Ukhonkolo ozihlanganisa ngokuzihlanganisa (i-SCC) ubuchwepheshe bakhonkolo banamuhla obugeleza ngaphansi kwesisindo salo ukuze bagcwalise amafomu ngaphandle kwesidingo sokudlidliza okwenziwe ngomshini. Izinzuzo zalo zifaka ukusebenza okuthuthukile, izindleko ezincishisiwe zabasebenzi, kanye nokusebenza okuthuthukile. Ukuthola lezi zici kudinga ukulawula okuqondile kwe-mix, imvamisa ngosizo lwama-admixtures afana ne-hydroxypropyllylylylyllose (HPMC). Le cellulose ether polymer idlala indima ebalulekile ekwenzeni izakhiwo ze-rheological ze-SCC, ithuthukise ukuqina kwayo kanye nezimpawu zokugeleza.
Izakhiwo nemisebenzi ye-HPMC
I-Hydroxypropyl Methylcellulose (HPMC) yi-nonic, i-polymer esolulekile yamanzi ethathwe ku-cellulose. Izakhiwo zayo ezibalulekile zifaka:
Ukuguqulwa kwe-VisCosity: I-HPMC inyusa ukubonakala kwezixazululo zamanzi, ukuthuthukisa uhlobo lwe-thixotropic lwe-conkcrete mix.
Ukugcinwa kwamanzi: Kunamakhono amahle kakhulu wokugcina amanzi, esiza ukugcina ukusebenziseka kokhonkolo ngokunciphisa ukuhwamuka kwamanzi.
Ukunamathelisa kanye nokuhlangana: I-HPMC ithuthukisa ubuhlobo phakathi kwezigaba ezahlukahlukene kukhonkolo, ithuthukise izakhiwo zayo zokubumbana.
Ukuthuthukiswa kokuqina: Kuqinisa ukumiswa kwezinhlanganisela ekuxubeni, ukunciphisa ukuhlukaniswa nokopha.
Lezi zakhiwo zenza i-HPMC ibe yisengezo esibalulekile ku-SCC, ngoba ibhekana nezinselelo ezijwayelekile njengokuhlukaniswa, ukopha kanye nokugcina ukugeleza okufiswayo ngaphandle kokuyekethisa ukuzinza.
Iqhaza le-HPMC kukhonkolo ozihlanganisa
1. Ukuthuthuka kokusebenza
Umsebenzi oyinhloko we-HPMC ku-SCC ukuthuthukisa ukusebenziseka kwawo ngokwandisa ukuqondiswa kokuhlanganiswa. Lokhu kuguqulwa kuvumela i-SCC ukuthi igeleke kalula ngaphansi kwesisindo sayo, ukugcwalisa amafomu ayinkimbinkimbi futhi ifinyelele isilinganiso esiphakeme sokusebenzisana ngaphandle kwesidingo sokudlidliza. I-HPMC iqinisekisa ukuthi ukhonkolo uhlala esebenza ngezikhathi ezeluliwe, okuzuzisa kakhulu ukuthulula okukhulu noma okuyinkimbinkimbi.
Ukugeleza: I-HPMC inikela nge-Mix's Thixotropic Properties, isivumela ukuba ihlale i-fluid lapho ixutshwe kepha ikhudlwana lapho imi khona. Lokhu kuziphatha kusekela izici zokuzivikela ze-SCC, kuqinisekiswa ukugeleza kahle ukugcwalisa isikhunta futhi kuvume imigoqo yokuqinisa amandla ngaphandle kokuhlukaniswa.
Ukungaguquguquki: Ngokulawula i-viscongiate, i-HPMC isiza ukugcina ukuvumelana okufanayo kuyo yonke inhlanganisela, ukuqinisekisa ukuthi i-batch ngayinye ye-SCC ibonisa ukusebenza okungaguquki ngokuya ngokugeleza nokuqina.
2. Ukuhlukaniswa kanye nokulawula ukopha
Ukuhlukaniswa (ukuhlukaniswa kwama-aggregates kusuka ku-Cement Paste) kanye nokopha (amanzi akhuphuka ebusweni) ukukhathazeka okukhulu kwi-SCC. Lezi zimo zingabeka phansi ubuqotho besakhiwo kanye nokuqedwa kwengaphezulu kokhonkolo.
I-homogeneous mix: Amandla we-HPMC okukhulisa ukubonana komakeshise usimende anciphise ukunyakaza kwamanzi kanye nama-aggregates, ngaleyo ndlela anciphise ubungozi bokuhlukaniswa.
Ukuncipha kokopha: Ngokugcina amanzi ngaphakathi kwe-mix, i-HPMC isiza ukuvikela ukopha. Lo mgcini wamanzi futhi uqinisekisa ukuthi inqubo ye-hydration iyaqhubeka ngempumelelo, ithuthukisa ukuthuthukiswa kwamandla nokuqina kokhonkolo.
3. Ukuqina okuthuthukile
I-HPMC inomthelela ekuqineni kwe-SCC ngokuthuthukisa ukuhlangana phakathi kwezinhlayiya in the mix. Lokhu kuqina okuthuthukisiwe kubalulekile ekugcineni ukusatshalaliswa okufanayo kokuhlanganiswa nokuvimbela ukwakheka kwezindawo ezingenayo noma izindawo ezibuthakathaka.
I-Cohesion: Isimo esinamathela esinamathela e-HPMC sikhuthaza ukubopha okungcono phakathi kwezinhlayiya zensimbi kanye nezinhlangothi, okuholela ekuxubeni okubumbanayo okuphikisana nokuhlukaniswa.
Ukuzinza: I-HPMC iqinisa ukusika kukakhonkolo, okuvumela ukusatshalaliswa kwezihlanganisi nokuvimbela ukwakheka kwe-laitance (isendlalelo esibuthakathaka sikasimende kanye nezinhlayiya ezinhle ebusweni).
Umphumela Ezakhiweni Zemishini
1. Amandla acindezelayo
Ithonya le-HPMC emandleni acindezelayo we-SCC ngokuvamile anehle. Ngokuvimbela ukuhlukaniswa kanye nokuqinisekisa ukuxubana okumnandi, i-HPMC isiza ukugcina ubuqotho be-miscrecture kakhonkolo, okuholela ezingomini ezingcono.
I-Hydration: Ukugcinwa kwamanzi okuthuthukisiwe kuqinisekisa i-hydration ephelele yezinhlayiya zosethu, okufaka isandla ekuthuthukisweni kwe-matrix enamandla.
Ubuningi obufanayo: Ukuvimbela ukuhlukaniswa kwezigaba kuphumela ekusatshalalisweni okufanayo kwezihlanganisi, okusekela amandla aphezulu acindezelwe futhi kunciphisa ubungozi bamaphoyinti abuthakathaka.
2. Ukuqina
Ukusetshenziswa kwe-HPMC ku-SCC kuthuthukisa ukuqina kwayo ngokuqinisekisa ukuthi i-microserous kanye ne-misscucture eningi.
Ukuncipha okuncishisiwe: Ukubumbana okuthuthukisiwe kanye nokuncipha kokopha kwehlisa ukuvumela kwethunkolo, okwenza ukumelana kwayo ezintweni zemvelo njengemijikelezo yezemvelo efana nemijikelezo yeqhwa, ukuhlasela kwamakhemikhali, kanye ne-carbonation.
Ukuqedwa kwendawo okuthuthukile: Ukuvimbela ukopha kanye nokwehlukaniswa kwe-segriting kuqinisekisa ukuqedwa komhlaba okubushelelezi futhi okuhlala isikhathi eside, okuthambekele kakhulu ekuqhekekeni nasekulinganiseni.
Ukucatshangelwa kwesicelo kanye komthamo
Ukusebenza kwe-HPMC ku-SCC kuncike kumthamo wayo kanye nezidingo ezithile zokuhlanganiswa. Amanani we-DOSAGE ejwayelekile aqala kusuka ku-0,1% kuya ku-0,5% wesisindo sosimende, kuya ngezakhiwo ezifiselekayo kanye nezimpawu zezinye izakhi ezixube.
Mix Design: Idizayini ecophelela yokuxuba ibalulekile ukuze wenze ngcono izinzuzo ze-HPMC. Izici ezifana nohlobo oluhlanganisiwe, okuqukethwe kosimende, kanye nezinye ama-admadix kufanele kubhekwe ukuze kufinyelelwe ebhalansi oyifunayo yokusebenza, ukuqina namandla.
Ukuvumelana: I-HPMC kumele ihambisane namanye ama-admixtures asetshenziswe ku -xube, njengama-superplastimizer nama-subvucers amanzi, ukugwema ukusebenzisana okubi okungabeka engcupheni ukusebenza kwe-SCC.
IHydroxypropyl Methylcellulose (HPMC) idlala indima ebalulekile ekuthuthukiseni ukusebenza kokhonkolo ozihlanganisa kahle (i-SCC). Amandla alo okuguqula ukubonwa, ukuthuthukisa ukugcinwa kwamanzi, futhi aqinise ukuxubana amakheli ezinselelo ezibalulekile ekukhiqizeni i-SCC, kufaka phakathi ukuhlukaniswa, ukopha kanye nokugcina ukugeleza. Ukufakwa kwe-HPMC ku-SCC kuphumela ekuhlanganisweni kokhonkolo okusebenzisekayo, okuzinzile, nokuqinile, okwenza kube yisengezo esibalulekile kwizicelo zesimanje zokhonkolo. Umthamo ofanele kanye nomklamo wokuxuba ubalulekile ukuze uhlanganise izinzuzo ezigcwele ze-HPMC, uqinisekise ukuthi i-SCC ihlangabezana nezindlela ezithile zokusebenza ezidingekayo kumaphrojekthi wokwakha ahlukahlukene.
Isikhathi Sokuthumela: Jun-18-2024