Obstract:Umphumela wokuqukethwe okuhlukile kwe-hydroxypropylllyrlose methyllellulose ether ezingxenyeni zodaka oluhlanganisiwe oluhlanganisiwe olomile. Imiphumela ibonise ukuthi: Ngokukhuphuka kokuqukethwe kwe-cellulose ether, ukuvumelana nobukhulu kuncishisiwe, futhi isikhathi sehle sehle. Ukunwetshwa, amandla acindezelayo angama-7D ne-28D anciphile, kepha ukusebenza kodaka okuxubile sekuthuthukisiwe.
0.PREFACE
Ngo-2007, izinkonzo eziyisithupha kanye namakhomishini wezwe akhiphe "isaziso esenqatshelwe ukuxutshwa kwesisa sodaka kwamanye amadolobha kungakapheli umkhawulo wesikhathi". Njengamanje, amadolobha ayi-127 ezweni lonke awenze umsebenzi we- "wenqabela udaka olukhona", oluletha ukukhula okungakaze kube khona ekuthuthukisweni kodaka oluxutshwe nodaka oluxutshwe. ithuba. Ngokuthuthuka okunamandla kodaka oluhlanganisiwe olokwakha izimakethe zokwakhiwa kwasekhaya nakwamanye amazwe, kufakwe ama-datix ahlukahlukene ahlukahlukene, kepha izinkampani zokuhlanganiswa ezihlanganisiwe zodaka kanye nezinkampani zokuthengisa zeqisa ngamabomu esebenza kahle kwemikhiqizo yazo, edukisa umkhakha womuntu oxutshwe ngamabomu. Ukuthuthuka okunempilo nokuhlelekile. Njengamanje, njengama-admixtures ukhonkolo, ama-malixtures ahlanganisiwe womile asetshenziswa ikakhulukazi ngokuhlanganiswa, futhi ambalwa asetshenziswa yodwa. Ikakhulu, kunezinhlobo eziningi zohlobo lwama-admixtures kwezinye izilonge ezihlanganisiwe ezihlanganisiwe, kepha ngodaka oluxubile oluhlanganisiwe, asikho isidingo sokuphishekela inani le-admixtures, kepha asinakunakwa ngokwengeziwe ukusetshenziswa kwalo kokuphaphama, sikwazi ukugwema ukungcola kwalo, futhi sithinte ikhwalithi yephrojekthi. Olimini olujwayelekile oluhlanganisiwe, i-ether ye-cellulose idlala indima yokugcinwa kwamanzi, ukuqina kanye nokwenza ngcono ukusebenza kokwakha. Ukusebenza okuhle kokugcina amanzi kuqinisekisa ukuthi udaka oluxutshwe omile ngeke lubangele uSanding, uPofaling kanye nokwehliswa kwamandla ngenxa yokushoda kwamanzi kanye nokushoda kosimende ongaphelele; Umphumela wokuqina uthuthukisa kakhulu amandla wesakhiwo sodaka olumanzi. Leli phepha liqhuba isifundo esihlelekile ekusetshenzisweni kwe-cellulose ether ngodaka olulodwa oluhlanganisiwe, olunokuqondisa ukubaluleka kwendlela yokusebenzisa i-admixtures ngodaka ngodaka oluxubile oluhlanganisiwe.
1. Izinto zokusetshenziswa nezindlela ezisetshenziswe esivivinyweni
1.1 Izinto ezingavuthiwe zokuhlolwa
Usimende kwakungu-P. 042.5 usimende, umlotha wefly yi-class II umlotha ovela esimisweni samandla eTaiyuan, i-aggregate ehlelwe yi-hydroxypropylylylylylylylylylylylylylylylylylylylylyllopylylykylth methyl cellulose ether (I-Viscosity 12000 MPA S).
1.2 Indlela yokuhlola
Ukulungiswa kwesampula nokuhlola ukusebenza kwenziwa ngokuya nge-JCJ / T 70-2009 Ukuhlola Ukusebenza Kokusebenza Kokwakhiwa kodaka.
2. Uhlelo lokuhlola
2.1 ifomula lokuhlolwa
Kulolu vivinyo, inani lezinto eziluhlaza ezivuthiwe ze-1 ton yodaka oluhlanganisiwe oluhlanganisiwe lusetshenziswa njengefomula eyisisekelo yokuhlolwa, futhi amanzi ukusetshenziswa kwamanzi okungusimende omile.
2.2 Uhlelo Oluthile
Usebenzisa le formula, inani le-hydroxypropyllose ether elingezwe ethani ngalinye lodaka oluxutshwe ngo-0,0 Ukungaguquguquki, ukuguquguquka okusobala, ukusetha isikhathi, kanye namandla acindezelayo okufaka udaka oluhlanganisiwe oluhlanganisiwe, ukuze kuqondiswe ngodaka olulodwa oluhlanganisiwe ukusetshenziswa kwenqubo yokukhiqiza okuhlanganisiwe kombusi, ukwakhiwa okulula, ukuvikelwa kwemvelo kanye nokonga amandla.
3. Imiphumela yokuhlola nokuhlaziywa
Imiphumela yokuhlola engu-3.1
Imiphumela yemithamo ehlukene ye-hydroxypropylylyll methylcellulose ether ekugcinweni kwamanzi, ukungaguquguquki, ukuqina okusobala, ukusetha isikhathi, kanye namandla acindezelayo wodaka oluhlanganisiwe olomile.
3.2 Ukuhlaziywa kwemiphumela
Kungabonakala kusukela ngomphumela wemithamo ehlukene ye-hydroxypropyllylylylylt methylcellulose ether ekugcinweni kwamanzi, ukungaguquguquki, ukuqina okusobala, ukusetha isikhathi, kanye nokucindezela udaka ngodaka oluxubile. With the increase of cellulose ether content, the water retention rate of wet mortar is also gradually increasing, from 86.2% when hydroxypropyl methyl cellulose is not mixed, to 0.6% when hydroxypropyl methyl cellulose is mixed. Izinga lokugcinwa kwamanzi lifinyelela kuma-96.3%, afakazela ukuthi umphumela wokugcinwa kwamanzi wePropltyl cellulose ether muhle kakhulu; Ukuguquguquka okungaguquki kancane kancane kuncipha ngaphansi komphumela wokugcina amanzi wePropltyl Multuleose Ether (ukusetshenziswa kwamanzi ngethani ngalinye lodaka kuhlala kungashintshiwe ngesikhathi sokuhlolwa); Ubukhulu obubonakalayo bukhombisa ukuthambekela okungezansi, okukhombisa ukuthi umphumela wokugcinwa kwamanzi wePropltyl cellulose ether unyusa ivolumu yodaka olumanzi futhi wehlisa ubuntu; Isikhathi sokusetha kancane kancane ngokwanda kokuqukethwe kwe-hydroxypropyllylylylylylylylylylylylylylylylylylylylylyll methyl celtule Amandla acindezelayo angu-7D no-28D anciphe (makhulu umthamo, ukuncipha okusobala). Lokhu kuhlobene nokwanda kwevolumu yodaka kanye nokuncipha kobuningi obubonakalayo. Ukungezwa kwe-hydroxypropyllylylylylylylylyllyllose ether kungadala umgodi ovaliwe ngaphakathi kodaka olukhuni ngesikhathi sokuhlelwa kanye nokuqina kodaka. I-micropores ithuthukisa ukuqina kodaka.
I-4
1) Ukukhetha imikhiqizo ye-cellulose ether. Ngokuvamile, lapho kukhula khona i-viscosity ye-cellulose ether, okungcono ukuhola kwayo kwamanzi, kepha kukhuphuka okubonakalayo, kwehlisa i-solubelity yayo, okulimazayo ekusebenzeni nasekusebenzeni kodaka; Ubumsulwa be-cellulose ether buphansi ngodaka oluhlanganisiwe. Kuthiwa yi-FICH ukuthi, kube lula ukuncibilikisa. Ngaphansi komthamo ofanayo, ubuciko obuhle kakhulu, okungcono ukuthuthukiswa kwamanzi.
2) Ukukhetha umthamo we-cellulose ether. Ukusuka emiphumeleni yokuhlola kanye nokuhlaziywa komphumela wokuqukethwe kwe-cellulose ether ekusebenzeni kodaka oluhlanganisiwe oluhlanganisiwe, kungabonakala ukuthi kukhuphuka izindleko ze-cellulose ether, okungcono, kufanelekile, ukusebenza kwezici zokwakha kanye nezici ezine zendawo yokwakha ukuze ukhethe umthamo ofanele. The dosage of hydroxypropyl methyl cellulose ether in ordinary dry-mixed mortar is preferably 0.1 kg/t-0.3 kg/t, and the water retention effect cannot meet the standard requirements if the amount of hydroxypropyl methyl cellulose ether is added in a small amount. Ingozi esezingeni elifanele; Umthamo we-hydroxypropyllylylylylylylylylylyrlopyllyllose ether ngodaka olukhethekile lokuphamba olungamelana khona-ukuqhekeka lungama-3 kg / t.
3) Ukusetshenziswa kwe-cellulose ether ngodaka olulodwa oluhlanganisiwe. Esezinhlelweni zokulungiswa kodaka olujwayelekile oluhlanganisiwe, kungangezwa inani elifanelekile lokuhlanganiswa, okungcono ngokugcinwa kwamanzi kanye nomphumela wokuqina, ukuze kwakhiwe izindleko zokukhiqiza nge-cellulose ether, futhi zigcine izinsiza; Uma isetshenziswa yedwa nge-cellulose ether, amandla eBonding awakwazi ukufeza izidingo, nenani elifanele le-redisperiblex powder evuselelayo ye-latex. Ngenxa yenani eliphansi lokuhlanganiswa kodumo ngodaka, iphutha lokulinganisa likhulu lapho lisetshenziswa yedwa. Ikhwalithi yemikhiqizo yodaka eyomile.
5. Iziphetho neziphakamiso
1) Ku-worting osomile obomile oboshwe, ngokunyuka kokuqukethwe kwe-hydroxypropyllylylylylt methylcellulose ether, isilinganiso sokugcina amanzi singafinyelela kuma-96.3%, ukuguquguquka nokuqina kwenqubekela phambili. The compressive strength of 28d decreased, but the overall performance of dry-mixed mortar was improved when the content of hydroxypropyl methyl cellulose ether was moderate.
2) Esezinhlelweni zokulungiselela udaka olulodwa oluhlanganisiwe, i-cellulose ether enokubonakala okufanele nobunzima kufanele kukhethwe, futhi umthamo wawo kufanele uzimisele ngokuqinile ngokusebenzisa izivivinyo. Ngenxa yenani eliphansi lokuhlanganiswa kodumo ngodaka, iphutha lokulinganisa likhulu lapho lisetshenziswa yedwa. Kunconywa ukuyixuba nomthwali wokuqala, bese ukhulisa inani lesengezo ukuze uqinisekise ikhwalithi yemikhiqizo yodaka oluxutshwe.
3) Udaka oluhlanganisiwe olomile ngumkhakha osafufusa eChina. Enqubweni yokusebenzisa ama-madixtures kadaka, akumele siphishekele ubungako, kepha sinake kakhulu ikhwalithi futhi sinciphise ukusetshenziswa kwezindleko zokukhiqiza, sikhuthaze ukusetshenziswa kwezindawo zokunciphisa imfucuza, futhi sizuze ukulungiswa kwamandla nokusetshenziswa kwangempela.
Isikhathi sePosi: Feb-22-2023