Ngaphambi kokumisela inani le-gypsum retarder, kuyimfuneko ukuvavanya i-powder eluhlaza ye-gypsum ethengiweyo.Ngokomzekelo, vavanya ixesha lokuqala kunye nelokugqibela lokumisela i-gypsum powder, ukusetyenziswa kwamanzi okusemgangathweni (oko kukuthi, ukuhambelana okusemgangathweni), kunye namandla okunyamezela.Ukuba kunokwenzeka, kungcono ukuvavanya umxholo we-II yamanzi, i-semi-water kunye ne-anhydrous gypsum kwi-gypsum powder.Okokuqala ukulinganisa izibonakaliso ze-gypsum powder ngokuchanekileyo, kwaye emva koko unqume inani le-gypsum retarder ngokobude bexesha lokuqala lokumisela i-gypsum powder, umlinganiselo we-gypsum powder kwi-gypsum mortar efunekayo kunye nexesha lokusebenza elifunekayo kwi-gypsum mortar.
Umthamo we-gypsum retarder unento eninzi yokwenza i-gypsum powder: ukuba ixesha lokuqala lokumisela i-gypsum powder lifutshane, inani le-retarder kufuneka libe likhulu;ukuba ixesha lokuqala lokumisela i-gypsum powder lide, inani le-retarder kufuneka libe lincinci.Ukuba umlinganiselo we-gypsum powder kwi-gypsum mortar inkulu, i-retarder engaphezulu kufuneka yongezwe, kwaye ukuba umlinganiselo we-gypsum powder uncinci, umlinganiselo we-gypsum powder kufuneka ube ngaphantsi.Ukuba ixesha lokusebenza elifunekayo kwi-gypsum mortar lide, i-retarder engaphezulu kufuneka yongezwe, kungenjalo, ukuba ixesha lokusebenza elifunekayo kwi-gypsum mortar lifutshane, i-retarder encinci kufuneka yongezwe.Ukuba ixesha lokusebenza lide kakhulu emva kokuba i-gypsum mortar ifakwe kunye ne-retarder, kuyimfuneko ukunciphisa inani le-gypsum retarder.Ukuba ixesha lokusebenza lifutshane, inani le-retarder kufuneka linyuswe.Akunakutsho ukuba ukongezwa kwe-gypsum retarder i-static.
Emva kokuba i-gypsum ingene kumzi-mveliso, iisampuli ezininzi kufuneka zithathwe ukuvavanya izikhombisi zayo ezahlukeneyo.Kungcono ukwenza isampuli kunye nokuvavanya zonke iintsuku ezimbalwa, kuba ngexesha lokugcina i-gypsum powder, izikhombisi zayo ezahlukeneyo ziyatshintsha.Eyona nto icacileyo kukuba emva kokuba i-gypsum powder igugile ixesha elifanelekileyo, ixesha layo lokuqala kunye nelokugqibela lokumisela nalo liya kwandiswa.Ngeli xesha, inani le-gypsum retarder liya kuncitshiswa, ngaphandle koko ixesha lokusebenza le-gypsum mortar liya kwandiswa kakhulu kwaye linyuke.Inciphisa iindleko zemveliso ngelixa ichaphazela ukusebenza kwayo kunye namandla okugqibela.
Ngokomzekelo, ukuba uthenge ibhetshi ye-phosphogypsum, ixesha lokuqala lokumisela yimizuzu emi-5-6, kunye nokuveliswa kodaka olunzima lwe-gypsum lulandelayo:
Umgubo weGypsum - 300 kg
Isanti ehlanjwe - 650 kg
Umgubo weTalc - 50 kg
I-Gypsum retarder - 0.8 kg
I-HPMC - 1.5 kg
Ekuqaleni kwemveliso, i-0.8 kg ye-gypsum retarder yongezwa, kwaye ixesha lokusebenza kwe-gypsum mortar kwakuyimizuzu engama-60-70.Kamva, ngenxa yezizathu ezikwisiza sokwakha, indawo yokwakha yavalwa kwaza kwamiswa imveliso, yaye le bhetshi yomgubo wegypsum iye yagcinwa ukuze ingasetyenziswa.Xa isiza sokwakha saqalisa kwakhona ngoSeptemba, ukongezwa kwe-0.8 kg ye-retarder kwakusadityaniswa xa udaka lwegypsum lwaluveliswa kwakhona.Udaka aluzange luvavanywe kumzi-mveliso, yaye aluzange luqine kwiiyure ezingama-24 emva kokuba luthunyelwe kwindawo yokwakha.Isiza sokwakha sasabela ngamandla.Ekubeni umenzi wangena kweli shishini kungekudala, akazange afumane isizathu, kwaye wayenexhala kakhulu.Ngeli xesha, ndamenywa ukuba ndiye kumenzi wodaka lwegypsum ukuze ndifumanise isizathu.Emva kokuya kwisinyathelo sokuqala, ixesha lokuqala lokumisela i-gypsum powder lihlolwe, kwaye kwafunyaniswa ukuba ixesha lokuqala lokumisela i-gypsum powder landiswa ukusuka kwixesha lokuqala lokumisela le-5-6 imizuzu ukuya kwimizuzu engama-20. kwaye isixa se-gypsum retarder asizange sincitshiswe., ngoko le nto ingasentla iyenzeka.Emva kohlengahlengiso, i-dosage ye-gypsum retarder yancitshiswa yaba yi-0.2 kg, kwaye ixesha lokusebenza kwe-gypsum mortar lancitshiswa libe yimizuzu engama-60-70, eyanelisa indawo yokwakha.
Ukongezelela, umlinganiselo wezongezo ezahlukeneyo kwi-gypsum mortar kufuneka ube nengqiqo.Ngokomzekelo, ixesha lokusebenza kwe-gypsum mortar yimizuzu engama-70, kwaye inani elifanelekileyo le-gypsum retarder liyongezwa.Ngokuchanekileyo, ukuba i-gypsum mortar encinci iyongezwa, izinga lokugcinwa kwamanzi liphantsi, kwaye ixesha lokugcinwa kwamanzi lingaphantsi kwemizuzu engama-70, okubangela ukuba umphezulu we-gypsum mortar ulahlekelwe ngamanzi ngokukhawuleza, umphezulu womile, kunye nokuncipha kwamanzi. udaka lwegypsum aluhambelani.Ngeli xesha, i-gypsum mortar iya kulahlekelwa ngamanzi.ukuqhekeka.
Iindlela ezimbini zokwenziwa kwe-gypsum plaster ziyacetyiswa ngezantsi:
1. ifomula yodaka lwe-gypsum enzima
I-Gypsum powder (ixesha lokuqala lokumisela imizuzu emi-5-6) - 300 kg
Isanti ehlanjiweyo - 650 kg
Umgubo weTalc - 50 kg
I-Gypsum retarder - 0.8 kg
Iselulosi ether HPMC(80,000-100,000 cps)—1.5kg
I-lubricant Thixotropic - 0.5 kg
Ixesha lokusebenza yimizuzu engama-60-70, izinga lokugcinwa kwamanzi li-96%, kwaye izinga lokugcinwa kwamanzi likazwelonke liyi-75%.
2 .ifomula yodaka lwe-gypsum elula
I-Gypsum powder (ixesha lokuqala lokumisela imizuzu emi-5-6) - 850 kg
Isanti ehlanjiweyo - 100 kg
Umgubo weTalc - 50 kg
I-Gypsum retarder - 1.5 kg
I-Cellulose ether HPMC (40,000-60,000)—2.5 kg
I-lubricant Thixotropic - 1 kg
Amaso e-Vitrified - 1 cubic
Ixesha lokuposa: Dec-08-2022