Hydroxypropyl Methylcellulose (HPMC) inokosha cellulose ether inoshandiswa zvakanyanya mudhaka yakaoma-yakasanganiswa kuti ivandudze kushanda kwayo kwekuvaka. Iyo mashandiro ekuita kweHPMC mune yakaoma-yakavhenganiswa dhaka inonyanya kuratidzwa mukuchengetedza unyoro, kuenderana kugadzirisa, sag kuramba uye kuputika kuramba.
1. Kuchengeta unyoro
Basa rakakosha reHPMC nderekuvandudza kuchengetedza kwemvura kweiyo yakaoma musanganiswa dhaka. Panguva yekuvaka, kukurumidza kubuda kwemvura mumatope kuchaita kuti iome nokukurumidza, zvichiita kuti kusakwana kwe hydration ye simenti uye kukanganisa simba rekupedzisira. Iyo molecular structure yeHPMC ine nhamba huru ye hydrophilic mapoka (akadai se hydroxyl uye methoxy mapoka), ayo anogona kuumba hydrogen zvisungo uye zvakanyanya kunatsiridza kuchengetedza kwemvura. Iyo network magadzirirwo ainoumba mudhaka inobatsira kukiya mukunyorova, nekudaro ichidzikamisa mwero wekubuda kwemvura.
Kuchengetwa kwemvura hakungobatsiri chete kuwedzera nguva yekushanda kwedhaka, asiwo zvakanyanya kunatsiridza kutsetseka kwekuvaka munzvimbo yakaderera tembiricha kana yakaoma nharaunda. Nekuchengetedza hunyoro hwakakwana, HPMC inogonesa dhaka kuchengetedza kushanda kwakanaka kwenguva yakareba, kudzivirira kutsemuka uye matambudziko ekuvaka anokonzerwa nekurasikirwa kwemwando.
2. Kugadzirisa kugadzikana
HPMC zvakare ine basa rekugadzirisa kuenderana kwevhu rakaoma rakasanganiswa dhaka, iro rakakosha kune fluidity uye kupararira kwekuvaka. HPMC inoumba colloidal mhinduro kana yakanyungudutswa mumvura, uye viscosity yayo inowedzera nekuwedzera molecular uremu. Munguva yekuvaka, iyo colloidal zvivakwa zveHPMC inochengeta dhaka pane imwe kuenderana uye kudzivirira kudzikira kwemvura yedhaka nekuda kwekuparadzaniswa kwehunyoro.
Kuenderana kwakakodzera kunovimbisa kuti dhaka rakaputirwa zvakaenzana pane substrate uye rinogona kuzadza pores uye nzvimbo dzisina kurongeka pamusoro peiyo substrate. Uhu hunhu hwakakosha kwazvo kuve nechokwadi chekunamatira uye kuvaka kwemhando yedhaka. HPMC inogona zvakare kuchinjika kune zvakasiyana zvinodiwa zvekuvaka nekugadzirisa zvikamu zvakasiyana uye nekupa inodzoreka kushanda.
3. Anti-sag pfuma
Panzvimbo dzakasimukira kana dzakarerekera pakuvaka (sekupurasita madziro kana kubatanidza masonry), dhaka rinowanzodonha kana kutsvedza nekuda kwehuremu hwayo. HPMC inosimudzira sag kuramba kwedhaka nekuwedzera thixotropy yayo. Thixotropy inoreva kukwanisa kwedhaka kuderedza viscosity yayo kana ichiiswa pasi pesimba rekugera uye kudzorera viscosity yayo mushure mokunge simba rekuveura ranyangarika. HPMC inogona kugadzira slurry ine yakanaka thixotropy, ichiita kuti dhaka rive nyore kushandisa panguva yekuvaka, asi inogona kukurumidza kudzoreredza viscosity yayo uye inogadziriswa pamusoro pekuvaka mushure mekumisa basa.
Ichi chimiro chinoderedza zvakanyanya marara ematope uye inovandudza kushanda kwekuvaka uye kunaka. Mumashandisirwo akadai senge tile bonding, HPMC's sag kuramba inogona kuve nechokwadi chekuti mataira haafambe mushure mekuiswa, nekudaro achivandudza chokwadi chekuvaka.
4. Kutsemuka kuramba
Iyo yakaoma-yakavhenganiswa dhaka mushure mekuvaka inowanzoputika panguva yekuoma, iyo inonyanya kukonzerwa nekuderera kunokonzerwa nekusaenzana kugoverwa kwehunyoro hwemukati. Nekuvandudza kuchengetwa kwemvura uye kuenderana kwedhaka, HPMC inokwanisa kuderedza mukati mehunyoro magradients, nekudaro ichidzikisa shrinkage kusagadzikana. Panguva imwecheteyo, HPMC inogona kuparadzira uye kutora shrinkage kusagadzikana uye kuderedza kuitika kwekupwanya nekugadzira inoshanduka network chimiro mudhaka.
Kupokana nekutsemuka kwakakosha pakuwedzera kusimba uye hupenyu hwebasa rematope. Iri basa reHPMC rinogonesa dhaka kuchengetedza zvakanaka zvemuviri zvimiro panguva yekushandiswa kwenguva refu uye isinganyanyi kutsemuka nekutsemuka.
5. Mamiriro ekuvaka uye kushandiswa
Mukuvaka chaiko, HPMC inowanzo wedzerwa kumhando dzakasiyana-siyana dzakaoma-musanganiswa dhaka zvinoenderana nezvinodiwa chaizvo, senge madhiri ekupurasita, mataira ekubatanidza madhaka uye ega-leveling madhaka. Iyo chaiyo yekuwedzera huwandu uye chikamu chinoda kuvandudzwa zvinoenderana nerudzi rwedhaka, chimiro chehwaro zvinhu uye nharaunda yekuvaka. Semuenzaniso, kana uchivaka munzvimbo yepamusoro-yekushisa, kuwedzera zvakakodzera huwandu hweHPMC kunogona kuvandudza kuchengetwa kwemvura kwedhaka uye kudzivirira matambudziko ekuvaka uye matambudziko emhando anokonzerwa nekuoma nekukurumidza.
Mukushandiswa kwematairi eceramic adhesives, HPMC inogona kupa yakanakisa kunamatira uye sag kuramba kuti ive nechokwadi chekunamatira kwakasimba kwematairi e ceramic kumadziro. Panguva imwecheteyo, nekugadzirisa huwandu hweHPMC hwakawedzerwa, nguva yekuvhura dhaka inogonawo kudzorwa kuti ifambise kushanda kwevashandi vekuvaka.
Hydroxypropyl methylcellulose (HPMC), sechinhu chinowedzera chinowedzera, chinonyanya kunatsiridza kuvakwa kwedhaka yakaoma-yakasanganiswa kuburikidza nekuchengetedza kwayo mvura, kugadzikana kwekugadzirisa, anti-sag uye anti-cracking properties. Aya maitiro haangonatsiridza mabatiro ezvivakwa zvedhaka, asi zvakare anowedzera kunaka kwekuvaka uye kusimba. Iko kushandisa zvine musoro kweHPMC kunogona kunyatso kutarisana nematambudziko enzvimbo dzakasiyana dzekuvaka uye nekupa zvirinani zvigadziriso zvezvirongwa zvekuvaka. Mune ramangwana, nekuenderera mberi kwekusimudzira kwesainzi uye tekinoroji yekuvaka, tarisiro yekushandiswa kweHPMC mudhaka yakaoma-yakasanganiswa ichave yakakura.
Nguva yekutumira: Jul-10-2024