Idethi yokuthunyelwe:20,Feb,2023
Iyini i-ejenti yokunciphisa amanzi?
I-ejenti yokunciphisa amanzi, eyaziwa nangokuthi i-dispersant noma i-plasticizer, iyisengezo esisetshenziswa kakhulu nesibalulekile kukhonkolo exubile elungile. Ngenxa yokukhangisa nokuhlakazeka kwayo, ukumanzisa kanye nemiphumela eshelelayo, inganciphisa kakhulu ukusetshenziswa kwamanzi kakhonkolo omusha ngokusebenza okufanayo kokusebenza ngemva kokusetshenziswa, ngaleyo ndlela ithuthukise ngokuphawulekayo amandla, ukuqina nezinye izici zikakhonkolo.
I-ejenti yokunciphisa amanzi ingahlukaniswa ngezinhlobo ezimbili ngokomphumela wayo wokunciphisa amanzi: i-ejenti evamile yokunciphisa amanzi kanye ne-ejenti yokunciphisa amanzi esebenza kahle kakhulu. I-ejenti yokunciphisa amanzi ingahlanganiswa nezinye izixube ukwenza uhlobo lwamandla okuqala, uhlobo oluvamile, uhlobo lokuhlehlisa kanye ne-air entraining uhlobo lokunciphisa amanzi ngokusho kwezidingo zobunjiniyela ekusetshenzisweni.
Ama-ejenti okunciphisa amanzi angahlukaniswa abe yi-lignosulfonate kanye nokuphuma kwayo, usawoti we-polycyclic aromatic sulfonic acid, usawoti we-resin sulfonic acid oncibilikayo, usawoti we-aliphatic sulfonic acid, ama-polyols aphezulu, usawoti we-hydroxy carboxylic acid, ama-polyol complexes, ama-polyoxyethylene ether kanye nokuphuma kwawo ngokusho kwawo. izingxenye zamakhemikhali eziyinhloko.
Iyini indlela yokusebenza yesinciphisi samanzi?
Wonke ama-ejenti okunciphisa amanzi angama-surface asebenzayo. Umphumela wokunciphisa amanzi we-ejenti yokunciphisa amanzi ubonakala ikakhulukazi ngomsebenzi ongaphezulu we-ejenti yokunciphisa amanzi. Indlela yokusebenza eyinhloko yesinciphisi samanzi imi kanje:
1) Isinciphisi samanzi sizokhangisa esixhumi esibonakalayo soketshezi oluqinile, sinciphise ukungezwani kwendawo, sithuthukise ubumanzi obungaphezulu bezinhlayiya zikasimende, sinciphise ukungazinzi kwe-thermodynamic kokuhlakazeka kukasimende, futhi ngaleyo ndlela sithole ukuzinza okulinganiselwe.
I-2) Isinciphisi samanzi sizokhiqiza i-adsorption eqondile ebusweni bezinhlayiya zikasimende, ukuze ubuso bezinhlayiya zikasimende bube necala elifanayo, okukhiqiza ukuxoshwa kwe-electrostatic, ngaleyo ndlela kubhubhise ukwakheka kwe-flocculated yezinhlayiya zikasimende kanye nokuhlakaza izinhlayiya zikasimende. Kuma-polycarboxylate kanye ne-sulfamate superplasticizers, i-adsorption ye-superplasticizer isesimweni sendandatho, intambo negiya, ngaleyo ndlela ikhulise ibanga phakathi kwezinhlayiya zikasimende ukuze kukhiqizwe ukuphindiselwa kwe-electrostatic, okubonisa ukuhlakazeka okungcono nokugcinwa kokuwohloka.
I-3) Ifilimu lamanzi elincibilikisiwe lakhiwa ngokusebenzisa inhlangano ye-hydrogen bond phakathi kokunciphisa amanzi nama-molecule amanzi ukuze kukhiqizwe ukuvikelwa kwesikhala, ukuvimbela ukuthintana okuqondile kwezinhlayiya ze-cement nokuvimbela ukwakheka kwesakhiwo esihlanganisiwe.
I-4) Njengoba ungqimba lwe-adsorption lwakhiwe ebusweni bezinhlayiya ze-cement, lungavimbela i-hydration yokuqala ye-cement, ngaleyo ndlela ikhulise umthamo wamanzi wamahhala futhi ithuthukise uketshezi lokunamathisela usimende.
5) Amanye ama-ejenti anciphisa amanzi azophinde ethule inani elithile lamabhamuza amancane ukuze anciphise ukungqubuzana phakathi kwezinhlayiya zikasimende, ngaleyo ndlela enze ngcono ukuhlakazeka nokuzinza kukasimende oludaka.
Isikhathi sokuthumela: Feb-20-2023
