Kukula ndi kugwiritsa ntchitopolycarboxylic superplasticizerndi mofulumira. Makamaka m'mapulojekiti akuluakulu komanso ofunikira monga kusunga madzi, hydropower, hydraulic engineering, marine engineering, ndi milatho, polycarboxylate superplastisizer amagwiritsidwa ntchito kwambiri.
Simenti ikasakanizidwa ndi madzi, matope a simenti amapanga mawonekedwe a flocculation chifukwa cha mphamvu yokoka ya tinthu tating'ono ta simenti, kotero kuti 10% mpaka 30% ya madzi osakaniza amakutidwa ndi tinthu tating'onoting'ono ta simenti ndipo sangathe kutenga nawo gawo pakuyenda kwaulere ndi mafuta. , motero zimakhudza Flowability wa konkire mix. Pamene supreplasticizer ndi anawonjezera, madzi kuchepetsa wothandizila mamolekyu akhoza directionally adsorbed pamwamba pa particles simenti, kuti pamwamba pa particles simenti ndi mlandu womwewo (nthawi zambiri zoipa mlandu), kupanga electrostatic repulsion, amene amalimbikitsa onse awiri. kubalalitsidwa kwa particles simenti ndi chiwonongeko cha flocculation dongosolo. , 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. Unyolo wa nthambiwu umangopereka chotchinga chotchinga chokha, komanso, m'malo amchere amchere a simenti, unyolo wanthambi ukhozanso kudulidwa pang'onopang'ono, potero kutulutsa asidi a polycarboxylic ndi dispersing effect, yomwe imatha kusintha kufalikira kwa tinthu tating'onoting'ono ta simenti. chepetsa kuchepa kwa kuchepa.
Nthawi yotumiza: Mar-29-2024