HPMC (Hydroxypropyl Methyl Cellulose) chinhu chinowanzoshandiswa mudhaka resimende.Iyo isiri-ionic cellulose ether inowanikwa nekurapa cellulose nemethyl chloride uye propylene oxide.HPMC inoshandiswa zvakanyanya muindastiri yekuvaka nekuda kweakanakisa ekuchengetedza mvura zvivakwa, semukobvu uye bhainda, uye kuvandudza kushanda nesimba kwesamende dhaka.Muchikamu chino, tichakurukura maitiro ekuita kwe cellulose ethers mune sement mortar.
kuchengetedza mvura
HPMC ine yakanakisa yekuchengetedza mvura zvivakwa uye inogona kuchengetedza mvura yemukati yesamende dhaka panguva yekuseta maitiro.Kuita kwekuchengetedza mvura kweHPMC kunobatsira hydration process ye simenti uye kunonoka kuomeswa, nekudaro kuvandudza kusimba kwesamende dhaka.Inobatsira kuderedza shrinkage, kudzivirira kuputika uye kunatsiridza kubatana.Kana HPMC yawedzerwa kune simende dhaka, inoumba chidziviriro chakatenderedza zvigadzirwa zve hydration, ichidzikisa chiyero chekubuda kwemvura mudhaka.
Vandudza kushanda
HPMC inovandudza kushanda kwemasimende nekuita semukobvu uye bhainda.Kana yakasanganiswa nemvura, HPMC inoumba gel-sechinhu chinowedzera viscosity yemusanganiswa.Iyi gel-yakaita senge chinhu chinobatsira kuchengetedza dhaka resimende panzvimbo uye haripere majoini nemakorokoza.Iyo yakagadziridzwa kushanda kwesamende dhaka inobatsirawo kuderedza mutengo wakazara wepurojekiti sezvo ichibvisa kudiwa kwekugadziriswa nguva nenguva.Uyezve, inogona kuiswa nekukurumidza uye nyore, ichiwedzera kumhanya kwekuvaka.
kuwedzera simba
Imwe bhenefiti yakakosha yekushandisa HPMC mudhaka simende ndeyekuti inowedzera simba redhaka.HPMC inobatsira kuparadzira simende zvakaenzana, zvichiita kuti pave nechisungo chakasimba, chakavimbika kune substrate.Iyo yakagadziridzwa yekuchengetedza mvura zvivakwa zveHPMC inobatsira mukuporeswa kwesamende dhaka, nekudaro ichiwedzera simba rayo.Mvura iri mudhaka inopa hydration kune simenti uye kuvapo kweHPMC kunobatsira kuchengetedza mvura, nokudaro kuvandudza nzira yekurapa.
kuderedza shrinkage
Shrinkage idambudziko rinowanzoitika mudhaka resimende nekuda kwekubuda kwemvura.Shrinkage inogona kukonzera kuputika, izvo zvinogona kukanganisa zvakanyanya simba uye kusimba kwechimiro.Nekudaro, HPMC inobatsira kuderedza simende dhaka shrinkage nekuchengetedza hunyoro uye kunonoka kubuda.Izvi zvinoderedza njodzi yekutsemuka, zvichikonzera chimiro chakasimba, chakasimba.
kunatsiridza kunamatira
Chekupedzisira, HPMC inobatsira kuvandudza kusimba kwechisungo chesimende dhaka.HPMC inoita sebhainda rinobatsira kubata dhaka pamwechete.Inobatsirawo kuumba chisungo chakasimba pakati pedhaka uye substrate.Iko kugona kwekubatanidza kwesamende dhaka kunovandudzwa, uye chimiro chakasimba uye chakasimba, chinogona kumira kunze kwemasimba.
mukupedzisa
Mukupedzisa, HPMC ndeyekuwedzera kwakakosha mune simende dhaka nekuda kwekuchengetwa kwayo kwemvura, kushanda kwayo, simba, kuderera kuderera uye kuvandudza kubatana.Iyo nzira yekuita kwe cellulose ethers mu samende dhaka inobva pakuvandudzwa kwekuchengetedza mvura, rubatsiro mukugadzirisa kuporesa, inopa yunifomu kupararira kwesamende, inovandudza kushanda, inoderedza shrinkage uye inovandudza kubatana.Kunyatsoshandisa HPMC mumatope esimende kunogona kukonzera yakasimba, yakasimba uye yakavimbika zvivakwa, izvo zvakakosha kune chero chirongwa chekuvaka.Nekushandiswa kwakakodzera kweHPMC, mapurojekiti ekuvaka anogona kupedzwa nekukurumidza, zvakanyanya uye nemhando yepamusoro.
Nguva yekutumira: Jul-27-2023