Idethi Yokuthumela: 13 Jun, 2022
Ama-Admixtures abhekisela ekilasini lezinto ezingathuthukisa ngempumelelo indawo eyodwa noma eziningi zikakhonkolo. Okuqukethwe kwakho ngokuvamile kubala kuphela ngaphansi kuka-5% wokuqukethwe usimende, kodwa kungathuthukisa kakhulu ukusebenza, amandla, ukuqina kukakhonkolo noma ukulungisa isikhathi sokusetha futhi yonge usimende.
1. Ukuhlelwa kwezixube:
Izingxube zikakhonkolo ngokuvamile zihlukaniswa ngokwemisebenzi yazo eyinhloko:
a. Izingxube zokuthuthukisa izakhiwo ze-rheological zikakhonkolo. Kukhona ikakhulukazi i-ejenti yokunciphisa amanzi, i-ejenti efaka umoya, i-ejenti yokumpompa nokunye.
b. Izixube zokulungisa isilungiselelo kanye nezakhiwo eziqinile zikakhonkolo. Kukhona ikakhulukazi ama-retarder, ama-accelerator, ama-ejenti wamandla angaphambi kwesikhathi, njll.
c. Izingxube zokulungisa okuqukethwe komoya kakhonkolo. Kukhona ikakhulukazi ama-air-entraining agents, ama-air-entraining agents, ama-foaming agents, njll.
d. Izingxube zokuthuthukisa ukuqina kokhonkolo. Kukhona ikakhulukazi ama-air-entraining agents, ama-agent avimbela amanzi, ama-rust inhibitors nokunye.
e. Izixube ezihlinzeka ngezakhiwo ezikhethekile zekhonkrithi. Kukhona ikakhulukazi i-antifreeze, i-ejenti yokwandisa, i-colorant, i-ejenti yokungenisa umoya kanye ne-ejenti yokumpompa.
2. Ama-superplasticizer asetshenziswa kakhulu
I-ejenti yokunciphisa amanzi ibhekisela ekuhlanganiseni okunganciphisa ukusetshenziswa kwamanzi okuxutshwa ngaphansi kwesimo esifanayo sokuwa kokhonkolo; noma ingakhuphula ukuwohloka kokhonkolo lapho isilinganiso sokuxuba ukhonkolo kanye nokusetshenziswa kwamanzi kuhlala kungashintshile. Ngokusho kobukhulu bezinga lokunciphisa amanzi noma ukwanda kokuwohloka, kuhlukaniswe izigaba ezimbili: i-ejenti evamile yokunciphisa amanzi kanye ne-ejenti yokunciphisa amanzi esebenza kahle kakhulu.
Ngaphezu kwalokho, kukhona ama-ejenti okunciphisa amanzi ahlanganisiwe, njengama-ejenti okunciphisa amanzi afaka umoya, anemiphumela yokunciphisa amanzi kanye ne-air-entraining; ama-ejenti okunciphisa amanzi okuqala anemiphumela yokunciphisa amanzi kanye nemiphumela yokuthuthukisa amandla okuqala; I-ejenti yokunciphisa amanzi, nayo inomsebenzi wokubambezela isikhathi sokusetha nokunye.
Umsebenzi oyinhloko wokunciphisa amanzi:
a. Thuthukisa kakhulu uketshezi ngesilinganiso esifanayo sokuxuba.
b. Lapho umthamo we-fluidity nosimende ungashintshiwe, nciphisa ukusetshenziswa kwamanzi, wehlise isilinganiso sikasimende wamanzi, futhi wandise amandla.
c. Lapho uketshezi namandla kuhlala kungashintshile, ukusetshenziswa kukasimende kugcinwa futhi izindleko ziyancipha.
d. Thuthukisa ukusebenza kokhonkolo
e. Thuthukisa ukuqina kukakhonkolo
f. Lungiselela ukhonkolo wamandla aphezulu nokusebenza okuphezulu.
Uchungechunge lwe-Polysulfonate: okuhlanganisa i-naphthalene sulfonate formaldehyde condensate (NSF), melamine sulfonate formaldehyde polycondensate (MSF), p-aminobenzene sulfonate formaldehyde polycondensate, modified lignin sulfonate, polystyrene Sulfonates kanye ne-sulfonated rescond, i-aldehyde ye-aldehyde esetshenziswa njll. I-naphthalene sulfonate formaldehyde condensate.
Uchungechunge lwe-Polycarboxylate: lawula ngempumelelo inqubo yokuqala ye-hydration futhi wehlise ukulahleka kokuwohloka kukakhonkolo.
Umehluko phakathi kwe-ejenti yokunciphisa amanzi esebenza kahle kakhulu kanye ne-ejenti evamile yokunciphisa amanzi ibonakala kakhulu ngokuthi i-ejenti yokunciphisa amanzi esebenza kahle kakhulu ingaqhubeka nokwandisa uketshezi ebangeni elikhulu, noma inciphise ngokuqhubekayo isidingo samanzi. Uhlu olusebenzayo lwezinciphisi zamanzi ezijwayelekile luncane.
Umphumela we-superplasticizer kumthamo omncane awukwazi ukusetshenziswa njengesisekelo sokwahlulela ukusebenza kwe-superplasticizer. Lokhu kufanele kucatshangelwe lapho ukhetha isinciphisi samanzi. Umthamo omkhulu we-superplasticizer kufanele unqunywe ngokuhlolwa, futhi akufanele usetshenziswe kuphela ngokuya ngomthamo womkhiqizi we-superplasticizer.
Isikhathi sokuthumela: Jun-13-2022
