I-Superplasticizer(I)

Idethi yokuthunyelwe: 9, Meyi, 2022

(一) Ukuzivumelanisa nezimo kwei-polycarboxylate superplasticizer kanye nezinto zikasimende:

Empeleni, kutholakale ukuthiI-Polycarboxylate Superplasticizerbanezinkinga ezisobala zokuzivumelanisa nezimo kumasimende ahlukene kanye nezinhlobo ezahlukene zezingxube zamaminerali, futhi ngezinye izikhathi zikhetha kakhulu. Ukuvumelana nezimo phakathi kukasimende kanyei-polycarboxylate superplasticizer izothonywa izici eziningi. Okufana nokuthi: izingxenye zikasimende, indawo ethile engaphezulu, okuqukethwe kwe-alkali, okuqukethwe kwe-gypsum nezinhlobonhlobo konke kunomthelela ekuvumelaneni nezimoI-Polycarboxylate Superplasticizer.

Iphuzu lokugcwala kweI-Polycarboxylate Superplasticizerngoba usimende ohlukene uhlukile, izinga lokuncishiswa kwamanzi liyancishiswa, ukuwohloka kokhonkolo kuyanda, into eyenzeka “yezinsalela zebhontshisi kabhontshisi” ibonakala lapho ukhonkolo kuntuleka udaka, nezinkinga zokopha, ukubola nokuhlukaniswa, nobunzima bokupompa. , Ngokuzwela kumthamo, ukhonkolo awukwazi ukuvulwa noma ukukhululwa ngokweqile. Ngokwesibonelo, okuqukethwei-polycarboxylate superplasticizer kuthi usimende u-A ungu-1.8% (okuqukethwe okuqinile okungu-10%) ukuze uthole isimo esanelisayo, kanti usimende u-B udinga ukuxutshwa no-2.2% ukuze uthole isimo esingcono, futhi ngezinye izikhathi uma usudlule u-2.2% % wesilinganiso, ingxube kakhonkolo. ujwayele ukopha.

Njengamanje, mayelana nokuvumelana nezimo kweI-Polycarboxylate Superplasticizer, izixazululo zimi kanje:

(1) Ngokwesisekelo sokuqinisekisa amandla kakhonkolo, ngokulungisa izinga lesihlabathi, isilinganiso sobukhulu beqoqo elimahhadla, nokwandisa inani le-slurry yesistimu kakhonkolo;

(2) Uphuzo oludakayo lukamama luhlanganiswa nama-ether lipids futhi umthamo unyuswe ngokufanelekile. Ngokuvamile, kunconywa ukuthi i-ethers ne-lipids 5: 5 ibe nomphumela ongcono, futhi umthamo kufanele ukhuphuke ngo-0.2%;

(3) Yengeza noma uguqule izingxenye zayo ngokufanelekile, sebenzisa ama-ejenti afaka umoya-mpilo njenge-SJ, i-Degussa DY, i-foam stabilizer AR, i-K12, yandise ingxenye yama-ejenti agcina ukwehla, sebenzisa i-sodium gluconate, ushukela, i-phosphate, i-ATMP, i-citric acid , isitashi esilungisiwe kanye nezinye i-retarders eziyinhlanganisela, kusetshenziswa i-soluble cellulose, i-xanthan gum, i-dextrin, i-modified i-soluble thickener, noma ukwengeza "sulphur" noma "alkali" kukhonkolo kungathuthukiswa;

(4) Shintsha ukwakheka kwamangqamuzana e-polycarboxylic acid, futhi ulungise ezinye izingxenye zenqubo yokuhlanganisa ukuze ulungise ukuguquguquka kwayo.

Ngezinto ezixubile, ithonya lomlotha wempukane ngokusobala likhulu kunalelo lempushana ye-slag. Ngokuvamile, i-fly ash yebanga lokuqala ikwazi ukuzivumelanisa nezimo, kuyilapho umlotha wempukane webanga lesibili nelesithathu ujwayele ukungahambelani, ikakhulukazi umlotha wempukane webanga lesithathu. Lapho izinga lomlotha limpofu, umphumela wokwandisa umthamo wei-polycarboxylate superplasticizerngokuhamba kwesikhathi namanje angeke kuthuthukiswe kakhulu. Isizathu esiyinhloko salesi simo ukuthi okuqukethwe kwekhabhoni kumlotha wempukane yesibili kanye nephezulu enokulahlekelwa okukhulu kokuthungela kukhudlwana, futhi umthamo wokukhangisa wezinhlayiya zekhabhoni ku-admixtures mkhulu, ngaleyo ndlela kunciphisa ukufakwa kwezingxube kusimende, okuthinta uketshezi lukakhonkolo. Uma usebenzisa i-grade III fly ash, khulisa okuqukethwe kwe-polycarboxylate water reducer ngaphezu kuka-50%, ukuze uzuze izinga lokunciphisa amanzi lapho uhlanganisa umlotha wempukane webanga lokuqala. Ebusweni bomlotha wempukane wanamuhla onekhwalithi eyinkimbinkimbi kanye nezingxenye ezahlukene, kuyadingeka ukuqinisa ukulawulwa kwekhwalithi ye-fly ash futhi uqinise ukuhlolwa lapho usebenzisa. i-polycarboxylate superplasticizer.