Shrinkage ngezinto zokwakha cementiwe, ezinjenge-zodonga kanye nokhonkolo, kuyinkinga ejwayelekile engaholela ebuthakathakeni beqhekekile nobuthakathaka bezinhlelo. Le nto yenzeka ngenxa yokulahleka kwamanzi kusuka enhlanganisweni, okuholela ekunciphiseni kwevolumu. Amasu ahlukahlukene aqashwa ukunciphisa i-shrinkage, enye yazo efaka ukufakwa kwe-polymer powder (RDP). I-RDPS isetshenziswa kabanzi ezintweni zokwakha ukuthuthukisa izakhiwo ezinjengokunamathela, ukuguquguquka nokugcinwa kwamanzi.
Ukwakheka kanye nendlela ye-RDP
Redispersible polymer powders are produced by spray drying aqueous dispersions of polymers, typically derived from vinyl acetate-ethylene (VAE), styrene-butadiene, or acrylic copolymers. Uma kungezwe ukuxubeka okulomile, ama-RDPs angahle abuyiselwe emanzini, akha ukusakazwa okuzinzile okuzimisele okuthembisa ukuthi amanzi avele avele avele, akha ifilimu ye-polymer ngaphakathi kwe-matrix ene-cecmentix.
Indlela ye-RDP yehlisa i-shrinkage yayo i-multifaceted:
Ukugcinwa kwamanzi: I-RDPS ithuthukisa umthamo wokugcina amanzi wengxube. Lokhu kunweba inqubo ye-hydration ye-CEUND, kunciphisa ukushwabana kokuqala okudala okwenzeka ngenxa yokulahleka kwamanzi okusheshayo.
Ukwakheka kwamafilimu: Njengoba izinhlayiya ze-RDP zifaka ifilimu eqhubekayo, zakha inethiwekhi eguquguqukayo engathola ezinye izingcindezi ezibangelwa yi-shrinkage, ngaleyo ndlela zinciphise ukwakheka kwe-shrinkage, ngaleyo ndlela kunciphise ukwakheka kwe-shrinka.
Ukubumbana okuthuthukile kanye nokuvumelana nezimo: Inethiwekhi ye-polymer ithuthukisa ukuguquguquka okujwayelekile kwezinto ezilukhuni, ukuvumela ukuthi kumelane kangcono nokuxineka okubangelwa yi-shrinkage.
Ukwelapha kwangaphakathi: Izinhlayiya ze-polymer zingasebenza njengezinsuku zokugcina amanzi, kancane kancane ziyikhulula ngokuhamba kwesikhathi futhi zinikeze ukwelashwa kwangaphakathi. Lokhu kunciphisa ukuthuthukiswa kokucindezela kwe-shrinkage ngesikhathi sokuphumula okubucayi kokuqala.
Imiphumela ekunciphiseni kwe-shrinkage
Ukugeleza kweminyaka yobudala
Ukuqothuka kokuqala, kwenzeka kungakapheli amahora angama-24 kuye kwangama-48 ngemuva kokuxubana, ngokuyinhloko kungenxa yokulahleka kwamanzi kusuka ku-worder entsha noma ukhonkolo. I-RDPS ibamba iqhaza elikhulu ekunciphiseni lolu hlobo lwe-shrinkage ngo:
Ukunciphisa ukuhwamuka: Ifilimu le-polymer elingamandla ebusweni linciphisa izinga lokuhwamuka kwamanzi, ngaleyo ndlela lagcina umswakama ophakeme ophakeme ngaphakathi kokuqukethwe.
Ukuthuthukisa izimo zokwelapha: Ngokugcina amanzi ngaphakathi kwengxube isikhathi eside, ama-RDPs asiza ukuqinisekisa ukuthi izinto zokwenza i-hydration zibhekene ne-hydration efanelekile, zinciphisa ukwenzeka kokuqhekeka kwepulasitiki.
Ukomisa i-shrinkage
Ukomisa i-Shrinkage kwenzeka isikhathi eside njengoba impahla ilahlekelwa amanzi endaweni ezungezile. I-RDPS mitigani ukuyomisa i-shrinkage ngezindlela eziningana:
I-Polymer film Fleemmal Ukuvumelana nezimo: Inethiwekhi eguquguqukayo ye-polymer ngaphakathi kwe-matrix ingakhubazeka kancane ngaphandle kokuqhekeka, ukuhlalisa izinguquko ezibucayi ezihambisana nokomiswa.
Ukusatshalaliswa kwengcindezi: Ukuba khona kwenethiwekhi ye-polymer kusiza ukusabalalisa izingcindezi zangaphakathi ngokulinganayo, kunciphisa amathuba okugxila kokucindezela kwasendaweni okungaholela ekuqhekekeni.
Ukuncishiswa kwamabutho we-capillary: Ifilimu le-polymer ngaphakathi kwama-capillary pores linciphisa amabutho we-capillary ngxabano aqhuba i-shrinkage, ngaleyo ndlela anciphise ubunzima be-shrinkage.
Izinzuzo ezisetshenzisweni zokwakha
Ukuqina okuthuthukile
Ukufakwa kwe-RDP kuzinto zokwakha cementile kungaze kunciphise ukushwabana kodwa futhi kukhulisa ukuqina. Ifilimu le-polymer eliguqukayo elingama-matrix lingavimba ama-microcracks, livikele ukusakazwa kwalo kube imifantu emikhulu ebeka ubuqotho bezinhlekelele. Lokhu kuholela ekuphikiseni ukwanda kwezici zezemvelo ezinjengemijikelezo ye-freeze-thaw, ukuhlasela kwamakhemikhali, kanye nokuhlukunyezwa.
Ukusebenza okwenziwe ngcono
UDodep-Modified Modified Bonders futhi ukhombise ukukhombisa ukusebenza okuthuthukile, okwenza kube lula ukusebenzisa futhi baqede. Lokhu kungazuzisa kakhulu kwizicelo ezidinga indawo ebushelelezi, engenacala, njengokuqeda phansi noma ekuhlobiseni okuhlobisa.
Ukunamathela namandla e-bond
I-RDPS Thuthukisa ukunamathela kwezinto zokwakha u-cementionate kuya ezingxenyeni ezahlukahlukene, kufaka phakathi ukhonkolo, ubumbano kanye nensimbi. Lokhu kubalulekile kuzinhlelo zokusebenza ezinjengezinamathelatha ze-tile, ukulungisa izidakamizwa, kanye nezinhlelo zangaphandle zokufakelwa, lapho amandla aqinile e-bond aqakathekile ekusebenzeni nasekude.
Ukuguquguquka kwesicelo
I-RDPS ingasetshenziswa emikhiqizweni ehlukahlukene yokwakha, kufaka phakathi izinamathiseli ze-tile, amakhompiyutha okuzenzela, ukulungisa ama-dotrars, kanye nezinhlelo zokufaka kwe-thermalt yangaphandle (Etics). Amandla abo okunciphisa i-shrinkage futhi athuthukise ezinye izakhiwo abenze ukuba abe yisengezo esiguquguqukayo esifanele izimo ezahlukahlukene zokwakha.
Izifundo zamacala nezinhlelo zokusebenza ezisebenzayo
Adhesives tile
Ezinamathele ezinamathelayo, ama-rdps adlala indima ebalulekile ekwehliseni i-shrinkage, eqinisekisa ukuthi amathayili ahlala eboshwe ngokuqinile ngaphandle kwengozi yokuhlunga noma ukuqhekeka. Ukunamathela okuthuthukisiwe kanye nokuvumelana nezimo okunikezwe yi-RDPs nakho kwamukela ukunyakaza okuncane ngaphakathi kwe-substrate, ukuvikela ukuqongelela kwengcindezi esibonakalayo sethayela.
Ukulungisa udaka
Ukulungiswa kohlobo oluguqulwe ngombukiso we-RDP anciphise i-shrinkage encishisiwe, okubalulekile ukuvimbela ukwakheka kwemifantu emisha ezinhlakeni ezilungisiwe. Ukunamathelisa okuthuthukile kanye nokuhlangana nakho kuyaqinisekisa ukuthi izibopho zokulungisa kahle ngesakhiwo esivele zikhona, zinikeza ikhambi elihlala isikhathi eside.
Amakhompiyutha Wokuzindla
Ezihlanganisweni ezizimele, ama-RDPs anikela ngempama ebushelelezi, ngisho nangaphezulu nge-shrinkage encane. Lokhu kubaluleke kakhulu kuzinhlelo zokusebenza lapho isitezi sezinga sibucayi, njengakuzilungiselelo zezimboni noma zentengiso.
Ama-polymer polymer powders adlala indima ebaluleke kakhulu ekwehliseni i-shrinkage ngezinto zokwakha u-cementionate, ngaleyo ndlela ethuthukisa ukuqina, ukusebenziseka, kanye nokusebenza okuphelele kwemikhiqizo yokwakha. Ngezindlela ezifana nokugcinwa kwamanzi, ukwakheka kwamafilimu, ukusatshalaliswa kwengcindezi, ama-RDPs anciphisa ukushesha kanye nokomisa ukushwabana, ukubhekana nenselele ekwakheni. Ukusebenza kwemali okuhlukahlukene nokusebenza kwazo kubenza babe ngesengezo esibalulekile ezinhlelweni eziningi zezicelo, kusuka ezinamatheks Ngokufaka ama-RDPs, imboni yezokwakha ingafinyelela isikhathi eside, ithembekile, kanye nemiphumela emnandi ye-aesthetically, okufaka isandla ekuseni nasekufezeni izakhiwo ezakhiwe.
Isikhathi sePosi: Feb-18-2025