Kuvandudzwa uye kushandiswa kwepolycarboxylic superplasticizerinokurumidza.Kunyanya mumapurojekiti makuru uye akakosha akadai sekuchengetedza mvura, hydropower, hydraulic engineering, marine engineering, uye mabhiriji, polycarboxylate superplastisizer inoshandiswa zvakanyanya.
Mushure mekunge simende yakasanganiswa nemvura, iyo simende slurry inoumba flocculation chimiro nekuda kweiyo molecular gravity yemasimende zvimedu, kuitira kuti 10% kusvika 30% yemvura inosanganiswa yakaputirwa muzvikamu zvesimende uye haigone kutora chikamu mukuyerera kwemahara uye lubrication. , nokudaro kukanganisa Flowability yekongiri musanganiswa.Kana iyo supreplasticizer yawedzerwa, mamorekuru anoderedza mvura anogona kushambadzwa negwara pamusoro pezvikamu zvesimende, kuitira kuti nzvimbo dzemasimende dzive nechaji yakafanana (kazhinji yakaipa charge), ichiita electrostatic repulsion, inosimudzira kuwirirana. kupararira kwezvikamu zvesimenti uye kuparadzwa kwechimiro che flocculation., kusunungura chikamu chemvura yakaputirwa kuti itore chikamu mukuyerera, nokudaro zvinobudirira kuwedzera fluidity yemusanganiswa wekrete.
Iro hydrophilic boka mumvura-kuderedza mumiriririyakanyanya polar, saka iyo inoderedza mvura adsorption firimu pamusoro pezvikamu zvesimende inogona kuumba yakagadzikana yakanyungudika firimu remvura ine mamorekuru emvura.Iyi firimu yemvura ine yakanaka lubrication mhedzisiro uye inogona kunyatso kudzikisa kutsvedza kupikisa pakati pemasimende, nekudaro ichiwedzera kuvandudza fluidity yedhaka nekongiri.
Iyo hydrophilic branched cheni musuperplasticizerchimiro chinotambanuka mumushonga wemvura, nekudaro kugadzira hydrophilic matatu-dimensional adsorption layer ine humwe ukobvu pamusoro peiyo adsorbed simende zvimedu.Kana masendi masimende ari pedyo kune mumwe nemumwe, iyo adsorption layers inotanga kupindirana, ndiko kuti, steric hindrance inoitika pakati pemasimende masimende.Iyo yakanyanya kupindirana, iyo yakakura steric repulsion, uye yakanyanya kuvharidzira kubatanidzwa pakati pemasimende, kuita dhaka nekongiri Slump inoramba yakanaka.
Panguva yekugadzirira nzira yepolycarboxylate mvura-inoderedza mumiririri, mamwe maketani ane matavi anobatanidzwa pamamorekuru emugadziri wekudzikisa mvura.Iyi ketani ine branched haingopi chete steric hindrance effect, asiwo, munzvimbo yakakwirira ye alkalinity ye simenti hydration, Iketani yebazi inogonawo kutemwa zvishoma nezvishoma, nokudaro ichibudisa polycarboxylic acid ine dispersing effect, iyo inogona kuvandudza kupararira kwesement particles uye. kudzora kurasikirwa kwekudonha.
Nguva yekutumira: Mar-29-2024