I-HPMC (iHydroxypropyl Methylcellulose)sisixhobo sekhemikhali sepolymer esisetyenziswa kakhulu kushishino lokwakha. Sisetyenziswa kakhulu kwi-mortar esekelwe kwisamente, kwi-mortar exutywe nomileyo, kwi-adhesives nakwezinye iimveliso ukuze siqine, sigcine amanzi, siphucule. Sinemisebenzi emininzi efana nokunamathela kunye nokusebenza ngcono kokwakha. Indima yaso kwi-mortar ibaluleke kakhulu, ingakumbi ekuphuculeni ukumelana nokuqhekeka kwe-mortar.
1. Ukugcinwa kwamanzi okwandisiweyo
I-HPMC inokugcina amanzi kakuhle, nto leyo ethetha ukuba amanzi akayi kutsha ngokukhawuleza ngexesha lokwakhiwa kwe-mortar, ngaloo ndlela kuthintelwe ukuqhekeka okubangelwa kukulahleka kwamanzi kakhulu. Ingakumbi kwiindawo ezomileyo nezishushu kakhulu, isiphumo sokugcina amanzi se-HPMC sibalasele kakhulu. Ukufuma kwi-mortar kunokuhlala kuzinzile ixesha elithile ukuze kuthintelwe ukoma kwangethuba, nto leyo ebaluleke kakhulu ekuphuculeni ukumelana nokuqhekeka kwe-mortar. Ukugcinwa kwamanzi kunokulibazisa inkqubo yokufunxa isamente, okuvumela amasuntswana esamente ukuba aphendule ngokupheleleyo namanzi ixesha elide, ngaloo ndlela kwandisa ukumelana nokuqhekeka kwe-mortar.
2. Phucula ukunamathela kwesamente
Njengesithambisi-manzi, i-HPMC inokwenza isakhiwo esihle senethiwekhi yeemolekyuli kwi-mortar ukuze yonyuse ukunamathelana kunye nokugeleza kwe-mortar. Oku akuphuculi nje kuphela amandla okubopha phakathi kwe-mortar kunye ne-base layer kwaye kunciphisa ukuqhekeka kwe-interface layer, kodwa kuphucula nokuqina kwayo yonke i-mortar kwaye kunciphisa ukwenzeka kwee-cracks ezibangelwa yimikhosi yangaphandle ngexesha lenkqubo yokwakha. Ukunamathela kakuhle kwenza i-mortar ifane ngakumbi ngexesha lokwakha kwaye kunciphisa ii-cracks ezibangelwa bubukhulu obungalinganiyo kwiindawo zokudibanisa.
3. Ukuphucula i-plasticity kunye nokusebenza kakuhle kwesamente
I-HPMC iphucula ukuqina kwesinyithi kunye nokusebenza kwesinyithi, nto leyo enokuphucula ngokufanelekileyo ulwakhiwo. Ngenxa yempembelelo yaso yokutyeba, i-HPMC inokwenza isinyithi sibe nokunamathelana okungcono kunye nokwakheka, inciphise ngempumelelo ukuvela kwemingxunya ebangelwa yisinyithi esingalinganiyo kunye nokungaguquguquki kakuhle ngexesha lokwakhiwa. Ukuqina kwesinyithi okulungileyo kwenza isinyithi sibe noxinzelelo olulinganayo ngexesha lokomiswa nokuncitshiswa, inciphise amathuba okuba kubekho imingxunya ngenxa yoxinzelelo olungalinganiyo.
4. Nciphisa ukuqhekeka kokuncipha
Ukuncipha okomileyo kukuncipha komthamo okubangelwa kukufuma kwamanzi ngexesha lenkqubo yokomisa i-mortar. Ukuncipha okomileyo kakhulu kuya kubangela ukuqhekeka kumphezulu okanye ngaphakathi kwe-mortar. I-HPMC iyacothisa ukufuma kwamanzi ngokukhawuleza kwaye inciphise ukwenzeka kokuqhekeka okomileyo ngenxa yeziphumo zayo eziphezulu zokugcina amanzi kunye nokuphucula i-plasticity. Uphando lubonisa ukuba i-mortar eyongezwe nge-HPMC inesantya esiphantsi sokufuma kwaye umthamo wayo awutshintshi kangako ngexesha lenkqubo yokomisa, ngaloo ndlela ithintela ngempumelelo ukuqhekeka okubangelwa kukuqhekeka kokomisa. Kwiindonga okanye phantsi ezinkulu, ingakumbi ehlotyeni elishushu okanye kwiindawo ezinomoya owomileyo nezomileyo, indima ye-HPMC ibaluleke kakhulu.
5. Phucula ukumelana nokuqhekeka kwesamente
Ulwakhiwo lwemolekyuli ye-HPMC lunokwenza ukusebenzisana kweekhemikhali ezithile nesamente kunye nezinye izinto ezingaphiliyo kwisamente, nto leyo eyenza ukuba isamente ibe nokumelana okukhulu nokuqhekeka emva kokuqina. La mandla okuqhekeka aphuculweyo awaveli nje kuphela ekudibaneni ne-HPMC ngexesha lenkqubo yokufunxa isamente, kodwa akwaphucula nokuqina kwesamente ukuya kwinqanaba elithile. Ukuqina kwesamente emva kokuqina kuyaphucuka, nto leyo eyinceda ukuba imelane noxinzelelo olukhulu lwangaphandle kwaye ayichaphazeleki kukuqhekeka. Ingakumbi kwiindawo ezinomahluko amakhulu obushushu okanye utshintsho olukhulu kwimithwalo yangaphandle, i-HPMC inokuphucula ngempumelelo ukumelana nokuqhekeka kwesamente.
6. Yandisa ukungangenwa kwesamente
Njengezinto zepolymer eziphilayo, i-HPMC inokwenza isakhiwo senethiwekhi esincinci kwi-mortar ukuphucula ubuncinci be-mortar. Olu phawu lwenza i-mortar ingangeni kakhulu kwaye inciphise ukungena komswakama kunye nezinye izinto zangaphandle. Kwimeko efumileyo okanye emanzi, iintanda kumphezulu nangaphakathi kwe-mortar zinokuhlaselwa bumswakama, nto leyo ekhokelela ekwandeni ngakumbi kweentanda. Ukongezwa kwe-HPMC kunokunciphisa ngempumelelo ukungena kwamanzi kwaye kuthintele ukwanda kweentanda ezibangelwa kukungena kwamanzi, ngaloo ndlela kuphucule ukumelana kweentanda kwe-mortar ukuya kwinqanaba elithile.
7. Nqanda ukuveliswa nokwandiswa kwee-micro-cracks
Ngexesha lenkqubo yokomisa nokuqinisa i-mortar, ii-micro crack zihlala zisenzeka ngaphakathi, kwaye ezi micro crack zinokukhula kancinci kancinci kwaye zenze ii-cracks ezibonakalayo phantsi kwesenzo samandla angaphandle. I-HPMC inokwenza isakhiwo senethiwekhi esifanayo ngaphakathi kwe-mortar ngokusebenzisa isakhiwo sayo se-molecular, inciphisa amathuba okuba ii-micro-cracks zivele. Nokuba ii-micro-cracks zenzeka, i-HPMC inokudlala indima ethile yokulwa nee-cracks kwaye izithintele ekwandeni okungakumbi. Oku kungenxa yokuba ii-polymer chain ze-HPMC zinokusasaza ngempumelelo uxinzelelo kumacala omabini e-crack ngokusebenzisana kwe-intermolecular kwi-mortar, ngaloo ndlela zithintela ukwanda kwe-crack.
8. Phucula i-modulus ye-elastic yesamente
I-modulus elastiki luphawu olubalulekileyo lokukwazi kwezinto ukumelana nokuguquka. Kwi-mortar, i-modulus elastiki ephezulu inokuyenza izinze ngakumbi xa iphantsi kwamandla angaphandle kwaye ingabi nokubangela ukuguquka okanye ukuqhekeka okugqithisileyo. Njenge-plasticizer, i-HPMC inokunyusa i-modulus yayo elastiki kwi-mortar, ivumela i-mortar ukuba igcine imo yayo ngcono phantsi kwesenzo samandla angaphandle, ngaloo ndlela inciphisa ukwenzeka kokuqhekeka.
I-HPMCIphucula ngokufanelekileyo ukumelana nokuqhekeka kwesamente kwiinkalo ezininzi ngokuphucula ukugcinwa kwamanzi, ukunamathela, i-plasticity kunye nokusebenza kwesamente, ukunciphisa ukuvela kokuqhekeka okomileyo, kunye nokuphucula amandla okuxhathisa ukuqhekeka, ukungangeni kunye nokusebenza kwe-elastic modulus. Ke ngoko, ukusetyenziswa kwe-HPMC kwisamente yokwakha akunakuphucula kuphela ukumelana nokuqhekeka kwesamente, kodwa kukwaphucula nokusebenza kokwakha kwaye kwandise ubomi benkonzo yesamente.
Ixesha leposi: Disemba-16-2024