1. Tsanangudzo yerabha poda yakagadziridzwa bhitumeni
Rubber poda yakagadziridzwa bhitumeni (bhitumeni Rubber, inodaidzwa kuti AR) rudzi rutsva rwemhando yepamusoro inoumbwa zvinhu. Pasi pekuita kwakasanganiswa kwebhitumini inorema, tsvina yerabha poda uye zvakasanganiswa, poda yerabha inotora resin, mahydrocarboni uye mamwe maorganic matter mubhitumini, uye inopinda munhevedzano yekuchinja kwemuviri nemakemikari kunyorovesa uye kuwedzera hupfu hwerabha. Iyo viscosity inowedzera, kupfava kunowedzera, uye viscosity, kusimba, uye elasticity yerabha nebhitumini zvinotariswa, nekudaro zvinovandudza mugwagwa webhitumini rerabha.
"Rubber poda yakagadziridzwa bhitumeni" inoreva hupfu hwerabha hwakagadzirwa kubva mumarara matai, iyo inowedzerwa sechigadziriso kune hwaro bhitumeni. Iyo inogadzirwa kuburikidza neakatevedzana ezviito senge tembiricha yakakwira, additives uye shear kusanganiswa mune yakakosha midziyo. adhesive zvinhu.
Iyo yekugadziridza musimboti werabha poda yakagadziridzwa bhitumini yakagadziridzwa bhitumeni simende zvinhu inoumbwa nekuzara kuzvimba kuita pakati pevhiri rabha poda zvidimbu uye matrix bhitumeni pasi pemamiriro akasanganiswa epamusoro-tembiricha. Rubber poda yakagadziridzwa bhitumeni yakavandudza zvikuru maitirwo ebhitumeni, uye inopfuura bhitumeni yakagadziridzwa yakagadzirwa nemamodhifiri anowanzo shandiswa seSBS, SBR, EVA, nezvimwewo. Nekuona kushanda kwayo kwakanaka uye kubatsira kukuru mukuchengetedzwa kwezvakatipoteredza, dzimwe nyanzvi. kufanotaura kuti rabha poda yakagadziridzwa bhitumeni inotarisirwa kutsiva SBS yakagadziridzwa bhitumini.
2. Hunhu hwerabha poda yakagadziridzwa bhitumeni
Rabha rinoshandiswa kugadzirisa bhitumini i polymer ine elastic yakanyanya. Kuwedzera vulcanized rubber powder kune base bitumen inogona kubudirira kana kutopfuura mhedzisiro yakafanana ne styrene-butadiene-styrene block copolymer modified bitumen. Hunhu hwerabha poda yakagadziridzwa bhitumeni zvinosanganisira:
2.1. Kupinda kunoderera, kunyorova kunowedzera, uye viscosity inowedzera, zvichiratidza kuti kugadzikana kwepamusoro kwebhitumini kunovandudzwa, uye rutting uye kusundira zviitiko zvemugwagwa muzhizha zvinovandudzwa.
2.2. Temperature senitivity inoderedzwa. Kana kutonhora kwakaderera, bhitumini inova brittle, inokonzera kushungurudzika kuputika mumugwagwa; kana tembiricha yakakwira, mugwagwa unova wakapfava uye unokanganisa pasi pesimba remotokari dzinoitakura. Mushure mekushandurwa nehupfu yerabha, kutaridzika kwekushisa kwebhitumini kunovandudzwa uye kuyerera kwayo kunopesana kunovandudzwa. The viscosity coefficient of the rubber powder modified bitumen yakakura kudarika iyo yebhitumeni yepasi, zvichiratidza kuti bhitumini yakagadziridzwa ine yakakwirira kupikisa kuyerera deformation.
2.3. Kuderera kwekushisa kwekushanda kunovandudzwa. Rubber poda inogona kuvandudza yakadzika-tembiricha ductility yebhitumini uye kuwedzera kuchinjika kwebhitumini.
2.4. Enhanced adhesion. Sezvo kukora kwerabha bhitumeni firimu yakanamatira pamusoro pedombo kunowedzera, kuramba kwebhitumu pavement kukuvadzwa kwemvura kunogona kuvandudzwa uye hupenyu hwemugwagwa hunogona kuwedzerwa.
2.5. Deredza kusvibiswa kweruzha.
2.6. Wedzera kubata pakati pematairi emotokari uye mugwagwa wepamusoro uye uvandudze kuchengetedzwa kwekutyaira.