Udaka lwe-EPS lwamasuntswana olugqumayo sisixhobo sokugquma esikhaphukhaphu esenziwe ngokuxuba izibophelelo ezingaphiliyo, izibophelelo zezinto eziphilayo, imixube, izongezelelo kunye neeaggregates zokukhanya ngokomlinganiselo othile. Phakathi kwe-EPS particles insulation mortars ngoku efundwayo kwaye isetyenziswe, i-latex powder ehlaziywayo inefuthe elikhulu ekusebenzeni kodaka, i-akhawunti yexabiso eliphezulu leendleko, kwaye ihlala igxininisekile. Ukusebenza kwebhondi ye-EPS ye-particle particle insulation mortar yangaphandle inkqubo yokugquma eludongeni ubukhulu becala ivela kwi-polymer binder, equlunqwe ubukhulu becala nge-vinyl acetate/ethylene copolymers. Ukutshiza ukomisa kolu hlobo lwe-polymer emulsion kunokuvelisa i-latex powder ephinda iphindwe. I-redispersible latex powder iye yaba yindlela yophuhliso ekwakhiweni ngenxa yokulungiswa kwayo ngokuchanekileyo, ukuthutha okufanelekileyo kunye nokugcinwa okulula. Ukusebenza kwe-EPS particle insulation mortar kuxhomekeke kakhulu kuhlobo kunye nobungakanani bepolymer esetyenzisiweyo. I-ethylene-vinyl acetate powder (EVA) enomxholo ophezulu we-ethylene kunye ne-Tg ephantsi (i-glass transition lokushisa) ixabiso linomsebenzi ogqwesileyo kumandla empembelelo, amandla okubambisana kunye nokuchasana kwamanzi.
Umgubo wepolymer odispersible umhlophe, unolwelo olulungileyo, unobungakanani bamasuntswana afanayo emva kokusasazwa kwakhona, kwaye unokusasazeka okuhle. Emva kokudibanisa namanzi, i-latex powder particles ingabuyela kwi-emulsion state yangaphambili kwaye igcine iimpawu kunye nemisebenzi njenge-binder yezinto eziphilayo. Indima yepolymer powder edispersible kwi-thermal insulation mortar ilawulwa ziinkqubo ezimbini: i-cement hydration kunye ne-polymer powder film formation. Inkqubo yokwenziwa kwenkqubo edityanisiweyo ye-cement hydration kunye ne-polymer powder film formation igqitywe ngala manyathelo mane alandelayo:
(1)Xa i-latex powder ixutywe kunye nodaka lwesamente, iinqununu ze-polymer ezintle ezihlakaziweyo zihlakazwe ngokulinganayo kwi-slurry.
(2) Ijeli ye-cement yenziwa ngokuthe ngcembe kwipolymer / i-samente paste ngokusebenzisa i-hydration ye-samente, isigaba se-liquid sigcwele i-calcium hydroxide eyenziwe ngexesha lenkqubo yokucoca, kwaye iinqununu ze-polymer zifakwe kwindawo ye-cement gel / i-unhydrated. iqhekeza lesamente umxube.
(3)Njengoko ukwakhiwa kwejeli ye-samente kukhula, amanzi asetyenziswa kwaye amaqhekeza e-polymer ngokuthe ngcembe avalelwe kwii-capillaries. Njengoko i-samente iqhubela phambili i-hydrates, amanzi kwii-capillaries ayancipha kwaye iinqununu ze-polymer ziqokelela phezu komgangatho we-sement gel / unhydrated particle particle mix and light aggregates, okwenza i-layer eqhubekayo kwaye ifakwe ngokuqinileyo. Ngeli xesha, ii-pores ezinkulu zizaliswe ngamaqhekeza e-polymer ancamathelayo okanye azimele.
(4) Ngaphantsi kwesenzo se-cement hydration, isiseko sokufunxa kunye nokunyuka komphezulu, umthamo wokufuma uyancitshiswa ngakumbi, kwaye amasuntswana e-polymer ahlanganiswe ngokuqinileyo kwi-aggregate ye-samente ye-samente kwifilimu eqhubekayo, edibanisa iimveliso ze-hydration kunye ukwenza isakhiwo esipheleleyo sothungelwano. , kunye nesigaba se-polymer sifakwe kuyo yonke i-cement hydration slurry.
I-cement hydration kunye ne-latex powder film-forming composition zenza inkqubo entsha edibeneyo, kwaye umphumo wabo odibeneyo uphucula kwaye uphucule ukusebenza kwe-thermal insulation mortar.
Impembelelo yokongeza umgubo wepolymer kumandla odaka obushushu bokufakelwa kwe-thermal
I-polymer mesh ebhetyebhetye kakhulu kunye nenwebeka kakhulu inwebu eyenziwe ngumgubo welatex iphucula kakhulu ukusebenza kodaka lokugquma i-thermal, ngakumbi amandla okuqina aphuculwe kakhulu. Xa kusetyenziswe amandla angaphandle, ukuvela kwe-micro-cracks kuya kulungiswa okanye kuncitshiswe ngenxa yokuphuculwa kokubambisana ngokubanzi komdaka kunye nokuqina kwepolymer.
Amandla okuqina odaka lwe-thermal insulation ayanda ngokunyuka komxholo wepolymer powder; amandla okuguquguquka kunye namandla acinezelayo ayancipha ukuya kwinqanaba elithile ngokunyuka komxholo we-latex powder, kodwa usenakho ukuhlangabezana neemfuno zomhlobiso wangaphandle wodonga. I-compression flexure incinci, ebonisa ukuba i-thermal insulation mortar inokuguquguquka okulungileyo kunye nokusebenza kokuguqulwa.
Izizathu eziphambili zokuba kutheni i-polymer powder iphucula amandla e-tensile zezi: ngexesha le-coagulation kunye nokuqina kwenkqubo yodaka, i-polymer iya kuxutywa kwaye yenze ifilimu kwindawo yokutshintsha phakathi kweengqungquthela ze-EPS kunye ne-cement paste, eyenza i-interface phakathi kwe-denser ezimbini kwaye inamandla; inxalenye yepolymer ihlakazwa kwi-sement paste kwaye igxininiswe kwifilimu ebusweni be-sement hydrate gel ukwenza inethiwekhi yepolymer. Le nethiwekhi ye-elastic modulus polymer ephantsi iphucula ukuqina kwesamente eqinile; amaqela athile e-polar kwiimolekyuli ze-polymer angaphinda aphendule ngeekhemikhali kunye neemveliso ze-samente ze-hydration ukwenza imiphumo ekhethekileyo yokudibanisa, ngaloo ndlela iphucula isakhiwo somzimba wemveliso ye-samente ye-samente kunye nokunciphisa uxinzelelo lwangaphakathi, ngokunciphisa ukuveliswa kwe-microcracks kwi-paste ye-samente.
Impembelelo yedosi yomgubo wepolymer enokuphinda ihlakazwe ekusebenzeni kokusebenza kwe-EPS yodaka lokufakelwa kwe-thermal
Ngokunyuka kwe-latex powder dosage, ukubumbana kunye nokugcinwa kwamanzi kuphuculwe kakhulu, kwaye ukusebenza komsebenzi kuphuculwe. Xa i-dosage ifikelela kwi-2.5%, inokuhlangabezana ngokupheleleyo neemfuno zokwakha. Ukuba i-dosage ininzi kakhulu, i-viscosity ye-EPS ye-thermal insulation mortar iphezulu kakhulu kwaye i-fluidity iphantsi, engabangeli ukwakhiwa, kwaye iindleko zodaka zinyuka.
Isizathu sokuba i-polymer powder ikhulise ukusebenza kodaka kukuba i-polymer powder iyipolymer ephezulu ye-molecular kunye namaqela e-polar. Xa i-polymer powder ixutywe kunye neengqungquthela ze-EPS, iinqununu ze-non-polar kwi-chain chain ye-polymer powder ziya kusebenzisana kunye neengqungquthela ze-EPS. I-adsorption ye-Physical iyenzeka kwi-non-polar surface ye-EPS. Amaqela e-polar kwi-polymer ajoliswe ngaphandle kwi-particle ye-EPS, okwenza iinqununu ze-EPS zitshintshe ukusuka kwi-hydrophobic ukuya kwi-hydrophilic. Ngenxa yempembelelo yokuguqulwa kwepowder latex ebusweni beengqungquthela ze-EPS, ingxaki yokuba iinqununu ze-EPS zibonakaliswe ngokulula kumanzi zixazululwa. Ingxaki yokudada kunye nokubekwa kodaka olukhulu. Xa i-samente yongezwa kwaye ixutywe ngeli xesha, amaqela e-polar adsorbed kumphezulu weengqungquthela ze-EPS zidibanisa kunye ne-samente kwaye zidibene ngokusondeleyo, ngaloo ndlela ziphucula kakhulu ukusebenza kwe-EPS insulation mortar. Oku kubonakala kwinto yokuba iinqununu ze-EPS zimanziswa ngokulula nge-samente slurry, kwaye amandla okudibanisa phakathi kwezi zibini aphuculwe kakhulu.
Umgubo wepolymer odispersible yinxalenye eyimfuneko yokusebenza okuphezulu kwe-EPS ye-particle insulation slurry. Indlela yokusebenza kwayo kukuba iinqununu ze-polymer kwinkqubo zidibanisa kwifilimu eqhubekayo, idibanisa iimveliso ze-samente ze-samente kunye zenze isakhiwo sothungelwano esipheleleyo kunye nokudibanisa ngokuqinileyo kunye neengqungquthela ze-EPS. Inkqubo edityanisiweyo yomgubo wepolymer edispersible kunye nezinye izibophelelo zinesiphumo esihle esithambileyo esithambileyo, esiphucula kakhulu ukomelela kokuqina kwe-bonding kunye nokusebenza kokwakhiwa kwe-EPS particle insulation mortar.
Ixesha lokuposa: Dec-30-2024