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 kunye nashushu 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