I-Gypsum yinto eqhelekileyo yokwakha esetyenziselwa ukuhlobisa udonga lwangaphakathi nangaphandle.Iyathandwa ngenxa yokuqina kwayo, ubuhle kunye nokumelana nomlilo.Nangona kunjalo, nangona ezi zibonelelo, i-plaster inokuphuhlisa iintanda ngokuhamba kwexesha, enokuthi idibanise ingqibelelo yayo kwaye ichaphazele ukubonakala kwayo.Ukuqhekeka kwePlasta kunokwenzeka ngenxa yezizathu ezahlukeneyo, kubandakanywa izinto ezisingqongileyo, ukwakhiwa okungafanelekanga, kunye nezinto ezisemgangathweni.Kwiminyaka yakutshanje, izongezo ze-hydroxypropyl methylcellulose (HPMC) ziye zavela njengesisombululo sokuthintela ukuqhekeka kwe-plaster.Eli nqaku ligxininisa ukubaluleka kwezongezo ze-HPMC ekuthinteleni iintanda ze-plaster kunye nendlela ezisebenza ngayo.
Ziziphi izongezo ze-HPMC kwaye zisebenza njani?
Izongezo ze-HPMC ziqhele ukusetyenziswa kushishino lokwakha njengee-arhente zokugquma kunye nezilungisi ze-viscosity kwizicelo ezininzi, kubandakanywa ukutyabeka.Ephuma kwi-cellulose, i-soluble emanzini abandayo kwaye ashushu kwaye ngoko ingasetyenziselwa kwizicelo ezahlukeneyo zokwakha.Xa ixutywe namanzi, umgubo we-HPMC wenza into efana nejeli enokuthi ifakwe kwimixube ye-stucco okanye ifakwe njengento yokugquma kumphezulu weendonga ezityatyekiweyo.Ijeli efana nejeli ye-HPMC ivumela ukuba isasazeke ngokulinganayo, ikhusela ukukhuphuka komswakama ngokugqithisileyo kunye nokunciphisa umngcipheko wokuqhekeka.
Inzuzo ebalulekileyo yezongezo ze-HPMC kukukwazi ukulawula izinga le-hydration ye-gypsum, evumela amaxesha afanelekileyo okusetha.Ezi zongezo zenza umqobo obambezela ukukhutshwa kwamanzi, ngaloo ndlela unciphisa ithuba lokumisa ngaphambi kwexesha kunye nokuqhekeka okulandelayo.Ukongeza, i-HPMC inokusasaza amaqamza omoya kumxube wegypsum, onceda ukuphucula ukusebenza kwawo kwaye yenza kube lula ukuyifaka.
Thintela iintanda udaka ngokusebenzisa izongezo HPMC
Ukomisa ukushwabana
Esinye sezizathu eziphambili zokuqhekeka kwe-plaster kukomisa i-shrinkage ye-plaster surface.Oku kwenzeka xa i-stucco yoma kwaye iyancipha, idala ukuxinezeleka okubangela ukuqhekeka.Izongezo ze-HPMC zinokunceda ukunciphisa ukomisa ukushwabana ngokunciphisa izinga apho amanzi aphuphumayo kumxube wegypsum, okukhokelela kulwabiwo lwamanzi ngakumbi.Xa umxube we-plaster unomswakama ohambelanayo, izinga lokumisa lifana, linciphisa umngcipheko wokuqhaqha kunye nokunciphisa.
Ukuxuba okungafanelekanga
Kwiimeko ezininzi, i-plaster exutywe kakubi iya kubangela iindawo ezibuthathaka ezinokuphuka lula.Ukusebenzisa izongezo ze-HPMC kwimixube yegypsum kunokunceda ukuphucula iipropati zokwakha kunye nokwenza inkqubo yokwakha ibe lula.Ezi zongezo zisasaza amanzi ngokulinganayo kulo lonke i-plaster, evumela amandla ahambelanayo kunye nokunciphisa umngcipheko wokuqhekeka.
ukuguquguquka kobushushu
Ukuguquguquka kobushushu obugqithisileyo kunokubangela ukuba i-stucco yande kwaye ifinyeze, idala ukuxinezeleka okunokukhokelela kwiintanda.Ukusetyenziswa kwezongezo ze-HPMC kunciphisa izinga lokunyuka kwamanzi, ngaloo ndlela kucotha inkqubo yokunyanga kunye nokunciphisa umngcipheko wokwandiswa kwe-thermal ngokukhawuleza.Xa udaka loma ngokulinganayo, lunciphisa amathuba okuba iindawo ezihlala kwindawo ethile zome kakhulu, nto leyo ebangela uxinezeleko olunokukhokelela kwiintanda.
Ixesha elaneleyo lokunyanga
Mhlawumbi eyona nto ibalulekileyo kwi-plaster cracking ayikwanelanga ukunyanga ixesha.Izongezo ze-HPMC zicothisa ukukhutshwa kwamanzi kumxube wegypsum, ngaloo ndlela zandisa ixesha lokumisela.Amaxesha amade okunyanga aphucula ukuhambelana kwe-stucco kunye nokunciphisa ukubonakala kwamabala abuthathaka anokuthi aqhekeke.Ukongeza, izongezelelo ze-HPMC zinceda ukudala umqobo ngokuchasene neemeko zemozulu ezinzima ezinokubangela iintanda kwiindawo ezivezwayo.
ukuququmbela
Ukuqhekeka kwi-stucco kuyinto eqhelekileyo kwishishini lokwakha kwaye kunokukhokelela ekulungiseni okuxabisa kakhulu kunye neziphako ezingathandekiyo.Nangona kukho izinto ezininzi ezinokubangela iintanda kwi-plaster, usebenzisa izongezo ze-HPMC sisisombululo esisebenzayo sokuthintela iintanda.Umsebenzi wezongezo ze-HPMC kukwenza umqobo othintela ukuvela komphunga ngokugqithisileyo kokufuma kunye nokunciphisa ukomisa ukuncipha kunye nokwandiswa kwe-thermal.Ezi zongezo zikwaphucula ukusebenza, okukhokelela kumandla angaguqukiyo kunye nomgangatho ongcono wesamente.Ngokudibanisa izongezo ze-HPMC kwimixube yodaka, abakhi banokuqinisekisa indawo ehlala ixesha elide, ebonakalayo enomtsalane.
Ixesha lokuposa: Sep-26-2023