Cement-based tile adhesive ndiyo yakakura kushandiswa kweyazvino yakakosha yakaoma-yakasanganiswa dhaka. Iyo imhando ye organic kana inorganic admixture ine simende sechinhu chikuru chekuisa simende uye inowedzerwa negiredhi aggregate, kuchengetedza mvura mumiriri, yekutanga simba mumiriri uye latex hupfu. musanganiswa. Kazhinji, inongoda kusanganiswa nemvura. Kana ichienzaniswa neyakajairika simende dhaka, inogona kuvandudza zvakanyanya simba rechisungo pakati pechinhu chakatarisana neiyo substrate, ine yakanaka anti-slip pfuma uye ine yakanakisa kudzivirira kwemvura uye kupisa kupisa. Inoshandiswawo pakushongedza kwemukati nekunze kwemadziro emadziro, pasi tiles uye zvimwe zvekushongedza zvinhu. Inoshandiswa zvakanyanya mukushongedza kwemukati nekunze kwemadziro, pasi, dzimba dzekugezera, makicheni, etc. Ndiyo tile inonyanya kushandiswa. Bonding zvinhu.
Kazhinji, kana isu tichitonga kushanda kweadhesive tile, tinofanira kuterera kune simba rayo remagetsi uye nguva yekuvhura kunze kwekushanda kwayo kwekushanda uye kukwanisa kupesana-kutsvedza. Mukuwedzera kune kukanganisa rheological properties ye porcelain rubber, yakadai sekutsetseka kwekushanda, mamiriro ekunamatira banga, nezvimwewo, cellulose ether ine simba rakasimba pamagetsi emagetsi ekunamatira tile.
1. Nguva yekuvhura
RiniRedispersible polymer hupfuuyecellulose etherkugarisana mudhaka rakanyorova, mamwe mamodheru e data anoratidza kuti rubber poda ine simba rekinetic rakasimba rakasungirirwa kune simende hydration chigadzirwa, uye cellulose ether inowanikwa mu interstitial fluid, iyo inokanganisa zvakanyanya. Iyo viscosity uye nguva yekugadzika yedhaka. Kudzvinyirirwa kwepamusoro kwe cellulose ether yakakura kudarika iyo yehupfu hwerabha, uye kupfumisa mamwe cellulose ether pamatope interface kunobatsira kuumba hydrogen bond pakati pepasi pepasi uye cellulose ether.
Mudhaka rakanyorova, mvura iri mudhaka inoputika, iyo cellulose ether inopfumiswa pamusoro, uye firimu rinoumbwa pamusoro pevhu mukati me5 maminetsi, izvo zvinoderedza kunotevera kwekubuda kwemvura, sezvo mvura yakawanda ichiwedzera kubva muvhu. dhaka. Chikamu chekufamba kuenda kune yakatetepa dhaka redhaka, kuvhurwa kwekutanga kwe membrane kunonyungudika zvishoma, uye kutama kwemvura kunounza mamwe cellulose ether kumusoro kwedhaka.
Iyo firimu kuumbwa kwe cellulose ether pamusoro pedhaka ine simba guru pakuita kwedhaka:
Kutanga, iyo firimu yakaumbwa yakanyanya kuonda, ichanyungudutswa kaviri, haigone kudzikamisa kubuda kwemvura, kuderedza simba.
Chechipiri, iyo firimu yakaumbwa yakanyanyisa, kusanganiswa kwe cellulose ether mumatope interstitial fluid yakakwirira, uye viscosity yakakura. Kana iyo tile yakanamatira, hazvisi nyore kuputsa firimu repamusoro.
Kubva pane izvi, zvinonzwisiswa kuti iyo firimu inogadzira zvinhu zve cellulose ether ine simba rakakura panguva yekuvhura. Mhando ye cellulose ether (HPMC,HEMC, MC, etc.) uye dhigirii ye etherification (degree of substitution) inobata zvakananga maitiro ekugadzira firimu ye cellulose ether, uye kuoma uye kuoma kwefirimu.
2, simba
Mukuwedzera pakupa zvinhu zvakasiyana-siyana zvinobatsira zvinotsanangurwa pamusoro apa kune dhaka, cellulose ether inodzosa hydration kinetics ye simenti. Uku kunonoka kunonyanya kukonzerwa nekushambadza kwe cellulose ether mamorekuru pane akasiyana mamineral phases muhydrated simende system, asi kazhinji kutaura, cellulose ether mamorekuru anonyanya kuvharirwa pamvura seCSH uye calcium hydroxide. Pachigadzirwa chemakemikari, haiwanzo kushambadzirwa pane yekutanga mineral phase ye clinker. Mukuwedzera, nekuda kwekuwedzera kwe viscosity yemushonga wepore, cellulose ether inoderedza kufamba kweion (Ca2 +, SO42-, ...) mumushonga wepore, nokudaro kunowedzera kunonoka hydration process.
Viscosity ndiyo imwe parameter yakakosha inomiririra makemikari e-cellulose ethers. 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 hydration kinetics ye simenti. Huremu hwemamorekuru hune huremu hushoma pane hydration, uye mutsauko mukuru pakati pehuremu hwemamorekuru ingori gumi maminetsi. Naizvozvo, huremu hwemamorekuru haisi iyo yakakosha parameter yekudzora simende hydration.
"Kushandiswa kweCellulose Ether muCement-Based Dry-mixed Mortar Products" inotaura zvakajeka kuti kunonoka kwe cellulose ether kunoenderana nemakemikari ayo. Maitiro akapfupikiswa ndeokuti kune MHEC, iyo yakakwira dhigirii yemethylation, iyo idiki kunonoka kwe cellulose ether. Mukuwedzera, hydrophilic substitutions (yakadai sekushandura kuHEC) inonyanya kudzvinyirira kupfuura hydrophobic substitutions (yakadai sekushandura kuMH, MHEC, MHPC). Iko kudzoreredza mhedzisiro ye cellulose ether inonyanya kukanganiswa nemaparamita maviri erudzi uye huwandu hweboka rinotsiva.
Yedu yekuongorora system yakawanawo kuti zviri mukati mezvitsigiso zvinoita basa rakakosha musimba remagetsi rekunamatira tile. Isu takaongorora mashandiro eHPMC nemadhigirii akasiyana ekutsiva mune inonamatira mataira, uye takaedza cellulose ether pairs nemapoka akasiyana pasi pemamiriro akasiyana ekurapa. Kupesvedzera kweiyo mechanical properties yeadhesive tile, Figure 2 uye Figure 3 ndiyo mhedzisiro yekuchinja mune methoxy (DS) content uye hydroxypropoxy (MS) zvirimo pane kudonhedza-pasi simba retairi adhesive pakamuri tembiricha.
Mufananidzo 2
Mufananidzo 3
Mumuedzo, tinoonaHydroxypropyl methyl cellulose (HPMC), inova ether yakaoma. Naizvozvo, tinofanira kubatanidza nhamba mbiri pamwe chete. Kune HPMC, tinoda chinopihwa kuti tive nechokwadi chekunyungudika kwemvura uye kutapurirana kwechiedza. Isu tinoziva zviri mukati mezvinotsiva. Iyo inotarisawo tembiricha yegel yeHPMC, iyo inosarudza nharaunda umo HPMC inoshandiswa. Naizvozvo, zvirimo zveinowanzo shandiswa HPMC zvakare yakaumbwa mune siyana. Maitiro ekubatanidza methoxy uye hydroxypropoxy mapoka mune ino siyana Kuti tiwane zvakanakisa mhedzisiro ndizvo zvatinodzidza. Mufananidzo 2 unoratidza kuti mukati mehumwe huwandu, kuwedzera kwemethoxyl kunounza kudzika kwesimba rekudhonza, nepo hydroxypropoxyl yemukati ichiwedzera uye simba rekudhonza richiwedzera. Kwenguva yakazaruka, kune maitiro akafanana.
Nguva yekutumira: Dec-18-2018