Cellulose ether ine simba rekudzora dhaka. Nekuwedzera kwehuwandu hwe cellulose ether, nguva yekugadzika dhaka inowedzera. Kudzora dhaka re cellulose ether pa cement paste kunonyanya kuenderana nehuwandu hwekutsiva boka re alkyl, ukuwo isina chekuita nehuremu hwayo hwemamorekuru.
Kana huwandu hwealkyl substitution hukave hudiki, hydroxyl iri mu hydroxyl inowedzera, uye kana cellulose ether ikanyanya kuoneka, zvinoita kuti complex film layer inonoka kuyerera kwe hydration ye simende pakutanga, saka mhedzisiro yekunonoka inoonekwawo zvakanyanya.
Simba ndeimwe yezviratidzo zvakakosha zvekuongorora simba rekugadzirisa zvinhu zvesimende zvakagadzirwa nesimende pamusanganiswa. Kana chiyero che cellulose ether chikawedzera, simba rekumanikidza uye simba rekutenderera remota rinodzikira. Simba rekusungana kwesimbi yesimende yakasanganiswa ne cellulose ether rinovandudzika; Simba rekutenderera uye rekumanikidza remota yesimende rinodzikira, uye chiyero chikuru, simba rinodzikira;
Mushure mekusanganisa hydroxypropyl methyl cellulose ether, nekuwedzera kwemuyero, simba re flexural re cement mortar rinotanga rawedzera uye rozodzikira, uye simba rekudzvanya rinodzikira zvishoma nezvishoma. Muyero wakakodzera unofanirwa kudzorwa pa 0.1%.
Cellulose ether ine simba guru pakushanda kwesimbi yesimbi. Cellulose ether inogadzira firimu repolymer rine simba rekuvhara pakati pesimbi yesimbi yesimbi iri mu liquid phase system, izvo zvinoita kuti mvura yakawanda ibude mufirimu repolymer kunze kwesimbi yesimbi, izvo zvinoita kuti simende irambe ichinyoroveswa zvakakwana, nokudaro zvichivandudza simba resimbi yesimbi mushure mekuoma.
Panguva imwe chete, huwandu hwakakodzera hwe cellulose ether hunosimudzira plasticity uye kuchinjika kwemota, hunoderedza kuomarara kwenzvimbo yekuchinja pakati pemota ne substrate interface, uye hunoderedza kugona kutsvedza pakati pema interfaces. Kusvika pamwero wakati, mhedzisiro yekubatana pakati pemota ne substrate inowedzerwa.
Pamusoro pezvo, nekuda kwekuvapo kwe cellulose ether mu cement paste, nzvimbo yakakosha yekuchinja interface uye interface layer zvinoumbwa pakati pezvidimbu zvemortar nechigadzirwa che hydration. Iyi interface layer inoita kuti nzvimbo yekuchinja interface ive nyore uye isaoma. Saka, inoita kuti mortar ive nesimba rakasimba rekubatanidza.
Nguva yekutumira: Chikumi-02-2023