HPMC (hydroxypropyl methylcellulose)chivakwa chinowanzo shandiswa musanganiswa uye chinoshandiswa zvakanyanya mu gypsum mortar. Basa rayo guru nderekuvandudza mashandiro ekuvaka kwedhaka, kuvandudza kuchengetwa kwemvura, kuwedzera kunamatira uye kugadzirisa rheological zvimiro zvedhaka. Gypsum dhaka chinhu chekuvaka chine gypsum sechinhu chikuru, icho chinowanzoshandiswa mumadziro uye sirin'i yekushongedza kuvaka.
1. Mhedzisiro yeHPMC dosage pakuchengetedza mvura yegypsum mortar
Kuchengetwa kwemvura ndechimwe chezvinhu zvakakosha zvegypsum mortar, iyo yakanangana nekuita kwekuvaka uye kusimba kwekubatanidza kwedhaka. HPMC, seyepamusoro molecular polymer, ine mvura yakanaka yekuchengetedza. Mamorekuru ayo ane nhamba huru yehydroxyl nemapoka ether. Aya mapoka e hydrophilic anogona kuumba hydrogen zvisungo nemamorekuru emvura kuderedza kuvhuvhuta kwemvura. Nokudaro, kuwedzerwa kwehuwandu hwakakodzera hweHPMC kunogona kuvandudza kuchengetwa kwemvura kwedhaka uye kudzivirira dhaka kubva pakuoma nekukurumidza uye kuputika pamusoro pepamusoro panguva yekuvaka.
Zvidzidzo zvakaratidza kuti nekuwedzera kweHPMC dosage, kuchengetwa kwemvura kwedhaka kunowedzera zvishoma nezvishoma. Nekudaro, kana iyo dosi yakawandisa, iyo rheology yedhaka inogona kunge yakakura kwazvo, ichikanganisa kuita kwekuvaka. Naizvozvo, iyo yakakwana dosage yeHPMC inoda kugadziridzwa zvinoenderana nekushandiswa chaiko.
2. Mhedzisiro yeHPMC dosage pakusimba kwekubatanidza yegypsum mortar
Simba rekubatanidza nderimwe basa rinokosha regypsum mortar, iro rinokanganisa zvakananga kunamatira pakati pevhu uye chigadziko. HPMC, seyakakwira molecular polymer, inogona kuvandudza kubatana uye kubatana kwekuita kwedhaka. Huwandu hwakakodzera hweHPMC hunogona kuvandudza kusungirirwa kwedhaka, kuitira kuti igadzire kunamatira kwakasimba nemadziro uye substrate panguva yekuvaka.
Zvidzidzo zvekuyedza zvakaratidza kuti dosi yeHPMC ine mhedzisiro yakakosha pakusimba kwechisungo chedhaka. Kana iyo HPMC dosage iri mukati meimwe siyana (kazhinji 0.2% -0.6%), iyo yekubatanidza simba inoratidza kukwira kumusoro. Izvi zvinodaro nekuti HPMC inogona kukwidziridza purasitiki yedhaka, kuitira kuti igone kukwana zvirinani iyo substrate panguva yekuvaka uye kuderedza kudurura uye kuputika. Nekudaro, kana iyo dosi yakakwira zvakanyanya, dhaka rinogona kunge riine mvura yakawandisa, inokanganisa kunamatira kwayo kune substrate, nekudaro ichidzikisa simba rekubatanidza.
3. Mhedzisiro yeHPMC dosage pane fluidity uye kuvaka kuita kwegypsum mortar
Fluidity chiratidzo chakakosha chekuita mukuita kwekuvaka kwegypsum mortar, kunyanya munzvimbo yakakura yekuvaka madziro. Kuwedzerwa kweHPMC kunogona kuvandudza zvakanyanya kuyerera kwedhaka, zvichiita kuti zvive nyore kuvaka nekushanda. Hunhu hweHPMC molecular chimiro inoita kuti iwedzere viscosity yedhaka nekukora, nekudaro ichivandudza kushanda uye kuita kwekuvaka kwedhaka.
Kana iyo HPMC dosage yakadzikira, kuyerera kwedhaka kwakashata, izvo zvinogona kutungamirira kumatambudziko ekuvaka uye kunyange kuputika. Huwandu hwakakodzera hweHPMC dosage (kazhinji pakati pe0.2% -0.6%) inogona kuvandudza kuyerera kwedhaka, kuvandudza mashandiro ayo ekuputira uye kutsvedzerera maitiro, uye nekudaro kunatsiridza kugona kwekuvaka. Nekudaro, kana iyo dosi yakakwira zvakanyanya, iyo fluidity yedhaka inozonyanya kuona, maitiro ekuvaka anozonetsa, uye anogona kutungamirira kumarara.
4. Mhedzisiro yeHPMC dosage pakuomesa shrinkage yegypsum mortar
Kuomesa shrinkage chimwe chinhu chakakosha chegypsum mortar. Kuwedzera kuderera kunogona kukonzera kutsemuka pamadziro. Kuwedzerwa kweHPMC kunogona kunyatso kudzikisa kuomesa shrinkage yedhaka. Chidzidzo chacho chakawana kuti huwandu hwakakodzera hweHPMC hunogona kuderedza kukurumidza kubuda kwemvura, nekudaro kuderedza dambudziko rekuoma kwe gypsum mortar. Uye zvakare, iyo molecular chimiro cheHPMC inogona kuumba yakagadzikana network chimiro, ichiwedzera kuvandudza kutsemuka kuramba kwedhaka.
Nekudaro, kana iyo dosage yeHPMC yakanyanya kukwira, inogona kuita kuti dhaka rigare kwenguva yakareba, zvichikanganisa kushanda kwekuvaka. Panguva imwecheteyo, iyo yakakwira viscosity inogona kukonzera kusaenzana kugovera kwemvura panguva yekuvaka, inokanganisa kuvandudzwa kwe shrinkage.
5. Mhedzisiro yeHPMC dosage pane crack resistance yegypsum mortar
Crack resistance chiratidzo chakakosha chekuongorora kunaka kwegypsum mortar. HPMC inogona kuvandudza kutsemuka kwayo nekuvandudza simba rekumanikidza, kunamatira uye kuoma kwedhaka. Nekuwedzera huwandu hwakakodzera hweHPMC, kuputika kweiyo gypsum motar kunogona kuvandudzwa zvinobudirira kudzivirira kutsemuka kunokonzerwa nekunze kwesimba kana tembiricha shanduko.
Iyo yakakwana dosage yeHPMC kazhinji iri pakati pe0.3% ne0.5%, iyo inogona kuwedzera kuoma kwechimiro chedhaka uye kuderedza kutsemuka kunokonzerwa nekusiyana kwekushisa uye kupera. Nekudaro, kana iyo dosi yakakwira zvakanyanya, iyo yakawandisa viscosity inogona kukonzera dhaka kuti irape zvishoma nezvishoma, zvichikanganisa kuramba kwayo kwese kutsemuka.
6. Kugadziridza uye kushandiswa kunoshanda kweHPMC dosage
Kubva pakuongororwa kwezviratidzo zvekushanda zviri pamusoro, chiyero cheHPMCine zvakakosha pakuita kwegypsum mortar. Nekudaro, iyo yakakwana dosage renji idanho rekuenzanisa, uye dosi inowanzokurudzirwa kuve 0.2% kusvika 0.6%. Nzvimbo dzakasiyana dzekuvaka uye zvinodiwa zvekushandisa zvingada kugadziridzwa kune dosage kuti uwane kuita kwakanyanya. Mumashandisirwo anoshanda, mukuwedzera kune dosi yeHPMC, zvimwe zvinhu zvinoda kutariswa, senge chikamu chedhaka, zvivakwa zve substrate, uye mamiriro ekuvaka.
Iyo dosage yeHPMC ine simba rakakura pakuita kwegypsum mortar. Huwandu hwakakodzera hweHPMC hunogona kunyatso kuvandudza zvinhu zvakakosha zvedhaka sekuchengetedza mvura, simba rekubatanidza, fluidity, uye kuputika kuramba. Kudzora kweiyo dosage kunofanirwa kunyatso funga zvinodikanwa zvekuita kwekuvaka uye simba rekupedzisira redhaka. Inonzwisisika HPMC dosage haingogone kuvandudza mashandiro ekuvaka kwedhaka, asi zvakare kuvandudza kushanda kwenguva refu kwedhaka. Naizvozvo, mukugadzira uye kuvaka chaiko, iyo dosage yeHPMC inofanirwa kuvandudzwa zvinoenderana nezvinodiwa chaizvo kuti uwane yakanakisa mhedzisiro.
Nguva yekutumira: Zvita-16-2024