Ama-cellulose ethers ku-wall putty

I-Cellulose ether (i-hydroxypropyl methylcellulose, i-HPMC ngamafuphi) iyingxube evamile yokwakha i-putty yangaphakathi yodonga futhi idlala indima ebalulekile ku-putty. I-HPMC ene-viscosities ehlukene inethonya elikhulu ekusebenzeni kwe-putty. Leli phepha lihlola ngokuhlelekile imiphumela nemithetho yama-viscosities ahlukene e-HPMC kanye imithamo yayo ekusebenzeni kwe-putty, futhi linquma i-viscosity ephezulu kanye nesilinganiso se-HPMC ku-putty.

Amagama angukhiye: i-cellulose ether, i-viscosity, i-putty, ukusebenza

0.Isandulelo

Ngokuthuthuka komphakathi, abantu baya ngokuya belangazelela ukuhlala endaweni enhle yasendlini. Enkambweni yokuhlobisa, izindawo ezinkulu zezindonga zidinga ukuchithwa futhi zibekwe nge-putty ukuze zigcwalise izimbobo. I-Putty iyimpahla yokuhlobisa ebaluleke kakhulu. Ukwelashwa okungalungile kwe-putty kuzodala izinkinga ezifana nokuqhekeka nokuxebuka kwe-coating kapende. Ukusebenzisa imfucuza yezimboni kanye namaminerali anezimbotshana ezinezakhiwo zokuhlanza umoya ukuze kufundwe i-putty yesakhiwo esisha sokuvikela imvelo sekuyisihloko esishisayo. IHydroxypropyl methyl cellulose (Hydroxypropyl methyl cellulose, isifinyezo sesiNgisi sithi HPMC) iwuketshezi lwe-polymer encibilika emanzini, njengengxube evame ukusetshenziswa kakhulu yokwakha i-putty, inokusebenza okuhle kokugcina amanzi, yandisa isikhathi sokusebenza futhi ithuthukisa ukusebenza kahle kokwakhiwa, Ithuthukisa ukusebenza kahle komsebenzi. . Ngokusekelwe ocwaningweni lwangaphambilini lokuhlola, leli phepha lilungise uhlobo lwe-putty yokuvikela imvelo odongeni lwangaphakathi olune-diatomite njengesihlungi esisebenzayo esiyinhloko, futhi lafunda ngokuhlelekile imiphumela ye-viscosity ehlukene ye-HPMC kanye nenani le-putty ekuphikisweni kwamanzi we-putty, amandla okubopha, okokuqala. ukomisa ukumelana nokuqhekeka, ukugaya Umthelela wokusebenza, ukusebenza kanye nesikhathi esomile sangaphezulu.

1. Ingxenye yokuhlola

1.1 Hlola izinto zokusetshenziswa namathuluzi

1.1.1 Izinto ezisetshenziswayo

I-4 W-I-HPMC, 10 W-I-HPMC, kanye ne-20 W-I-HPMC cellulose ether kanye ne-polyvinyl alcohol rubber powder esetshenziswe ekuhlolweni inikezwe i-Kima Chemical Co., Ltd; i-diatomite yanikezwa yi-Jilin Diatomite Company; i-calcium enzima kanye ne-talcum powder Ihlinzekwa yi-Shenyang SF Industrial Group; U-32.5 R usimende omhlophe wasePortland uhlinzekwe yi-Yatai Cement Company.

1.1.2 Impahla yokuhlola

isihloli se-fluidity sikasimende i-NLD-3; umhloli wokuqala wokumisa ukulwa nokuqhekeka i-BGD 597; umhloli wamandla ebhondi ehlakaniphile HC-6000 C; ukuxuba kanye nesihlabathi sokuhlakaza umshini wezinhloso eziningi i-BGD 750.

1.2 Indlela yokuhlola

Ifomula eyisisekelo yokuhlolwa, okungukuthi, okuqukethwe usimende, i-calcium esindayo, i-diatomite, i-talcum powder kanye ne-polyvinyl alcohol ingama-40%, 20%, 30%, 6% no-4% yenani eliphelele le-putty powder, ngokulandelana. . Imithamo ye-HPMC enama-viscosities amathathu ahlukene ingu-1‰, 2‰, 3‰, 4‰futhi 5‰ngokulandelana. Ukuze kube lula ukuqhathanisa, ubukhulu bokwakhiwa kwe-putty single-pass kulawulwa ku-2 mm, futhi izinga lokunwetshwa lilawulwa ku-170 mm kuya ku-180 mm. Izinkomba zokubona ukuqala kokumelana nokuqhekeka komile, amandla ebhondi, ukumelana namanzi, indawo yokusandeni, ukusebenza kanye nesikhathi esomile sangaphezulu.

2. Imiphumela yokuhlolwa nengxoxo

2.1 Imithelela ye-viscosities ehlukene ye-HPMC kanye nomthamo wayo emandleni ebhondi ye-putty

Kusukela kumiphumela yokuhlolwa kanye namajika amandla ebhondi ama-viscosities ahlukene we-HPMC nokuqukethwe kwawo ku-putty's amandla isibopho, kungabonakala ukuthi putty'Amandla ebhondi akhuphuka kuqala bese ehla ngokunyuka kokuqukethwe kwe-HPMC. Amandla ebhondi ye-putty anethonya elikhulu, elikhuphuka lisuka ku-0.39 MPa lapho okuqukethwe kungu-1‰ukuya ku-0.48 MPa lapho okuqukethwe kungu-3‰. Lokhu kungenxa yokuthi lapho i-HPMC ihlakazeka emanzini, i-cellulose ether emanzini ikhukhumala ngokushesha futhi ixubane nempushana yerabha, ihlanganiswe nomunye nomunye, futhi umkhiqizo we-cement hydration uzungezwe le filimu ye-polymer ukuze wenze isigaba se-matrix esiyinhlanganisela, okwenza ibhondi ye-putty Amandla ayanda, kodwa uma inani le-HPMC likhulu kakhulu noma i-viscosity iphezulu kakhulu noma iphansi kakhulu, ifilimu ye-polymer eyakhiwe phakathi kwe-HPMC nezinhlayiya zikasimende inomphumela wokuvala, okunciphisa amandla esibopho se-putty.

2.2 Imithelela ye-viscosities ehlukene ye-HPMC nokuqukethwe kwayo ngesikhathi esomile se-putty

Ingabonwa emiphumeleni yokuhlolwa yama-viscosities ahlukene e-HPMC kanye nomthamo wayo ngesikhathi sokumisa phezulu kwe-putty kanye nejika lesikhathi lokomisa phezulu. Uma kukhulu i-viscosity ye-HPMC kanye nomthamo omkhulu, isikhathi sokumisa phezulu kwe-putty siba side. /T298-2010), isikhathi esomile esingaphezulu kodonga lwangaphakathi lwe-putty akufanele sidlule amaminithi angu-120, futhi lapho okuqukethwe kwe-10 W-I-HPMC idlula oku-4‰, kanye nokuqukethwe kuka-20 W-I-HPMC idlula oku-3‰, isikhathi esomile esingaphezulu se-putty sidlula izidingo zokucaciswa. Lokhu kungenxa yokuthi i-HPMC inomphumela omuhle wokugcina amanzi. Uma i-HPMC ixutshwa ku-putty, ama-molecule amanzi kanye namaqembu e-hydrophilic esakhiweni samangqamuzana e-HPMC angahlangana namanye ukuze ethule amabhamuza amancane. Lawa ma-bubbles anomphumela "we-roller", okuzuzisa i-putty batching Ngemva kokuba i-putty iqiniswe, amanye ama-bubbles omoya asekhona ukuze enze izimbotshana ezizimele, okuvimbela amanzi ukuba ahwamuke ngokushesha futhi andise isikhathi sokumisa ebusweni be-putty. Futhi lapho i-HPMC ixutshwa ku-putty, imikhiqizo ye-hydration efana ne-calcium hydroxide nejeli ye-CSH kusimende ikhangiswa ngama-molecule e-HPMC, okwandisa i-viscosity yesisombululo se-pore, kunciphisa ukunyakaza kwama-ion kusixazululo se-pore, kanye nokubambezeleka okuqhubekayo. inqubo usimende hydration.

2.3 Imithelela ye-viscosities ehlukene ye-HPMC kanye nomthamo wayo kwezinye izakhiwo ze-putty

Kungabonakala emiphumeleni yokuhlolwa yethonya lama-viscosities ahlukene we-HPMC kanye nenani le-putty kwezinye izakhiwo ze-putty. Ukwengezwa kwe-HPMC enama-viscosity ahlukene kwenza ukumelana kokuqala kokumiswa komile, ukumelana namanzi nokusebenza kwesihlabathi se-putty konke okuvamile, kodwa ngokwanda kwenani le-HPMC , ukusebenza kabi kokwakhiwa. Ngenxa yokuqina komphumela we-HPMC, okuqukethwe okuningi kuzokhuphula ukungaguquguquki kwe-putty, okuzokwenza kube nzima ukukhuhla i-putty futhi kubangele ukusebenza kokwakhiwa.

3. Isiphetho

(1) Amandla ahlangene we-putty akhuphuka kuqala bese ehla ngokunyuka kokuqukethwe kwe-HPMC, futhi amandla ahlangene we-putty athinteka kakhulu lapho okuqukethwe kwe-10 W-HPMC kungu-3‰.

(2) Uma kukhulu i-viscosity ye-HPMC kanye nokuqukethwe okwengeziwe, isikhathi sokoma kwe-putty siba side. Uma okuqukethwe kwe-10 W-HPMC kudlula 4‰, futhi okuqukethwe okungu-20 W-HPMC kudlula oku-3‰, isikhathi sokumisa i-putty side kakhulu futhi asihlangabezani nezinga. Dinga.

(3) Ukwengeza ama-viscosity ahlukene we-HPMC kwenza ukumelana nokuqhekeka kokumiswa kokuqala, ukumelana namanzi nokusebenza kwesihlabathi kwe-putty evamile, kodwa ngokwanda kokuqukethwe kwayo, ukusebenza kokwakhiwa kuba kubi kakhulu. Uma kucatshangelwa kabanzi, ukusebenza kwe-putty kuhlanganiswe no-3‰I-10 W-HPMC ihamba phambili.