HPMC (Hydroxypropyl Methylcellulose) inoshandiswa mune yakaoma-musanganiswa dhaka chinhu chakakosha chemakemikari chinowedzera, chinonyanya kushandiswa sechinhu chakakora, chinochengetedza mvura uye firimu-forming agent. HPMC isiri-ionic cellulose ether yakagadzirwa kubva kune yakasikwa cellulose nekugadziriswa kwemakemikari. Inoshandiswa zvakanyanya mukuvaka zvinhu, kunyanya mune yakaoma-musanganiswa dhaka.
1. Zvinhu zvakakosha zveHPMC
HPMC imhando yepolymer muchimiro cheupfu chena kana kuti-chena, ine maitiro ekusava nehuturu, kunhuwa uye kunyungudika kwakanaka. Inogona kunyungudutswa mumvura inotonhora kuti iite yakajeka kana zvishoma milky viscous mhinduro, uye ine kugadzikana kwakanaka uye kunamatira. HPMC ine zvisiri-ionic zvimiro, saka inogona kuchinjika kune akasiyana midhiya, kunyanya mune alkaline nharaunda. Inogona kuramba ichichengetedza basa rayo uye haisati yatarisana nemakemikari.
Iwo makuru maitiro eHPMC anosanganisira:
Kuchengetedzwa kwemvura: Inogona kuchengetedza hunyoro mune izvo zvinhu, kurebesa nguva yekuomesa, uye kugadzirisa kuve nyore kwekuvaka.
Kukora mhedzisiro: Nekuwedzera viscosity yedhaka, kuita kwayo kwekuvaka kunowedzerwa kudzivirira kudonha uye kuyerera.
Lubricating effect: Kuvandudza kushanda kwechinhu uye ita kuti dhaka rive rakatsetseka panguva yekuvaka.
Firimu-kugadzira pfuma: Panguva yekuomeswa kwedhaka, firimu yunifomu inogona kuumbwa, iyo inobatsira kuvandudza simba rezvinhu.
2. Basa reHPMC mumatope akaoma-akasanganiswa
Muzvirongwa zvekuvaka, dry-mixed mortar (inozivikanwawo se premixed mortar) ivhu rakaoma rehupfu rakagadzirwa nemazvo mufekitori. Panguva yekuvaka, inongoda kusanganiswa nemvura panzvimbo. HPMC inowanzowedzerwa kuvandudza kushanda kwayo kwekuvaka, kuwedzera nguva yekushanda uye kugadzirisa kunaka kwechigadzirwa chekupedzisira. Kunyanya, basa reHPMC mudhaka rakaoma-musanganiswa rinosanganisira zvinotevera mapoinzi:
Kuvandudza kuchengetedza kwemvura
Mudhaka, kugovera yunifomu uye kuchengetwa kwemvura ndiyo kiyi yekusimbisa simba rayo, kubatanidza kuita uye kushanda. Semumiriri wekuchengetedza mvura, HPMC inogona kunyatsokiya mvura mudhaka uye kuderedza mwero wekurasikirwa nemvura. Izvi zvinonyanya kukosha kune zvinhu zvakaita semendi uye gypsum zvinoda hydration reactions. Kana mvura ikarasika nekukurumidza, zvinhu zvacho zvingasakwanisa kupedzisa hydration reaction, zvichikonzera kuderera kwesimba kana kuputika. Kunyanya pasi pekushisa kwepamusoro, yakaoma kana yakanyanya kunyura base mamiriro, iyo yekuchengeta mvura mhedzisiro yeHPMC inogona kuvandudza zvakanyanya mashandiro ekuvaka uye kupera kwechigadzirwa mhando yedhaka.
Kuvandudza kushanda kwekuvaka
Iko kushanda kwevhu kunobata zvakananga kusununguka kwekushanda panguva yekuvaka. HPMC inovandudza viscosity uye lubricity yedhaka, zvichiita kuti zvive nyore kushanda panguva yekuvaka. Ingave yakakweshwa, kuparadzirwa kana kupfapfaidzwa, dhaka rine HPMC rinogona kuve rakatsetseka uye rakaenzana rakanamirwa panzvimbo yekuvaka, nekudaro kuvandudza kushanda kwekuvaka uye kuderedza marara.
Wedzera adhesion uye anti-sagging zvivakwa
Iko kukora mhedzisiro yeHPMC inobvumira dhaka kuti rinamate zvakasimba panguva yekuvaka facade uye haiite kudonha kana kutsvedza. Izvi zvinonyanya kukosha kune zviitiko zvekushandisa senge tile bonding mortar, yemukati uye yekunze madziro plastering dhaka. Kunyanya kana uchigadzira dhaka rakakora, kuita kwekunamatira kweHPMC kunogona kuve nechokwadi kugadzikana kwedhaka uye kudzivirira dambudziko rekudururwa kwedhaka nekuda kwehuremu hwakafa.
Wedzera nguva yakazaruka
Mukuvaka chaiko, nguva yakavhurika (kureva, nguva yekushanda) yedhaka yakakosha kuve nechokwadi chemhando yekuvaka. Kunyanya muzviitiko zvekuvaka zvakakura, kana dhaka rikaoma nekukasira, zvingaomera vashandi vekuvaka kuti vapedze mabasa ese, zvichikonzera kusaenzana kwepamusoro. HPMC inogona kuwedzera nguva yakavhurika yedhaka, ichiona kuti vashandi vekuvaka vane nguva yakakwana yekugadzirisa nekushanda.
3. Zvakanakira kushandisa HPMC
Wide adaptability
HPMC inogona kushandiswa zvakanyanya mumhando dzakasiyana-siyana dzakaoma-musanganiswa dhaka, senge masonry dhaka, plastering dhaka, mataira adhesive, self-leveling dhaka, etc. Kunyangwe ichishandiswa sement-based kana gypsum-based materials, inogona kutamba kudzikamisa basa.
Kuwedzera kwakaderera, kushanda kwepamusoro
Kuwanda kweHPMC kunowanzova kuduku (inenge 0.1% -0.5% yehupfu hwakaoma hwakaoma), asi maitiro ayo ekugadzirisa maitiro anokosha zvikuru. Izvi zvinoreva kuti kuita kwekuvaka uye kunaka kwedhaka kunogona kuvandudzwa zvakanyanya pasina kuwedzera zvakanyanya mari.
Zvakatipoteredza ushamwari uye kwete chepfu
HPMC pachayo haina chepfu, haina kunhuwa, uye haisvibise nharaunda. Nekuvandudzwa kwekuziva kwezvakatipoteredza, kudiwa kwezvinhu zvekuvaka zvakasvibirira kuri kuramba kuchiwedzera. HPMC, seyakachengetedzeka uye ine hushamwari makemikari ekuwedzera, inosangana nemamiriro ezvakatipoteredza ezvemazuva ano zvekuvaka.
4. Kuchengetedza kwekushandisa
Kunyangwe HPMC ichiita basa rakakosha mudhaka rakaoma-musanganiswa, zvinotevera pfungwa dzinofanirwa kucherechedzwa panguva yekushandiswa:
Solubility control: HPMC inoda kuwedzerwa zvishoma nezvishoma kumvura panguva yekusimudzira kudzivirira kusangana nekuda kwekuparara kusina kuenzana, kunokanganisa mhedzisiro yedhaka.
Kufurira tembiricha: Kunyungudika kweHPMC kunogona kukanganiswa nekupisa. Kunyanya kupisa kana kuderera kwemvura tembiricha kunogona kukonzera shanduko muyero yekunyungudika, zvichikanganisa nguva yekuvaka uye mhedzisiro yedhaka.
Kusanganiswa nezvimwe zvinowedzera: HPMC inowanzo shandiswa nemamwe makemikari anowedzera, akadai semvura inoderedza, air etraining agents, etc. Paunenge uchigadzira fomu, kutarisa kunofanira kubhadharwa kune kuwirirana pakati pezvikamu kuti udzivise maitiro asina kunaka.
Kushandiswa kweHPMC mudhaka yakaoma-yakasanganiswa kune zvakakosha. Inogona kuvandudza kushanda kwakazara kwedhaka nekuvandudza kuchengetwa kwemvura, kuwedzera kushanda kwekuvaka, uye kuwedzera kunamatira. Nekuvandudzwa kwehunyanzvi hwekuvaka uye zvinodiwa zvemhando muindasitiri yekuvaka, HPMC, sechinhu chakakosha chemakemikari inowedzera, ichaita basa rinowedzera kukosha mudhaka rakaoma-musanganiswa.
Nguva yekutumira: Oct-09-2024