Basa reHPMC muDrymix Mortars

Hydroxypropyl methylcellulose (HPMC) chinhu chinoshandiswa zvakanyanya mudhaka redrymix. Icho chinobva mu cellulose chinonyungudika mumvura uye chinokwanisa kugadzira chinhu chakafanana nejesi kana chawedzerwa kumvura. Ichi chivakwa chinoita kuti HPMC ive yakanakisa kukora uye inosunga mumiriri, ndosaka ichishandiswa mumaindasitiri mazhinji akadai sechikafu, zvekuzora, uye kuvaka.

Mune drymix dhaka, HPMC inoshandiswa se rheology modifier, mvura yekuchengetedza mumiriri, uye mumiriri wekuparadzira. Iyo ine mhedzisiro yakakosha pamhando uye kuita kweiyo drymix mortar. HPMC inowanzowedzerwa muzvikamu zvidiki, kazhinji 0.1% kusvika 0.5% nehuremu hwesimende zvinhu mudhaka re drymix.

Rimwe remabasa ekutanga eHPMC mune drymix dhaka nderekuvandudza kushanda kwedhaka. Inoshanda se rheology modifier nekuwedzera viscosity yemusanganiswa, zvichiita kuti zvive nyore kushanda nayo. Izvi zvinonyanya kukosha kune drymix matope ayo anoshandiswa pakuisa matairi kana pasi, uko kuenderana kwedhaka kwakakosha pakuiswa kwakakodzera.

Rimwe basa rakakosha reHPMC mune drymix dhaka kugona kwayo kuchengetedza mvura. Kana yakasanganiswa nemvura, HPMC inoumba gel-sechinhu chinoteya mamorekuru emvura mukati mechimiro chayo. Ichi chivakwa chinobatsira kuchengetedza iyo drymix dhaka nyoro, izvo zvakakosha pakurapa kwakaringana nekugadzika kwedhaka. Inobatsirawo kuderedza kuderera uye kuputika kwedhaka.

HPMC inoshandawo seanoparadzira mumiriri mune drymix dhaka. Inobatsira kuputsa zvimedu zvezvimedu, zvichiita kuti zvive nyore kwavari kusanganisa zvakaenzana mukati medhaka. Ichi chivakwa chakanyanya kukosha kune drymix matope ane akawanda maficha, sejecha, simende, uye akasiyana ekuwedzera.

Pamusoro peaya ekutanga mabasa, HPMC inogona zvakare kupa mamwe mabhenefiti kune drymix dhaka. Semuenzaniso, inogona kuvandudza kusungirirwa kwedhaka kune substrate, iyo inokosha kune zvikumbiro zvakadai sekuisa tile. Inogonawo kuvandudza kushanduka kwedhaka, zvichiita kuti isanyanya kuputika uye kuputsa pasi pekunetseka.

Pakusarudza HPMC yekushandisa mu drymix mortars, zvinhu zvakati wandei zvinoda kutariswa. Chinonyanya kukosha pane izvi zvinhu ndeye viscosity yeHPMC. Iyo viscosity yeHPMC inosarudza mwero wekukora uye kuchengetwa kwemvura kwainopa kune dhaka. Zvimwe zvinhu zvinoda kutariswa zvinosanganisira pH yeHPMC, dhigirii rayo rekutsiva (DS), uye saizi yayo.

Iyo pH yeHPMC yakakosha nekuti inogona kukanganisa nguva yekumisikidza yedhaka. Kana iyo pH yakanyanyisa kana yakaderera, inogona kukanganisa maitiro emakemikari anoitika panguva yekurapa, zvichitungamira kumatambudziko akadai sekuderedzwa kwesimba kana kuwedzera shrinkage.

Iyo DS yeHPMC chiyero chekuti mangani ehydroxypropyl uye methyl mapoka akasungirirwa kune cellulose musana. Iyo yepamusoro DS inoreva kuti mamwe hydroxypropyl uye methyl mapoka aripo, izvo zvinoita kuti iwedzere kunyungudika nemvura uye viscous HPMC. Iyo yakaderera DS inoreva kuti mashoma hydroxypropyl uye methyl mapoka aripo, izvo zvinoita kuti ive shoma-inonyungudika nemvura uye isina viscous HPMC.

Iyo particle size yeHPMC inogonawo kukanganisa kushanda kwayo mu drymix mortars. Hukuru hudiki hudiki hunogona kukonzera kusaenzana kugovaniswa kweHPMC mukati medhaka, nepo diki diki saizi inogona kukonzera kugwamba uye agglomeration yeHPMC.

Mukupedzisa, HPMC chinhu chakakosha chekuwedzera mune drymix dhaka. Inopa huwandu hwakawanda hwemabhenefiti, kusanganisira kuvandudzwa kwekushanda, kuchengetedza mvura, uye kupararira kwezvikamu.