Kukula ndi kugwiritsa ntchito kwapolycarboxylic superplasticizerndi mofulumira. Makamaka m'mapulojekiti akuluakulu komanso ofunikira monga kusunga madzi, hydropower, hydraulic engineering, marine engineering, ndi milatho, polycarboxylate superplastisizer amagwiritsidwa ntchito kwambiri.
Pambuyo simenti wothira madzi, simenti slurry imapanga flocculation dongosolo chifukwa cha mphamvu yokoka maselo a particles simenti, kotero kuti 10% mpaka 30% ya madzi kusakaniza wokutidwa mu particles simenti ndipo sangathe nawo otaya ndi kondomu, motero zimakhudza Flowability wa kusakaniza konkire. Pamene supreplasticizer ndi anawonjezera, madzi kuchepetsa wothandizila mamolekyu akhoza directionally adsorbed padziko particles simenti, kuti pamwamba pa particles simenti ndi mlandu womwewo (nthawi zambiri zoipa mlandu), kupanga electrostatic repulsion, amene amalimbikitsa kubalalitsidwa mwawiri wa particles simenti ndi chiwonongeko cha dongosolo floc. , kumasula mbali ya madzi atakulungidwa kutenga nawo mbali mu otaya, potero mogwira kuwonjezera fluidity wa osakaniza konkire.
Gulu la hydrophilic muwothandizira kuchepetsa madzindi polar kwambiri, kotero madzi kuchepetsa wothandizira adsorption filimu pamwamba pa particles simenti akhoza kupanga khola solvated madzi filimu ndi mamolekyu madzi. Izi filimu madzi ali wabwino kondomu tingati kuchepetsa kutsetsereka kukana pakati simenti particles, potero kupititsa patsogolo fluidity wa matope ndi konkire.
The hydrophilic nthambi unyolo musuperplasticizerKapangidwe amatambasula mu amadzimadzi njira, potero kupanga hydrophilic azithunzi-thunzi atatu adsorption wosanjikiza ndi ena makulidwe padziko adsorbed simenti particles. Pamene tinthu tating'ono ta simenti tili pafupi wina ndi mzake, zigawo za adsorption zimayamba kugwirizana, ndiko kuti, kulepheretsa steric kumachitika pakati pa tinthu tating'ono ta simenti. Kuphatikizika kochulukira, ndikokulirapo kwa steric repulsion, komanso kutsekeka kwakukulu kwa mgwirizano pakati pa tinthu ta simenti, kupanga matope ndi konkriti Slump imakhalabe yabwino.
Pa kukonzekera ndondomeko yapolycarboxylate kuchepetsa madzi, maunyolo ena a nthambi amamezetsanidwa pa mamolekyu a chinthu chochepetsera madzi. Izi nthambi unyolo osati amapereka wosabala cholepheretsa tingati, komanso, mu mkulu alkalinity chilengedwe simenti hydration, Unyolo Nthambi angathenso kudulidwa pang'onopang'ono, potero kumasula asidi polycarboxylic ndi dispersing kwenikweni, amene angathe kusintha kubalalitsidwa zotsatira za particles simenti ndi kulamulira kugwa imfa.
Nthawi yotumiza: Mar-29-2024