I-EPS particle insulation mortar iyinto engasindi yokwahlukanisa eyenziwe ngokuxuba izibophezelo ze-organic, izihlanganisela, izithasiselo nama-aggregate okukhanya ngengxenye ethile. Phakathi kwezinhlayiya ze-EPS zokufakelwa kwezinhlayiyana ezifundwayo okwamanje futhi zisetshenziswe, i-latex powder ephindwe kabusha inomthelela omkhulu ekusebenzeni kodaka, ilandisa ngenani eliphezulu lezindleko, futhi ibilokhu igxile kakhulu ekunakeni. Ukusebenza okuhlanganisiwe kwe-EPS yezinhlayiyana zokufakelwa kwesistimu yokufaka udonga lwangaphandle ikakhulukazi kuvela ku-polymer binder, ehlanganiswe kakhulu ne-vinyl acetate/ethylene copolymers. Futha ukomiswa kwalolu hlobo lwe-polymer emulsion kungakhiqiza impushana ye-latex ephinda ihlakazeka. I-latex powder ye-redispersible isiphenduke inkambiso yentuthuko ekwakhiweni ngenxa yokulungiselela kwayo okunembayo, ukuthutha okulula kanye nokugcinwa okulula. Ukusebenza kwe-EPS particle insulation mortar kuncike kakhulu ohlotsheni nenani le-polymer esetshenzisiwe. I-Ethylene-vinyl acetate powder (EVA) enokuqukethwe okuphezulu kwe-ethylene kanye ne-Tg ephansi (izinga lokushisa lokushintsha kwengilazi) linokusebenza okuhle kakhulu kumandla omthelela, amandla okubopha kanye nokumelana namanzi.
Impushana ye-polymer ehlakazeka kabusha imhlophe, inoketshezi oluhle, inosayizi wezinhlayiyana ezifanayo ngemva kokuhlakazeka kabusha, futhi inokuhlakazeka okuhle. Ngemuva kokuxubana namanzi, izinhlayiya ze-latex powder zingabuyela esimweni sazo se-emulsion sokuqala futhi zigcine izici nemisebenzi njenge-organic binder. Indima yempushana ye-polymer ehlakazeka kabusha odakeni lwe-thermal insulation ilawulwa yizinqubo ezimbili: ukufakwa kukasimende kanye nokwakheka kwefilimu ye-polymer powder. Inqubo yokwakhiwa kwesistimu eyinhlanganisela ye-cement hydration kanye nokwakheka kwefilimu ye-polymer powder iqedwa ngezinyathelo ezine ezilandelayo:
(1)Lapho i-latex powder ixutshwa nodaka lukasimende, izinhlayiya ze-polymer ezihlakazekile zihlakazeka ngokulinganayo odongeni.
(2) Ijeli kasimende kwakheka kancane kancane ku-polymer/usimende unama ngokusebenzisa i-hydration kasimende, isigaba soketshezi sigcwala i-calcium hydroxide eyakhiwe ngesikhathi senqubo yokukhipha amanzi, futhi izinhlayiya ze-polymer zifakwa engxenyeni yobuso bejeli kasimende / engenawo amanzi. ingxube yezinhlayiyana zikasimende.
(3)Njengoba isakhiwo sejeli sikasimende sikhula, amanzi ayasetshenziswa futhi izinhlayiya ze-polymer kancane kancane zivalelwe kuma-capillaries. Njengoba usimende eqhubeka nokufaka amanzi, amanzi kuma-capillaries ayancipha futhi izinhlayiya ze-polymer ziqoqana ebusweni bengxube ye-cement gel / i-unhydrated yezinhlayiyana ze-cement kanye nama-aggregates okukhanya, okwenza ungqimba oluqhubekayo noluhlanganiswe ngokuqinile. Kuleli qophelo, izimbotshana ezinkulu zigcwele izinhlayiya ze-polymer ezinamathelayo noma ezizinamathelayo.
(4)Ngaphansi kwesenzo sikasimende, ukumuncwa kwesisekelo kanye nokuhwamuka kwendawo, umswakama uyancipha ngokwengeziwe, kanye nezinhlayiya ze-polymer ezipakishwe ngokuqinile esilinganisweni sikasimende se-hydrate ibe ifilimu eqhubekayo, ehlanganisa imikhiqizo ye-hydration ndawonye ukwakha isakhiwo senethiwekhi esiphelele. , futhi isigaba se-polymer sihlanganiswe kulo lonke udaka lukasimende lwe-hydration.
I-Cement hydration kanye ne-latex powder-forming film composition yakha isistimu entsha eyinhlanganisela, futhi umphumela wayo ohlangene uthuthukisa futhi uthuthukise ukusebenza kwe-thermal insulation mortar.
Umthelela wokwengezwa kwempushana ye-polymer emandleni e-thermal insulation mortar
I-polymer mesh membrane eguquguquka kakhulu futhi enwebeka kakhulu eyenziwe yi-latex powder ithuthukisa kakhulu ukusebenza kwe-thermal insulation mortar, ikakhulukazi amandla aqinile athuthukiswa kakhulu. Uma kusetshenziswa amandla angaphandle, ukuvela kwama-micro-cracks kuzosuswa noma kuncishiswe ngenxa yokuthuthukiswa kokuhlangana okuphelele kodaka kanye nokunwebeka kwe-polymer.
Amandla aqinile we-thermal insulation mortar akhuphuka ngokwanda kokuqukethwe kwe-polymer powder; amandla aguquguqukayo namandla acindezelayo ancipha ngezinga elithile ngokwanda kokuqukethwe kwe-latex powder, kodwa asengakwazi ukuhlangabezana nezidingo zomhlobiso wangaphandle wodonga. I-compression flexure incane uma kuqhathaniswa, okubonisa ukuthi i-thermal insulation mortar inokuguquguquka okuhle nokusebenza kokuguqulwa.
Izizathu eziyinhloko zokuthi kungani i-polymer powder ithuthukisa amandla e-tensile yilezi: ngesikhathi sokuhlanganisa kanye nenqubo yokuqina kodaka, i-polymer izokhipha i-gel futhi yakhe ifilimu endaweni yoguquko phakathi kwezinhlayiya ze-EPS nokunamathisela usimende, okwenza isikhombimsebenzisi phakathi kwe-denser emibili futhi iqine; ingxenye ye-polymer ihlakazeka ekunamathisele usimende futhi ihlanganiswe ibe ifilimu ebusweni bejeli ye-hydrate ye-samente ukuze yakhe inethiwekhi ye-polymer. Le nethiwekhi ye-elastic modulus polymer ephansi ithuthukisa ukuqina kukasimende oqinile; amaqembu athile e-polar kuma-molecule e-polymer angase asabele ngamakhemikhali ngemikhiqizo ye-cement hydration ukuze enze imiphumela ekhethekile yokuvala ibhuloho, ngaleyo ndlela athuthukise ukwakheka komzimba wemikhiqizo ye-cement hydration kanye nokunciphisa ukucindezeleka kwangaphakathi, ngaleyo ndlela kuncishiswe ukukhiqizwa kwama-microcracks kunamathisele usimende.
Umthelela womthamo we-polymer powder ohlakazeka kabusha ekusebenzeni kokusebenza kwe-EPS thermal insulation mortar
Ngokukhula komthamo we-latex powder, ukubumbana nokugcinwa kwamanzi kuthuthukiswa kakhulu, futhi ukusebenza kokusebenza kuyathuthukiswa. Lapho umthamo ufinyelela ku-2.5%, ungahlangabezana ngokugcwele nezidingo zokwakha. Uma umthamo mkhulu kakhulu, i-viscosity ye-EPS yokufakwa kwe-thermal insulation mortar iphezulu kakhulu futhi i-fluidity iphansi, engahambisani nokwakhiwa, futhi izindleko zodaka ziyanda.
Isizathu sokuthi kungani i-polymer powder ithuthukisa ukusebenza kodaka ukuthi i-polymer powder iyi-polymer ephezulu yamangqamuzana enamaqembu e-polar. Uma i-polymer powder ixutshwa nezinhlayiya ze-EPS, izingxenye ezingezona ze-polar ochungechungeni oluyinhloko lwe-polymer powder zizosebenzisana nezinhlayiya ze-EPS. Ukukhangisa ngokomzimba kwenzeka endaweni engeyona i-polar ye-EPS. Amaqembu e-polar ku-polymer aqondiswe ngaphandle ebusweni bezinhlayiya ze-EPS, okwenza izinhlayiya ze-EPS zishintshe ukusuka ku-hydrophobic kuya ku-hydrophilic. Ngenxa yomphumela wokuguqulwa kwe-latex powder ebusweni bezinhlayiya ze-EPS, inkinga yokuthi izinhlayiya ze-EPS zivezwa kalula emanzini ixazululwa. Inkinga yokuntanta nokwendlaleka kodaka olukhulu. Uma usimende wengezwa futhi uxutshwe ngalesi sikhathi, amaqembu e-polar adsorbed ebusweni bezinhlayiya ze-EPS asebenzisana nosimende futhi ahlanganiswe eduze, ngaleyo ndlela athuthukise kakhulu ukusebenza kwe-EPS insulation mortar. Lokhu kubonakala eqinisweni lokuthi izinhlayiya ze-EPS zimanziswa kalula udaka lukasimende, futhi amandla okubopha phakathi kokubili athuthukiswa kakhulu.
I-polymer powder ehlakazeka kabusha iyingxenye ebalulekile yokusebenza okuphezulu kwe-EPS particle insulation slurry. Indlela yayo yokwenza ngokuyinhloko iwukuba izinhlayiya ze-polymer ohlelweni zihlanganiselwe zibe ifilimu eqhubekayo, ihlanganise imikhiqizo kasimende ye-hydration ndawonye ukuze yakhe isakhiwo senethiwekhi esiphelele futhi ihlanganiswe ngokuqinile nezinhlayiya ze-EPS. Isistimu eyinhlanganisela yempushana ye-polymer ehlakazeka kabusha nezinye izibophezelo zinomphumela omuhle wokunwebeka othambile, othuthukisa kakhulu amandla okubopha okuqinile nokusebenza kokwakhiwa kwe-EPS particle insulation mortar.
Isikhathi sokuthumela: Dec-30-2024