I-Cellulose Ether kanye ne-Starch Ether Ezimpahleni Zodaka Oluxubile Elomile

Amanani ahlukene e-cellulose ether kanye ne-starch ether ahlanganiswa odaka oluxutshwe okomile, futhi ukungaguquguquki, ukuminyana okusobala, amandla okucindezela kanye namandla okubopha odaka kwacwaningwa ngokuhlolwa. Imiphumela ibonisa ukuthi i-cellulose ether ne-starch ether ingathuthukisa kakhulu ukusebenza kwe-mortar, futhi uma isetshenziswa esilinganisweni esifanele, ukusebenza okuphelele kodaka kuzoba ngcono.

Amagama angukhiye: i-cellulose ether; isitashi se-ether; udaka oluxutshwe owomile

Udaka lwendabuko lunobubi bokopha kalula, ukuqhekeka, namandla aphansi. Akulula ukuhlangabezana nezidingo zekhwalithi zekhwalithi ephezulu, futhi kulula ukubangela umsindo nokungcoliswa kwemvelo ngesikhathi sokukhiqiza. Ngokuthuthukiswa kwezidingo zabantu zokwakha ikhwalithi kanye nendawo ezungezile, udaka oluxutshwe okomile olusebenza kangcono kakhulu lusetshenziswe kabanzi. Udaka oluxutshwe okomile, okwaziwa nangokuthi udaka oluxutshwe okomile, umkhiqizo osuphelile oxutshwa ngokufanayo nezinto zikasimende, ama-aggregate amahle, kanye nezixube ngesilinganiso esithile. Iyiswa endaweni yokwakha ngezikhwama noma ngobuningi bayo ukuxutshwa namanzi.

I-Cellulose ether ne-starch ether yizixube ezimbili ezivame kakhulu zodaka lwesakhiwo. I-Cellulose ether iyiyunithi yesakhiwo esiyisisekelo se-anhydroglucose etholakala ku-cellulose yemvelo ngokusabela kwe-etherification. Yimpahla ye-polymer encibilika emanzini futhi ngokuvamile isebenza njengesithambiso odakeni. Ngaphezu kwalokho, kunganciphisa inani lokungaguquguquki kodaka, kuthuthukise ukusebenza kodaka, kukhuphule izinga lokugcinwa kwamanzi odaka, futhi kunciphise amathuba okuqhekeka kokumbozwa kodaka. I-starch ether iyi-ether ebambele isitashi eyakhiwe ukusabela kwamaqembu e-hydroxyl kuma-molecule esitashi anezinto ezisebenzayo. Inekhono elihle kakhulu lokujiya ngokushesha, futhi umthamo ophansi kakhulu ungafinyelela imiphumela emihle. Ivamise ukuxutshwa ne-cellulose odakeni lokwakha Sebenzisa nge-ether.

1. Isivivinyo

1.1 Izinto ezisetshenziswayo

Usimende: Ishii P·O42.5R usimende, ukusetshenziswa kwamanzi okungaguquguquki 26.6%.

Isihlabathi: isihlabathi esimaphakathi, i-fineness modulus 2.7.

I-Cellulose ether: i-hydroxypropyl methylcellulose ether (HPMC), i-viscosity 90000MPa·s (2% isixazululo esinamanzi, 20°C), inikezwe ngabakwaShandong Yiteng New Material Co., Ltd.

I-starch ether: i-hydroxypropyl starch ether (HPS), ihlinzekwa yi-Guangzhou Moke Building Materials Technology Co., Ltd.

Amanzi: amanzi ampompi.

1.2 Indlela yokuhlola

Ngokwezindlela ezibalulwe kokuthi “Amazinga Ezindlela Zokuhlola Ukusebenza Okuyisisekelo Kodaka Lokwakha” JGJ/T70 kanye “Nezimiso Zobuchwepheshe Zokufaka Udaka” JGJ/T220, ukulungiswa kwamasampula kanye nokutholwa kwemingcele yokusebenza kuyenziwa.

Kulesi sivivinyo, ukusetshenziswa kwamanzi kwe-benchmark mortar DP-M15 kunqunywa ngokuvumelana kwe-98mm, futhi isilinganiso sodaka siyisimende: isihlabathi: amanzi = 1: 4: 0.8. Umthamo we-cellulose ether odakeni ngu-0-0.6%, kanti umthamo we-starch ether ngu-0-0.07%. Ngokushintsha umthamo we-cellulose ether kanye ne-starch ether, kutholakala ukuthi ukuguqulwa komthamo we-admixture kunomphumela odongeni. umthelela ekusebenzeni okuhlobene. Okuqukethwe kwe-cellulose ether ne-starch ether kubalwa njengephesenti lesisindo sikasimende.

2. Imiphumela yokuhlolwa nokuhlaziya

2.1 Imiphumela yokuhlolwa nokuhlaziywa kwe-single-doped admixture

Ngokusho kwesilinganiso sohlelo lokuhlola olushiwo ngenhla, ukuhlolwa kwenziwa, futhi umphumela we-admixture exutshwe okukodwa ekuhambisaneni, ukuminyana okubonakalayo, amandla okucindezela kanye namandla okubopha kodaka oluxutshwe owomile kwatholakala.

Ukuhlaziya imiphumela yokuhlolwa kwezingxube zokuxuba okukodwa, kungabonakala ukuthi lapho isitashi se-ether sixutshwa sodwa, ukuvumelana kodaka kuncipha ngokuqhubekayo uma kuqhathaniswa nodaka lokulinganiswa nokwenyuka kwenani le-starch ether, kanye nokuminyana okusobala kwe-starch ether. udaka luzokhula ngokunyuka kwenani. Ukuncipha, kodwa kuhlale kukhulu kunodaka olubonakalayo lokuminyana, amandla okucindezela udaka 3d kanye nama-28d azoqhubeka ehla, futhi njalo angaphansi kwamandla okucindezela odaka lokulinganiswa, kanye nenkomba yamandla okubopha, ngokwengezwa kwesitashi ether, i amandla ebhondi aqala akhuphuke bese ehla, futhi ahlala emakhulu kunevelu yodaka lwebhentshimakhi. Lapho i-cellulose ether ixutshwa ne-cellulose ether kuphela, njengoba inani le-cellulose ether likhuphuka lisuka ku-0 liye ku-0.6%, ukuvumelana kodaka kuncipha ngokuqhubekayo uma kuqhathaniswa nodaka lwereferensi, kodwa alukho ngaphansi kuka-90mm, okuqinisekisa ukwakhiwa okuhle udaka, nobuningi obubonakalayo bunayo Ngesikhathi esifanayo, amandla okucindezela we-3d no-28d aphansi kunalawo odaka lwereferensi, futhi ayancipha ngokuqhubekayo ngokunyuka komthamo, kuyilapho amandla okubopha ethuthuka kakhulu. Uma umthamo we-cellulose ether ungu-0.4% , amandla okubopha udaka makhulu, cishe aphindwe kabili amandla okubopha osimende bebhentshimakhi.

2.2 Imiphumela yokuhlolwa kwengxube exubile

Ngokwesilinganiso senhlanganisela yomklamo esilinganisweni se-admixture, isampula yodaka lwengxube exubile yalungiswa futhi yahlolwa, futhi imiphumela yokungaguquguquki kodaka, ukuminyana okusobala, amandla okucindezela namandla okubopha kwatholakala.

2.2.1 Umthelela wengxube ehlanganisiwe ekuhambisaneni kodaka

Ijika lokungaguquguquki litholakala ngokuya ngemiphumela yokuhlolwa kwezingxube ezihlanganisiwe. Kungabonakala kulokhu ukuthi lapho inani le-cellulose ether liyi-0.2% kuya ku-0.6%, futhi inani le-starch ether liyi-0.03% kuya ku-0.07%, lezi ezimbili zixubene nodaka Ekugcineni, ngenkathi kugcinwa inani elilodwa. we-admixtures, ukwandisa inani lezinye izingxube kuzoholela ekunciphiseni ukuvumelana kodaka. Njengoba i-cellulose ether kanye nezinhlaka ze-starch ether ziqukethe amaqembu e-hydroxyl nezibopho ze-ether, ama-athomu e-hydrogen kulawa maqembu kanye nama-molecule wamanzi amahhala akule ngxube angakha izibopho ze-hydrogen, ukuze amanzi aboshwe engeziwe avele odakeni futhi anciphise ukugeleza kodaka. , okubangela inani lokungaguquguquki kodaka kancane kancane.

2.2.2 Umthelela wokuhlanganisa ingxube kubuningi obubonakalayo bodaka

Lapho i-cellulose ether ne-starch ether kuhlanganiswa odakeni ngesilinganiso esithile, ukuminyana okusobala kodaka kuzoshintsha. Kungabonakala emiphumeleni yokuthi ukuxutshwa kwe-cellulose ether ne-starch ether esikalini esiklanyelwe Ngemva kodaka, ukuminyana okusobala kodaka kuhlala ku-1750kg/m.³, kuyilapho ukuminyana okubonakalayo kodaka lwereferensi kungu-2110kg/m³, futhi ukuhlanganiswa kwakho kokubili odakeni kwenza ukuminyana okubonakalayo kwehle cishe ngo-17%. Kungabonakala ukuthi ukuhlanganisa i-cellulose ether ne-starch ether kunganciphisa ngempumelelo ukuminyana okusobala kodaka futhi kwenze udaka lube lula. Lokhu kungenxa yokuthi i-cellulose ether kanye ne-starch ether, njengemikhiqizo ye-etherification, ziyizixube ezinomphumela oqinile wokungenisa umoya. Ukwengeza lezi zingxube ezimbili odakeni kunganciphisa kakhulu ukuminyana okusobala kodaka.

2.2.3 Umthelela wengxube exubile emandleni okucindezela odaka

I-3d kanye ne-28d yamajika amandla acindezelayo odaka atholakala emiphumeleni yokuhlolwa kodaka. Amandla acindezelayo e-benchmark mortar 3d kanye ne-28d yi-15.4MPa kanye ne-22.0MPa, ngokulandelana, futhi ngemva kokuthi i-cellulose ether ne-starch ether ehlanganiswe odakeni, amandla okucindezela odaka 3d no-28d angu-12.8MPa no-19.3MP ngokulandelanayo, ngokulandelana, ziphansi kunalezo ezingenazo zombili. I-benchmark mortar ene-admixture. Kusukela ethonyeni lezixube ezihlanganisiwe emandleni okucindezela, kungabonakala ukuthi kungakhathaliseki ukuthi isikhathi sokuphulukisa siyi-3d noma i-28d, amandla okucindezela odaka ayancipha ngokunyuka kwenani elihlanganisiwe le-cellulose ether ne-starch ether. Lokhu kungenxa yokuthi ngemva kokuxutshwa kwe-cellulose ether nesitashi ether, izinhlayiya ze-latex zizokwakha ungqimba oluncane lwe-polymer engangeni manzi nosimende, okuvimbela ukugeleza kukasimende futhi kunciphise amandla okucindezela odaka.

2.2.4 Umthelela wengxube exubile kumandla ebhondi yodaka

Ingabonakala ethonyeni le-cellulose ether ne-starch ether emandleni okunamathela odaka ngemva kokuba umthamo oklanyiwe uhlanganiswe futhi uxutshwe nodaka. Lapho umthamo we-cellulose ether ungu-0.2% ~ 0.6%, umthamo wesitashi ether ngu-0.03%~0.07% %, ngemva kokuba okubili kuhlanganiswe odakeni, ngokwanda kwenani lalokhu okubili, amandla okubopha udaka luzokhula kancane kancane kuqala, futhi ngemva kokufinyelela inani elithile, ngokwanda kwenani lokuhlanganisa, amandla okunamathela odaka azokhula kancane kancane. Amandla okubopha azokwehla kancane kancane, kodwa asemakhulu kunevelu yamandla okubopha osimende bebhentshimakhi. Lapho kuhlanganiswa ne-0.4% ye-cellulose ether kanye ne-0.05% ye-starch ether, amandla okubopha osimende afinyelela isilinganiso esiphezulu, esingaba izikhathi ezingu-1.5 ngaphezu kwe-benchmark mortar. Kodwa-ke, lapho isilinganiso sidlula, hhayi kuphela i-viscosity yodaka inkulu kakhulu, ukwakhiwa kunzima, kodwa futhi amandla okubopha odaka ayancipha.

3. Isiphetho

(1) Kokubili i-cellulose ether ne-starch ether kunganciphisa ngokuphawulekayo ukuvumelana kodaka, futhi umphumela uyoba ngcono lapho kokubili kusetshenziswa ndawonye ngenani elithile.

⑵Ngenxa yokuthi umkhiqizo we-etherification unomsebenzi oqinile wokungenisa umoya, ngemva kokwengeza i-cellulose ether ne-starch ether, kuzoba negesi eningi ngaphakathi kodaka, ukuze ngemva kokwengeza i-cellulose ether ne-starch ether, indawo emanzi yodaka iyoba Ukuminyana okubonakalayo kuyoba. kuncishiswe kakhulu, okuzoholela ekunciphiseni okuhambisanayo kwamandla okucindezela odaka.

(3) Inani elithile le-cellulose ether ne-starch ether lingathuthukisa amandla okubopha odaka, futhi lapho kokubili kusetshenziswa ukuhlanganiswa, umphumela wokuthuthukisa amandla okubopha odaka ubaluleke kakhulu. Lapho kuhlanganiswa i-cellulose ether ne-starch ether, kuyadingeka ukuqinisekisa ukuthi inani elihlanganisiwe lifanelekile. Inani elikhulu kakhulu alichithi nje izinto zokwakha, kodwa futhi linciphisa amandla okubopha odaka.

(4) I-cellulose ether ne-starch ether, njengezingxube zodaka ezivame ukusetshenziswa, zingashintsha ngokuphawulekayo izici ezifanele zodaka, ikakhulukazi ekuthuthukiseni ukungaguquguquki kodaka namandla okubopha, futhi zinikeze ireferensi yokukhiqiza ngokulinganayo kwezingxube zodaka oluhlanganisiwe ezomile .