Idethi yokuthunyelwe:11, Sep,2023

Kusukela ngeminyaka yawo-1980, izixube, ikakhulukazi ama-ejenti anciphisa amanzi asebenza kahle kakhulu, ziye zathuthukiswa kancane kancane futhi zasetshenziswa emakethe kakhonkolo yasekhaya, ikakhulukazi kukhonkolo enamandla amakhulu kanye nokhonkolo ompontshwayo, futhi seziphenduke izingxenye ezibalulekile. Njengoba uMalhotra aphawula eNgqungqutheleni Yokuqala Yezizwe Ngezizwe Yezinto Ezixubile Kakhonkolo: “Ukuthuthukiswa kanye nokusetshenziswa kwama-ejenti anciphisa amanzi asebenza ngempumelelo kuyingqopha-mlando ekuqhubekeleni phambili kobuchwepheshe obuphathekayo ekhulwini lama-20.” Kwakukhona ukuphumelela okumbalwa okubalulekile kwezobuchwepheshe obuphathekayo phakathi neminyaka edlule, enye yazo kwaba ukuthuthukiswa komoya ogxilile ngawo-1940, okwashintsha ubuso bobuchwepheshe obukhonkolo eNyakatho Melika;I-Superplasticizerkungenye impumelelo enkulu ezoba nomthelela omkhulu ekukhiqizeni nasekusetshenzisweni kukakhonkolo eminyakeni eminingi ezayo.

I-Superplasticizerkwamanye amazwe kuthiwai-superplasticizer, njengoba igama liphakamisa, lifaneleka kakhulu ukulungiswa kwengxube yekhonkrithi ye-superplasticized. Yiqiniso, ifaneleka kakhulu ukuxuba izingxube ngokugeleza okukhulu, umthamo omkhulu we-slurry kanye nesilinganiso esiphansi se-water-binder, okungukuthi, ukupompa ukhonkolo wamandla aphezulu.

Kodwa-ke, komunye ukhonkolo, njengokhonkolo othululwe ekwakhiweni kwedamu elidonsa amanzi, ubukhulu bezinhlayiyana ze-aggregate bukhulu (kufika ku-150mm), umthamo we-slurry mncane futhi ukugeleza akukukhulu, futhi ukhonkolo udinga ukuhlanganisa. ngokusebenzisa ukudlidliza okuqinile noma isenzo sokudlidliza, isinciphisi samanzi esisebenza kahle kakhulu singase singafaneleki. Ukuze kugcinwe isilinganiso se-water-binder singaguquki, ukuze kuhlangatshezwane nemingcele yezakhiwo zemishini edingwa ukwakheka kwesakhiwo, kuncishiswe ukusetshenziswa kwamanzi, futhi kuncishiswe izinto zikasimende njengombono, ukwakhiwa kwamadamu amaningi afuywa nge-hydraulic nakho kuhlanganiswe nokusebenza kahle okuphezulu. isinciphisi samanzi. Eqinisweni, isicelo esinjalo siyinkinga, ngoba ukhonkolo wangaphambili we-hydraulic uxubene ne-ejenti yokungenisa umoya noma uhlobo lwe-lignin lwesinciphisi samanzi esivamile, izinga labo lokunciphisa amanzi lincane, futhi ngenxa yomphumela wokungena komoya, ukwandisa umthamo we-slurry, ngakho-ke. lapho ukusetshenziswa kwamanzi kanye nenani le-cementing material liyancipha ngesikhathi esifanayo, okungukuthi, lapho umthamo we-slurry uncishisiwe, ungagcina ibhalansi enzima. Ukuqinisekisa ukuthi kunesikhala esanele sokugcwalisa i-aggregate, ukugoqa i-aggregate futhi unikeze i-slurry esebenzayo kuyadingeka ukuze ingxube ihlanganiswe ngemva kokuthululwa.

Ngaphezu kwalokho, amandla acindezelayo enhlanganisela ene-ejenti yokunciphisa amanzi esebenza kahle kakhulu ukuze kuncishiswe isilinganiso se-binder yamanzi angathuthukiswa kakhulu ngemva kokuqina, kodwa izinga lokukhula kwamandla okugoba ngokuvamile lincane, futhi ukuzwela kokuqhekeka kuzokwanda, ngakho-ke ngokuvamile, ukwakhiwa kwendawo egandaywe ngokhonkolo noma iphaneli yebhuloho kufanele kuqaphe nge-ejenti yokunciphisa amanzi esebenza kahle kakhulu. Eqinisweni, ekulungiseni inani elikhulu kunawo wonke le-C30 kwezokwakha kanye nobunjiniyela bomphakathi (kufanele kube ngaphezu kwe-1/2 yenani eliphelele) noma amanye amamaki aphansi wamandla kakhonkolo ompontshwayo, isinciphisi samanzi esisebenza kahle kakhulu asifanele, noma akuyona ingxenye ebalulekile.