I-Rubber powder modified bitumen (i-BitumenRubber, ebizwa ngokuba yi-AR) luhlobo olutsha lwezinto ezihlanganisiweyo eziphezulu. Luhlobo olutsha lodidi oluphezulu oluphezulu olwenziwe ngumgubo werabha owenziwe ngamathayi enkunkuma, eyongezwa njengesilungisi kwisiseko sebhitumene. Yenziwa ngoluhlu lwezenzo ezifana nokushisa okuphezulu, izongezo kunye nokuxuba i-shear kwisixhobo esikhethekileyo esikhethekileyo. Izinto eziphathekayo. Inokwandisa ubomi benkonzo yendawo yendlela, ukunciphisa ingxolo, ukunciphisa ukungcangcazela, ukuphucula ukuzinza kwe-thermal kunye nokuqhekeka kwe-thermal, kunye nokuphucula ukuxhathisa i-icing. Ngaphantsi kwesenzo esidityanisiweyo sebhitumene yetrafikhi enzima, inkunkuma yerabha engumgubo kunye nezixube, umgubo werabha ufunxa iireyini, iihydrocarbons kunye nezinye izinto eziphilayo kwibhitumene, kwaye zenze uthotho lotshintsho lomzimba kunye neekhemikhali ukunyakamisa kunye nokwandisa umgubo werabha. I-viscosity iyanda, i-softening point iyanda, kunye ne-viscosity, ukuqina, kunye ne-elasticity ye-rubber kunye ne-bitumen ithathelwa ingqalelo, ngaloo ndlela iphucula ukusebenza kwendlela ye-rubber bitumen.
"I-rubber powder modified bitumen" ibhekisela kumgubo werabha owenziwe ngamatayara alahlwayo, owongezwa njengesilungisi kwisiseko sebhitumene. Yenziwa ngoluhlu lwezenzo ezifana nokushisa okuphezulu, izongezo kunye nokuxuba i-shear kwisixhobo esikhethekileyo esikhethekileyo. izinto ezincamathelayo.
Umgaqo wokuguqulwa kwebhitumene yomgubo werabha yinto elungisiweyo yebhitumene yesamente eyenziwe kukudumba okupheleleyo phakathi kwamasuntswana omgubo werabha wethaya kunye nebhitumene ye-matrix phantsi kweemeko ezixutywe ngokupheleleyo zobushushu obuphezulu. Ibhitumene eguquliweyo yomgubo werabha iphucule kakhulu ukusebenza kwesiseko sebhitumene, kwaye ingaphezulu kwebhitumene elungisiweyo eyenziwe ngezilungisi ezisetyenziswa ngoku ngokuqhelekileyo ezifana ne-SBS, SBR, EVA, njl. Ngenxa yokusebenza kwayo okugqwesileyo kunye negalelo elikhulu ekukhuselweni kwendalo, ezinye iingcali. Ukuqikelela ukuba i-rubber powder modified bitumen kulindeleke ukuba ithathe indawo yebhitumene eguquliweyo ye-SBS.
inzuzo

Ipowder yerabha inokongezwa kwibhitumene ekwakhiweni kweendlela kunye ne-expressways. Esi sicelo sasingajoliswanga njengendawo yokuphuma yokusetyenziswa kwamatayara enkunkuma, kodwa kunokuphucula iimpawu zebhitumene ukuya kwinqanaba elifana nelo lomgangatho ophezulu webhitumene equlethe iielastomer ezintsha. Iinzuzo zokongeza i-rubber powder kwi-bitumen zibandakanya ukunciphisa ukuthambekela kwendlela yokuqhekeka (ngokukodwa kwiindawo ezibandayo), ukuphucula ukuqina kwendlela, ukuxhathisa kwamanzi kunye nokuzinza kwegrabile. Ibhitumene eguqulwe irabha yomelele ngakumbi, ihlala iminyaka esixhenxe ubude kunemixube yebhitumene yesintu.?
Irabha esetyenziselwa ibhitumene elungisiweyo yipolima enwebekayo kakhulu. Ukongeza umgubo werabha we-vulcanized kwisiseko sebhitumene unokufikelela okanye ugqithise umphumo ofanayo ne-styrene-butadiene-styrene block copolymer modified bitumen. Iimpawu ze-rubber powder modified bitumen ziquka:
1. Ukungena kunciphisa, i-softening point iyanda, kwaye i-viscosity iyanda, ebonisa ukuba ukuzinza okuphezulu kwe-bitumen kuphuculwe, kwaye kunokuphucula i-rutting and pushing phenomena endleleni ngexesha lokuqhuba kwehlobo.
2. Ubushushu bobushushu buyancipha. Xa iqondo lokushisa liphantsi, i-bitumen iba yi-brittle, ibangela uxinzelelo oluqhekezayo kwi-pavement; xa iqondo lobushushu liphezulu, i-pavement iba thambileyo kwaye ikhubazeke phantsi kweempembelelo zezithuthi ezithweleyo. Emva kokuguqulwa ngepowder yerabha, ukuvakalelwa kweqondo lokushisa kwe-bitumen kuphuculwe kwaye ukuchasana nokuhamba kwayo kuphuculwe. I-viscosity coefficient ye-rubber powder modified bitumen inkulu kune-bitumen yesiseko, ebonisa ukuba i-bitumen eguquliweyo inokuchasana okuphezulu kwi-deformation deformation.
3. Ukusebenza kweqondo lokushisa eliphantsi kuphuculwe. I-powder ye-rubber inokuphucula i-ductility ephantsi ye-bitumen kunye nokwandisa ukuguquguquka kwe-bitumen.
4. Ukubambelela okuphuculweyo. Njengoko ubukhulu befilimu yebhitumene yerabha ebambelele kumphezulu wamatye inyuka, ukuchasana kwe-bitumen kwi-pavement kumonakalo wamanzi kunokuphuculwa kwaye ubomi bendlela bunokwandiswa.
5. Nciphisa ungcoliseko lwengxolo.
6. Ukwandisa ukubamba phakathi kwamatayara esithuthi kunye nomphezulu wendlela kunye nokuphucula ukhuseleko lokuqhuba.
ukusilela
Nangona kunjalo, ukusetyenziswa kwe-rubber powder ngale ndlela kwandisa ixabiso le-bitumen, kwaye ukongezwa kwe-rubber powder kwi-bitumen kwenza umxube we-bitumen ube nzima ukuphatha (ulula ukunamathela) kunye nokwandisa ixesha lokusebenza. Ngamanye amaxesha i-bitumen equkethe inani elikhulu le-rubber powder kulula ukubamba umlilo ngexesha lokunyibilika, ngoko kuyacetyiswa ukuba umxholo we-rubber powder kwi-rubber modified bitumen kufuneka ube ngaphantsi kwe-10%.