Polycarboxylate Superplasticizer Wanda Baya Adsorb akan Siminti

(Polycarboxylate Superplasticizer Wanda Baya Adsorb akan Siminti)

Polycarboxylate superplasticizers wani nau'in nau'in abun da ke rage ruwa ne da ake amfani da shi don gyara danko, filastik da kaddarorin siminti. Waɗannan haɗe-haɗe suna aiki ne ta hanyar tsangwama da ke haifar da sarƙoƙin sarƙoƙi na polyether da aka dasa akan kashin baya na polyacrylic acid.

Adsorption akan siminti da steric tasirin sa yana ƙayyade aikin tarwatsawar superplasticizers, yayin da tsayin sarkar gefe ya shafe su. Dangantakar da ke tsakanin adsorption na PCE da iyawar sa an yi nazari a cikin tsarin rabon ruwa-zuwa-binder iri-iri.

Synthesis na noadsorbing PCEs: sabuwar hanya don cimma ingantacciyar tarwatsawa da haɓakawa a cikin manna siminti na alkaline

Masu bincike kwanan nan sun haɗa na'urorin polycarboxylate superplasticizers waɗanda ba sa adsorb akan siminti. Wannan yana ba da damar ƙarin toka ko toka don amfani da su a cikin cakuda azaman madadin siminti, wanda zai iya taimakawa rage farashi.

An gudanar da haɗakar da PCEs na noadsorbing ta amfani da acrylic acid da o-methoxy poly (etylene glycol) methacrylate ester azaman kayan farawa. Sannan an haɗa polycarboxylates a gaban maganin sodium hydroxide. An ƙididdige ƙarfin tarwatsawa na PCEs marasa ƙarfi ta hanyar ƙananan gwaje-gwajen slump, waɗanda aka yi bisa ga DIN EN 1015.

Bugu da ƙari, an bincika tarwatsa PCEs ta amfani da samfurin maganin pore. Sakamakon ya nuna cewa adadin adsorption na PCEs ya yi daidai da yawan adadin carboxylate da ƙwayar kwayoyin halitta, yayin da ƙwaƙƙwaran ƙwanƙwasa ya rinjayi ƙaddamarwar adsorption a hanya mai mahimmanci.

Sakamakon ya nuna cewa ƙaddamar da PCEs akan siminti ya bambanta a cikin kewayo mai yawa dangane da tsarin kwayoyin halitta da kuma tasiri mai mahimmanci na sassan gefe. Saboda haka, adsorption na PCE ya kamata a daidaita da nau'i da kaddarorin tsarin siminti.

(Polycarboxylate Superplasticizer Wanda Baya Adsorb akan Siminti)