Kudaka olusele luxutywe, intwana nje ye-cellulose ether inokuphucula kakhulu ukusebenza kodaka olumanzi. Ingabonwa ukuba i-cellulose ether iyongezwa enkulu echaphazela ukwakhiwa kodaka. Ukukhetha i-cellulose ethers yeentlobo ezahlukeneyo, i-viscosities eyahlukeneyo, ubukhulu beentlobo ezahlukeneyo, iidigri ze-viscosity ezahlukeneyo kunye neemali ezongezelelweyo nazo zineempembelelo ezahlukeneyo ekuphuculeni ukusebenza kodaka olomileyo. Okwangoku, ezininzi iimasonry kunye ne-plastering mortars zineempawu ezimbi zokugcina amanzi. I-slurry yamanzi iya kuhlukana emva kokuyishiya yodwa imizuzu embalwa. Ngoko ke, kubaluleke kakhulu ukongeza i-cellulose ether kudaka lwesamente. Makhe sijonge ngokweenkcukacha imisebenzi ye-cellulose ether kudaka lwesamente!
1.Ukugcinwa kwamanzi ether-cellulose
Ukugcinwa kwamanzi kuyipropathi ebalulekileyo ye-cellulose ether, kwaye ikwayipropati ukuba abaninzi abenzi bodaka basekhaya abaxubeneyo, ngakumbi abo bakummandla osezantsi kunye nokushisa okuphezulu, banikele ingqalelo. Kwimveliso yezinto zokwakha, ngakumbi udaka oluxubeneyo oluxubeneyo, i-cellulose ether idlala indima engenakulinganiswa, ngakumbi kwimveliso yodaka olukhethekileyo (udaka olulungisiweyo), luyinto eyimfuneko kwaye ibalulekileyo.
I-viscosity, i-dosage, ubushushu be-ambient kunye nesakhiwo semolekyuli ye-cellulose ether inempembelelo enkulu ekusebenzeni kwayo kokugcinwa kwamanzi. Phantsi kweemeko ezifanayo, ubukhulu be-viscosity ye-cellulose ether, ngcono ukugcinwa kwamanzi; okukhona idosi iphezulu, kokukhona ugcino lwamanzi lungcono. Ngesiqhelo, isixa esincinci se-cellulose ether inokuphucula kakhulu izinga lokugcinwa kwamanzi odaka. Xa idosi ifikelela kwinqanaba elithile, umkhwa wokunyusa izinga lokugcinwa kwamanzi uyancipha; ukugcinwa kwamanzi kwi-ether ye-cellulose ngokuqhelekileyo kuncipha ngokunyuka kobushushu be-ambient, kodwa ezinye ii-ethers ze-cellulose ezilungisiweyo nazo zinokugcinwa kakuhle kwamanzi phantsi kweemeko eziphezulu zokushisa; I-cellulose ethers enedigri esezantsi yokutshintsha inokusebenza okungcono kogcino lwamanzi.
Amaqela e-hydroxyl kwi-cellulose ether molecules kunye nee-athomu ze-oksijini kwiibhondi ze-ether ziya kwenza iibhondi ze-hydrogen kunye neamolekyu zamanzi, ukuguqula amanzi akhululekile kumanzi adibeneyo, ngaloo ndlela adlale indima enhle ekugcineni amanzi; ukusasazwa okulinganayo phakathi kweeamolekyu zamanzi kunye ne-cellulose ether i-molecular chain ivumela iimolekyuli zamanzi ukuba zingene ngaphakathi kwe-cellulose ether macromolecular chain kwaye zixhomekeke kwizithintelo ezinamandla, ngaloo ndlela zenza amanzi akhululekile kunye namanzi adibeneyo, ngaloo ndlela kuphuculwe ukugcinwa kwamanzi kwi-slurry ye-samente; i-cellulose ether iphucula iipropati ze-rheological, i-porous network structure kunye noxinzelelo lwe-osmotic ye-slurry entsha ye-samente, okanye i-film-forming properties ye-cellulose ether ithintela ukusasazwa kwamanzi.
2.I-cellulose ether-thickening kunye ne-thixotropy
I-ether ye-cellulose inika udaka olumanzi i-viscosity egqwesileyo, enokunyusa kakhulu amandla okudibanisa phakathi kodaka olumanzi kunye nomgangatho wesiseko, kunye nokuphucula ukusebenza kwe-anti-sag yodaka. Isetyenziswa ngokubanzi kudaka lokutyabeka, udaka lwe-tile bonding kunye neenkqubo zokugquma eludongeni lwangaphandle. Isiphumo esityebileyo se-ether ye-cellulose sinokunyusa ukuxhathisa kwe-dispersion kunye ne-homogeneity yezinto ezitsha, ukuthintela i-delamination yezinto, ulwahlulo kunye nokopha, kwaye ingasetyenziselwa kwikhonkrithi yefiber, ikhonkrithi engaphantsi kwamanzi kunye ne-self-compacting concrete.
Umphumo wokuqina we-cellulose ether kwizinto ezisekelwe kwisamente zivela kwi-viscosity yesisombululo se-cellulose ether. Ngaphantsi kweemeko ezifanayo, i-viscosity ephezulu ye-cellulose ether, ingcono i-viscosity yezinto eziguquliweyo ezisekelwe kwi-samente. Nangona kunjalo, ukuba i-viscosity iphezulu kakhulu, iya kuchaphazela i-fluidity kunye nokusebenza kwezinto (njengokunamathela kwi-plaster knife). Iifama zokuzilinganisa kunye nekhonkrithi ezizidibanisayo ezifuna i-fluidity ephezulu zifuna i-viscosity ephantsi ye-cellulose ether. Ukongeza, isiphumo esityebileyo se-cellulose ethers sandisa imfuno yamanzi yezixhobo ezisekelwe kwisamente kwaye kwandisa isivuno sodaka.
I-high-viscosity cellulose ether isisombululo samanzi sine-thixotropy ephezulu, ekwayimpawu enkulu ye-cellulose ether. Izisombululo ezimanzi ze-methylcellulose ngokubanzi zineepropathi ze-pseudoplastic, ezingekho-thixotropic ezingaphantsi kobushushu bejeli yazo, kodwa zibonisa iipropathi ezihamba ngeNewtonian kumazinga aphantsi okucheba. I-Pseudoplasticity iyanda ngokunyuka kobunzima be-molecular okanye i-concentration ye-cellulose ether, kungakhathaliseki ukuba luhlobo luni kunye neqondo lokutshintshwa kwe-substitute. Ngoko ke, i-cellulose ethers yebakala elifanayo le-viscosity, nokuba i-MC, i-HPMC, okanye i-HEMC, iya kuhlala ibonisa iimpawu ezifanayo ze-rheological nje ukuba ugxininiso kunye nobushushu bugcinwa rhoqo. Xa izinga lokushisa linyuka, i-gel yesakhiwo yenziwa kwaye ukuhamba okuphezulu kwe-thixotropic kwenzeka.
Ugxininiso oluphezulu kunye ne-viscosity ephantsi ye-cellulose ethers ibonisa i-thixotropy nangaphantsi kobushushu be-gel. Lo mhlaba unenzuzo enkulu ekulungiseni umgangatho kunye neepropathi zokudodobala kodaka lwesakhiwo ngexesha lolwakhiwo. Kufuneka kuqatshelwe apha ukuba i-viscosity ephezulu ye-ether cellulose, ngcono ukugcinwa kwamanzi, kodwa i-viscosity iphezulu, iphezulu ubunzima be-molecular ye-ether cellulose, kunye nokunyibilika kwayo kuncipha ngokufanelekileyo, okunempembelelo embi Ugxininiso lodaka kunye nokusebenza kolwakhiwo.
3.I-cellulose ether-air entraining effect
I-ether ye-Cellulose inefuthe elibalulekileyo lokufaka umoya kwizinto ezintsha ezisekwe kwisamente. I-cellulose ether inamaqela amabini e-hydrophilic (amaqela e-hydroxyl, amaqela e-ether) kunye namaqela e-hydrophobic (amaqela e-methyl, amakhonkco e-glucose). Yi-surfactant esebenza ngaphezulu kwaye ke inefuthe lokungenisa umoya. Umphumo wokungenisa umoya we-cellulose ether uya kuvelisa umphumo "webhola", onokuphucula ukusebenza kwezinto ezixutywe ngokutsha, ezifana nokwandisa iplastiki kunye nokuguquguquka komdaka ngexesha lokusebenza, okunenzuzo kwi-paving of mortar; iya kwandisa imveliso yodaka kwaye inciphise iindleko zokuvelisa udaka; kodwa iya kwandisa i-porosity yezinto eziqiniweyo kunye nokunciphisa iimpawu zabo zomatshini ezifana namandla kunye ne-elastic modulus.
Njenge-surfactant, i-ether ye-cellulose nayo inomphumela wokumanzisa okanye wokuthambisa kumasuntswana e-samente, ethi kunye nefuthe layo lokungena emoyeni linyusa umbane wezinto ezisekelwe kwisamente, kodwa umphumo wayo wokuqina uya kunciphisa umbane. Umphumo we-cellulose ether kwi-fluidity yezinto ezisekelwe kwi-samente yindibaniselwano yeplastiki kunye nemiphumo yokuqina. Ngokuqhelekileyo, xa idosi ye-cellulose ether iphantsi kakhulu, ibonakala ngokubonakalayo njengeplastiki okanye umphumo wokunciphisa amanzi; xa idosi iphezulu, isiphumo sokutyeba se-cellulose ether yonyuka ngokukhawuleza, kwaye umphumo wayo wokungenisa umoya uthande ukugcwala, ngoko ke ubonakala njengesiphumo sokuqina okanye ukwanda kwemfuno yamanzi.
4.I-cellulose ether-retarding effect
I-ether ye-cellulose iya kwandisa ixesha lokucwangcisa i-samente intlama okanye udaka kunye nokulibazisa i-cement hydration dynamics, enenzuzo ukunyusa ixesha lokusebenza kwezinto ezintsha zokuxuba kunye nokuphucula ilahleko exhomekeke kwixesha le-mortar consistency kunye ne-concrete slump, kodwa inokuba nayo. ulibazise inkqubela yolwakhiwo.
Ixesha lokuposa: Sep-24-2024