Cellulose ether imhando ye organic polymer compound inoshandiswa zvakanyanya mukuvaka, kunyanya mune simende-based materials. Cellulose ether inogona kunonoka iyo hydration process ye simenti, nekudaro kugadzirisa kushanda, kuseta nguva uye yekutanga simba kusimudzira simende paste.
(1). Kunonoka hydration reaction
Cellulose ether inogona kunonoka hydration reaction ye simenti, iyo inonyanya kuwanikwa kuburikidza nenzira dzinotevera:
1.1 Adsorption uye kudzivirira mhedzisiro
Iyo yakakwira viscosity mhinduro inoumbwa nekunyungudutsa cellulose ether mune aqueous solution inogona kugadzira adsorption firimu pamusoro pemasimende esimende. Kuumbwa kwefirimu iri kunonyanya kukonzerwa nekushambadza kwemuviri kwemapoka e-hydroxyl mu cellulose ether mamorekuru uye ion pamusoro pemasimende, izvo zvinoita kuti pamusoro pemasimende zvidzivirirwe, zvichideredza kusangana pakati pemasimende uye mamorekuru emvura, nekudaro. kunonoka hydration reaction.
1.2 Kugadzira firimu
Mumatanho ekutanga e simenti hydration, cellulose ether inogona kuumba firimu rakakora pamusoro pemasimende esimende. Kuvapo kwemufirimu uyu kunokanganisa kupararira kwemamorekuru emvura mukati mezvikamu zvesimende, nekudaro kunonotsa hydration rate yesamende. Mukuwedzera, kuumbwa kwefirimu iyi kunogonawo kuderedza kuparara uye kupararira kwe calcium ions, zvichiwedzera kunonoka kuumbwa kwezvigadzirwa zve hydration.
1.3 Kuparara uye kusunungurwa kwemvura
Cellulose ether ine kunyura kwemvura kwakasimba, inogona kutora unyoro uye kuisunungura zvishoma nezvishoma. Iyi nzira yekuburitsa mvura inogona kugadzirisa fluidity uye kushanda kwe simenti slurry kune imwe nhanho, uye inonoke chiyero che hydration reaction nekudzikisa kunoshanda kwemvura panguva ye hydration process.
(2). Kufurira kwesement phase composition
Cellulose ethers ine mhedzisiro dzakasiyana pane hydration yezvikamu zvakasiyana simende. Kazhinji, cellulose ether ine mhedzisiro yakajeka pane hydration ye tricalcium silicate (C₃S). Kuvapo kwe cellulose ether kunozononotsa hydration yeC₃S uye kuderedza kuburitswa kweyekutanga hydration kupisa kweC₃S, nekudaro kunonotsa kukura kwesimba rekutanga. Mukuwedzera, cellulose ethers inogonawo kukanganisa hydration yemamwe mamineral components akadai sedicalcium silicate (C₂S) uye tricalcium aluminate (C₃A), asi izvi zvinokonzerwa zvishoma.
(3). Rheology uye maitiro ekugadzirisa
Cellulose ether inogona kuwedzera viscosity ye simenti slurry uye inokanganisa rheology yayo. Yakakwira viscosity slurry inobatsira kudzikisa kugadzirisa uye stratification yemasimende zvimedu, zvichibvumira simende slurry kuchengetedza kufanana kwakanaka kusati kwaiswa. Iyi yakakwirira viscosity hunhu haingononotse iyo hydration process ye simenti, asi zvakare inovandudza fluidity uye kuvaka kwekuita kwe simende slurry.
(4). Maitiro ekushandisa uye zvidziviriro
Cellulose ethers ine mhedzisiro yakakosha mukudzoreredza simende hydration uye saka inowanzoshandiswa kugadzirisa nguva yekumisikidza uye fluidity ye simende-yakavakirwa zvinhu. Zvisinei, chiyero uye rudzi rwe cellulose ether inoda kunyatsodzorwa, nokuti yakawandisa cellulose ether inogona kukonzera matambudziko akadai sekusakwana kwesimba rekutanga uye kuwedzera kuderera kwezvinhu zvakagadzirirwa simende. Mukuwedzera, marudzi akasiyana-siyana e-cellulose ethers (akadai semethylcellulose, hydroxypropylmethylcellulose, nezvimwewo) ane maitiro akasiyana-siyana uye zvinokonzerwa nesamende slurries, uye inoda kusarudzwa maererano nezvinodiwa zvekushandisa.
Kushandiswa kwe cellulose ether mune sement-based zvinhu hakugone chete kunonoka kunonoka kwe hydration reaction ye simenti, asi zvakare kunatsiridza mashandiro ekuvaka uye kusimba kwechinhu. Kuburikidza nekusarudzwa kwakanaka uye kushandiswa kwema cellulose ethers, kunaka uye kuvaka kwesement-based zvinhu zvinogona kuvandudzwa zvakanyanya.
Nguva yekutumira: Aug-03-2024