Roj hmab hmoov hloov bitumen (BitumenRubber, hu ua AR) yog ib yam tshiab ntawm cov khoom zoo sib xws. Nws yog ib hom tshiab ntawm cov khoom zoo sib xyaw ua los ntawm cov roj hmab hmoov ua los ntawm cov log tsheb khib nyiab, uas tau ntxiv los ua kev hloov kho rau hauv paus bitumen. Nws yog tsim los ntawm kev ua yeeb yam xws li kub kub, tshuaj ntxiv thiab shear sib xyaw hauv cov cuab yeej tshwj xeeb tshwj xeeb. Khoom siv. Nws tuaj yeem txuas ntxiv kev pab cuam lub neej ntawm txoj kev nto, txo suab nrov, txo kev co, txhim kho thermal stability thiab thermal cracking, thiab txhim kho icing kuj. Nyob rau hauv kev sib xyaw ua ke ntawm cov tsheb thauj neeg hnyav, cov khib nyiab roj hmab hmoov thiab cov khoom sib xyaw, cov roj hmab hmoov absorbs resins, hydrocarbons thiab lwm yam organic teeb meem nyob rau hauv bitumen, thiab undergoes ib tug series ntawm lub cev thiab tshuaj hloov mus moisten thiab nthuav cov roj hmab hmoov. Lub viscosity nce, lub softening taw tes nce, thiab viscosity, toughness, thiab elasticity ntawm roj hmab thiab bitumen raug coj mus rau hauv tus account, yog li txhim kho txoj kev ua tau zoo ntawm roj hmab bitumen.
"Rubber hmoov hloov bitumen" yog hais txog cov roj hmab hmoov uas ua los ntawm cov log tsheb khib nyiab, uas tau ntxiv los ua ib qho kev hloov kho rau lub hauv paus bitumen. Nws yog tsim los ntawm kev ua yeeb yam xws li kub kub, tshuaj ntxiv thiab shear sib xyaw hauv cov cuab yeej tshwj xeeb tshwj xeeb. adhesive khoom.
Lub hauv paus ntsiab lus ntawm kev hloov kho cov roj hmab hmoov hloov bitumen yog ib qho kev hloov kho bitumen cementing khoom tsim los ntawm tag nrho cov o cov tshuaj tiv thaiv ntawm cov log tsheb roj hmab hmoov hais thiab matrix bitumen nyob rau hauv tag nrho cov high-temperature tej yam kev mob. Roj hmab hmoov hloov bitumen tau zoo heev txhim kho kev ua tau zoo ntawm lub hauv paus bitumen, thiab yog superior rau hloov bitumen ua los ntawm tam sim no siv modifiers xws li SBS, SBR, EVA, thiab lwm yam. Nyob rau hauv view ntawm nws zoo heev kev ua tau zoo thiab zoo pab rau ib puag ncig tiv thaiv, qee cov kws txawj. kwv yees tias roj hmab hmoov hloov bitumen yuav tsum hloov SBS hloov bitumen.
qhov zoo

Roj hmab hmoov tuaj yeem muab ntxiv rau bitumen hauv kev tsim kho txoj kev thiab kev nthuav dav. Daim ntawv thov no tsis yog pib tsim los ua qhov hluav taws xob rau kev siv cov log tsheb khib nyiab, tab sis yog txhawm rau txhim kho cov khoom ntawm bitumen mus rau qib zoo ib yam li cov khoom zoo bitumen uas muaj cov elastomers tshiab. Qhov zoo ntawm kev ntxiv roj hmab hmoov rau bitumen suav nrog txo txoj kev nyiam ntawm txoj kev tawg (tshwj xeeb tshaj yog nyob rau hauv qhov chaw txias), txhim kho txoj kev ruaj khov, nws cov dej tsis kam thiab kev ruaj ntseg ntawm cov pob zeb. Roj hmab-hloov bitumen yog qhov ruaj khov dua, kav ntev li ntawm xya xyoo ntev dua li cov tsoos bitumen sib tov.?
Cov roj hmab siv rau kev hloov kho bitumen yog ib qho zoo heev elastic polymer. Ntxiv vulcanized roj hmab hmoov rau lub hauv paus bitumen tuaj yeem ua tiav lossis txawm tias ntau dua cov nyhuv tib yam li styrene-butadiene-styrene thaiv copolymer hloov bitumen. Cov yam ntxwv ntawm roj hmab hmoov hloov bitumen muaj xws li:
1. Qhov kev nkag mus tau qis dua, qhov taw tes softening nce, thiab viscosity nce, qhia tau hais tias qhov kub thiab txias stability ntawm bitumen tau txhim kho, thiab nws tuaj yeem txhim kho qhov rutting thiab thawb phenomena ntawm txoj kev thaum lub caij ntuj sov tsav tsheb.
2. Qhov kub thiab txias yog txo. Thaum qhov kub thiab txias yog qhov tsawg, cov bitumen ua nkig, ua rau muaj kev ntxhov siab tawg hauv cov pavement; Thaum qhov kub thiab txias, cov pavement yuav mos thiab deforms nyob rau hauv lub zog ntawm cov tsheb nqa nws. Tom qab kev hloov kho nrog cov hmoov roj hmab, qhov kub thiab txias ntawm cov bitumen tau txhim kho thiab nws cov dej ntws tau zoo tuaj. Lub viscosity coefficient ntawm cov roj hmab hmoov hloov bitumen yog ntau dua li ntawm lub hauv paus bitumen, qhia tau hais tias cov hloov bitumen muaj siab dua tiv thaiv ntws deformation.
3. Kev ua haujlwm kub qis yog txhim kho. Roj hmab hmoov tuaj yeem txhim kho qhov kub thiab txias ductility ntawm bitumen thiab ua kom yooj yim ntawm bitumen.
4. Txhim kho adhesion. Raws li lub thickness ntawm cov roj hmab bitumen zaj duab xis adhered rau saum npoo ntawm lub pob zeb nce, lub bitumen pavement tsis kam mus rau dej puas yuav tsum tau txhim kho thiab txoj kev lub neej yuav txuas ntxiv mus.
5. Txo cov suab nrov.
6. Ua kom tuav ntawm lub tsheb log tsheb thiab txoj kev nto thiab txhim kho kev nyab xeeb ntawm kev tsav tsheb.
ua tsis tau
Txawm li cas los xij, kev siv cov hmoov roj hmab hauv txoj kev no nce nqi ntawm bitumen, thiab ntxiv cov roj hmab hmoov rau bitumen ua rau cov bitumen sib tov nyuaj dua (yooj yim rau lo) thiab ua kom lub sijhawm ua haujlwm. Qee lub sij hawm bitumen uas muaj cov hmoov roj hmab ntau yog ib qho yooj yim kom ntes hluav taws thaum lub sij hawm yaj, yog li nws pom zoo tias cov ntsiab lus ntawm cov roj hmab hauv cov roj hmab hloov bitumen yuav tsum tsawg dua 10%.