HPMC pamusoro pekusimba kwemota yesimende

Hydroxypropyl Methylcellulose (HPMC)imhando ye non-ionic cellulose ether inoshandiswa zvakanyanya mukuvaka, kunyanya mu cement mortar. Inoita basa rakakosha mukudzora mashandiro e mortar nekuda kwekuchengetedza kwayo mvura, kukora kwayo, kunyorova kwayo uye hunhu hwayo hwekugadzira firimu. Zvisinei, kunyangwe kuwedzerwa kweHPMC kuchigona kuvandudza mashandiro e mortar, kuchaitawo kuti mortar isimbe.

1. Hunhu hwepakutanga uye mashandiro ekushanda kweHPMC

HPMC ipolymer inonyungudika mumvura yakagadzirwa nemakemikari inoisa mapoka emethyl nehydroxypropyl mu cellulose yechisikigo. Maumbirwo ayo emamorekuru ane huwandu hwakawanda hwemapoka ehydrophilic, izvo zvinoita kuti igadzire colloidal solution mumvura uye ine simba rakasimba rekuchengetedza mvura.

Mukugadzira simende, HPMC inonyanya kuita mabasa anotevera:

Kuchengetwa kwemvura: HPMC inogona kuderedza zvakanyanya kurasikirwa kwemvura mudhaka, kunonotsa kunyoroveswa kwesimende, uye kupa nguva yakakwana yekunyoroveswa kwesimende.

Kuvandudza mashandiro: Kuvandudza mashandiro ekuvaka nekuvandudza kunamira uye kuyerera kwedhaka.

Kunonoka: HPMC ine mhedzisiro yekunonoka pakunyoroveswa kwemvura nesimende nekuti inodzivirira kupararira kwemvura nekukurumidza.

Kugadzira firimu: Firimu rakatetepa rinoumbwa panguva yekuomesa kuti dhaka rirambe richikwanisa kupwanyika uye kuchinjika.

2. Mhedzisiro yeHPMC pakusimba kwedhaka

Kunyangwe kuiswa kweHPMC kuchivandudza mashandiro ekuvaka kwemota, kune mhedzisiro yakaipa pasimba remuchina wemota (kunyanya simba rekudzvanya uye simba rekutenderera). Inonyanya kuratidzwa muzvinhu zvinotevera:

Kunonoka kwemvura: Kunyangwe HPMC ichichengetedza mvura zvichiita kuti simende iwane mvura yakakwana pakutanga, kuputira kwayo pamusoro pezvidimbu zvesimende kunokanganisa kupinda kwemvura, nokudaro zvichinonotsa mwero wemvura inoyerera uye zvichikonzera kukura kwesimba zvishoma nezvishoma.

Kugadzirwa kwemabhuru: HPMC iri nyore kupinza mhepo panguva yekusanganisa, zvichikonzera huwandu hwakawanda hwemabhurubhuru anoumbwa mukati mebhuruvhu. Maburi aya anova maburi madiki mushure mekuoma, zvichideredza huwandu uye simba rebhuruvhu.

Kukanganiswa kwehuwandu hwemvura nebhandi: HPMC inokanganisa kuyerera kwesimbi yesimende painotora mvura. Kuti mvura isvike pakuyerera kwakakodzera panguva yekuvaka, mvura yakawanda ingangoda kuwedzerwa, nokudaro zvichiwedzera huwandu hwemvura nebhandi uye zvichideredza simba rekupedzisira.

Kukanganiswa kwechimiro chezvigadzirwa zve hydration yesimende: HPMC inogona kusangana nezvimwe zvigadzirwa zve hydration panguva ye hydration, zvichichinja chimiro chazvo chekristaro uye kugoverwa kwenzvimbo, nokudaro zvichikanganisa hunhu hwemakanika.

3. Simba remushonga weHPMC pasimba remuviri

Simba reHPMC pakusimba kwesimbi yesimbi yesimbi rinoratidza kuti pane imwe nguva:

Chipimo chidiki (<0.1%): hachina simba guru, chinonyanya kuvandudza kuchengetedza mvura uye kushanda kwayo;

Chiyero chepakati (0.1%~0.3%): mashandiro ekuvaka anovandudzika zvakanyanya, asi simba rinotanga kudzikira;

Chipimo chakakwira (>0.3%): simba rinodzikira zvakanyanya, kunyanya simba rekutanga rinodzikira zvakanyanya, izvo zvinogona kukanganisa kufambira mberi kwekuvaka kwekutanga.

Kudzora zvine mwero huwandu hweHPMC inowedzerwa ndiyo kiyi yekuchengetedza simba redhaka ukuwo uchiita kuti kuvaka kushande zvakanaka.

4. Mazano ekugadzirisa

Kuti pave nekuenzanisa hukama huripo pakati pekushanda kwekuvaka uye hunhu hwemakanika, kugadzirisa kunogona kuitwa kubva pazvinhu zvinotevera:

Gadzirisa chipimo chemushonga: Sarudza chipimo chemushonga chakakodzera cheHPMC kuburikidza nekuyedza kuti uve nechokwadi chekuti kuvaka kwacho kunoshanda zvakanaka uye kuderedza migumisiro yakaipa pasimba remushonga.

Zvinosanganiswa nemakemikari: Shandisa zvinosanganiswa zvinogona kuwedzera simba, zvakaita se silica fume, fly ash nezvimwe zvinosanganiswa nemineral, kuti uwedzere kuwanda kwemortar.

Sarudza zvigadzirwa zveHPMC zvine viscosity yakakodzera: HPMC yemhando dzakasiyana dzeviscosity ine mhedzisiro yakasiyana pakushanda kwemortar. Viscosity yakanyanya inogona kuwedzera kuumbwa kwemabubbles, uye viscosity iri pakati nepakati inobatsira zvikuru pakushanda kwese.

Dzora chiyero chemvura nesimende panguva yekuvaka: Edza kuderedza mvura inoshandiswa nekuda kwezvinodiwa pakuyerera kwemvura kuti usanyanya kukanganisa simba remvura nesimende.

HPMCine zvakanakira zvikuru mukuvandudza mashandiro ekuvaka kwesimbi yesimbi, asi kukanganisa kwayo simba resimbi, kunyanya simba rekutanga, hakugoni kufuratirwa. Kushandisa HPMC zvine musoro, kudzora mwero wayo, uye kusanganiswa nedzimwe nzira dzekugadzirisa zvinogona kuona kuti simba resimbi rinozadzisa zvinodiwa zveinjiniya ukuwo zvichivandudza kushanda zvakanaka kwesimbi. Tsvagiridzo yeramangwana inogona kuongorora mashandiro eHPMC nezvimwe zvinhu zvakasanganiswa kuti ipe nhungamiro yesainzi yekushandiswa kwayo muzvinhu zvekuvaka.