I-ether yeseliiya kwandisa ixesha lokuseta intlama yesamente okanye i-mortar net, ilibazise i-kinetics ye-samente hydration, eluncedo ekuphuculeni ixesha lokusebenza kwezinto ezisisiseko sesamente, iphucule ukuhambelana kunye nokuwa kwekhonkrithi emva kokulahleka, kodwa ikwanokulibazisa inkqubela phambili yokwakha, ngakumbi kwiimeko zobushushu obuphantsi zokusetyenziswa kwekhonkrithi kunye nekhonkrithi.
Ngokubanzi, okukhona umxholo we-cellulose ether uphezulu, kokukhona ixesha lokuseta i-cement slurry kunye ne-mortar liba lide, kwaye kokukhona kubonakala ngakumbi ukuba i-hydration dynamics ebambezelekileyo iyalibaziseka. I-Cellulose ether inokulibazisa i-hydration ye-clinker mineral phases ebaluleke kakhulu i-triccalcium aluminate (C3A) kunye ne-triccalcium silicate (C3S) kwi-cement, kodwa isiphumo kwi-hydration kinetics yazo asifani. I-Cellulose ether ikakhulu inciphisa izinga lokuphendula kwe-C3S kwisigaba sokukhawulezisa, ngelixa kwinkqubo ye-C3A-Caso4, ikakhulu yandisa ixesha lokungeniswa.
Uvavanyo olongezelelweyo lubonise ukuba i-cellulose ether inokuthintela ukunyibilika kwe-C3A kunye ne-C3S, ilibazise ukukristaleka kwe-hydrated calcium aluminate kunye ne-calcium hydroxide, kwaye inciphise i-nucleation kunye nesantya sokukhula kwe-CSH kumphezulu wee-particles ze-C3S, kodwa ayinampembelelo ingako kwiikristale ze-ettringite. UWeyer et al. bafumanise ukuba inqanaba lokutshintshwa kwe-DS yayiyeyona nto iphambili echaphazela ukumanziswa kwesamente, kwaye i-DS encinci yayiyeyona nto icacileyo, kokukhona ukumanziswa kwesamente okulibazisekileyo kwakubonakala. Kwindlela yokusebenza kwe-cellulose ether ukulibazisa ukumanziswa kwesamente.
USliva nabanye babekholelwa ukuba i-cellulose ether yonyusa i-viscosity yesisombululo se-pore kwaye ithintela isantya sokuhamba kwe-ion, ngaloo ndlela ilibazisa i-samente hydration. Nangona kunjalo, uPourchez nabanye bafumanise ukuba ubudlelwane phakathi kwe-cellulose ether kunye ne-cement slurry hydration kunye ne-cement slurry viscosity abuzange bubonakale. USchmitz nabanye bafumanise ukuba i-viscosity ye-cellulose ether ayinayo phantse impembelelo kwi-hydration kinetics yesamente.
UPourchez ukwafumanise ukuba i-cellulose ether yayizinzile kakhulu phantsi kweemeko ze-alkaline kwaye ukufuma kwayo okulibazisekileyo kwesamente akunakubangelwa kukubola kwayo.i-cellulose etherUkufunxwa kwesamente kusenokuba sisizathu sokwenyani sokulibaziseka kwe-cellulose ether ukufunxwa kwesamente, izongezo ezininzi zezinto eziphilayo ziya kufunxwa kwiinxalenye zesamente kunye neemveliso zokufunxwa kwesamente, zithintele ukunyibilika kweenxalenye zesamente kunye nokukristaleka kweemveliso zokufunxwa kwesamente, ngaloo ndlela kulibazisa ukufunxwa kwesamente kunye nokuxinana kwayo. UPourchcz nabanye bafumanise ukuba okukhona amandla okufunxwa kwemveliso yokufunxwa kwesamente kunye ne-cellulose ether enamandla, kokukhona ukulibaziseka kucaca ngakumbi.
Kukholelwa ngokubanzi ukuba iimolekyuli ze-cellulose ether zifunxwa kakhulu kwiimveliso zokufunxa amanzi kwaye azifunxwa rhoqo kwisigaba sokuqala seeminerali ze-clinker.
Ixesha leposi: Epreli-28-2024