1. Nhanganyaya
Cement-based tile adhesive parizvino ndiyo yakakura kushandiswa kwedhaka yakaoma-yakasanganiswa, iyo inoumbwa nesamende sechinhu chikuru chesimende uye inowedzerwa nemagiredhi aggregates, anochengetedza mvura, maajenti ekutanga simba, latex poda uye zvimwe organic kana inorganic additives. musanganiswa.Kazhinji, inongoda kusanganiswa nemvura kana ichishandiswa.Kana ichienzaniswa neyakajairika simende dhaka, inogona kuvandudza zvakanyanya simba rekubatanidza pakati pechinhu chakatarisana neiyo substrate, uye ine yakanaka kutsvedza kuramba uye yakanakisa mvura nemvura.Inonyanya kushandiswa kunamira zvinhu zvekushongedza zvakadai sekuvaka mukati uye kunze kwemadziro emadziro mataira, pasi tiles, etc. Inoshandiswa zvakanyanya mukati nekunze kwemadziro, pasi, imba yekugezera, kicheni uye dzimwe nzvimbo dzekushongedza chivako.Parizvino ndiyo inonyanya kushandiswa Tile bonding zvinhu.
Kazhinji kana isu tichitonga kushanda kweadhesive tile, isu hatisi kungoteerera kune yayo yekushanda kwekuita uye anti-sliding kugona, asi zvakare teerera kune yayo mechanical simba uye kuvhura nguva.Cellulose ether in tile adhesive haingokanganisa rheological properties ye porcelain adhesive, yakadai sekushanda kwakatsetseka, banga rinonamatira, nezvimwewo, asi inewo simba rakasimba pamagetsi emagetsi ekunamatira tile.
2. Mhedzisiro panguva yekuvhura yekunamatira tile
Kana rabha hupfu uye serulosi eteri kubatanidzwa mune nyoro dhaka, mamwe data mienzaniso inoratidza kuti rabha upfu ane simba kinetic simba kubatanidza simende hydration zvigadzirwa, uye cellulose ether riripo zvakawanda ari interstitial fluid, izvo zvinokanganisa zvakawanda Mortar viscosity uye nokuisa nguva.Kurwisana kwepamusoro kwe cellulose ether yakakwirira kudarika iyo yehupfu hwerabha, uye kuwedzera kweselulosi ether kupfumisa pamararamiro ematope kuchabatsira pakuumbwa kwehydrogen bond pakati pepasi pepasi uye cellulose ether.
Mumatope emvura, mvura iri mudhaka inoputika, uye cellulose ether inowedzerwa pamusoro, uye firimu ichaumbwa pamusoro pevhu mukati memaminitsi mashanu, izvo zvinoderedza kuderera kwemhepo kunotevera, sezvo mvura yakawanda ichiitwa. yakabviswa kubva kune yakakora dhaka Chikamu chacho chinotamira kune yakaonda dhaka layer, uye firimu rakaumbwa pakutanga rinopedzwa zvishoma, uye kutama kwemvura kuchaunza mamwe serulosi eteri kupfumisa pamusoro pevhu pevhu.
Nokudaro, kuumbwa kwefirimu ye cellulose ether pamusoro pevhu ine simba guru pakuita kwedhaka.1) Iyo firimu yakaumbwa yakanyanyisa kuonda uye ichanyungudutswa kaviri, iyo isingagoni kudzikamisa kubuda kwemvura uye kuderedza simba.2) Iyo firimu yakaumbwa yakanyanyisa kukora, kusangana kwe cellulose ether mumatope interstitial fluid yakakwirira, uye viscosity yakakwirira, saka hazvisi nyore kuputsa firimu repamusoro kana matiles akaiswa.Zvinogona kuonekwa kuti firimu-inogadzira zvinhu zve cellulose ether ine simba guru pane yakazaruka nguva.Mhando ye cellulose ether (HPMC, HEMC, MC, etc.) uye dhigirii ye etherification (inotsiva dhigirii) inobata zvakananga maitiro ekugadzira mafirimu e cellulose ether, uye kuoma uye kuoma kwefirimu.
3. Pesvedzero pasimba rekudhirowa
Pamusoro pekupa zvinhu zvinobatsira zvakataurwa pamusoro apa, cellulose ether inononotsawo hydration kinetics ye simenti.Uku kudzoreredza mhedzisiro kunonyanya kukonzerwa nekushambadza kwe cellulose ether mamorekuru pane akasiyana mamineral phases musimende system iri hydrated, asi kazhinji kutaura, kubvumirana ndeyekuti cellulose ether mamorekuru anonyanya kushambadzirwa pamvura yakaita seCSH uye calcium hydroxide.Pazvigadzirwa zvemakemikari, hazviwanzo kushambadzirwa pane yekutanga mineral phase ye clinker.Mukuwedzera, cellulose ether inoderedza kufamba kweion (Ca2+, SO42-, ...) mumushonga wepore nekuda kwekuwedzera viscosity yepore solution, nokudaro kunowedzera kunonoka hydration process.
Viscosity imwe inokosha parameter, iyo inomiririra maitiro emakemikari e cellulose ether.Sezvambotaurwa pamusoro apa, viscosity inonyanya kukanganisa simba rekuchengetedza mvura uye inewo mhedzisiro yakakosha pakushanda kwedhaka nyowani.Zvisinei, zvidzidzo zvekuedza zvakawana kuti viscosity ye cellulose ether inenge isina simba pane simenti hydration kinetics.Huremu hwemamorekuru hune huremu hushoma pane hydration, uye musiyano mukuru pakati pezviyero zvakasiyana zvemamorekuru ndeye 10min chete.Naizvozvo, huremu hwemamorekuru haisi iyo yakakosha parameter yekudzora simenti hydration.
Kunonoka kwe cellulose ether kunoenderana nekugadzirwa kwekemikari, uye maitiro akazara akagumisa kuti, kune MHEC, iyo yakakwirira yedhigirii ye methylation, iyo inononoka zvishoma ye cellulose ether.Mukuwedzera, iyo inononoka ye hydrophilic substitution (yakadai sekushandura HEC) yakasimba kudarika iyo ye hydrophobic substitution (yakadai sekushandura MH, MHEC, MHPC).Kudzoreredza mhedzisiro ye cellulose ether inonyanya kukanganiswa nezvikamu zviviri, rudzi uye huwandu hwemapoka anotsiva.
Kuongorora kwedu kwakarongeka kwakawanawo kuti zviri mukati mezvitsigiso zvinoita basa rakakosha musimba remagetsi remataira anonamira.Isu takaongorora mashandiro eHPMC neakasiyana madhigirii ekutsiva mumatairi adhesives, uye akaedza mhedzisiro ye cellulose ethers ine mapoka akasiyana-siyana pasi pemamiriro akasiyana ekurapa paMigumisiro pamichina yezvigadzirwa zvematairi adhesives.
Muyedzo, tinotarisa HPMC, inova ether yemukomboni, saka tinofanira kuisa iyo mifananidzo miviri pamwechete.Kune HPMC, inoda imwe dhigirii yekunyura kuti ive nechokwadi chekunyungudika kwayo kwemvura uye kutapurirana kwechiedza.Isu tinoziva zvirimo zvezvinotsiva Iyo zvakare inotarisisa tembiricha yegel yeHPMC, iyo inotemesawo nzvimbo yekushandisa yeHPMC.Nenzira iyi, izvo zveboka zveHPMC zvinowanzo shanda zvakare zvakarongwa mukati mechikamu.Muchikamu ichi, nzira yekubatanidza methoxy uye hydroxypropoxy Kuti tiwane yakanakisa mhedzisiro ndizvo zviri mukutsvaga kwedu.Mufananidzo 2 unoratidza kuti mukati mehumwe huwandu, kuwedzera kwemukati methoxyl mapoka kuchaita kuti kuderera kwemaitiro ekudhonza-kunze kwesimba, nepo kuwedzera kwemukati meiyo hydroxypropoxyl mapoka kuchaita kuti kuwedzera kwesimba rekudhonza-kunze. .Pane mhedzisiro yakafanana pamaawa ekuvhura.
Shanduko yesimba remagetsi pasi penguva yakavhurika mamiriro inowirirana neiyo pasi peyakajairika tembiricha mamiriro.HPMC ine yakakwira methoxyl (DS) yemukati uye yakaderera hydroxypropoxyl (MS) yemukati ine kunaka kuoma kwefirimu, asi ichakanganisa dhaka rakanyorova pane kudaro.zvinhu wetting properties.
Nguva yekutumira: Jan-09-2023