Surfactant yog ib yam khoom uas tau hloov pauv ntau (feem ntau txo qis) qhov nro ntawm cov kua lossis qhov cuam tshuam ntawm ob theem, thiab nws cov qauv ntawm ob feem: hydrophilic pab pawg thiab hydrophobic pawg.Thaum lub surfactant ntxiv rau hauv cov kua aqueous, cov pab pawg hydrophilic nyob rau hauv cov txheej txheem molecule taw rau qhov kev daws teeb meem, thiab cov pab pawg hydrophobic taw rau cov huab cua, cov khoom ua kua lossis tsis ncau cov kua thiab ua rau cov kev taw qhia teeb tsa, ua rau cov yeeb yaj kiab directional adsorption thiab txo qhov nro ntawm dej thiab cuam tshuam ntawm ob theem. .Surface yam ua tau pom muaj kua.
Thaum dej slurry tom qab ntxiv polycarboxylate superplasticizer, hydrophobic pawg ntawm cov poly (carboxylic acid dej txo tus neeg sawv cev molecules adsorbed nyob rau saum npoo ntawm cement hais, qhov taw qhia hydrophilic radical aqueous tov, tsim ib qho qauv ntawm cov roj hauv qhov chaw ntawm cov xau lossis cov yeeb yaj kiab multimolecular adsorption) nyob rau hauv tus ntawm hluav taws xob repulsion, ua Ameslikas cov cement tom qab ntxiv dej vim muaj ntau yam xws li molecular cohesion ntawm cement particles tsim flocculation qauv qhib, qhov khi tau tso dej dawb hauv cov qauv ntawm flocculation, uas yog tsim los ntawm poly carboxylic acid molecular. adsorption jianshuiji dispersion effect.Tom qab ntxiv dej rau hauv cov cement, cement qhov dej yog ntub los ntawm dej. Qhov zoo dua ntawm qhov ntub dej, qhov dej tsawg yuav tsum sib xyaw nrog kev ua tau zoo ib yam, thiab qhov nrawm dej hydration ntawm MAAs.When surfactant tam sim no , sab saum npoo tsis sib haum ntawm dej thiab cuam tshuam interfacial nruab nrab ntawm dej thiab cov nplais ua kom muaj qhov txo qis, uas ua rau cov nplais ua kom yooj yim los ua kom ntub thiab ua kom lub cev tau dej zoo.Thaum tib lub sijhawm, cov txheej txheem ntawm cov polycarboxylate superplasticizer tau tshaj tawm cov nplais ntawm cov nplais cement, thiab cov pab pawg hydrophilic taw tes rau cov kua aqueous, uas thickens solvated txheej nyob rau saum npoo ntawm cov cement hais, nce lub peev xwm swb ntawm cov nplais pob zeb, thiab ua lub luag haujlwm lubricating.Yog hais tias cov huab cua-entraining polycarboxylate superplasticizer, cov nyhuv lubrication yog pom tseeb dua.
