asphalt mixture is subjected to experimental study based on a skeleton compact structure of the mineral aggregate grading, and the asphalt mixture is of a skeleton structure because the asphalt dosage is increased by adopting high-viscosity modified asphalt, the thickness of the asphalt film is increased, the filling material dosage is properly reduced by checking through a skeleton compact structure checking method-VCADRU method, so that the proper filling of the asphalt mortar dosage is ensured, excessive expansion of gaps of the asphalt mixture by fine aggregates is avoided, and a proper void ratio (about 4 percent) is reserved; the performance index requirements of the high-viscosity modified asphalt are determined by combining the environmental temperature and the action load requirements, and the durability of the mixture is improved by comprehensively determining the high asphalt consumption;
and a comparative experiment was conducted on an AC-13C conventional asphalt mixture and a SAC-13 multi-macadam asphalt mixture;
Mineral aggregate grading compositions of the SHAC-13 multi-macadam high-viscosity modified asphalt mixture, the AC-13C traditional asphalt mixture and the SAC-13 multi-macadam asphalt mixture and design results of oil-stone ratios are shown in the following table 1;
table 1 mineral aggregate composition and oil-to-stone ratio of asphalt mixture
Note that: SBS I-D is I-D type SBS modified asphalt;
The preparation method of the high-viscosity modified asphalt comprises the following steps: heating the I-D type SBS modified asphalt to a flowing state, adding 3.5wt% of catechol end-capped crosslinking monomer (the chemical synthesis route of which is shown in figure 3) in the stirring process, firstly shearing for 2 hours at 5000r/min and 180 ℃, and then developing and stirring for 1.5 hours at 700r/min and 165 ℃ to prepare high-viscosity modified asphalt, wherein the performance detection results are shown in the following table 2;
TABLE 2 Performance test results of high viscosity modified asphalt and I-D type SBS modified asphalt
| Penetration of 0.1mm | Softening point/. Degree.C | Ductility (5 ℃ C.)/cm | Dynamic viscosity/Pa.s | |
| High-viscosity modified asphalt | 45 | 90 | 42 | 65400 |
| I-D type SBS modified asphalt | 53 | 72 | 43 | — |
Example 2:
a preparation method of multi-broken stone high-viscosity asphalt concrete comprises the following steps:
step one: preparing an SHAC-13 multi-broken stone high-viscosity modified asphalt mixture;
wherein, the mineral aggregate grading proportion is: coarse aggregate (particle size range 4.75 mm-16 mm): fine aggregate (particle size range 0.075mm to 4.75 mm): mineral powder=63%: 31.9%:5.1%;
The oil-stone ratio is 6.0;
step two: the specific experimental process for preparing the modified coarse aggregate Ca-alkynyl is as follows:
(1) Preparing a mixed solvent of absolute ethyl alcohol and deionized water, and adding an alkynyl coupling monomer (the chemical synthesis route of which is shown in figure 1) to obtain a mixed solution;
Wherein m (alkynyl coupling monomer): m (deionized water): m (absolute ethanol) =8: 42:50;
(2) Heating the mixed solution to 60 ℃, keeping the pH value at 9, stirring for 1h, cooling to room temperature, and standing for 1h;
(3) Soaking coarse aggregate (the grain size range is 4.75-16 mm) in the mixed solution for 1h, taking out the coarse aggregate, and curing at 150 ℃ for 2h to obtain modified coarse aggregate Ca-alkynyl;
step three: the specific experimental process for preparing the modified fine aggregate Fa-N 3 is as follows:
(1) Preparing a mixed solvent of absolute ethyl alcohol and deionized water, and adding an azide coupling monomer (the chemical synthesis route of which is shown in figure 2) to obtain a mixed solution;
Wherein m (azide coupling monomer): m (deionized water): m (absolute ethanol) =10: 45:45;
(2) Heating the mixed solution to 60 ℃, keeping the pH value at 10, stirring for 1h, cooling to room temperature, and standing for 1h;
(3) Soaking fine aggregate (the grain size range is 0.075 mm-4.75 mm) in the mixed solution for 1h, taking out the fine aggregate, and curing the fine aggregate at 140 ℃ for 2h to obtain modified fine aggregate Fa-N 3;
Step four: the fine aggregate is modified to the surface of the coarse aggregate by utilizing Cu (I) -catalyzed alkynyl-azido cycloaddition click reaction to prepare the pre-mixed aggregate, and the concrete experimental process is as follows: immersing the modified fine aggregate Fa-N 3 and the modified coarse aggregate Ca-alkynyl in methanol, stirring for 0.5h, then adding 7wt% of cuprous iodide and dimethylformamide (m (cuprous iodide): m (dimethylformamide) =1:9), and reacting for 3h at 70 ℃ to obtain a pre-mixed aggregate;
Step five: heating the high-viscosity modified asphalt to 170 ℃, adding pre-mixed aggregate, mixing for 90s, adding mineral powder, and mixing for 60s to obtain the multi-broken stone high-viscosity asphalt concrete.
Example 3:
The alkynyl coupling monomer was prepared as shown in fig. 1, and its synthesis process was as follows:
the first step: the preparation method comprises the steps of synthesizing hydroxy triethoxysilane through hydrosilylation by taking triethoxysilane and undecenol as raw materials and chloroplatinic acid as a catalyst;
Specific experimental procedure for the synthesis of hydroxy triethoxysilane: adding 10mL of undecylenic alcohol and 3 drops of chloroplatinic acid-isopropanol solution (the preparation method comprises the steps of adding 0.3g of H 2PtCl·6H2 O into 10mL of anhydrous isopropanol, fully stirring, completely dissolving, keeping away from light, standing for 1 d), adding into a three-necked bottle provided with a stirrer, a reflux condenser and a dropping funnel, starting stirring, heating, dropping 9.5mL of triethoxysilane by using the dropping funnel when the temperature is increased to 80 ℃, controlling the dropping speed (1 d/2 s), stirring at 90 ℃ for 3h after the dropping is finished, and distilling under reduced pressure to remove low-boiling-point materials to obtain the hydroxy triethoxysilane;
and a second step of: preparing an alkynyl coupling monomer by catalyzing 3-bromopropyne and hydroxy triethoxysilane to generate an ether reaction through sodium hydride by utilizing a Williamson ether synthesis method;
specific experimental procedure for the synthesis of alkynyl coupling monomers: under ice bath conditions, 1.5g of sodium hydride is firstly dissolved in 60mL of anhydrous tetrahydrofuran, then 40mL of anhydrous tetrahydrofuran in which 10g of hydroxy triethoxysilane is dissolved is dropwise added to the solution, the dropping speed is controlled (1 d/2 s), then 2.6mL of 3-bromopropyne is dropwise added to the mixed solution, the dropping speed is controlled (1 d/5 s), after the dropwise addition is finished, the reaction product is stirred at room temperature for 12h, byproducts and unreacted sodium hydride are removed from a column of neutral alumina, diatomite and active carbon, liquid is collected, rotary evaporation is carried out to remove the tetrahydrofuran, and ethyl acetate is used for: purifying petroleum ether (V/V=1/6) by a column to obtain an alkynyl coupling monomer;
1H NMR(400MHz,CDCl3,δ,ppm)：0.71-0.76(t,2H),1.20-1.24(t,9H),1.25-1.35(m,14H),1.48-1.61(m,4H),2.50-2.52(t,1H),3.54-3.57(t,2H),3.78-3.82(m,6H),4.16-4.17(d,2H).
the azide coupling monomer was prepared as shown in fig. 2, and the synthesis process was as follows:
The first step: the Williamson ether synthesis method is utilized to catalyze 1, 4-dibromobutane and hydroxy triethoxysilane to generate ether reaction by sodium hydride so as to generate bromotriethoxysilane;
specific experimental procedure for the synthesis of bromotriethoxysilane: under ice bath conditions, 1.5g of sodium hydride is firstly dissolved in 60mL of anhydrous tetrahydrofuran, then 40mL of anhydrous tetrahydrofuran in which 10g of hydroxy triethoxysilane is dissolved is dropwise added into the solution, the dropping speed is controlled (1 d/2 s), then 5mL of 1, 4-dibromobutane is dropwise added into the mixed solution, the dropping speed is controlled (1 d/5 s), after the dropping is finished, the reaction product is stirred at room temperature for 10h, byproducts and unreacted sodium hydride are removed from the reaction product in a column of neutral alumina, diatomite and active carbon, liquid is collected, the tetrahydrofuran and the 1, 4-dibromobutane are removed by rotary evaporation, and ethyl acetate is used for: purifying petroleum ether (V/v=4/5) by a column to obtain bromotriethoxysilane;
and a second step of: based on nucleophilic substitution reaction mechanism, taking bromotriethoxysilane as raw material, and performing azide reaction with sodium azide to prepare an azide coupling monomer;
Specific experimental procedure for the synthesis of azide-coupled monomers: 7.02g of bromotriethoxysilane and 1.46g of sodium azide are dissolved in 100mLN, N-dimethylformamide, reflux reaction is carried out for 12 hours at 80 ℃, diethyl ether is used for extraction, organic phases are combined, distilled water is used for washing the organic phases, anhydrous magnesium sulfate is used for drying, solvent is removed by rotary evaporation, petroleum ether is used as eluent, and the azide coupling monomer is obtained through column purification;
1H NMR(400MHz,CDCl3,δ,ppm)：0.64-0.68(t,2H),1.19-1.23(t,9H),1.23-1.33(m,14H),1.51-1.79(m,8H),3.30-2.33(t,2H),3.40-3.44(m,4H),3.78-3.84(m,6H).
The catechol end-capped crosslinking monomer is prepared by the following synthesis process: the catechol end-capped crosslinking monomer is prepared by using a schiff alkali reaction mechanism and using 1, 3-bis (3-aminopropyl) -1, 3-tetramethyl disiloxane as a raw material and 3, 4-dihydroxybenzaldehyde as an end-capping agent;
Specific experimental procedure for the synthesis of catechol-terminated crosslinking monomers: under the protection of nitrogen, adding 2.76g of 3, 4-dihydroxybenzaldehyde and 40mL of absolute ethyl alcohol into a three-mouth bottle, after complete dissolution, dropwise adding 2.75mL of 1, 3-bis (3-aminopropyl) -1, 3-tetramethyl disiloxane dissolved in 30mL of absolute ethyl alcohol into the three-mouth bottle by using a dropping funnel, controlling the dropping speed (1 d/3 s), simultaneously adding water generated in the anhydrous magnesium sulfate absorption reaction, reacting for 8 hours at 45 ℃ after the dropwise adding is finished, filtering to remove magnesium sulfate at normal pressure, collecting filtrate, and rotationally steaming to remove solvent to obtain catechol end-capped crosslinking monomer;
1H NMR(400MHz,CDCl3,δ,ppm)：0.11(s,12H),0.79-0.84(t,4H),1.62-1.70(m,4H),3.46-3.49(t,4H),6.81-7.14(m,6H),8.24(s,2H).
performance test experiment:
(I) performing a rutting test according to JTG E20-2011 of the Highway engineering asphalt and asphalt mixture test procedure to research the high temperature stability of SHAC-13 multi-macadam high viscosity modified asphalt mixture, AC-13C traditional asphalt mixture and SAC-13 multi-macadam asphalt mixture, wherein the rutting test results are shown in the following table 3;
Table 3 rutting test results of asphalt concrete test pieces
The following conclusion was drawn by analyzing the rut test results of table 3:
(1) When the asphalt performance is the same and only the mineral aggregate grade is changed, because SAC-13 coarse aggregate occupies relatively high, under the condition that the asphalt mixture is ensured to be compact by increasing the mineral powder consumption, the dynamic stability at 60 ℃ can be properly improved, but the test environment temperature is improved, because asphalt tends to 'plastic flow' at the softening point temperature, irreversible deformation is formed under the repeated action of load, and the problem of high-temperature rut resistance cannot be solved only by adjusting the mineral aggregate grading;
(2) Compared with the traditional modified asphalt mixture, the anti-rutting performance of the SHAC-13 multi-macadam high-viscosity modified asphalt mixture which is independently researched and developed by the invention is obviously improved, the dynamic stability has a obvious decreasing trend along with the increase of the test environment temperature, the value of 2800 times/mm which is required by the relative standard is slightly lower at 70 ℃, but the deformation is obviously reduced compared with the traditional modified asphalt mixture, and the improvement is 3-4 times.
Secondly, according to a bending creep test of the T0728-2000 asphalt mixture, the low temperature performance of the SHAC-13 multi-macadam high viscosity modified asphalt mixture, the AC-13C traditional asphalt mixture and the SAC-13 multi-macadam asphalt mixture is researched, and the experimental results are shown in the following table 4;
TABLE 4 Low temperature bending test results for asphalt concrete test pieces
| Type of mix | Low temperature bending failure strain (mu epsilon) |
| AC-13C | 2536 |
| SAC-13 | 2682 |
| SHAC-13 | 3213 |
The test data according to tables 3 and 4 are plotted in fig. 4, and the following conclusion is drawn by analyzing fig. 4:
(1) The skeleton structure of the SHAC-13 multi-broken stone high-viscosity modified asphalt mixture realizes the embedding and extrusion effect between aggregates, and the high-temperature rutting resistance of the asphalt mixture can be obviously improved by matching with the effect of the high-viscosity modified asphalt;
(2) Compared with the traditional asphalt mixture, the thickness of the asphalt film is obviously improved, and the durability of the asphalt mixture can be improved; the power viscosity of asphalt at 60 ℃ is greatly improved, the asphalt consumption can be obviously improved, the toughness and low-temperature crack resistance of an asphalt mixture are ensured by rich asphalt systems in a mixture system, and compared with the low-temperature performance of the traditional mixture, the toughness and low-temperature crack resistance of the asphalt mixture are greatly improved; the dense structure of the framework ensures the void ratio of the asphalt mixture and can avoid water damage caused by rain infiltration.
Claims (8)
1. The multi-broken stone high-viscosity asphalt concrete is characterized in that the raw materials used by the concrete are SHAC-13 multi-broken stone high-viscosity modified asphalt mixture, and the multi-broken stone high-viscosity modified asphalt mixture comprises high-viscosity modified asphalt, modified coarse aggregate Ca-alkynyl, modified fine aggregate Fa-N 3 and mineral powder;
The preparation method of the high-viscosity modified asphalt comprises the following steps: the I-D SBS modified asphalt is heated to a flowing state, 0.5 to 8 weight percent of catechol end-capped crosslinking monomer is added in the stirring process, and the high-viscosity modified asphalt is prepared by shearing, culturing and stirring.
2. The multi-macadam high-viscosity asphalt concrete according to claim 1, wherein the preparation method of the multi-macadam high-viscosity asphalt concrete comprises the following steps:
step one: preparing an SHAC-13 multi-broken stone high-viscosity modified asphalt mixture;
Step two: preparing modified coarse aggregate Ca-alkynyl, wherein the modification method comprises the following steps: carrying out surface modification treatment on the coarse aggregate by utilizing an alkynyl coupling monomer, and carrying out polycondensation reaction on Si-OH generated by the inorganic-philic end of the alkynyl coupling monomer through hydrolysis on the surface of the coarse aggregate to generate a polysiloxane coupling layer, so as to form chemical adsorption, and generate hydrogen bonds and covalent bonds; the flexible organophilic end of the alkynyl coupling monomer and the alkynyl functional group are simultaneously modified on the surface of the coarse aggregate;
Step three: preparing modified fine aggregate Fa-N 3, wherein the modification method comprises the following steps: carrying out surface modification treatment on the fine aggregate by using an azide coupling monomer, and carrying out polycondensation reaction on Si-OH generated by the inorganic-philic end of the azide coupling monomer through hydrolysis on the surface of the fine aggregate to generate a polysiloxane coupling layer, so as to form chemical adsorption, and generate hydrogen bonds and covalent bonds; the flexible organophilic end and the azide functional group of the azide coupling monomer are simultaneously modified on the surface of the fine aggregate;
Step four: modifying the fine aggregate to the surface of the coarse aggregate by utilizing Cu (I) -catalyzed alkynyl-azido cycloaddition click reaction to prepare a pre-mixed aggregate;
Step five: heating the high-viscosity modified asphalt to 160-180 ℃, adding pre-mixed aggregate, mixing for 60-120 s, then adding mineral powder, and mixing for 45-70 s to obtain the multi-broken stone high-viscosity asphalt concrete.
3. The multi-macadam high-viscosity asphalt concrete according to claim 2, wherein the synthesis method of the alkynyl coupling monomer is as follows: the preparation method comprises the steps of synthesizing hydroxy triethoxysilane through hydrosilylation by taking triethoxysilane and undecenol as raw materials and chloroplatinic acid as a catalyst; the alkynyl coupling monomer is prepared by catalyzing 3-bromopropyne and hydroxy triethoxysilane to generate ether reaction by sodium hydride by utilizing a Williamson ether synthesis method.
4. The multi-macadam high-viscosity asphalt concrete according to claim 2, wherein the synthesis method of the azide coupling monomer is as follows: the Williamson ether synthesis method is utilized to catalyze 1, 4-dibromobutane and hydroxy triethoxysilane to generate ether reaction by sodium hydride so as to generate bromotriethoxysilane; based on nucleophilic substitution reaction mechanism, bromo-triethoxysilane is used as raw material to carry out azide reaction with sodium azide, thus obtaining the azide coupling monomer.
5. The multi-macadam high-viscosity asphalt concrete according to claim 1, wherein the preparation method of the catechol-terminated crosslinking monomer is as follows: the catechol end-capped crosslinking monomer is prepared by using a schiff alkali reaction mechanism and using 1, 3-bis (3-aminopropyl) -1, 3-tetramethyl disiloxane as a raw material and 3, 4-dihydroxybenzaldehyde as an end-capping agent.
6. The multi-macadam high-viscosity asphalt concrete according to any one of claims 1 to 5, wherein the mineral aggregate gradation ratio of the multi-macadam high-viscosity asphalt concrete is: coarse aggregate with the particle size of 4.75 mm-16 mm: fine aggregate with particle size of 0.075 mm-4.75 mm: mineral powder=63%: 31.9%:5.1%.
7. The multi-rubble, high viscosity asphalt concrete according to any one of claims 1 to 5, wherein the ratio of oil to stone in the multi-rubble, high viscosity asphalt concrete is 6.0.
8. Use of a multi-rubble high viscosity asphalt concrete according to any of claims 1-5 in road engineering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410212758.5A CN118005322A (en) | 2024-02-27 | 2024-02-27 | Multi-broken-stone high-viscosity asphalt concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410212758.5A CN118005322A (en) | 2024-02-27 | 2024-02-27 | Multi-broken-stone high-viscosity asphalt concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118005322A true CN118005322A (en) | 2024-05-10 |
Family
ID=90950257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410212758.5A Pending CN118005322A (en) | 2024-02-27 | 2024-02-27 | Multi-broken-stone high-viscosity asphalt concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118005322A (en) |
-
2024
- 2024-02-27 CN CN202410212758.5A patent/CN118005322A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Preparation and characterization of waterborne epoxy modified bitumen emulsion as a potential high-performance cold binder | |
| CN109627794B (en) | Modified rubber asphalt and preparation method thereof | |
| WO2011134367A1 (en) | Rubber asphalt and preparation method thereof | |
| CN102746473B (en) | Method for preparing hyperbranched polysiloxane grafted carbon nanotube containing active double bonds | |
| CN111825388B (en) | Modified epoxy asphalt concrete and processing technology thereof | |
| CN109456604A (en) | A kind of high-performance modified emulsified asphalt and preparation method thereof | |
| CN107163214B (en) | Enhanced cross-linked polyurethane elastomer and preparation method thereof | |
| CN101798203A (en) | Directly-mixed rubber asphalt mixture and production method thereof | |
| CN113880522A (en) | Pervious concrete and preparation method thereof | |
| CN105254828A (en) | Cage-shaped oligomerization silsesquioxane hybridized phenolic resin with eight phenolic hydroxyl groups and preparation method thereof | |
| CN104497603A (en) | Water-borne epoxy composite-containing emulsified asphalt cold-recycling agent and preparation method thereof | |
| CN112280322A (en) | MXene modified color asphalt binder and preparation method thereof | |
| CN109180071B (en) | High-performance cold-mix mixture for road surface layer and preparation method thereof | |
| Kezhen et al. | Effects of the chemical structure of curing agents on rheological properties and microstructure of WER emulsified asphalt | |
| CN110643185A (en) | Reaction type high-viscosity liquid asphalt and preparation method and application thereof | |
| Hao et al. | The modification mechanisms of silane coupling agent (SCA) on the physical properties of thermosetting polyurethane asphalt binder (PUAB) | |
| CN111138877A (en) | High-viscosity modified asphalt and preparation method thereof | |
| CN107382149B (en) | A kind of construction of the highway bituminous concrete and preparation method thereof | |
| CN100417614C (en) | Modified mineral aggregate for bituminous pavement and method for producing same | |
| CN118005322A (en) | Multi-broken-stone high-viscosity asphalt concrete | |
| CN1323103C (en) | Ball-shaped organic silicon bubber products and its preparation process | |
| CN109762352A (en) | A kind of epoxy resin modified asphalt and preparation method | |
| CN115233514B (en) | Self-healing pavement structure and preparation method thereof | |
| CN114180896B (en) | Cement stabilized macadam base composition and preparation and construction process thereof | |
| CN100554334C (en) | A kind of method of improving performance of diatomite modified asphalt material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |