Uchungechunge lwe-webinar oluvela ku-National Asphalt Pavement Association lusethelwe ukugqamisa izinzuzo zale nto eguqukayo
Ukugaywa kabusha kwamasondo kuyinqubo yokuguqula ukuphela kwempilo noma amathayi amadala angafuneki abe into engasetshenziswa emikhiqizweni emisha.Amathayi okuphela kwempilo ngokuvamile aba amakhandidethi okugaywa kabusha lapho engasasebenzi ngenxa yokuguga noma onakele futhi engasakwazi ukunyathelwa kabusha noma ukugxunyekwa kabusha.
Ngokwemboni yamasondo, ukugaywa kabusha kwamasondo kuyindaba eyimpumelelo enkulu.Isitokwe samasondo alahliwe sehlile sisuka ngaphezu kwebhiliyoni ngo-1991 saya ezigidini ezingama-60 ngo-2017 futhi imboni yetiyela iyisici esikhulu ekunciphiseni inani lamathayi ezindaweni zokulahla imfucumfucu.
Izicelo zenjoloba ephansi zibalelwa ku-25% wokusetshenziswa kwamasondo alahliwe ngo-2017. Irabha yaphansi isetshenziselwa ukukhiqiza inani lemikhiqizo kodwa ukusetshenziswa okukhulu kwenjoloba yaphansi irabha yetiyela, isebenzisa cishe amaphawundi ayizigidi ezingu-220 noma amathayi ayizigidi ezingu-12 ngonyaka.Abasebenzisi abakhulu benjoloba ye-asphalt yizifunda zaseCalifornia nase-Arizona, kulandele iFlorida, nokusetshenziswa okulindeleke ukuthi kukhule nakwezinye izifundazwe.
Irabha yesondo egaywe kabusha (RTR) ephuma kumathayi alahlwayo isetshenziswe embonini yokugandaya itiyela kusukela ngeminyaka yawo-1960.I-RTR isetshenziswe njenge-asphalt binder modifier kanye nesengezo sengxube ye-asphalt emixubeni yetiyela ene-gap-graded kanye ne-open-graded kanye nokwelashwa kwendawo.
Irabha yesondo egaywe kabusha ngokuyisisekelo iyirabha yesondo egaywe yaba yizinhlayiya ezincane kakhulu ukuze zisetshenziswe njengesilungisi setiyela.Ukwengeza irabha yamathayi aphansi ku-asphalt kungaba nomthelela ekuthuthukisweni ukumelana nokugqwala, ukumelana nokushibilika, ikhwalithi yokugibela, impilo yokuhamba ngezinyawo kanye namazinga omsindo omgwaqo ophansi.Ukwengeza irabha oketshezini lwe-asphalt kubambezela ukuguga kanye ne-oxidation ye-binder ewumphumela, okwandisa impilo yomgwaqo ngokunciphisa ukubola nokuqhekeka.
Ukuphathwa nokucwiywa kwamathayi kuyinqubo ehlelwe kahle futhi eqashwe ngeso lokhozi ukuze kukhiqizwe impahla yenjoloba ehlanzekile futhi engaguquki kakhulu.Irabha ye-crumb ikhiqizwa ngenqubo yokugaya amathayi enjoloba abe yizinhlayiya ezincane kakhulu.
Phakathi nenqubo, ucingo oluqinisa isondo kanye nemicu kuyasuswa.Insimbi isuswa ngozibuthe futhi i-fiber isuswa yi-aspiration.Ukucubungula amathayi kusetshenziswa i-cryogenic fracturing kubandakanya ukusika izingcezu zamasondo ezinkulu zibe yizinhlayiya ezincane, ngokuvamile ezingama-50 mm, kusetshenziswa izisiki zensimbi ezibukhali.Lezi zingcezu ezincane zibe seziqandisiwe futhi ziyaphuka.Izinhlayiya zenjoloba ziyahlungwa futhi zihlukaniswe zibe izingxenye ezihlukene zosayizi, njengoba kuchazwe ikhasimende.Izinhlayiya zenjoloba eziwumphumela zilingana ngokulinganayo futhi zihlanzeke kakhulu.Amasistimu okufaka amasaka azenzakalelayo asiza ukuqinisekisa izisindo ezifanele zezikhwama futhi asuse ukungcoliswa okuphambene.
I-National Asphalt Pavement Association (NAPA), izobe isingathe i- Where the Rubber Meets the Road Webinar Series kuleli hlobo ngenjoloba yamasondo egaywe kabusha kanye ne-asphalt.
Isikhathi sokuthumela: Jun-19-2020