IHydroxypropyl Methylcellulose (HPMC)yinto ebalulekileyo ye-cellulose ether compound esetyenziswa ngokubanzi kwizinto zokwakha, ngakumbi kwi-samente-based mortars, izinto ezisekelwe kwi-gypsum-based and coatings. I-HPMC idlala indima ebalulekileyo ekuphuculeni iipropati zodaka, kubandakanywa nokuphucula iimpawu zayo zokuthintela amanzi.
1. Ukuphucula ukugcinwa kwamanzi odaka
Enye yezona zinto ziqaphelekayo ze-HPMC kukugcina umthamo wayo obalaseleyo wamanzi. Ukongeza i-HPMC kudaka kunokunciphisa kakhulu izinga lokulahleka kwamanzi kudaka. Ukusebenza okuthe ngqo kuku:
Yandisa ixesha le-cement hydration reaction: I-HPMC inokugcina ukufuma okufanelekileyo ngaphakathi kodaka kunye nokuqinisekisa ukuba amasuntswana e-samente asabela ngokupheleleyo ngamanzi ukwenza imveliso ye-denser hydration.
Ukuthintela ukubunjwa kwee-cracks: Ukulahleka kwamanzi okukhawuleza kunokubangela ukuba udaka lunciphise kwaye luqalise i-micro-cracks, ngaloo ndlela ukunciphisa iimpawu zokukhusela amanzi.HPMCinokucothisa izinga lokulahleka kwamanzi kwaye inciphise iintanda ezibangelwa kukushwabana okomileyo.
Ukuphuculwa kokusebenza kokugcinwa kwamanzi kwenza isakhiwo sangaphakathi se-denser ye-mortar, sinciphisa i-porosity, kwaye siphucule ngokubonakalayo ukungahambi kakuhle kodaka, ngaloo ndlela kuphucula ukusebenza kwawo kwamanzi.
2. Ukuphucula ukusebenza kodaka
Iimpawu ze-viscosity ze-HPMC ziphucula iipropati ze-rheological zodaka, ngaloo ndlela ziphucula ukusebenza kwayo:
Ukunciphisa ukopha: I-HPMC inokusasaza amanzi ngokulinganayo, ivumela amanzi ukuba asasazwe ngokuzinzileyo kwidaka kunye nokunciphisa i-pores ebangelwa kukwahlukana kwamanzi.
Ukuphucula ukunamathela kodaka: I-HPMC iphucula amandla okubambisana phakathi kodaka kunye nesiseko sezinto, ukuvumela udaka ukuba lugqume umphezulu wezinto ezisisiseko ngokusondeleyo, ngaloo ndlela kuncitshiswe amathuba okuba ubumanzi bungene ngomsantsa phakathi kwezinto ezisisiseko kunye nodaka. .
Ukuphuculwa komgangatho wokwakha kuchaphazela ngokuthe ngqo umphumo wokungangeni kwamanzi wodaka. Umaleko ofanayo noxineneyo wokugquma udaka unokuthintela ngokufanelekileyo ukungena kokufuma.
3. Yenza ifilimu ekhusela umphezulu
I-HPMC ineempawu zokwenza ifilimu kwaye inokwenza ifilimu ekhuselayo nexineneyo kumphezulu wodaka:
Nciphisa izinga lokumka kwamanzi: Emva kokuba ukwakhiwa kugqityiwe, i-HPMC iya kwenza ifilimu ekhuselayo kumphezulu wodaka ukunciphisa ukufunxa kokufuma ngaphakathi kodaka yimekobume yangaphandle.
Vimba ukungena komswakama: I-HPMC umaleko emva kokubunjwa kwefilimu inomlinganiselo othile wokungena kwamanzi kwaye ingasetyenziselwa njengesithintelo sokuthintela umswakama wangaphandle ukuba ungene ngaphakathi kodaka.
Olu khuselo lomphezulu lunikeza ukhuseleko olongezelelweyo kwiipropati zokuthintela amanzi zodaka.
4. Ukunciphisa i-porosity yodaka
I-HPMC inokuphucula ngokufanelekileyo i-microstructure yodaka. Indlela yokusebenza kwayo ngolu hlobo lulandelayo:
Isiphumo sokuzalisa: Iimolekyuli ze-HPMC zinokungena kwisakhiwo se-microporous kwi-mortar kwaye ngokuyinxenye zizalise ii-pores, ngaloo ndlela zinciphisa imigudu yokufuma.
Ukuphucula ukuxinana kweemveliso ze-hydration: Ngokugcina amanzi, i-HPMC iphucula ukufana kunye nokuqina kweemveliso ze-samente ze-hydration kunye nokunciphisa inani lee-pores ezinkulu kwi-mortar.
Ukunciphisa i-porosity ye-mortar akugcini nje ukuphucula ukusebenza kokuthintela amanzi, kodwa kuphucula ukuqina komdaka.
5. Ukuphucula ukumelana neqabaka kunye nokuqina
Ukungena kwamanzi kuya kubangela ukuba udaka lonakaliswe ngenxa yeqabaka ebhudlayo kwindawo yobushushu obuphantsi. Isiphumo sokungangenwa kwamanzi se-HPMC sinokunciphisa ukungena kwamanzi kwaye sinciphise umonakalo wodaka obangelwa yimijikelo yokunyibilika komkhenkce:
Thintela ukugcinwa kokufuma: Nciphisa ukugcinwa kokufuma ngaphakathi kodaka kwaye unciphise ifuthe lokunyuka kweqabaka.
Ubomi bodaka olongeziweyo: Ngokunciphisa uhlaselo lwamanzi kunye nomonakalo owenziwe ngumkhenkce, i-HPMC yonyusa ukuqina kwexesha elide lodaka.
I-HPMC iphucula ukusebenza kwamanzi omdaka ngokusebenzisa le miba ilandelayo: ukuphucula ukugcinwa kwamanzi, ukulungelelanisa ukusebenza kakuhle, ukwenza ifilimu ekhuselayo, ukunciphisa i-porosity kunye nokuphucula ukuxhathisa iqabaka. Impembelelo ye-synergistic yezi mpawu yenza ukuba udaka lubonise iziphumo ezingcono zokungangeni kwamanzi kwizicelo eziphathekayo. Nokuba kukumadaka okuthintela amanzi, udaka oluzilinganisayo okanye izinto zokuncamathelisa iithayile,HPMCidlala indima ebalulekileyo.
Kwizicelo ezisebenzayo, isixa se-HPMC esongeziweyo kufuneka siphuculwe ngokweemfuno ezithile zokuqinisekisa ukuba ayinakwenza kuphela isiphumo esigqwesileyo sokuthintela amanzi, kodwa nokugcina ibhalansi yezinye izikhombisi zokusebenza zodaka. Ngokusetyenziswa okunengqiqo kwe-HPMC, ukusebenza kokungena kwamanzi kwezixhobo zokwakha kunokuphuculwa kakhulu kwaye ukhuseleko oluthembekileyo lunokubonelelwa kwiiprojekthi zokwakha.
Ixesha lokuposa: Nov-23-2024