Cov roj hmab granule yog cov khoom tseem ceeb uas tau los ntawm cov txheej txheem rov siv cov log tsheb pov tseg, ua lub hauv paus tseem ceeb ntawm kev pov tseg roj hmab thiab kev siv cov khoom siv rov qab. Tsis zoo li cov khoom siv roj hmab nyoos, cov roj hmab granule siv cov log tsheb pov tseg, uas muaj ntau thiab pheej yig, ua rau lawv zoo tagnrho rau ntau yam kev siv hauv kev lag luam thiab kev siv pej xeem. Kev tsim cov roj hmab granule muaj ntau kauj ruam nyuaj suav nrog kev txiav cov log tsheb, kev sib cais hlau hlau, kev tsoo roj hmab, kev tshem tawm cov khoom tsis huv thiab kev ntsuas qib. Kev txiav cov log tsheb rhuav cov log tsheb loj pov tseg ua cov roj hmab me me rau kev ua tiav tom qab; kev sib cais hlau hlau tshem tawm cov khoom hlau uas nyob hauv cov log tsheb los ntawm kev siv tshuab sib nqus kom ntseeg tau tias cov roj hmab huv; kev tsoo roj hmab txo cov roj hmab ua cov khoom me me; kev tshem tawm cov khoom tsis huv tshem tawm cov khib nyiab seem xws li fiber thiab hmoov av; kev ntsuas qib faib cov khoom me me rau hauv ntau yam kev qhia raws li qhov xav tau ntawm kev siv. Txhua kauj ruam tau tsim los ua tib zoo los khaws cov roj hmab qhov elasticity thiab kev tiv thaiv kev hnav thaum tsim cov khoom sib xws uas ua tau raws li cov qauv siv sib txawv. Cov roj hmab granule cov yam ntxwv tshwj xeeb, xws li kev nqus tau zoo heev, kev ua haujlwm tiv thaiv kev plam thiab kev tiv thaiv corrosion muaj zog, ua rau lawv siv tau ntau yam hauv ntau qhov chaw dhau ntawm kev lag luam ib txwm muaj.

Kev lag luam siv cov log tsheb pov tseg rov qab siv dua feem ntau siv cov roj hmab granules ua cov khoom tseem ceeb, vim tias lawv txo qhov kev nyuaj siab ntawm ib puag ncig los ntawm kev pov tseg thiab hlawv log tsheb - ob txoj hauv kev pov tseg uas feem ntau ua rau muaj kuab paug thiab pov tseg cov khoom siv. Thaum lub sijhawm siv dua, cov roj hmab granules nrog cov khoom sib txawv raug tsim los ua kom haum rau ntau yam kev xav tau: cov roj hmab granules zoo, nrog cov khoom me me thiab sib npaug, yog qhov tsim nyog rau kev sib xyaw nrog lwm cov ntaub ntawv xws li polymers thiab bitumen los txhim kho kev ua haujlwm ntawm cov khoom, thaum cov roj hmab granules ntxhib, nrog cov khoom loj dua thiab qhov nyuaj dua, feem ntau siv rau kev sau thiab padding hauv cov haujlwm tsim kho. Cov roj hmab granules rov siv dua kuj qhia txog kev sib raug zoo zoo nrog cov polymers, bitumen thiab concrete, ua rau lawv siv dav hauv kev tsim cov ntaub ntawv sib xyaw thiab kev tsim kho ntawm ntau yam qauv, yog li nthuav lawv cov ntawv thov hauv kev tsim kho thiab kev tsim khoom. Ntau lub tuam txhab tswj hwm pov tseg tsom mus rau kev ua kom zoo dua cov txheej txheem tsim khoom, xws li kev txhim kho cov khoom siv crushing thiab kev txhim kho qhov tseeb ntawm qib, los txhim kho cov roj hmab granule thiab zoo, xyuas kom meej tias cov txheej txheem rov siv dua yog ua haujlwm tau zoo thiab txhim khu kev qha.

Kev kho dua tshiab ntawm qhov chaw ua si yog lwm qhov tseem ceeb uas cov roj hmab ua lub luag haujlwm tseem ceeb. Cov chaw ua si qub thiab txoj kev khiav feem ntau raug kev puas tsuaj los ntawm kev hnav ntawm qhov chaw, tawg thiab poob ntawm kev nqus vim yog kev siv ntev thiab kev puas tsuaj ntuj, thiab cov roj hmab ua cov khoom zoo tshaj plaws rau kev kho dua tshiab vim lawv cov yam ntxwv tshwj xeeb. Thaum siv rau cov kev khiav rov ua dua tshiab, cov roj hmab feem ntau sib xyaw nrog cov polyurethane binders los ua qhov chaw ntom thiab ywj uas txo qhov cuam tshuam rau cov khoom siv ua si, txo qhov hnav thiab rhuav ntawm cov khoom siv, thiab txhim kho kev nyab xeeb ntawm cov chaw ua si. Hauv kev kho dua tshiab ntawm cov nyom dag rau cov chaw ua si football thiab chaw ua si, cov roj hmab siv ua cov khoom siv los kho cov nyom fiber kom ncaj - tiv thaiv cov fibers kom tsis txhob raug tiaj los ntawm kev taug kev ntau zaus - thiab txhim kho qhov mos ntawm qhov chaw, muab kev paub txog kev ua si zoo dua thiab muaj kev nyab xeeb dua. Cov roj hmab xim, uas tau ua tiav los ntawm kev ntxiv cov xim zoo rau ib puag ncig, kuj tau siv dav hauv kev kho dua tshiab ntawm qhov chaw ua si. Lawv tuaj yeem siv los tsim ntau yam qauv thiab cov xim thaiv kom rov ua kom qhov chaw zoo nkauj thaum tswj kev tiv thaiv huab cua zoo heev thiab kev ruaj khov UV, kom ntseeg tau tias cov xim tsis ploj yooj yim hauv qab lub hnub ci ntev. Cov haujlwm kho dua tshiab siv cov roj hmab granules feem ntau yuav tsum tau xaiv cov khoom siv nruj kom ntseeg tau tias cov roj hmab granules ua tau raws li cov qauv ib puag ncig thiab kev ua tau zoo, xws li kev hloov pauv tsawg thiab kev tiv taus hnav siab.

Kev lag luam kuj pom kev siv cov roj hmab granules ntau zuj zus, nrog rau lawv cov khoom siv tau siv tag nrho hauv ntau yam kev tsim khoom thiab kev ua haujlwm. Hauv kev tsim cov lev thiab cov ncoo hauv kev lag luam, cov roj hmab granules raug sib xyaw nrog cov khoom siv hluavtaws xws li PVC thiab EVA los tsim cov khoom uas muaj kev nqus dej zoo dua thiab txo suab nrov. Cov khoom no siv dav hauv cov chaw tsim khoom, tsev rau khoom thiab chaw xa khoom - piv txwv li, muab tso rau hauv qab cov tshuab hnyav kom txo kev co thiab suab nrov, lossis siv ua cov lev tiv thaiv kev qaug zog rau cov neeg ua haujlwm sawv ntev. Cov roj hmab granules kuj tseem ntxiv rau cov txheej tiv thaiv dej kom txhim kho kev ywj pheej ntawm txheej thiab kev tiv thaiv tawg, ua rau cov txheej tiv thaiv hloov kho rau qhov deformation me ntsis ntawm cov qauv tsev yam tsis muaj tawg, yog li ua kom lub neej ua haujlwm ntawm cov txheej tiv thaiv dej hauv tsev ntev dua. Hauv kev kho txoj kev, cov roj hmab granules sib xyaw nrog asphalt siv rau kev kho qhov pothole thiab kev kaw qhov chaw. Cov khoom sib xyaw muaj kev sib txuas zoo rau qhov chaw ntawm txoj kev qub, tuaj yeem sau cov potholes sai sai thiab kaw cov kab nrib pleb, tiv thaiv kom dej nag tsis txhob nkag mus rau hauv txoj kev thiab ua rau muaj kev puas tsuaj ntxiv rau qhov chaw ntawm txoj kev. Cov ntawv thov kev lag luam no siv tag nrho cov roj hmab granules cov khoom siv lub cev, coj cov txiaj ntsig kev lag luam rau cov lag luam los ntawm kev txo cov nqi kho thiab txhim kho kev ua haujlwm zoo thaum daws cov teeb meem hauv kev tsim khoom thiab kev ua haujlwm.

Cov roj hmab sib txawv muaj cov yam ntxwv sib txawv uas hloov kho rau cov kev siv tshwj xeeb, ua tau raws li ntau yam kev xav tau ntawm ntau yam kev lag luam. Cov roj hmab siv dua tshiab, ua los ntawm cov log tsheb pov tseg, pheej yig thiab sib haum xeeb zoo nrog feem ntau cov ntaub ntawv, yog li lawv siv dav hauv kev sau thiab kev tsim kho xws li kev sau txoj kev thiab kev tsim kho lub hauv paus. Cov roj hmab siv dua tshiab xws li SBR thiab EPDM roj hmab, tsim los ntawm kev tsim tshuaj lom neeg, muaj kev ruaj khov zoo dua, muaj zog tensile siab dua thiab tiv taus kev laus thiab oxidation zoo dua piv rau cov roj hmab siv dua tshiab. Yog li ntawd, lawv tsim nyog rau cov xwm txheej xav tau ntau xws li chaw ua si nawv - qhov twg siv ntev thiab cov xwm txheej ib puag ncig hnyav xav tau kev ua haujlwm zoo ntawm cov khoom siv - thiab cov khoom siv hauv kev lag luam uas xav tau kev tiv thaiv kev xeb tshuaj lom neeg. Cov txheej txheem tsim cov roj hmab siv dua tshiab suav nrog kev sib piv ntawm cov khoom siv thiab kev tswj hwm kub kom nruj kom ntseeg tau tias qhov loj me ntawm cov khoom sib xws thiab kev ua haujlwm ruaj khov ntawm cov khoom kawg. Ob qho tib si cov roj hmab siv dua tshiab thiab cov roj hmab siv dua tshiab raug kuaj xyuas zoo ua ntej tawm hauv Hoobkas, suav nrog cov yam xws li kev faib tawm ntawm cov khoom me me, lub zog tensile, kev tiv taus kev laus thiab cov ntsiab lus ntawm cov khoom volatile kom ntseeg tau tias lawv ua tau raws li cov kev xav tau ntawm daim ntawv thov.