Cellulose etherIzvi zvichawedzera nguva yekugadzika simende kana mambure esimbi, zvinononotsa hydration yesimbi, izvo zvinobatsira kuvandudza nguva yekushanda kwesimbi yesimbi, kuvandudza kugadzikana uye kudonha kwesimbi mushure mekurasikirwa, asiwo zvinogona kunonotsa kufambira mberi kwekuvaka, kunyanya mumamiriro ekunze ekupisa kwakaderera pakushandisa simende nesimbi.
Kazhinji, kana huwandu hwe cellulose ether hwakakwira, nguva yekuiswa kwe slurry ne mortar inoreba, uye kunonoka kwe hydration kunoonekwa zvakanyanya. Cellulose ether inogona kunonoka kunyorova kwe clinker mineral phases tricalcium aluminate (C3A) uye tricalcium silicate (C3S) mu cement, asi mhedzisiro pa hydration kinetics dzavo haina kufanana. Cellulose ether inonyanya kuderedza reaction rate yeC3S mu acceleration phase, nepo kune C3A-Caso4 system, inonyanya kuwedzera nguva ye induction.
Kumwe kuyedza kwakaratidza kuti cellulose ether inogona kudzivirira kunyungudika kweC3A neC3S, kunonotsa kugadzirwa kwe hydrated calcium aluminate uye calcium hydroxide, uye kuderedza nucleation uye kukura kweCSH pamusoro peC3S particles, asi hazvina zvazvakabatsira pamakristaro ettringite. Weyer nevamwe vake vakaona kuti mwero wekuchinjana DS ndiyo yaive chinhu chikuru chaikanganisa hydration yesimende, uye DS diki yaive, zviri pachena kuti hydration yesimende yainonoka. Pamashandisirwo e cellulose ether inononotsa hydration yesimende.
Sliva nevamwe vake vaidavira kuti cellulose ether yakawedzera viscosity yemushonga wepore uye yaidzivisa kufamba kwemaion, nokudaro ichinonotsa hydration yesimende. Zvisinei, Pourchez nevamwe vake vakaona kuti hukama huripo pakati pe cellulose ether yakanonoka hydration yesimende uye cement slurry viscosity hwakanga husiri pachena. Schmitz nevamwe vake vakaona kuti viscosity ye cellulose ether yakanga isina kana chayakaita pa hydration kinetics yesimende.
Pourchez akawanawo kuti cellulose ether yakanga yakagadzikana zvikuru mumamiriro ealkaline uye kunonoka kwayo kunyorova kwesimende hakugone kukonzerwa nekuora kweether ye celluloseKunyungudika kwesimbi kungave kuri iko chikonzero chaicho chekunonoka kwesimbi ye cellulose ether, zvimwe zvinhu zvakawanda zve organic zvinonyungudika kusimbi ye simende nezvigadzirwa zve hydration, zvinodzivirira kunyungudika kwesimbi ye simende ne crystallization yezvigadzirwa zve hydration, nokudaro zvichinonotsa kunyungudika kwesimbi ne condensation ye simende. Pourchcz nevamwe vake vakaona kuti kana simba re hydration yesimbi ye cellulose ether rikawedzera, kunonoka kwacho kunonyanya kuoneka.
Zvinotendwa kuti mamorekuru e-cellulose ether anonyanya kunamirwa pazvigadzirwa zvemvura uye haawanzo kunamirwa pachikamu chekutanga chemineral checlinker.
Nguva yekutumira: Kubvumbi-28-2024