1. Kulaylka fuuqbaxa
Marka loo eego qalooca sii daayo kulaylka fuuqbaxa waqti ka dib, habka fuuqbaxa ee sibidhka waxaa sida caadiga ah loo qaybiyaa shan marxaladood, kuwaas oo kala ah, xilliga fuuqbaxa bilowga ah (0 ~ 15min), xilliga induction (15min ~ 4h), dedejinta iyo dejinta muddada (4h ~ 8h), deceleration iyo muddada adag (8h ~ 24h), iyo muddada daaweynta (1d ~ 24h).
Natiijooyinka imtixaanku waxay muujinayaan in marxaladda hore ee kicinta (ie, xilliga fuuq-baxa bilowga ah), marka xaddiga HEMC uu yahay 0.1% marka la barbar dhigo shamiitada maran, heerka ugu sarreeya ee slurry-ka ayaa horumarsan oo ugu sarreeya ayaa si weyn u kordhay. Marka qadarkaHEMCwaxay kordhisaa Marka ay ka sarreyso 0.3%, heerka ugu sarreeya ee exothermic ee qulqulka ayaa dib u dhigaya, qiimaha ugu sarreeyana wuxuu si tartiib tartiib ah hoos ugu dhacayaa kororka maadada HEMC; HEMC waxay si cad dib u dhigi doontaa muddada soo-gelinta iyo muddada dardargelinta ee dareeraha sibidhka, iyo ka sii weynaanta waxa ku jira, muddada dheer ee soo-gelinta, dib-u-dhaca muddada dardargelinta, iyo yaraanta heerka ugu sarreeya ee exothermic; isbeddelka maadada ether cellulose ma laha saameyn muuqata oo ku saabsan dhererka muddada hoos u dhaca iyo muddada xasilloonida ee dareeraha sibidhka, sida ku cad Jaantuska 3 (a) Waxaa lagu muujiyay in ether cellulose ay sidoo kale yareyn karto kulaylka fuuq-celinta ee koollada sibidhka 72 saacadood gudahood, laakiin marka kulaylka fuuqbaxa uu ka dheer yahay saacadaha 36, isbeddelka kuleylku wuxuu leeyahay saameyn yar oo kuleyl ah. Jaantuska 3(b).
Jaantuska.3 Isbedelka fuuqbaxa heerka sii daynta kulaylka fuuqbaxa ee koollada sibidhka oo ay ku jiraan waxyaabo kala duwan oo ether cellulose ah (HEMC)
2. Mguryaha echanical：
Marka la baranayo laba nooc oo ethers cellulose ah oo leh viscosities of 60000Pa·s iyo 100000Pa·s, waxaa la ogaaday in xoogga cadaadiska ah ee hoobiye la beddelay ee lagu daray methyl cellulose ether ay si tartiib tartiib ah hoos ugu dhacday kororka nuxurkiisa. Xoogga cufan ee hoobiyeyaasha wax laga beddelay ee lagu qasay 100000Pa·s viscosity hydroxypropyl methyl cellulose ether ayaa kor u kaca marka hore ka dibna hoos u dhaca korodhka nuxurkiisa (sida ku cad sawirka 4). Waxay muujineysaa in isku darka methyl cellulose ether ay si weyn u dhimi doonto xoogga cadaadiska ee hoobiye sibidhka. Inta badan ee qadarku yahay, xoogga yar ayaa noqon doona; Viscosity-ka yar, ayaa sii weynaan doonta saameynta ay ku yeelanayso luminta xoogga isku-buuqa ee hoobiye; hydroxypropyl methyl cellulose ether Marka qiyaasta ay ka yar tahay 0.1%, xoogga cadaadiska ee hoobiye ayaa si habboon loo kordhin karaa. Marka qiyaasta ay ka badan tahay 0.1%, xoogga cadaadiska ee hoobiye ayaa hoos u dhigi doona kordhinta qiyaasta, markaa qiyaasta waa in lagu xakameeyaa 0.1%.
Jaantuska.4 3d, 7d iyo 28d xoog cadaadis ah ee MC1, MC2 iyo MC3 hoobiye sibidhka wax laga beddelay
(Methyl cellulose ether, viscosity 60000Pa·S, ka dib loo tixraaco MC1; methyl cellulose ether, viscosity 100000Pa·S, loo yaqaan MC2; hydroxypropyl methylcellulose ether, viscosity 100000Pa · S, loo yaqaan MC).
3. Cwaqti badan：
Marka la qiyaaso wakhtiga dejinta ee ether hydroxypropyl methylcellulose ether leh viscosity of 100000Pa·s ee qiyaasaha kala duwan ee koollada sibidhka, waxaa la ogaaday in korodhka qiyaasta HPMC, wakhtiga dejinta bilowga ah iyo wakhtiga ugu dambeeya ee hoobiye sibidhka ayaa la dheereeyey. Marka fiirsigu yahay 1%, wakhtiga dejinta bilowga ahi waxa uu gaaraa 510 daqiiqo, wakhtiga dejinta ugu danbayna waxa uu gaaraa 850 daqiiqo. Marka la barbar dhigo muunadda bannaan, wakhtiga dejinta bilowga waxa lagu kordhiyey 210 daqiiqo, wakhtiga dejinta u dambeeya waxa la kordhiyey 470 daqiiqo (sida ku cad sawirka 5). Haddii ay tahay HPMC oo leh viscosity of 50000Pa s, 100000Pa s ama 200000Pa s, waxay dib u dhigi kartaa dejinta sibidhka, laakiin marka la barbar dhigo saddexda ethers cellulose, wakhtiga dejinta bilowga ah iyo wakhtiga dejinta kama dambaysta ah ayaa la dheereeyaa iyada oo la kordhinayo viscosity, sida ku cad sawirka 6. Sababtoo ah ether-ka cellulose ayaa lagu dhejiyaa dusha sare ee qaybaha sibidhka, taas oo ka ilaalinaysa biyaha inay la xiriiraan qaybaha sibidhka, sidaas darteed dib u dhigista fuuq-celinta sibidhka. Markasta oo uu bato viscosity ether-ka cellulose, ayaa sii dhumucda lakabka adsorption ee dusha sare ee walxaha sibidhka, iyo waxa sii kordha saamaynta dib u dhigista.
Jaantuska.5 Saamaynta maadada ether-ka cellulose ee dejinta wakhtiga hoobiye
Fig.6 Saamaynta viscosities kala duwan ee HPMC on waqtiga dejinta ee koollada sibidhka
(MC-5(50000Pa·s), MC-10(100000Pa·s) iyo MC-20(200000Pa·s))
Methyl cellulose ether iyo hydroxypropyl methyl cellulose ether si weyn u dheerayn doonaa waqtiga dejinta ee slurry sibidhka, kaas oo hubin kara in slurry sibidhka uu leeyahay waqti ku filan iyo biyo falcelinta fuuq, iyo xaliyaan dhibaatada xoog hoose iyo marxaladda dambe ee cement slurry ka dib qallafsanaan. dhibaato dildilaaca.
4. Haysashada biyaha:
Saamaynta ay ku leedahay maadada ether-ka cellulose ee haynta biyaha ayaa la darsay. Waxaa la ogaaday in kororka maadada etherka cellulose, heerka haynta biyaha ee hoobiye uu kordho, iyo marka maadada etherka cellulose ay ka weyn tahay 0.6%, heerka haynta biyuhu waxay u egtahay inay xasilloon tahay. Si kastaba ha noqotee, marka la barbardhigo seddex nooc oo ethers cellulose ah (HPMC oo leh viscosity of 50000Pa s (MC-5), 100000Pa s (MC-10) iyo 200000Pa s (MC-20)), saamaynta viscosity ee haynta biyaha way ka duwan tahay. Xidhiidhka ka dhexeeya heerka haynta biyaha waa: MC-5.
Waqtiga boostada: Abriil-28-2024