Pamene polycarboxylic acid ofotokoza mkulu-mwachangu superplasticizer (madzi kuchepetsa wothandizira) amawonjezeredwa mu kuchuluka kwa 0.2% mpaka 0.3% ya kulemera kwa simenti, mlingo wochepetsera madzi ukhoza kukhala 25% mpaka 45%. Nthawi zambiri amakhulupirira kuti polycarboxylic acid-based high-efficiency yochepetsera madzi imakhala ndi mawonekedwe owoneka ngati chisa, omwe amapanga chotchinga chotchinga mwa kutsatsa tinthu tating'ono ta simenti kapena zinthu za simenti ya simenti, ndipo amatenga nawo gawo pakubalalitsa ndi kusunga kubalalitsidwa kwa simenti. Kufufuza kwa ma adsorption azinthu zochepetsera madzi pamtunda wa gypsum particles ndi njira yawo yotsatsira adsorption-dispersion yawonetsa kuti polycarboxylic acid-based high-efficiency water-reduction agent ndi mawonekedwe a chisa, ndi kutsekemera pang'ono pamtunda wa electrostatic repulsion ndi mphamvu yofooka. Zotsatira zake zobalalitsa makamaka zimachokera ku steric chotchinga cha adsorption layer. The dispersibility opangidwa ndi steric cholepheretsa zotsatira zochepa amakhudzidwa ndi hydration wa gypsum, motero amakhala wabwino kubalalitsidwa bata.
Simenti ili ndi mphamvu yolimbikitsa gypsum, yomwe idzafulumizitsa nthawi yokhazikitsa gypsum. Pamene mlingo umaposa 2%, udzakhala ndi mphamvu yaikulu pamadzimadzi oyambirira, ndipo madziwo amatha kuwonongeka ndi kuwonjezeka kwa mlingo wa simenti. Popeza simenti imakhala ndi zotsatira zolimbikitsira pa gypsum, kuti muchepetse nthawi yoyika gypsum pa gypsum fluidity, kuchuluka koyenera kwa gypsum retarder kumawonjezeredwa ku gypsum. The fluidity wa gypsum kumawonjezeka ndi kuwonjezeka kwa simenti mlingo; kuwonjezera kwa simenti kumawonjezera alkalinity ya dongosolo, kupangitsa kuti madzi ochepetsetsa asokonezeke mofulumira komanso mokwanira mu dongosolo, ndipo kuchepetsa madzi kumawonjezeka kwambiri; panthawi imodzimodziyo, popeza madzi amadzimadzi a simenti okha ndi ochepa, ndi ofanana ndi kuonjezera chiwerengero cha simenti ya madzi pansi pa kuchuluka kwa madzi, zomwe zidzawonjezeranso madzi pang'ono.
Polycarboxylate water reducer ali ndi dispersibility kwambiri ndipo amatha kwambiri kusintha fluidity wa gypsum pa mlingo otsika. Ndi kuwonjezeka kwa mlingo, fluidity ya gypsum imakula kwambiri. Polycarboxylate water reducer imakhala ndi mphamvu yochepetsetsa. Ndi kuwonjezeka kwa mlingo, nthawi yokhazikitsa imakula kwambiri. Ndi mphamvu yochepetsetsa ya polycarboxylate water reducer, pansi pa chiŵerengero chomwecho cha madzi ndi simenti, kuwonjezeka kwa mlingo kungayambitse kusinthika kwa makhiristo a gypsum ndi kumasulidwa kwa gypsum. Mphamvu zosinthika komanso zopondereza za gypsum zimachepa ndi kuchuluka kwa mlingo.
Ma polycarboxylate ether ochepetsa madzi amachepetsa kuyika kwa gypsum ndikuchepetsa mphamvu yake. Pa mlingo womwewo, kuwonjezera simenti kapena calcium oxide ku gypsum kumawonjezera madzi ake. Izi zimachepetsa chiŵerengero cha madzi ndi simenti, kumawonjezera kachulukidwe ka gypsum, motero mphamvu yake. Kuphatikiza apo, kulimbikitsa kwa zinthu za simenti hydration pa gypsum kumawonjezera mphamvu zake zosinthika komanso zopondereza. Kuchulukitsa kuchuluka kwa simenti ndi calcium oxide kumawonjezera kusungunuka kwa gypsum, ndipo simenti yoyenera imatha kukulitsa mphamvu zake.
Mukamagwiritsa ntchito polycarboxylate etha kuchepetsa madzi mu gypsum, kuwonjezera kuchuluka koyenera kwa simenti sikuti kumangowonjezera mphamvu zake komanso kumapereka madzi ochulukirapo komanso kukhudza kochepa pa nthawi yake.
Nthawi yotumiza: Aug-06-2025