Hydroxypropyl methylcellulose HPMC inonyanya kushandiswa mukuumbwa kwesamende dhaka uye gypsum zvigadzirwa se dispersant, thickener uye binder mukuvaka kurapwa. Inoshandiswa mune simende dhaka kuti iwedzere kubatana kwayo, kuderedza flocculation, kunatsiridza viscosity uye shrinkage, uye ine kuchengetedza kwemvura. Deredza kurasikirwa kwemvura uye kusimba kwekongiri yepamusoro, kudzivirira kuputika uye mamiriro ekunze emunyu anonyungudika nemvura; Hydroxypropyl methylcellulose HPMC ine thixotropy, iyo inogona kushandiswa kugadzira yakaderera fluidity dhaka pendi iyo inogona kuiswa pamadziro akatwasuka mune rimwe bhachi gobvu; HPMC inonatsiridza kunamatira uye kushanda, saka yakakodzera kugadzirira kuyerera kuri nyore kupfapfaidza dhaka kune yakaonda layer pendi.
Huwandu hweHPMC hunoshandiswa muzvivakwa idiki kwazvo, chete 0.1% ~ 1%, asi ine mhedzisiro huru. Inogona kushandiswa seplasticizer, tackifier, mvura inochengetedza mumiriri, air intraining agent uye retarder yepende, plaster, dhaka uye simende zvigadzirwa, kuwedzera kushanda kwayo, kuchengetedza mvura kana kunamatira neiyo base course. Mukuwedzera, maererano nezvinodiwa zvekuchengetedzwa kwezvakatipoteredza, kana yakaoma kusanganisa dhaka, kushanda kusina kugadzikana kunokonzerwa ne-site kusanganiswa, kusvibiswa kunharaunda yakapoteredza, nzvimbo yakashata yekuvaka uye kuderera kwekuyerera kunodziviswa. Iyo inonamira yematairi e ceramic uye yemukati uye yekunze madziro putty yaimbove 107 adhesive. Kubva pakuona kwekuchengetedzwa kwezvakatipoteredza, cellulose ether yakanaka, yakadai seHEC neHPMC.
Simende ine basa rakanaka rekubatanidza, asi kusungirirwa kwesement slurry nesamende dhaka zviri pachena zvakasiyana nekuda kwemusiyano wekuita uye mamiriro pakati peiyo bonding layer uye yakasungirirwa pamusoro panguva yekuvaka. Kana kunyura kwemvura kuita kwechisungo chepamusoro kwakakura, kunokonzera kupera kwemvura kwechisungo chepamusoro, kuderedza zvakanyanya plastiki uye kunamatira kwesamende dhaka, uye kuderedza zvakanyanya simba rekubatanidza. Kare, gypsum kana 107 glue yaiwedzerwa kudhaka resimende, asi kuchine zvimwe zvakakanganisika senge kusayera kuyerwa uye tekinoroji yekuvaka. Viscosity inowedzera mhedzisiro ye cellulose ether mumvura uye isina simba base.
Migumisiro ye cellulose ether kuwedzera inosanganisira:
1. Kuvandudza nguva yekutanga uye yekupedzisira yekuisa simende;
2. Kuvandudza kushushikana kwesamende dhaka;
3. Kuvandudza simba rekuchengetedza mvura sement negypsum;
4. Simba rekumanikidza uye kugera simba resamende kuderera;
5. Kuvandudza kushanda kwekubatana kwedhaka.
Nguva yekutumira: Oct-17-2022