1. Ukushisa kwe-hydration
Ngokusho kwe-Reject Curve yokushisa kwe-hydration ngokuhamba kwesikhathi, inqubo ye-hydration ye-hydred ihlukaniswe izigaba ezinhlanu, isikhathi sokushisa (i-15min ~ 4h), nesikhathi sokuqina (1d ~ 28d).
Imiphumela yokuhlola ikhombisa ukuthi ekuqaleni kokungeniswa (okungukuthi, isikhathi sokuqala se-hydration), lapho inani le-hemc lingu-0,1% uma liqhathaniswa ne-slurry elingenalutho, inani eliphakeme le-slurry lithuthukile kanti inani eliphakeme likhuphuke kakhulu. Lapho inani leIpikilikukhuphuka lapho kungaphezulu kwe-0,3%, inani lokuqala eliphakeme le-slurry libambezelekile, futhi inani eliphakeme kancane kancane liyancipha ngokwanda kokuqukethwe kwe-hemc; Ngokusobala uzolibalisa isikhathi sokungeniswa kanye nesikhathi sokusheshisa isikhathi se-slurry kasimende, futhi okukhulu okuqukethwe, isikhathi eside ukungeniswa, isikhathi sokusheshisa, kanye nobukhulu be-expothermic; Ukushintshwa kwe-cellulose ether okuqukethwe akunamphumela osobala ngobude besikhathi sokukhohlisa kanye nesikhathi sokuzinza sikakhonkolo kungaphezulu kwamahora angama-36, kuboniswa okuqukethwe kwe-hydration kungaphansi kwamahora angama-36, ukuguqulwa kwe-cellulose ether kungaphezulu kokushisa kwe-hydration, okufana nesibalo 3 (b).
I-Fig.3 Ukuguquguquka kokuguqulwa kwesilinganiso sokukhishwa kwesilo se-hydration
2. MIzakhiwo ezi-eChanical:
Ngokutadisha izinhlobo ezimbili ze-cellulose izithatheketha ezine-viscosities ezingama-60000parities kanye ne-100000pa Amandla acindezelayo owesimende oguquliwe oxutshwe ne-100000pasity Hydroxyproselll methylyullll methyllulopropyllylylylylylylylyl methyllulopyllylylylylylylylylyl methyllulopyllylyl methyllulooser methylluloselylylyl methyllulosellylyl methylluloose methyllulosel ther inyuka kuqala bese inciphisa ngokwanda kokuqukethwe kwayo (njengoba kukhonjisiwe kuMfanekiso 4). Kubonisa ukuthi ukufakwa kwe-methyl cellulose ether kuzonciphisa kakhulu amandla acindezelayo kasimende kasimende. Lapho inani lithe xaxa, lincane amandla azoba; Uma kuncane ukubonwa, kuba mphumela omkhulu ekulahlekelweni amandla okucindezela ngodaka; I-Hydroxypropylylylylylylylylylylylllllliose ether lapho umthamo ungaphansi kuka-0,1%, amandla acindezelwe owesimende angakhuphuka ngendlela efanele. Lapho umthamo ungaphezulu kuka-0,1%, amandla acindezelayo odaka azokwehla ngokunyuka komthamo, ngakho-ke umthamo kufanele ulawulwe ku-0,1%.
I-Fig.4 3D, 7D kanye nama-28d amandla acindezelayo e-MC1, MC2 ne-MC3 Modimed Cement Botar
(Methyl cellulose ether, i-viscocity 60000pawu, ngemuva kokuthi i-MC1; i-methyl cellulose ether, i-visdroxyprose methylzulose, ukubhekisisa i-MC2; i-viscoxyprop methypaliseOse, ukubhejwa kwe-100000PAS, okubhekiswe ku-MC3).
3. Cisikhathi sokulala:
Ngokukala isikhathi sokusetha kwe-hydroxypropyllylylylyllose ether nge-viscosity ye-100000pasic dovages ye-HPMC yokunamathisela, isikhathi sokugcina nesikhathi sokugcina sikasimende waqhubeka isikhathi eside. Lapho okuhlushwa kungu-1%, isikhathi sokuqala sokusetha sifinyelela imizuzu engama-510, futhi isikhathi sokugcina sokufika sifinyelela imizuzu engama-850. Uma kuqhathaniswa nesampula elingenalutho, isikhathi sokuqala sokusetha sinwetshwa ngemizuzu engama-210, futhi isikhathi sokugcina sokugcina sinwetshwa ngemizuzu engama-470 (njengoba kukhonjisiwe kuMfanekiso 5). Noma ngabe yi-HPMC enokubonakala kwe-50000pa S, i-100000pa S, ingabambezela ukusetha kuka usimende, kepha uma iqhathaniswa nokuthambisa kukakhonkolo, isikhathi sokugcina nesikhathi sokugcina isondele ngokuvuselelwa kwe-viscosity, njengoba kukhonjisiwe kuMfanekiso 6 kukhonjisiwe. Lokhu kungenxa yokuthi i-cellulose ether yi-adderbed ebusweni bezinhlayiya zokwenza usimende, okuvimbela amanzi ekuxhumaneni nezinhlayiya zokwenza usimende, ngaleyo ndlela kubambezele i-hydrate ka usimende. Lapho kukhula i-viscosity ye-cellulose ether, ubukhulu be-adsorption ungqimba ngaphezulu kwezinhlayiya zensimbi, kanye nomphumela obaluleke kakhulu wokubuyisa.
Umkhimo we-Fig.5 we-cellulose ether okuqukethwe ekubekeni isikhathi sodaka
Umphumela we-Fig.6 we-viscosities ahlukene ye-HPMC ngesikhathi sokusetha sikakhokho kasimende
(MC-5 (50000pa · s), MC-10 (100000pa nye) kanye ne-MC-20 (200000pa nye)
I-methyl cellulose ether ne-hydroxypropyll methyl cellulose ether izokwandisa kakhulu isikhathi sokushisa usimende, futhi sixazulule inkinga yamandla aphansi kanye ne-tile slurry ephansi ngemuva kokuqina. inkinga yokuqhekeka.
4. Ukugcinwa kwamanzi:
Umphumela wokuqukethwe kwe-cellulose ether ekugcinweni kwamanzi wafundwa. Kutholakale ukuthi ngokwanda kokuqukethwe kwe-cellulose ether, izinga lokugcinwa kwamanzi liyanyuka, futhi lapho okuqukethwe kwe-cellulose ether kukhulu kune-0.6%, izinga lokugcina amanzi livame ukubanzile. However, when comparing three kinds of cellulose ethers (HPMC with a viscosity of 50000Pa s (MC-5), 100000Pa s (MC-10) and 200000Pa s (MC-20)), the influence of viscosity on water retention is different. Ubudlelwano phakathi kwezinga lokugcina amanzi yile: MC-5.
Isikhathi Seposi: APR-28-2024