Gypsum Retarders

I-gypsum retarder yikhemikhali eyongeziweyo esetyenziswa kwishishini lokwakha ukucothisa ixesha lokumisela izinto ezisekelwe kwi-gypsum, ezifana ne-plaster okanye i-gypsum cement.Iiretaretha zeGypsum zibalulekile kwizicelo zolwakhiwo apho ukusebenza okwandisiweyo okanye ixesha lokuseta lifuneka ukuze kuqinisekiswe ukuxutywa okufanelekileyo, ukusetyenziswa, kunye nokugqitywa kweemveliso zegypsum.

Umsebenzi weGypsum Retarders:

Umsebenzi ophambili we-gypsum retarders kukulibazisa inkqubo yokumisela izinto ezisekelwe kwi-gypsum ngokulawula ukuphendula kwe-hydration yegypsum.I-Gypsum, iminerali eyenzeka ngokwemvelo eyenziwe nge-calcium sulfate dihydrate (CaSO4 · 2H2O), ifumana i-chemical reaction ngamanzi ukuze yenze i-gypsum plaster okanye i-gypsum cement.Le mpendulo, eyaziwa ngokuba yi-hydration, ibandakanya ukuchithwa kweekristale ze-gypsum ezilandelwa ukuphinda kufakwe i-crystallization, ekhokelela ekubeni lukhuni okanye ukusetwa kwezinto.

Ngokuzisa iikhompawundi ezithile zeekhemikhali njenge-retarders, inkqubo ye-hydration iyancipha, ngaloo ndlela yandisa ixesha lokusebenza kweemveliso ezisekelwe kwi-gypsum.Oku kusebenza kwandisiweyo kuvumela abasebenzi bokwakha ixesha elingakumbi lokuxuba, ukugalela, ukubumba, kunye nokugqiba, ngokukodwa kwiimeko apho iindawo ezinkulu kufuneka zigutyungelwe okanye iinkcukacha ezintsonkothileyo kufuneka zifezekiswe.

Iindidi zeGypsum Retarders:

Iindidi ezininzi zeekhemikhali zinokusebenza njenge-gypsum retarders, nganye inendlela yayo yokusebenza.Iindidi eziqhelekileyo ze-gypsum retarders ziquka:

1. I-Organic acids: Ii-asidi ezithile ze-organic, ezifana ne-citric acid okanye i-asidi ye-tartaric, zinokuhlehlisa ngokufanelekileyo ukusetwa kwe-gypsum ngokudibanisa ne-calcium ion, eziyimfuneko kwi-gypsum hydration.Le mpendulo yobunzima ithoba isantya sokunyibilika kwegypsum kunye nemvula, ngaloo ndlela ilibazisa inkqubo yokumisela.
2. I-Phosphates: I-Phosphates, kuquka i-sodium phosphate okanye i-potassium phosphate, inokuphinda isebenze njenge-retarders ngokwenza iikhompawundi ze-calcium phosphate ezinganyibilikiyo, ezinqanda ukuhanjiswa kweekristale zegypsum.I-Phosphates isebenza njenge-retarders esebenzayo kwiindawo eziphantsi kwaye zihlala zisetyenziselwa ukudibanisa nezinye izongezo ukufezekisa ixesha elifunekayo lokumisela.
3. I-cellulose ethers: I-ethers ethile ye-cellulose, njenge-methyl cellulose okanye i-hydroxyethyl cellulose, inokusebenza njenge-retarders ngokufaka i-molecule yamanzi emzimbeni kunye nokuthintela ukufikelela kwabo kwiincinci ze-gypsum.Lo matshini ucotha ukusabela kokufakwa kwamanzi ngokunciphisa ubukho bamanzi, ngaloo ndlela kwandiswa ixesha lokusebenza lemathiriyeli esekwe kwigypsum.
4. Ezinye izongezo: Ezinye izongezo zekhemikhali ezahlukeneyo, ezibandakanya i-lignosulfonates, igluconates, okanye iipolymers, zinokubonisa iipropathi ezibuyiswayo xa zifakwe kwi-gypsum formulations.Ezi zongezo zinokusebenzisana kunye neengqungquthela ze-gypsum okanye ziguqule iimpawu ze-rheological zomxube, ezikhokelela kwiimpawu zokumisela ukulibaziseka.

Ukusetyenziswa kweeGypsum Retarders:

I-Gypsum retarders ifumana ukusetyenziswa ngokubanzi kwiiprojekthi zokwakha apho kufuneka ukusebenza ixesha elide okanye ixesha lokumisela.Ezinye izicelo eziqhelekileyo ziquka:

1. Ukutyabeka: Kwizinto zokutyabeka, iiretareda zegypsum zivumela abatyabeki ixesha elingakumbi lokugalela kwaye balawule isamente yegypsum ezindongeni, kwiisilingi, okanye kwindawo yokuhombisa phambi kokuba ibekwe.Oku kusebenza kwandisiweyo kuluncedo ngakumbi ekufezekiseni okugudileyo okanye uyilo oluntsonkothileyo.
2. Ukubunjwa kunye noKubunjwa: Iiretarders zeGypsum zisetyenziselwa ukuveliswa kwe-gypsum-based molds, i-casts, kunye nezinto zokwakha, apho ukubunjwa okuchanekileyo kunye neenkcukacha ziyimfuneko.Ngokucotha ixesha lokumisela, abavelisi banokuqinisekisa ukuzaliswa okufanayo kwee-molds kunye nokuthintela ukuqina kwangaphambili ngexesha lemisebenzi yokuphosa.
3. Ukuzaliswa okuHlangeneyo koLwakhiwo: Kumalungu okwakha okanye izikhewu phakathi kweepaneli ze-gypsum okanye iibhodi, ii-retarders zongezwa kwi-gypsum joint compounds ukukhusela ukoma kwangaphambili kunye nokuqhekeka.Oku kuvumela ukuhlanganiswa okungenamthungo kweepaneli ze-gypsum kunye nokuqinisekisa ukuhlala ixesha elide, amajoyina angena-crack ngokuhamba kwexesha.
4. Usetyenziso oluKhethekileyo: Iiretaretha zeGypsum zisenokusetyenziswa kwizicelo ezikhethekileyo, ezinje ngokwenziwa kwezinto ezincamathelayo ezisekwe kwigypsum, iigrouts, okanye iicolwaniso ezenziweyo, apho ixesha elivulekileyo elongeziweyo okanye ixesha lokuseta lifunwa ukuze kwenziwe umsebenzi oncomekayo.

Iingqwalasela kunye noLumkelo:

Ngelixa i-gypsum retarders ibonelela ngeenzuzo ezininzi kwizicelo zokwakha, idosi efanelekileyo kunye nokuhambelana nezinye izongezo kufuneka ziqwalaselwe ngononophelo ukunqanda iziphumo ezibi ekusebenzeni kwemveliso.Ukusetyenziswa ngokugqithisileyo kweeretarders kunokukhokelela kwixesha elide kakhulu lokumisela okanye ukuphazamisa iimpawu zomatshini wemathiriyeli esekwe kwigypsum.Ukongeza, abavelisi kunye neekontraka kufuneka balandele izikhokelo ezicetyiswayo kunye namanyathelo okhuseleko xa bephethe kwaye befaka i-gypsum retarders ukuqinisekisa ukhuseleko lwabasebenzi kunye nomgangatho wemveliso.

Ukuqukumbela, i-gypsum retarders idlala indima ebalulekileyo kwishishini lokwakha ngokwandisa ixesha lokusebenza kunye nokumisela ixesha lezinto ezisekelwe kwi-gypsum.Enoba zisetyenziselwa ukutyabeka, ukuxonxa, ukuzaliswa ngokudibeneyo, okanye ezinye izinto, iingcibi zinceda iingcali zokwakha ukuba zifezekise izinto ezinqwenelekayo, iimilo kunye nesakhiwo esifanelekileyo.Ngokuqonda imisebenzi, iintlobo, kunye nokusetyenziswa kwe-gypsum retarders, abachaphazelekayo banokusebenzisa ngokusebenzayo ezi zongezo ukwenza iinkqubo zokwakha kunye nokuphucula iziphumo zeprojekthi.