Idethi Yokuthumela: 12, Aug, 2024
1. I-ejenti yokunciphisa amanzi esekelwe ku-polycarboxylic acid esezingeni eliphezulu ihlukile kune-naphthalene esekelwe ekusebenzeni okuphezulu komenzeli wokunciphisa amanzi kulokho:
Esokuqala ukuhlukahluka kanye nokuguquguquka kwesakhiwo samangqamuzana; okwesibili ukuqhubekela phambili nokugxilisa ingqondo nokuthuthukisa izinzuzo zama-ejenti okunciphisa amanzi asebenza kahle kakhulu, futhi kuzuzwe izinqubo zokukhiqiza eziluhlaza nokungangcolisi.
Kusuka kumshini wokusebenza, ukwakheka kwamangqamuzana e-ejenti yokunciphisa amanzi ye-polycarboxylic acid kumise okwekama. Iqembu eliqinile le-anionic ye-polar "anchoring" echungechungeni eliyinhloko lisetshenziselwa ukukhangisa ezinhlayiyeni zikasimende. Ikama eliphumela ngaphandle lisekelwa amaketanga amagatsha amaningi. Isakhiwo sezinyo sinikeza umphumela wokuhlelwa kwendawo owanele wokuhlakazeka okwengeziwe kwezinhlayiya zikasimende. Uma kuqhathaniswa nokunyanyiswa kukagesi kwengqimba kagesi ephindwe kabili ye-naphthalene-based reduction agents, isithiyo se-steric sigcina ukuhlakazeka isikhathi eside.
Ngokushintsha ngokufanelekile ukwakheka kwekama kwe-ejenti yokunciphisa amanzi ye-polycarboxylate futhi ngokushintsha ngokufanelekile ukuminyana nobude bamaketango asemaceleni, i-ejenti yokunciphisa amanzi ephezulu futhi enamandla asekuqaleni enciphisa amanzi efanele izingxenye ezakhiwe ngaphambili ingatholakala.
Ama-ejenti okunciphisa amanzi asuselwa ku-Polycarboxylic acid angalungiswa futhi ashintshwe ngokuya ngezidingo ukuze kuzuzwe inhloso yokushintsha ukusebenza, kunokusebenzisa ukuhlanganisa okulula ukuze kulungiswe. Ngokusekelwe kulokhu kuqonda, kungase kusikhuthaze ukuthi sithuthukise ubuchwepheshe bethu bohlelo ngokuzayo.
2. Ukuvumelana nezimo kwama-ejenti okunciphisa amanzi asuselwa ku-polycarboxylic kuzinto zikasimende:
Izinhlobo ezihlukene zikasimende zinamaphuzu okugcwala ahluke kakhulu we-polycarboxylic acid-based superplasticizers, ngakho-ke kubaluleke kakhulu ukuthola amaphuzu okugcwala kukasimende ahlukene. Kodwa-ke, uma umsebenzisi ethi u-1.0% kuphela ovunyelwe ukuthi wengezwe, uma usimende okhethiwe ungaguquguquki kulesi silinganiso, kuyoba nzima kumhlinzeki we-admixture ukuyiphatha, futhi indlela yokuhlanganisa ngokuvamile inomthelela omncane.
Umlotha wezinga lokuqala unokuguquguquka okuhle, kuyilapho umlotha wezinga lesibili kanye nelesithathu ngokuvamile awufanelekile. Ngalesi sikhathi, ngisho noma inani le-polycarboxylic acid likhuphuka, umphumela awubonakali. Ngokuvamile lapho uhlobo oluthile lukasimende noma umlotha wempukane ungavumelani nezimo ezixubene, futhi ungakaneliseki ngokuphelele lapho ushintshela kwenye ingxubevange, ekugcineni kungase kudingeke ukuthi ushintshe izinto zikasimende.
3.Inkinga yodaka esihlabathini:
Uma okuqukethwe kodaka esihlabathini kuphezulu, izinga lokunciphisa amanzi le-ejenti yokunciphisa amanzi esekelwe ku-polycarboxylate lizoncishiswa kakhulu. Ukusetshenziswa kwama-ejenti okunciphisa amanzi asekelwe ku-naphthalene kuvame ukuxazululwa ngokwandisa umthamo, kuyilapho ama-ejenti okunciphisa amanzi asekelwe ku-polycarboxylic acid awashintshi kakhulu lapho umthamo unyuswa. Ezimweni eziningi, lapho uketshezi lungakafiki ezingeni elidingekayo, ukhonkolo usuqalile ukuphuma. Ngalesi sikhathi, umphumela wesilinganiso sokulungiswa kwesihlabathi, ukwandisa okuqukethwe komoya noma ukungeza ukuqina ngeke kube kuhle kakhulu. Indlela engcono kakhulu ukunciphisa udaka.
Isikhathi sokuthumela: Aug-12-2024
