Mukuvaka zvishongedzo zvekushongedza, putty ndiyo yakakosha zvinhu zvekuyera madziro uye primer, iyo yakanangana nemhando yekuvaka uye yekushongedza mhedzisiro yeanotevera machira, mapikicha uye kumwe kupedzisa. Kuti uvandudze kuita kwekuvaka uye kushandisa kuita kwe putty, chimwe chikamu checellulose etherzvinowedzera zvinowanzowedzerwa kune maitiro ayo. Mumakore achangopfuura, yakagadziridzwa cellulose ether zvishoma nezvishoma yave chinhu chakakosha mukugadzirwa kweputty nekuda kwekuita kwayo kwakanaka.
1. Mhedziso yeakagadziridzwa cellulose ethers
Cellulose ether ikirasi yemvura-inonyungudika kana dispersible polymer komisheni yakagadzirwa ne etherifying uye kugadzirisa chikamu chemapoka ehydroxyl echisikigo cellulose nemakemikari nzira. Common cellulose ethers dzinosanganisira hydroxypropyl methylcellulose (HPMC), methyl cellulose (MC), sodium carboxymethyl cellulose (CMC-Na), etc. Iyo inonzi "modified" cellulose ether inoreva kuiswa kwekushanda kwezvinotsiva kana kudzorwa kwechimiro chayo pahwaro hwekutanga cellulose ether, kuvandudza ayo alkali ether, kuvandudza ayo alkali ether, sosi yemvura, reten reten. kuitira kuti isangane nezvinodiwa zvekushanda kwezvinhu mukuvaka zvikumbiro.
2. Mechanism yechiito chemodified cellulose ether mu putty
Wall putty inowanzo umbwa neinorganic materials yakadai se lime poda, simende, talcum powder, etc. Zvinhu izvi zviri nyore kudonha, delaminate, crack or have poor building performance mushure mekuwedzera mvura nekubvongodza. Mushure mekuwedzera yakagadziridzwa cellulose ether, inonyanya kutamba anotevera mabasa mu putty:
Kuchengetedzwa kwemvura kwakagadziridzwa: Yakagadziridzwa cellulose ether ine kunyura kwemvura kwakasimba uye kuchengetwa kwemvura, iyo inogona kuvhara mvura yakasimba, kudzivirira mvura kuti irege kubuda nekukurumidza kana kubatwa nenheyo yepasi panguva yekuvaka, nekudaro kuve nechokwadi chekuti putty ine yakakwana hydration reaction nguva, kuvandudza kusimba kwekubatanidza uye kuderedza njodzi yekutsemuka.
Kuvandudzwa kwekuita kwekuvaka: Cellulose ether inogona kupa putty yakanakisa kutsvedza uye kukwesha zvivakwa, kuderedza kuramba panguva yekuvaka, uye kuita kuti kuvaka kuve nyore uye kupfava. Panguva imwecheteyo, mhedzisiro yayo yekukora inogona zvakare kugadzirisa fluidity uye kumiswa kwe putty, uye kudzivirira zvinhu kubva pakunyura uye delamination.
Kuvandudzwa kwesimba rekubatanidza: Yakanaka network dhizaini inoumbwa pakati peyakagadziridzwa cellulose ether uye simende hydration chigadzirwa, iyo inobatsira kukwidziridza kubatana kwepakati pakati pe putty uye base layer uye kugadzirisa kunamatira kwese.
Yakanakisa anti-sagging chivakwa: Yakanaka thixotropic zvivakwa zvinoita kuti putty isanyanya kudonha panguva yekuvaka facade, uye inogona kugadzira yakafuratira, yakafanana gobvu coating, kuvandudza kushanda kwekuvaka uye kupera kwechigadzirwa mhedzisiro.
Kuwedzera kugadzikana uye kuchengetedza: Yakagadziridzwa cellulose ether inogona kuvharira stratification, kunaya, uye agglomeration yeputty panguva yekufambisa uye kuchengetedza, uye kunatsiridza kuchengetedza kugadzikana kwechigadzirwa.
3. Maitiro ekugadzirisa uye kugadzirisa kwekuita
Nzira dzakajairwa dzekugadzirisa dzinosanganisira kuunza mapoka ehydrophobic, kushandura dhigirii rekutsiva, uye kudzora kugoverwa kwehuremu. Semuyenzaniso, hydrophobically modified HPMC (senge HPMC-M) inogona kuwedzera kuvandudza kudzivirira kwemvura uye yakakora coating ye putty, uye nekudzora etherification reaction mamiriro, zvigadzirwa zvine chaiyo gel tembiricha uye rheological maitiro anogona kuwanikwa kuzadzisa zvinodiwa zvekuvaka zvemamiriro ekunze akasiyana uye mamiriro epasi.
Kune zvakare yakakosha cellulose ether zvigadzirwa zvakagadziridzwa zvekushandisa zvakasiyana, senge tembiricha yakakwira gel HPMC inokodzera kuvaka tembiricha, yakaderera viscosity uye yakakwira yekuchengeta mvura HPMC, nezvimwe, kusangana nemusika wakasiyana uye maitiro zvinodiwa.
4. Kuchengetedza kwekushandisa
Mukuita kwe putty formula dhizaini nekugadzira, zvinotevera mapoinzi anofanirwa kucherechedzwa kana uchishandisa yakagadziridzwa cellulose ether:
Dzora huwandu hwekuwedzera, kazhinji 0.2% kusvika 0.5% yehuremu hweputty yakaoma poda; yakawandisa inogona kukanganisa nguva yekuomesa uye inozotevera yekubatisa kuita.
Pre-dry mixing inofanira kuva yunifomu uye yobva yabvongodzwa nemvura kuti ive nechokwadi chokuti cellulose ether yakapararira zvakakwana uye isina mapundu.
Sarudza iyo yakakodzera mhando ye cellulose ether zvinoenderana nenzvimbo yekuvaka (senge tembiricha, humidity) uye mhando yeputty (yemukati madziro, ekunze madziro, isina mvura mhando, nezvimwewo).
Sekuwedzera kunoshanda nekuita kwakanakisa,yakagadziridzwa cellulose etherinoita basa risingadzoreki uye rakakosha mukugadzira uye kushandiswa kweputty. Haisi kungovandudza zvakanyanya kuve nyore kwekuvaka uye zvemuviri zvimiro zve putty, asi zvakare inopa yakavimbika uye inoshanda mhinduro yemadziro base kurapwa. Nekuenderera mberi kwekusimudzirwa kwekuvaka kwegirinhi uye yakanaka yekuvaka pfungwa, kudiwa kwepamusoro-kuita putty kuri kukura, uye tarisiro yekushandiswa kweyakagadziridzwa cellulose ether mumunda wezvivakwa zvekuvaka ichave yakakura.
Nguva yekutumira: May-15-2025