Xa i-polycarboxylic acid-based high-efficiency superplasticizer (iarhente yokunciphisa amanzi) yongezwa kwisixa se-0.2% ukuya kwi-0.3% yobuninzi bezinto ze-cementitious, izinga lokunciphisa amanzi lingaba phezulu kwi-25% ukuya kwi-45%. Ngokuqhelekileyo kukholelwa ukuba i-polycarboxylic acid-based-high-efficiency high-efficiency agent-agent-agent-agent-agent-agent-shaped-shaped structure, eyenza i-steric inhiinction effect ngokubhengeza kwiincinci zesamente okanye iimveliso ze-cement hydration, kwaye idlala indima ekusasazeni nasekugcineni ukusasazwa kwesamente. Uphononongo lweempawu ze-adsorption ze-agent zokunciphisa amanzi kumphezulu we-gypsum particles kunye ne-adsorption-dispersion mechanism ibonise ukuba i-polycarboxylic acid-based-high-effective-high-effecting agent yokunciphisa amanzi yi-adsorption efana ne-comb, kunye nenani elincinci le-adsorption kwi-gypsum surface ye-electrostatic repulsion kunye nomphumela obuthathaka. Isiphumo salo sokusasazeka sivela ikakhulu kwisiphumo se-steric hintrance ye-adsorption layer. I-dispersibility eveliswa yi-steric hindrance effect ayichatshazelwa kangako yi-hydration ye-gypsum, kwaye ngoko inozinzo oluhle lokusasazeka.
I-samente ine-setting-promoting effect kwi-gypsum, eya kukhawulezisa ixesha lokubeka i-gypsum. Xa i-dosage idlula i-2%, iya kuba nempembelelo enkulu kwi-fluidity yokuqala, kwaye i-fluidity iya kuhlahloka ngokunyuka kwedosi yesamente. Ekubeni i-samente ine-setting-promoting effect kwi-gypsum, ukwenzela ukunciphisa impembelelo yexesha lokumisa i-gypsum kwi-gypsum fluidity, inani elifanelekileyo le-gypsum retarder liyongezwa kwi-gypsum. I-fluidity ye-gypsum iyanda ngokunyuka kwedosi yesamente; ukongezwa kwesamente kwandisa i-alkalinity yenkqubo, okwenza ukuba umnciphisi wamanzi ahlukane ngokukhawuleza nangakumbi kwinkqubo, kwaye umphumo wokunciphisa amanzi uphuculwe kakhulu; kwangaxeshanye, ekubeni imfuno yamanzi yesamente ngokwawo iphantsi ngokwentelekiso, ilingana nokwandisa umlinganiselo wesamente yamanzi phantsi komlinganiselo ofanayo wokongezwa kwamanzi, okuya kwandisa kwakhona umbane kancinane.
Isinciphisi samanzi sePolycarboxylate sinokusasazeka okugqwesileyo kwaye sinokuphucula kakhulu ubumanzi begypsum kwidosi ephantsi. Ngokunyuka kwedosi, i-fluidity ye-gypsum iyanda kakhulu. Isinciphisi samanzi sePolycarboxylate sinesiphumo esibambekayo esinamandla. Ngokunyuka kwedosi, ixesha lokumisela landa kakhulu. Ngesiphumo esibambekayo esinamandla sokunciphisa amanzi epolycarboxylate, phantsi komlinganiselo ofanayo wamanzi ukuya kwisamente, ukonyuka kwedosi kunokubangela ukuguqulwa kweekristale zegypsum kunye nokukhululeka kwegypsum. Amandla e-flexural kunye noxinzelelo lwe-gypsum ayancipha ngokunyuka kwedosi.
Ii-polycarboxylate ether zokunciphisa amanzi zicotha ukusetwa kwegypsum kwaye zinciphisa amandla ayo. Kwidosi efanayo, ukongeza i-samente okanye i-calcium oxide kwi-gypsum iphucula ubumanzi bayo. Oku kunciphisa umlinganiselo wamanzi ukuya kwi-samente, kwandisa ubuninzi be-gypsum, kwaye ngaloo ndlela amandla ayo. Ngapha koko, isiphumo sokomeleza iimveliso zesamente kwi-gypsum yonyusa amandla ayo okuguquguquka kunye noxinzelelo. Ukwandisa inani le-samente kunye ne-calcium oxide kwandisa ubuninzi be-gypsum, kwaye inani elifanelekileyo le-samente linokuphucula kakhulu amandla ayo.
Xa usebenzisa i-polycarboxylate ether i-agent yokunciphisa amanzi kwi-gypsum, ukongeza isixa esifanelekileyo se-samente ayigcini nje ukwandisa amandla ayo kodwa inika umbane omkhulu kunye neempembelelo ezincinci kwixesha layo lokubeka.
Ixesha lokuposa: Aug-06-2025