HPMC (hydroxypropyl methylcellulose)Musanganiswa wechivako unoshandiswa zvakanyanya uye unoshandiswa zvakanyanya mu gypsum mortar. Mabasa ayo makuru ndeekuvandudza mashandiro ekuvaka kwe dhaka, kuvandudza kuchengetedza mvura, kuwedzera kunamira uye kugadzirisa hunhu hwe rheological hwedhaka. Gypsum mortar chinhu chekuvaka chine gypsum sechinhu chikuru, chinowanzoshandiswa mukuvaka kushongedza madziro nedenga.
1. Mhedzisiro yemuyero weHPMC pakuchengetwa kwemvura mudhaka regypsum
Kuchengetwa kwemvura ndeimwe yehunhu hwakakosha hwe gypsum mortar, iyo ine chekuita zvakananga nekushanda kwekuvaka uye simba rekubatanidza dhaka. HPMC, se polymer ine mamorekuru akawanda, ine kuchengetwa kwakanaka kwemvura. Mamorekuru ayo ane huwandu hwakawanda hwe hydroxyl ne ether groups. Mapoka aya anonyungudutsa mumvura anogona kuumba hydrogen bonds nemamorekuru emvura kuderedza kuputika kwemvura. Nokudaro, kuwedzerwa kwehuwandu hwakakodzera hweHPMC kunogona kuvandudza kuchengetwa kwemvura kwedhaka uye kudzivirira dhaka kuti risaome nekukurumidza uye risatsemuke pamusoro panguva yekuvaka.
Ongororo dzakaratidza kuti nekuwedzera kwemuyero weHPMC, kuchengetedza mvura mumota kunowedzera zvishoma nezvishoma. Zvisinei, kana muyero wacho wakanyanya, rheology yemota inogona kunge yakakura zvakanyanya, zvichikanganisa mashandiro ekuvaka. Saka, muyero wakakodzera weHPMC unofanirwa kugadziriswa zvichienderana nekushandiswa chaiko.
2. Mhedzisiro yemuyero weHPMC pasimba rekubatanidza redhaka regypsum
Simba rekubatanidza ndiro rimwe basa guru re gypsum mortar, iro rinokanganisa zvakananga kubatana pakati pe dhaka nehwaro. HPMC, se polymer ine mamorekuru akawanda, inogona kuvandudza kubatana uye kushanda kwe dhaka. Huwandu hwakakodzera hwe HPMC hunogona kuvandudza kubatana kwedhaka, kuitira kuti rigone kuumba kubatana kwakasimba nemadziro ne substrate panguva yekuvaka.
Zvidzidzo zvekuyedza zvakaratidza kuti chiyero cheHPMC chine simba guru pakusimba kwesimbi yesimbi. Kana chiyero cheHPMC chiri mukati mechikamu chakati (kazhinji 0.2%-0.6%), simba resimbi yesimbi rinoratidza kukwira. Izvi zvinodaro nekuti HPMC inogona kuwedzera kunaka kwesimbi yesimbi, kuitira kuti ikwanise kuenderana nesimbi panguva yekuvaka uye kuderedza kubuda kwesimbi nekutsemuka. Zvisinei, kana chiyero chakanyanya, simbi yesimbi inogona kunge iine kuyerera kwakanyanya, zvichikanganisa kunamatira kwayo kusimbi yesimbi, nokudaro ichideredza simba resimbi yesimbi yesimbi.
3. Mhedzisiro yemuyero weHPMC pakuyerera kwemvura uye mashandiro ekuvaka kwedhaka regypsum
Kuyerera kwemvura chiratidzo chakakosha chekushanda kwesimbi mukuvaka gypsum mortar, kunyanya mukuvaka madziro munzvimbo yakakura. Kuwedzerwa kweHPMC kunogona kuvandudza kuyerera kwesimbi muhari, zvichiita kuti zvive nyore kugadzira nekushandisa. Hunhu hweHPMC molecular structure inoibvumira kuwedzera viscosity yesimbi muhari nekukora, nokudaro ichivandudza kushanda uye mashandiro esimbi muhari.
Kana muyero weHPMC wakaderera, kuyerera kwedhaka kunenge kwakaderera, izvo zvinogona kukonzera matambudziko ekuvaka uye kutotsemuka. Huwandu hwakakodzera hwemuyero weHPMC (kazhinji pakati pe0.2%-0.6%) hunogona kuwedzera kuyerera kwedhaka, kuvandudza mashandiro aro ekufukidza uye kutsvedzerera, uye nokudaro hunowedzera kushanda zvakanaka kwekuvaka. Zvisinei, kana muyero wacho wakanyanya, kuyerera kwedhaka kuchava kwakanyanyisa kusviba, maitiro ekuvaka achave akaoma, uye zvinogona kukonzera marara ezvinhu.
4. Mhedzisiro yemuyero weHPMC pakuomesa shrinkage yedhaka regypsum
Kuomesa simbi ndeimwe nzira inokosha ye gypsum mortar. Kuomesa simbi zvakanyanya kunogona kukonzera kutsemuka pamadziro. Kuwedzera HPMC kunogona kuderedza kuoma kwesimbi. Ongororo iyi yakawana kuti huwandu hwakakodzera hweHPMC hunogona kuderedza kubuda kwemvura nekukurumidza, nokudaro zvichideredza dambudziko rekuoma kwesimbi yegypsum mortar. Pamusoro pezvo, chimiro chemamorekuru cheHPMC chinogona kuumba chimiro chakasimba che network, zvichiwedzera kuvandudza kuramba kwesimbi.
Zvisinei, kana muyero weHPMC wakanyanya kukwira, zvinogona kukonzera kuti dhaka rigare kwenguva yakareba, zvichikanganisa kushanda zvakanaka kwekuvaka. Panguva imwe chete, kusimba kwakanyanya kunogona kukonzera kupararira kwemvura zvisina kuenzana panguva yekuvaka, zvichikanganisa kuvandudzwa kwekuderera kwemvura.
5. Mhedzisiro yemuyero weHPMC pakudzivirira kutsemuka kwedhaka regypsum
Kuramba kutsemuka chiratidzo chakakosha chekuongorora mhando ye gypsum mortar. HPMC inogona kuvandudza kuramba kwayo kutsemuka nekuvandudza simba rekudzvanya, kunamira uye kusimba kwe gypsum mortar. Nekuwedzera huwandu hwakakodzera hwe HPMC, kuramba kutsemuka kwe gypsum mortar kunogona kuvandudzwa zvinobudirira kudzivirira kutsemuka kunokonzerwa nesimba rekunze kana shanduko dzekupisa.
Chiyero chakakodzera cheHPMC chinowanzova pakati pe0.3% ne0.5%, izvo zvinogona kuwedzera kusimba kwechimiro chemota uye kuderedza kutsemuka kunokonzerwa nekusiyana kwetembiricha nekuderera kwayo. Zvisinei, kana chiyero chakanyanya, kusimba kwakanyanya kunogona kukonzera kuti mota ipere zvishoma nezvishoma, zvichikanganisa kuramba kwayo kutsemuka.
6. Kugadzirisa uye kushandisa mushonga weHPMC
Kubva pakuongororwa kwezviratidzo zvekushanda zviri pamusoro apa, chiyero cheHPMCine simba guru pakushanda kwe gypsum mortar. Zvisinei, chiyero chakakodzera chemupimo inzira yekuenzanisa, uye chiyero chinowanzo kurudzirwa kuva 0.2% kusvika 0.6%. Nzvimbo dzakasiyana dzekuvaka uye zvinodiwa zvekushandisa zvinogona kuda kugadziriswa kwemupimo kuti uwane kushanda kwakanakisa. Mukushandiswa kwakakodzera, kuwedzera kune chiyero cheHPMC, zvimwe zvinhu zvinofanirwa kutariswa, zvakaita sehuwandu hwemortar, hunhu hwe substrate, uye mamiriro ekuvaka.
Chiyero cheHPMC chine simba guru pakushanda kwe gypsum mortar. Huwandu hwakakodzera hweHPMC hunogona kuvandudza zvinobudirira hunhu hwakakosha hwe dhaka sekuchengetedza mvura, simba rekubatanidza, kuyerera kwemvura, uye kuramba kutsemuka. Kudzora chiyero kunofanirwa kufunga zvakakwana nezvezvinodiwa pakushanda kwekuvaka uye simba rekupedzisira redhaka. Chiyero cheHPMC chinonzwisisika hachingogone kuvandudza mashandiro ekuvaka kwedhaka chete, asiwo kuvandudza mashandiro enguva refu edhaka. Naizvozvo, mukugadzirwa chaiko nekuvaka, chiyero cheHPMC chinofanira kugadziriswa zvichienderana nezvinodiwa chaizvo kuti chiwane mhedzisiro yakanaka.
Nguva yekutumira: Zvita-16-2024