Tsiku Lotumiza:20,Feb,2023
Kodi chochepetsera madzi ndi chiyani?
Madzi ochepetsera, omwe amadziwikanso kuti dispersant kapena plasticizer, ndiye chowonjezera chogwiritsidwa ntchito kwambiri komanso chofunikira kwambiri mu konkriti yosakanikirana yokonzeka. Chifukwa adsorption ake ndi kubalalitsidwa, kunyowetsa ndi poterera zotsatira, akhoza kwambiri kuchepetsa kumwa madzi konkire mwatsopano ndi chimodzimodzi ntchito ntchito pambuyo ntchito, motero kwambiri kusintha mphamvu, durability ndi zina katundu konkire.
Madzi ochepetsera amatha kugawidwa m'mitundu iwiri malinga ndi momwe amachepetsera madzi: wamba wochepetsera madzi komanso wochepetsera kwambiri madzi. The madzi kuchepetsa wothandizila akhoza kuwonjezeredwa ndi admixtures ena kupanga oyambirira mphamvu mtundu, mtundu wamba, mtundu retarding ndi mpweya entraining mtundu kuchepetsa wothandizila madzi malinga ndi zosowa zaumisiri ntchito.
Madzi kuchepetsa wothandizila akhoza kugawidwa mu lignosulfonate ndi zotumphukira zake, polycyclic onunkhira sulfonic asidi mchere, madzi sungunuka utomoni sulfonic acid salt, aliphatic sulfonic acid salt, apamwamba polyols, hydroxy carboxylic acid salt, polyol complexes, polyoxyethylene ethers ndi zotumphukira zawo. zigawo zikuluzikulu za mankhwala.
Kodi njira yochepetsera madzi ndi yotani?
Zonse zochepetsera madzi ndizomwe zimagwiritsidwa ntchito pamtunda. Mphamvu yochepetsera madzi yochepetsera madzi imadziwika makamaka ndi ntchito yapamadzi yochepetsera madzi. Njira yayikulu yochepetsera madzi ndi motere:
1) The reducer madzi adzakhala adsorb pa olimba-zamadzimadzi mawonekedwe, kuchepetsa mavuto padziko, kusintha kunyowa pamwamba pa simenti particles, kuchepetsa Kusakhazikika thermodynamic wa simenti kubalalitsidwa, motero kupeza bata wachibale.
2) The reducer madzi adzatulutsa malangizo adsorption padziko particles simenti, kuti pamwamba pa particles simenti adzakhala ndi mlandu womwewo, kupanga electrostatic repulsion, motero kuwononga dongosolo flocculated wa particles simenti ndi dispersing particles simenti. Pakuti polycarboxylate ndi sulfamate superplasticizers, ndi adsorption wa superplasticizer ali mu mawonekedwe a mphete, waya ndi zida, motero kuwonjezera mtunda pakati pa particles simenti kupanga electrostatic repulsion, kusonyeza bwino kubalalitsidwa ndi kugwa posungira.
3) Mafilimu osungunuka amadzi amapangidwa kudzera mu mgwirizano wa hydrogen pakati pa chochepetsera madzi ndi mamolekyu amadzi kuti apange chitetezo cha mlengalenga, kuteteza kukhudzana kwachindunji kwa tinthu tating'ono ta simenti ndikuletsa mapangidwe a condensed.
4) Monga adsorption wosanjikiza aumbike pamwamba pa simenti particles, akhoza ziletsa koyamba hydration wa simenti, motero kuonjezera ufulu voliyumu madzi ndi kuwongolera fluidity wa simenti phala.
5) Othandizira ena ochepetsera madzi adzayambitsanso tinthu tating'ono tating'ono kuti tichepetse kukangana pakati pa tinthu tating'ono ta simenti, motero kumapangitsa kuti kufalikira ndi kukhazikika kwa matope a simenti.
Nthawi yotumiza: Feb-20-2023
