1. Inkcazo ye-rubber powder modified bitumen
I-Rubber powder modified bitumen (i-bitumen Rubber, ebizwa ngokuba yi-AR) luhlobo olutsha lwemathiriyeli ehlanganisiweyo ekumgangatho ophezulu. 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 enkunkuma, 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.
2. Iimpawu ze-rubber powder modified bitumen
Irabha esetyenziselwa ibhitumene elungisiweyo yipolima enwebekayo kakhulu. Ukongeza i-rubber ye-vulcanized powder kwi-bitumen yesiseko inokufezekisa okanye ide idlule isiphumo esifanayo ne-styrene-butadiene-styrene block copolymer modified bitumen. Iimpawu ze-rubber powder modified bitumen ziquka:
2.1. Ukungena kuyancipha, i-softening point iyanda, kwaye i-viscosity iyanda, ebonisa ukuba ukuzinza okuphezulu kwe-bitumen kuphuculwe, kwaye i-rutting and pushing phenomena yendlela ehlotyeni iyaphuculwa.
2.2. 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 kwepowder 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.
2.3. Ukusebenza kobushushu obuphantsi kuphuculwe. I-powder ye-rubber inokuphucula i-ductility ephantsi ye-bitumen kunye nokwandisa ukuguquguquka kwe-bitumen.
2.4. Ukubambelela okuphuculweyo. Njengoko ubukhulu befilimu yebhitumene yerabha ebambelele kumphezulu wamatye inyuka, ukuchasana kwe-bitumen kwi-pavement kumonakalo wamanzi kunokuphuculwa kwaye ubomi bendlela bunokwandiswa.
2.5. Nciphisa ungcoliseko lwengxolo.
2.6. Ukwandisa ukubamba phakathi kwamatayara ezithuthi kunye nomphezulu wendlela kunye nokuphucula ukhuseleko lokuqhuba.