Matsakaicin nauyin kwayoyin halitta na polymer yana da tasiri mai mahimmanci akan rarraba siminti.Saboda polycarboxylate superplasticizers su ne anionic surfactants kuma sun ƙunshi babban adadin carboxyl hydrophilic kungiyoyin, idan zumunta na kwayoyin nauyi ne da girma, da polymer dispersibility zai zama matalauta.Idan ma'aunin ƙwayoyin dangi ya yi ƙanƙanta, ikon polymer don kula da slump ba shi da yawa.Lokacin da nauyin kwayoyin dangi ya yi girma, ba kawai sauƙi ba ne don haifar da coagulation, wanda zai haifar da karuwa da danko na simintin siminti, amma kuma yana kare ƙungiyoyi masu aiki a kan babban sarkar da ke taka rawa wajen rage ruwa, irin wannan. kamar yadda ƙungiyoyin carboxyl, ƙungiyoyin acid sulfonic, da sauransu, wanda ke haifar da raguwar rarraba siminti.
Ta hanyar gwaje-gwaje, an yi imanin cewa rage yawan ruwa na polymer ya fara karuwa tare da karuwar nauyin kwayoyin halitta, sa'an nan kuma ya ragu bayan ya kai wani ƙima.A cikin wannan gwaji, an yi amfani da hanyar polymerization guda ɗaya da kayan albarkatun ƙasa iri ɗaya, an sarrafa adadin mai sarrafawa, kuma an shirya abubuwan rage ruwa na polycarboxylate tare da ma'auni daban-daban, bisa ga GB / T 8077-2000 don bincika tasirin tasirin daban-daban. ma'aunin kwayoyin akan aikin aikace-aikacen samfurin.Kamar yadda aka nuna a kasa
Kamar yadda aka nuna a cikin hoton da ke sama, yawan ruwa na man siminti tare da ƙananan nauyin kwayoyin halitta yana ƙaruwa, yana nuna cewa ƙananan nauyin kwayoyin halitta yana da kyawawa mai kyau.A tsakanin 13000 da 19000 na nauyin kwayoyin halitta, farkon slurry fluidity da ruwa tare da lokaci suna raguwa kadan, amma lokacin da nauyin kwayoyin ya karu zuwa 21,000, asarar ruwa na slurry yana karuwa da lokaci.Wannan yana nuna cewa rarrabuwar simintin siminti ta hanyar polycarboxylate superplasticizer yana raguwa tare da haɓakar nauyin ƙwayoyin cuta.Yin la'akari da bayanan rage yawan ruwa, lokacin da nauyin kwayoyin halitta na polycarboxylate superplasticizer ya kasance tsakanin 13,000 da 15,000, yawan raguwar ruwa na wakili mai rage ruwa ba shi da bambanci sosai.Lokacin da nauyin kwayoyin halitta ya wuce 19,000, ƙimar rage ruwa yana da yanayin ƙasa a bayyane.Ana iya ganin cewa polycarboxylic acid uwar barasa tare da nauyin kwayoyin da aka sarrafa a ƙasa da 15,000 yana da kyau rarrabawa, babban raguwar ruwa da ƙananan hasara a kan lokaci.
Lokacin aikawa: Nuwamba 18-2022