Cellulose ethers imhando ye organic polymer komisheni yakagadziridzwa kubva kune yakasikwa cellulose. Ivo vanowanzoshandiswa mukuvaka zvinhu, kunyanya mune simende-based zvinhu. Simba re cellulose ether pane simenti hydration process inonyanya kuratidzwa mune zvinotevera zvinhu: kupararira kwemasimende zvimedu, kuchengetwa kwemvura, kukora mhedzisiro, uye pesvedzero pane morphology uye kukura kwesimba kwesimende hydration zvigadzirwa.
1. Nhanganyaya kune simenti hydration
Iyo hydration process ye simenti inoteedzana yakaoma yemuviri uye kemikari kuita pakati pe simenti nemvura. Izvi zvinokonzeresa kuti simende paste iome zvishoma nezvishoma kuti iite chimiro chakasimba, ichizopedzisira ichigadzira hydration zvigadzirwa senge calcium silicate hydrate (CSH) uye calcium hydroxide (CH). Munguva iyi, iyo hydration reaction rate ye simenti, iyo fluidity uye kuchengetwa kwemvura kwe slurry, uye kuumbwa kwe hydration zvigadzirwa zvinokanganisa zvakananga kusimba uye kusimba kwekupedzisira kongiri.
2. Iyo nzira yekuita kwe cellulose ethers
Cellulose ether inoita basa rakakosha rekuita muviri uye kemikari mukuita simende hydration. Cellulose ether inonyanya kukanganisa hydration process ye simenti munzira mbiri: imwe ndeyekukanganisa kugovera uye kubuda kwemvura mune simenti slurry; imwe yacho ndeye kukanganisa kupararira uye kubatana kwezvikamu zvesimende.
Kudzora unyoro uye kuchengetedza mvura
Cellulose ethers inogona kuvandudza zvakanyanya kuchengetwa kwemvura yesimende-yakavakirwa zvinhu. Nekuda kweiyo yakasimba hydrophilicity, cellulose ether inogona kugadzira yakagadzikana colloidal mhinduro mumvura, inogona kutora uye kuchengetedza unyoro. Iyi inobata mvura yakakosha mukuderedza kutsemuka kunokonzerwa nekurasikirwa kwemvura nekukurumidza mukongiri panguva yekutanga hydration. Kunyanya munzvimbo dzakaoma kana kudziya kwepamusoro-tembiricha mamiriro ekuvaka, cellulose ether inogona kunyatso kudzivirira mvura kubva pakubuda nekukurumidza uye kuve nechokwadi chekuti huwandu hwemvura mune simende slurry hwakakwana kutsigira yakajairika hydration reaction.
Rheology uye Kukora
Cellulose ethers inogonawo kuvandudza rheology ye simenti slurries. Mushure mekuwedzera cellulose ether, kuwirirana kwesamende slurry kuchawedzera zvakanyanya. Ichi chiitiko chinonyanya kuverengerwa kune refu cheni chimiro chakagadzirwa ne cellulose ether mamorekuru mumvura. Iyi molecule yakareba-cheni inogona kurambidza kufamba kwemasimende, nokudaro kuwedzera viscosity uye kuwirirana kwe slurry. Ichi chivakwa chakanyanya kukosha mumashandisirwo akadai sekupurasita uye anonamira mataira, sezvo ichidzivirira simende dhaka kuti isayerera nekukasira uku ichipa zvirinani kuvaka.
Kunonoka hydration uye gadzirisa kuseta nguva
Cellulose ether inogona kunonoka hydration reaction ye simenti uye kuwedzera kugadzika kwekutanga uye nguva yekupedzisira yekuisa simende slurry. Mhedzisiro iyi inoitika nekuti mamorekuru e cellulose ether adsorbed pamusoro pezvimedu zvesimende, achigadzira chipingamupinyi chinodzivirira kusangana kwakananga pakati pemvura nesamende zvimedu, nekudaro kunonoka kuita kwehydration. Nokunonoka kuisa nguva, cellulose ethers inogona kuvandudza kushanda kwekuvaka, ichipa vashandi vekuvaka nguva yakawanda yekugadzirisa uye kugadzirisa.
3. Mhedzisiro pachimiro chesimenti hydration zvigadzirwa
Kuvapo kwe cellulose ethers kunokanganisawo microstructure ye simenti hydration zvigadzirwa. Zvidzidzo zvakaratidza kuti morphology ye calcium silicate hydrate (CSH) gel inoshanduka mushure mekuwedzera cellulose ether. Cellulose ether mamorekuru anogona kukanganisa chimiro chekristaro cheCSH, ichiita kuti ive yakasununguka. Ichi chakasununguka chimiro chinogona kuderedza simba rekutanga kune imwe nhanho, asi inobatsirawo kuvandudza kuoma kwezvinhu.
Cellulose ethers inogonawo kuderedza kuumbwa kwe ettringite panguva ye hydration process. Sezvo cellulose ether inodzosa chiyero che hydration reaction, chiyero chekugadzira ettringite mu simenti inoderedzwa, nokudaro kuderedza kushushikana kwemukati kunokonzerwa nekuwedzera kwevhoriyamu panguva yekurapa.
4. Mhedzisiro pakukura kwesimba
Cellulose ethers zvakare ine simba rakakosha pakukura kwesimba resimende-yakavakirwa zvinhu. Nekuda kwekuti ma cellulose ethers anodzoreredza mwero wehydration we simende, kutanga kwesimba kwesimba remasimende paste kunowanzo kunonoka. Nekudaro, sezvo iyo hydration reaction inoenderera mberi, iyo inogadzirisa mhedzisiro ye cellulose ether kuchengetedza mvura uye hydration chigadzirwa morphology inogona kubuda zvishoma nezvishoma, izvo zvichabatsira kuvandudza simba mune inotevera nhanho.
Izvo zvinofanirwa kucherechedzwa kuti iyo yakawedzerwa chiyero uye mhando ye cellulose ether ine mbiri mbiri pane simba. Huwandu hwakakodzera hweselulosi ether hunogona kuvandudza mashandiro ekuvaka uye kuwedzera simba gare gare, asi kushandisa zvakanyanya kunogona kutungamira mukudzikira kwesimba rekutanga resimende-yakavakirwa zvinhu uye kukanganisa yekupedzisira mashandiro emagetsi. Naizvozvo, mumashandisirwo anoshanda, mhando uye chipimo che cellulose ether chinoda kukwenenzverwa uye kugadzirwa zvinoenderana nezvinodiwa zveinjiniya.
Cellulose ether inokanganisa hydration process uye zvinhu zvesimende nekuvandudza kuchengetwa kwemvura yesimende-based zvinhu, kugadzirisa iyo hydration rate, uye kukanganisa maitiro e hydration zvigadzirwa. Kunyangwe cellulose ethers inogona kukonzera kurasikirwa kwesimba rekutanga, inogona kuvandudza kusimba uye kusimba kwekongiri munguva refu. Kuwedzerwa kwe cellulose ether kunogonawo kuvandudza zvakanyanya kushanda kwekuvaka, kunyanya mumamiriro ekushandiswa anoda nguva refu yekushanda uye mvura yakakwirira yekuchengetedza zvinodiwa. Iine zvakanakira zvisingadzoreki. Mumashandisirwo einjiniya chaiwo, sarudzo ine musoro yerudzi uye chiyero che cellulose ether inogona kuenzanisa simba, kuita kwekuvaka uye kusimba zvinodiwa zvechinhu.
Nguva yekutumira: Sep-27-2024