Synergy Effect Of Nano-Organic Palygorskite Ntawm Cov Khoom Ntawm Lub Hnub Qub SBS-Modified Asphalt Part 2

3.3. Water Stability of A-Pal-Compounded SBS-Modified Asphalt

Lub kaum sab xis ntawm cov dej ntshiab, formamide, thiab ethylene glycol ntawm asphalt fluctuates nyob rau hauv txawv degrees (Table 5). Lub zog tsis muaj zog thiab nws cov khoom hauv cov qauv hloov pauv asphalt tau suav los ntawm OWRK txoj kev (Table 6). Piv nrog rau cov txiaj ntsig ntawm SBS-hloov asphalt, lub zog tsis muaj zog ntawm A-Pal-sib xyaw SBS-hloov asphalt ua ke nrog cov polar tivthaiv tau nce. Lub dispersion tivthaiv thawj zaug nce thiab ces ntog. Kev ua haujlwm ntawm adhesion ntawm A-Pal-compounded SBS-hloov asphalt ncav cuag qhov siab tshaj plaws nrog A-Pal tus nqi ntawm 1 wt feem pua, uas yog 15.6 feem pua ​​​​siab dua li ntawm asphalt nyuam qhuav hloov nrog SBS. A-Pal nta cov qauv fibrous, uas tuaj yeem faib tsis tu ncua hauv kev hloov kho asphalt, tiv thaiv qhov tshwm sim ntawm asphalt tawg, thiab ua kom dej ruaj khov. Raws li cov ntsiab lus A-Pal nce, cov ntaub ntawv fiber ntau nano yuav tshwm sim raws li qhov sib txawv tsis sib xws nrog qis dispersion [34].

Glycoside ntawm cistanche tuaj yeem ua rau muaj kev ua haujlwm ntawm SOD hauv plawv thiab daim siab cov ntaub so ntswg, thiab txo cov ntsiab lus ntawm lipofuscin thiab MDA hauv txhua cov ntaub so ntswg, tshem tawm ntau yam reactive oxygen radicals (OH-, H₂O₂, thiab lwm yam) thiab tiv thaiv DNA puas. los ntawm OH-radicals. Cistanche phenylethanoid glycosides muaj peev xwm tshem tawm cov dawb radicals, muaj peev xwm txo tau ntau dua li cov vitamin C, txhim kho cov haujlwm ntawm SOD hauv cov phev ncua, txo cov ntsiab lus ntawm MDA, thiab muaj qee yam kev tiv thaiv ntawm cov phev ua haujlwm. Cistanche polysaccharides tuaj yeem txhim kho kev ua haujlwm ntawm SOD thiab GSH-Px hauv erythrocytes thiab ntsws cov ntaub so ntswg ntawm cov nas senescent sim los ntawm D-galactose, nrog rau txo cov ntsiab lus ntawm MDA thiab collagen hauv lub ntsws thiab ntshav, thiab nce cov ntsiab lus ntawm elastin, muaj Cov nyhuv scavenging zoo ntawm DPPH, ncua lub sijhawm ntawm hypoxia hauv cov nas senescent, txhim kho cov haujlwm ntawm SOD hauv cov ntshav, thiab ncua lub physiological degeneration ntawm lub ntsws hauv kev sim cov nas nrog cellular morphological degeneration, kev sim tau pom tias Cistanche muaj peev xwm antioxidant zoo. thiab muaj peev xwm los ua ib qho tshuaj tiv thaiv thiab kho cov kab mob ntawm daim tawv nqaij laus. Nyob rau tib lub sijhawm, echinacoside hauv Cistanche muaj lub peev xwm tseem ceeb txhawm rau txhawm rau DPPH dawb radicals thiab muaj peev xwm tshem tawm cov pa oxygen reactive thiab tiv thaiv dawb radical-induced collagen degradation, thiab kuj muaj kev kho zoo ntawm thymine dawb radical anion puas.

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Lub adhesion ntawm asphalt nrog cov zaub mov tuaj yeem qhia tau los ntawm kev ua haujlwm ntawm adhesion, uas tuaj yeem cuam tshuam txog kev tiv thaiv dej. Kev ua haujlwm ntawm adhesion tau suav nrog lub kaum sab xis ntawm kev sib cuag thiab lub zog tsis muaj zog los ntawm Equation (3), qhia hauv daim duab 3. Thaum SBS-hloov asphalt tau muab sib xyaw nrog 1 wt feem pua ​​​​A-Pal, kev ua haujlwm ntawm adhesion ntawm kev hloov kho asphalt thiab cov kuaj peb cov khoom ntxhia tau txhim kho. Ntawm peb cov minerals, cov alkaline limestone muaj qhov zoo tshaj plaws adhesion rau cov compound-hloov asphalt, tab sis qhov sib ntxiv ntawm A-Pal muab kev txhim kho zoo tshaj plaws rau adhesion nrog cov kua qaub aggregate granite. Qhov sib ntxiv ntawm A-Pal txhim kho kev sib cuam tshuam ntawm asphalt thiab aggregate thiab txhim kho cov nyhuv adhesion, uas zoo ib yam li lwm cov kev tshawb fawb [10]. Nrog rau kev nce ntxiv ntawm A-Pal, kev ua haujlwm ntawm adhesion ntawm A-Pal-compounded SBS-hloov asphalt thiab peb cov ntaub ntawv ntxhia tau pom qhov sib txawv ntawm kev poob qis. Qhov sib ntxiv ntawm A-Pal feem ntau cuam tshuam rau cov khoom tawg hauv lub zog dawb ntawm SBS-hloov asphalt, thiab cov nyhuv ntawm cov polar tivthaiv tsis pom tseeb [35]. Yog li ntawd, kev cuam tshuam ntawm kev hloov kho asphalt ntawm limestone nrog lub zog polarity tsis muaj zog. Nrog rau qhov nce ntxiv ntawm A-Pal, qhov tsis sib xws agglomeration phenomenon cuam tshuam rau adhesion rau hloov asphalt. Nrog rau cov ntsiab lus nce, kev ua haujlwm adhesion txuas ntxiv txo qis, thiab kev ua haujlwm adhesion poob qis.

Kev ua haujlwm ntawm tev (Wasw) qhia txog tus nqi ntawm asphalt spontaneously spals los ntawm cov pob zeb hauv av. Lub Wasw yog qhov ntxeev ntawm Gibbs dawb lub zog hloov. Qhov loj dua Wasw yog, qhov ceev ntawm asphalt peels tawm ntawm qhov chaw ntawm cov khoom ntxhia, thiab cov dej puas sai sai tshwm sim. Lub Wasw yog xam los ntawm Equation (5), thiab cov txiaj ntsig tau pom nyob rau hauv daim duab 4. Cov alkaline aggregate limestone muaj peev xwm los tiv thaiv flaking zoo dua thiab muaj zog dej puas tsuaj nyob rau hauv qhov kev xeem ntau yam. Nws tau raug hais nyob rau hauv ntau cov kev tshawb fawb kev tshawb fawb uas alkaline aggregate muaj kev sib raug zoo nrog asphalt, thiab pom tseeb anti-spalling nyhuv [18,20,27]. Rau qhov sib txawv ntawm A-Pal, cov nyhuv ntawm A-Pal-compounded SBS-hloov asphalt thiab ntxhia cov ntaub ntawv ntawm kev ua haujlwm exfoliation tsis pom tseeb. Kev ua haujlwm tev tawm yog tib yam nrog rau txhua qhov tshuaj.

3.4. Kev laus Resistance ntawm A-Pal-Compounded SBS-Modified Asphalt

3.4.1. Short-Term Aging Analysis

Cov qauv asphalt tom qab TFOT tau soj ntsuam los ntawm MLR thiab ∆S thiab tau qhia hauv daim duab 5. Lub MLR ntawm kev hloov kho asphalt nrog A-Pal cov ntsiab lus ntawm 5 wt feem pua ​​yog 0.202 feem pua , uas yog 55.9 feem pua ​​qis dua li ntawm SBS-hloov asphalt. Cov adsorption thiab shielding ntawm A-Pal ntawm lub teeb Cheebtsam ntawm asphalt txo lub thermal volatilization ntawm lub hauv paus asphalt thiab muaj ib tug pom tseeb nyhuv ntawm kev txhim kho lub sij hawm luv luv aging, uas muaj ib tug zoo xws li anti-aging mechanism rau av nplaum minerals nyob rau hauv asphalt [32,35. ]. Nrog rau qhov nce ntxiv ntawm A-Pal, ∆S tshwm sim thawj zaug thiab tom qab ntawd nce. Cov ∆S nrog A-Pal cov ntsiab lus ntawm 1 wt feem pua ​​​​tau qhia qhov tsawg kawg nkaus tus nqi ntawm −0.3 ◦C, uas tej zaum yuav yog vim qhov sib ntxiv ntawm A-Pal uas ua rau SBS decomposition thaum lub sij hawm luv luv.

Lub rheological Performance index RAI thiab ZSVAI tau siv los ntsuas qhov cuam tshuam ntawm asphalt (Daim duab 6 thiab Table 7). Vim qhov tshwj xeeb ntawm A-Pal-compounded SBS-hloov asphalt, cov polymer decomposed thiab viscosity poob thaum lub sij hawm kev laus. Lub caij no, cov qauv colloidal ntawm asphalt nws tus kheej kuj tau yooj yim cuam tshuam los ntawm kev laus, xws li sol mus rau gel, thiab rheological zog ntawm asphalt kuj yuav hloov [36]. Ob qhov ntsuas tau pom zoo ib yam li cov ntsiab lus nce ntawm A-Pal, thiab cov qauv nrog 1 wt feem pua ​​​​ntawm A-Pal qhia tau hais tias cov cuab yeej tiv thaiv kev laus zoo dua.

3.4.2. Long-Term Aging Analysis

Kev laus mus sij hawm ntev hauv PAV ntawm 100 ◦C raws li teev tseg los ntawm AASHTO R28-09 tau ua kom nkag siab txog cov thermal decomposition ntawm SBS ntawm qhov kub siab [30]. Kev suav cov txiaj ntsig ntawm RAI thiab ZSVAI tau pom nyob rau hauv daim duab 7 thiab Table 8, raws li, thiab ob qhov ntsuas tau pom zoo ib yam, tab sis cuam tshuam rau cov txiaj ntsig kev laus luv luv. Tom qab kev laus mus ntev, RAI qhov tseem ceeb ntawm kev hloov kho asphalt nrog 3 wt feem pua ​​​​thiab 5 wt feem pua ​​​​A-Pal compounded ntawm tib qhov kub thiab txias tau qis dua li ntawm SBS-hloov asphalt, thiab asphalt nrog 5 wt feem pua ​​A-Pal featured. qhov qis tshaj RAI, qhia txog qhov zoo tshaj plaws los tiv thaiv kev laus. Qhov saum npoo ntawm SBS hauv kev hloov kho asphalt tau coated nrog cov ntxhia hloov pauv ntawm A-Pal raws li qhov cuam tshuam, uas tuaj yeem tsis tsuas yog txo cov thermal aging ntawm asphalt matrix tab sis kuj tuaj yeem txo cov kev laus decomposition ntawm SBS. Hauv kev tshawb fawb yav dhau los, thaum cov pob zeb hloov pauv tau siv rau asphalt, qhov tshwj xeeb geometric txwv ncua kev laus ntawm asphalt, uas qhia tau tias A-Pal tau txais txiaj ntsig zoo rau asphalt raws li kev hloov pauv [19].

3.4.3. Anti-Fatigue Performance Analysis

Cov txiaj ntsig kev qaug zog ntawm A-Pal-compounded SBS-hloov asphalt yog qhia nyob rau hauv Table 9. Asphalt cov qauv uas muaj qhov qis qis dua qhov tseem ceeb ntawm qhov kub thiab txias feature zoo dua qaug zog. A-Pal tuaj yeem cuam tshuam qhov ua rau qaug zog rau qee yam. Qhov 3 wt feem pua ​​​​ntawm APal-compounded SBS-hloov asphalt nta qhov ua rau qaug zog qis dua thiab ua rau qaug zog zoo dua. Qhov sib ntxiv ntawm A-Pal tuaj yeem tiv thaiv kev loj hlob ntawm SBS, thiab txhawb kev sib xyaw asphalt sib xyaw ua ke, ua rau muaj zog tiv thaiv kev qaug zog [35].

3.5. Tsawg-kub ruaj khov ntawm A-Pal-Compounded SBS-Modified Asphalt

Tom qab TFOT ntxiv rau PAV kev laus, A-Pal-compounded SBS-hloov asphalt tau siv rau kev ntsuas qhov kub thiab txias. Kev xeem BBR tau ua tiav ntawm 0, −6, −12, −18, thiab −24 ◦C rau txhua qhov nyiaj ntawm A-Pal-compounded SBS-hloov asphalt nrog tus nqi nkag M tus nqi qhia hauv daim duab 8 . Qhov siab dua tus nqi nkag M tus nqi hauv cov khoom siv asphalt, qhov me dua qhov tensile kev nyuaj siab hauv cov khoom, thiab qhov zoo dua qhov kub-kub tawg kuj nyob rau hauv SHRP. A-Pal-compounded SBS-hloov asphalt nta M tus nqi siab dua li SBS-hloov asphalt ntawm qhov ntsuas kub ntawm 0, −6, −12, thiab −18 ◦C, qhia tau zoo dua yooj yooj yim thiab tawg tsis kam. . Thaum tus nqi M siab dua 0.3, tus nqi nkag M tus nqi nce ntxiv raws li cov ntsiab lus A-Pal nce. Asphalt cov ntaub ntawv nthuav tawm nkig thiab tawv, thiab cov kab nrib pleb yuav ua phem dua thaum khoov creep nruj ntawm cov khoom loj heev (tsawg dua 300 MPa ntawm 60 s, Daim duab 8b) [37]. Vim hais tias ntawm fibrous ib-dimensional nano-mineral, A-Pal muab ib tug tej yam ntxiv dag zog nyob rau hauv asphalt, hloov asphalt yuav nkig ntau thiab creep stiffness ntawm A-Pal-compounded SBS-hloov asphalt yog siab dua nyob rau hauv ib tug tej yam ntau yam. Qhov tawv tawv ntawm txhua qhov ntawm A-Pal-compounded SBS-hloov asphalt tsis tau hloov, qhov tseem ceeb tseem tshuav nyob rau tib theem hauv qhov ntsuas kub ntawm 0, −6, thiab −12 ◦C, thiab tseem ua tau raws li qhov yuav tsum tau ua kom nruj. Qhov sib ntxiv ntawm A-Pal tau muab qee yam kev txhim kho hauv qhov kev ua haujlwm kub qis ntawm lub hnub qub zoo li SBS-hloov asphalt.

4. Cov lus xaus

Daim ntawv no tsuas yog kawm txog cov khoom thiab cov txheej txheem ntawm nano-organic palygorskite compounded lub hnub qub zoo li SBS-hloov asphalt. Kev ua tau zoo ntawm asphalt matrix feem ntau yog txhim kho los ntawm SBS thiab, thib ob, ntxiv nrog A-Pal. A-Pal pab txhim kho qhov o ntawm SBS polymer thiab txhim kho qhov sib xws ntawm polymer hauv asphalt, thiab kev sib raug zoo ntawm SBS polymer nrog asphalt tau txhim kho rau qee qhov. Qhov ntsuas kub tseem ceeb ntawm rutting yam ntawm 5 wt feem pua ​​​​A-Pal-compounded SBS-hloov asphalt yog 20.8 feem pua ​​​​siab dua li ntawm SBS-hloov asphalt, uas muaj txiaj ntsig zoo rau kev txhim kho nws qhov kub thiab txias thiab tiv thaiv rutting zog. . Ntxiv qhov tsim nyog ntawm A-Pal rau SBS-hloov asphalt tuaj yeem ua rau cov adhesion ntawm kev hloov kho asphalt rau aggregates thiab dej stability ntawm asphalt sib tov. Tsis tas li ntawd, A-Pal tuaj yeem txo ob qho tib si thermal aging ntawm asphalt matrix thiab kev laus decomposition ntawm lub hnub qub zoo li SBS, thiab nws cov kev laus kuj nce ntxiv nrog cov ntsiab lus nce. Kev ua tau zoo ntawm 1 wt feem pua ​​​​A-Pal-compounded SBS-hloov asphalt muaj dej ruaj khov thiab kev laus ua haujlwm luv luv thiab muaj kev txhim kho me ntsis hauv qhov kub thiab txias thiab kev ua haujlwm qis.

Tus sau kev koom tes:Conceptualization, JJ, SL, thiab YG; methodology, SL, thiab YG; software, GQ; validation, JJ, thiab GQ; kev soj ntsuam, YG, SL, thiab YW; kev tshawb nrhiav, YG, thiab QG; cov ntaub ntawv, JJ; data curation, HC, thiab HL; kev sau ntawv—kev npaj ua ntej, SL, thiab YW; sau ntawv- tshuaj xyuas thiab kho, YG, JJ thiab XL; kev pom, GQ; saib xyuas, JJ; project tswj, JJ; Kev nrhiav nyiaj txiag RL thiab JJ Txhua tus kws sau ntawv tau nyeem thiab pom zoo rau cov ntawv luam tawm ntawm cov ntawv sau.

Nyiaj txiag: Txoj haujlwm no tau txais kev txhawb nqa los ntawm National Natural Science Foundation of China (51704040, 5200041650), Huxiang Young Talents Program (2020RC3039), Kev cob qhia rau Cov Hluas Innovators ntawm Changsha (kq2009014), Science thiab Technology Youth Talent Support Project ntawm Tuam Tshoj Association, Hunan Provincial Natural Science Foundation ntawm Tuam Tshoj (2020JJ5736), Scientific Research Fund ntawm Hunan Provincial Education Department (19A022), Open Project of State Key Laboratory of Environment-friendly Energy Materials (19kfhg12) thiab Key Research and Development Program of Hunan Province (2019SK2171) .

Cov ntaub ntawv muaj nyob:Cov ntaub ntawv nyoos tuaj yeem muab rho tawm los ntawm cov duab qhia hauv SI lossis muaj los ntawm cov kws sau ntawv raws li kev thov.

Kev tsis sib haum xeeb ntawm kev txaus siab:Cov kws sau ntawv tshaj tawm tsis muaj kev sib cav txog kev txaus siab.

Cov ntaub ntawv

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