Ukuncamathelisa kwethayile sesinye sezona zicelo zikhulu zodaka olukhethekileyo oluxutyiweyo okwangoku. Olu luhlobo lwesamente njengeyona nto ingundoqo yesamente kwaye incediswa ngamabakala adityanisiweyo, ii-agent zokugcina amanzi, ii-agent zamandla zakuqala, i-latex powder kunye nezinye izongezo ze-organic okanye ze-inorganic. umxube. Ngokuqhelekileyo, kufuneka ixutywe namanzi kuphela xa isetyenziswa. Xa kuthelekiswa nodaka oluqhelekileyo lwesamente, lunokuphucula kakhulu amandla okudibanisa phakathi kwezinto ezijongene nazo kunye ne-substrate, inokumelana nokutyibilika okulungileyo kwaye inokumelana nokuxhathisa kwamanzi kunye nokuxhathisa ukushisa. Kwaye iingenelo zokuxhathisa umjikelo wokuqhwala, ikakhulu ezisetyenziselwa ukuncamathelisa iithayile zodonga lwangaphakathi kunye nangaphandle, iithayile zomgangatho kunye nezinye izinto zokuhombisa, ezisetyenziswa ngokubanzi kwiindonga zangaphakathi nangaphandle, imigangatho, amagumbi okuhlambela, iikhitshi kunye nezinye iindawo zokuhombisa izakhiwo, okwangoku eyona nto isetyenziswa ngokubanzi i-ceramic tile bonding imathiriyeli.
Ngokuqhelekileyo xa sigweba ukusebenza kwe-adhesive ye-tile, asiyi kuqwalasela kuphela ukusebenza kwayo kunye nekhono lokuchasana ne-sliding, kodwa sinikele ingqalelo kumandla ayo omatshini kunye nexesha lokuvula.Iselulosi etherkwi-adhesive tile ayichaphazeli nje kuphela iimpawu ze-rheological ze-adhesive porcelain, ezifana nokusebenza kakuhle, ukunamathela kommese, njl. Impembelelo kwixesha lokuvula lokunamathela kwi-tile
Xa i-emulsion powder kunye ne-cellulose ether zikhona kwi-mortar emanzi, ezinye iinkcukacha zibonisa ukuba i-emulsion powder inamandla e-kinetic anamandla okuncamathela kwiimveliso ze-samente hydration, kunye ne-cellulose ether ikhona ngakumbi kwi-interstitial fluid, echaphazela udaka lwe-viscosity kunye nexesha lokubeka. Uxinzelelo lwangaphezulu lwe-cellulose ether luphezulu kunomgubo we-emulsion, kunye ne-cellulose ether enrichment kwi-interface yodaka iya kuba luncedo ekubunjweni kweebhondi ze-hydrogen phakathi kwesiseko sesiseko kunye ne-cellulose ether.
Kudaka olumanzi, amanzi kumdaka aphuphuma, kwaye i-cellulose ether iyatyetyiswa phezu komhlaba, kwaye ifilimu iya kwenziwa phezu kodaka ngaphakathi kwemizuzu emi-5, eya kunciphisa izinga lokunyuka komphunga, njengoko amanzi amaninzi enziwa. isuswe kudaka olungqindilili Inxalenye yayo ifudukela kumaleko odaka obhityileyo, kwaye ifilimu eyenziwe ekuqaleni ichithwa ngokuyinxenye, kwaye ukufuduka kwamanzi kuya kuzisa ngakumbi ukutyetyiswa kwe-cellulose etere kumphezulu wodaka.
Ngoko ke, ukubunjwa kwefilimu ye-cellulose ether ebusweni bodaka kunempembelelo enkulu ekusebenzeni kodaka.
I-1) Ifilimu eyenziwe incinci kwaye iya kuchithwa kabini, ayikwazi ukukhawulela ukukhuphuka kwamanzi kunye nokunciphisa amandla.
I-2) Ifilimu eyenziwe ininzi kakhulu, i-concentration ye-cellulose ether kwi-mortar interstitial liquid iphezulu, kwaye i-viscosity iphezulu, ngoko akulula ukuphula ifilimu yomhlaba xa iileyili zifakwe.
Ingabonwa ukuba iipropati zokwenza ifilimu ye-cellulose ether inempembelelo enkulu kwixesha elivulekileyo. Uhlobo lwe-cellulose ether (i-HPMC, i-HEMC, i-MC, njl.) kunye ne-degree of etherification (i-substitution degree) ichaphazela ngokuthe ngqo iipropati zefilimu ze-cellulose ether, kunye nobunzima kunye nokuqina kwefilimu.
Ukongeza ekunikezeni iipropati eziluncedo ezikhankanywe ngasentla kwidaka, i-cellulose ether iphinda ilibazise i-hydration kinetics ye-samente. Esi siphumo sokunciphisa ubukhulu becala kubangelwa ukubhengezwa kweemolekyuli ze-cellulose ether kwizigaba ezahlukeneyo zeminerali kwinkqubo yesamente ifakwe i-hydrated, kodwa ukuthetha ngokubanzi, ukuvumelana kukuba iimolekyuli ze-cellulose ether zibhengezwa kakhulu emanzini afana ne-CSH kunye ne-calcium hydroxide. Kwiimveliso zeekhemikhali, kunqabile ukuba kubhengezwe kwinqanaba lokuqala leminerali ye-clinker. Ukongeza, i-cellulose ether iyanciphisa ukuhamba kwe-ion (Ca2 +, SO42-, ...) kwisisombululo se-pore ngenxa yokwanda kwe-viscosity yesisombululo se-pore, ngaloo ndlela ilibazise ngakumbi inkqubo yokucoca.
I-Viscosity yenye iparameter ebalulekileyo, emele iimpawu zekhemikhali ze-cellulose ether. Njengoko kukhankanyiwe ngasentla, i-viscosity ichaphazela kakhulu amandla okugcina amanzi kwaye inefuthe elibalulekileyo ekusebenzeni kodaka olutsha. Nangona kunjalo, uphononongo lovavanyo lufumanise ukuba i-viscosity ye-cellulose ether phantse ayinasiphumo kwi-cement hydration kinetics. Ubunzima bemolekyuli bunempembelelo encinci kwi-hydration, kwaye umahluko omkhulu phakathi kobunzima beemolekyuli ezahlukeneyo yi-10min kuphela. Ke ngoko, ubunzima bemolekyuli abuyiyo iparameter ephambili yokulawula i-cement hydration.
"Ukusetyenziswa kwe-Cellulose Ether kwi-Cement-Based Dry-Mixed Mortar Products" yabonisa ukuba ukubuyiswa kwe-cellulose ether kuxhomekeke kwisakhiwo sayo samakhemikhali. Kwaye umkhwa oqhelekileyo uqukunjelwe kukuba kwi-MHEC, iqondo eliphezulu le-methylation, i-ether encinci ye-retading effect ye-cellulose ether. Ukongezelela, isiphumo sokunciphisa i-hydrophilic substitution (efana nokutshintshwa kwe-HEC) inamandla kunokuba i-hydrophobic substitution (efana nokutshintshwa kwe-MH, i-MHEC, i-MHPC). Isiphumo sokubuyiswa kwe-cellulose ether sichatshazelwa ikakhulu ziiparamitha ezimbini, uhlobo kunye nobuninzi bamaqela abambeleyo.
Iimvavanyo zenkqubo ziphinde zafumanisa ukuba umxholo wabaxumi udlala indima ebalulekileyo kumandla omatshini wokunamathela kwi-tile. Kwi-HPMC, iqondo elithile lokubonelela liyafuneka ukuze kuqinisekiswe ukunyibilika kwayo kwamanzi kunye nokuhanjiswa kokukhanya. Umxholo wababambeleyo ukwamisela amandla e-HPMC. Ubushushu bejeli bukwamisela indawo yokusetyenziswa kweHPMC. Ngaphakathi koluhlu oluthile, ukunyuka kumxholo wamaqela e-methoxyl kuya kuzisa ukuhla kwamandla okukhupha amandla, ngelixa ukwanda komxholo wamaqela e-hydroxypropoxyl kuya kukhokelela ekunciphiseni amandla okukhupha. ukunyuka kwendlela. Kukho umphumo ofanayo kwiiyure zokuvula.
Utshintsho lwamandla omatshini phantsi kwexesha elivulekileyo lihambelana naloo nto phantsi kweemeko eziqhelekileyo zokushisa. I-HPMC enomxholo ophezulu we-methoxyl (DS) kunye nomxholo ophantsi we-hydroxypropoxyl (MS) unobunzima obuhle befilimu, kodwa iya kuchaphazela udaka olumanzi ngokuchaseneyo. iimpawu zokumanzisa izinto.
Ixesha lokuposa: Dec-12-2022