Cellulose etherichawedzera nguva yekuisa simende paste kana dhaka mambure, inonoke simende hydration kinetics, iyo inobatsira kuvandudza nguva yekushanda yesimende base zvinhu, kuvandudza kusimba uye kongiri inodonha mushure mekurasikirwa, asi zvakare inogona kunonoka kufambira mberi kwekuvaka, kunyanya mumamiriro ekunze ekupisa kwekushandiswa kwedhaka nekongiri.
Kazhinji, kukwirisa kwemukati we cellulose ether, kunowedzera nguva yekuseta simende slurry nedhaka, uye zvakanyanya kuoneka kunonoka hydration dynamics. Cellulose ether inogona kunonoka hydration yeakanyanya kukosha clinker mineral phases tricalcium aluminate (C3A) uye tricalcium silicate (C3S) mu simenti, asi mhedzisiro pa hydration kinetics yavo haina kufanana. Cellulose ether inonyanya kuderedza maitiro eC3S muchikamu chekuwedzera, nepo C3A-Caso4 system, inonyanya kuwedzera nguva yekupinza.
Zvimwe zviedzo zvakaratidza kuti cellulose ether inogona kurambidza kuparara kweC3A neC3S, kunonoka crystallization ye hydrated calcium aluminate uye calcium hydroxide, uye kuderedza nucleation uye kukura kweCSH pamusoro peC3S particles, asi yakave nemigumisiro shoma pane ettringite crystals. Weyer et al. akawana kuti dhigirii rekutsinhanisa DS ndicho chinhu chikuru chinokanganisa simenti hydration, uye DS diki yaive, zvakanyanya kuoneka kunonoka simende hydration yaive. Pamusoro pemashini ye cellulose ether kunonoka simenti hydration.
Sliva et al. aidavira kuti cellulose ether yakawedzera viscosity yemushonga wepore uye ichitadzisa chiyero chekufamba kweion, nokudaro kunonoka simende hydration. Zvisinei, Pourchez et al. akawana kuti hukama pakati pe cellulose ether kunonoka simenti hydration uye simenti slurry viscosity yakanga isiri pachena. Schmitz et al. akawana kuti viscosity ye cellulose ether yakanga isingaite pane hydration kinetics ye simenti.
Pourchez akawana zvakare kuti cellulose ether yaive yakagadzikana zvakanyanya pasi pemamiriro ealkaline uye kunonoka kwayo simende hydration haigone kuverengerwa nekuora kwe.cellulose ether. Adsorption inogona kunge iri chikonzero chaicho cellulose ether inonoke simende hydration, akawanda ekuwedzera ezve organic anozoshambadzirwa kune simende zvimedu uye hydration zvigadzirwa, kudzivirira kunyungudika kwemasimende uye crystallization yezvigadzirwa zve hydration, nekudaro kunonoka hydration uye condensation yesimende. Pourchcz et al. akawana kuti kusimba kwe adsorption yezvigadzirwa zve hydration uye cellulose ether, ndiko kunowedzera kunonoka.
Zvinowanzotendwa kuti cellulose ether mamorekuru anonyanya kushambadzirwa pane zvigadzirwa zve hydration uye haawanzo kushambadzira pane yekutanga mineral chikamu che clinker.
Nguva yekutumira: Kubvumbi-28-2024