Mbere yo kumenya ingano ya gypsum retarder, ni ngombwa gusuzuma ifu ya gypsumu mbisi yaguzwe. Kurugero, gerageza igihe cyambere nicyanyuma cyo gushiraho ifu ya gypsumu, gukoresha amazi asanzwe (ni ukuvuga guhuza bisanzwe), nimbaraga zo kwikuramo imbaraga. Niba bishoboka, nibyiza kugerageza ibirimo amazi ya II, igice cya kabiri cyamazi na gypsumu ya anhydrous muri poro ya gypsumu. Banza upime ibipimo byerekana ifu ya gypsumu neza, hanyuma umenye ingano ya gypsum idindiza ukurikije uburebure bwigihe cyo gutangira ifu ya gypsumu, igipimo cyifu ya gypsumu mumabuye asabwa ya gypsum nigihe cyo gukora gisabwa kuri minisiteri ya gypsumu.
Ingano ya gypsum retarder ifite byinshi ikora hamwe nifu ya gypsumu: niba igihe cyambere cyo gushiraho ifu ya gypsumu ari gito, umubare wabasubiza inyuma ugomba kuba munini; niba intangiriro yo gushiraho ifu ya gypsumu ari ndende, ingano ya retarder igomba kuba mike. Niba igipimo cyifu ya gypsumu muri minisiteri ya gypsumu ari kinini, hagomba kongerwaho retarder nyinshi, kandi niba igipimo cyifu ya gypsumu ari gito, igipimo cyifu ya gypsumu kigomba kuba gito. Niba igihe cyo gukora gikenewe kuri gypsum mortar ari kirekire, hagomba kongerwaho retarder nyinshi, bitabaye ibyo, niba igihe cyo gukora gisabwa kuri gypsum ari gito, hagomba kongerwaho abadafite ubushobozi buke. Niba igihe cyo gukora ari kirekire cyane nyuma ya gypsum mortar yongeweho hamwe na retarder, birakenewe kugabanya umubare wa gypsum retarder. Niba igihe cyo gukora ari gito, umubare wa retarder ugomba kwiyongera. Ntabwo bivuze ko kwiyongera kwa gypsum retarder bihagaze.
Gypsum imaze kwinjira mu ruganda, hagomba gufatwa ibyitegererezo byinshi kugirango bipime ibipimo bitandukanye. Nibyiza kwigana no kugerageza iminsi mike, kuko hamwe nigihe cyo kubika ifu ya gypsumu, ibipimo byayo bitandukanye nabyo birahinduka. Ikintu kigaragara cyane ni uko nyuma yifu ya gypsum ishaje mugihe gikwiye, igihe cyayo cyambere nicyanyuma cyo gushiraho nacyo kizaba kirekire. Muri iki gihe, ingano ya gypsum retarder nayo izagabanuka, bitabaye ibyo igihe cyo gukora gypsum mortar kizongerwa cyane kandi cyiyongere. Igabanya ibiciro byumusaruro mugihe bigira ingaruka kubikorwa byayo n'imbaraga zanyuma.
Kurugero, niba uguze icyiciro cya fosifogisi, igihe cyambere cyo gushiraho ni iminota 5-6, kandi umusaruro wa gypsumu iremereye nuburyo bukurikira:
Ifu ya gypsumu - 300 kg
Umusenyi wogejwe - kg 650
Ifu ya Talc - kg 50
Gypsum retarder - 0.8 kg
HPMC - 1.5 kg
Mugutangira umusaruro, hiyongereyeho kg 0.8 ya gypsum retarder, naho igihe cyo gukora gypsum minota 60-70. Nyuma, kubera impamvu zubatswe, ikibanza cyubwubatsi cyarahagaritswe kandi umusaruro urahagarara, kandi iki gice cyifu ya gypsumu cyabitswe kugirango kidakoreshwa. Igihe ikibanza cyo kubaka cyatangiraga muri Nzeri, hiyongereyeho 0.8 kg ya retarder yongeyeho igihe minisiteri ya gypsumu yongeye gukorwa. Iyi minisiteri ntiyigeze igeragezwa ku ruganda, kandi ntiyigeze ikomera nyuma y'amasaha 24 yoherejwe aho yubatswe. Ikibanza cyo kubaka cyakiriye neza. Kubera ko uruganda rwinjiye muri uru ruganda vuba aha, ntabwo yashoboye kubona impamvu, kandi yari ahangayitse cyane. Muri iki gihe, natumiriwe kujya mu ruganda rwa gypsum kugirango menye impamvu. Nyuma yo kujya ku ntambwe yambere, igihe cyambere cyo gushiraho ifu ya gypsumu cyarageragejwe, basanga igihe cyambere cyo gushiraho ifu ya gypsumu cyongerewe kuva igihe cyambere cyo gushiraho iminota 5-6 kugeza kuminota irenga 20, kandi umubare wa gypsum retarder ntabwo wagabanutse. , bityo ibintu byavuzwe haruguru bibaho. Nyuma yo guhindurwa, igipimo cya gypsum retarder cyaragabanutse kugera kuri kg 0.2, kandi igihe cyo gukora gypsum ya minisiteri cyaragabanijwe kugera ku minota 60-70, cyuzuza ahazubakwa.
Byongeye kandi, igipimo cyinyongera zinyuranye muri gypsum mortar kigomba kuba gifite ishingiro. Kurugero, igihe cyo gukora gypsum mortar ni iminota 70, kandi hiyongereyeho urugero rwiza rwa gypsum. Mu byukuri, niba hongewemo minisiteri nkeya ya gypsumu, igipimo cyo gufata amazi ni gito, kandi igihe cyo gufata amazi kiri munsi yiminota 70, bigatuma ubuso bwa minisiteri ya gypsumu butakaza amazi vuba, ubuso bwumye, no kugabanuka kwa gypsum mortar ntabwo ihuye. Muri iki gihe, gypsum mortar izabura amazi. kumeneka.
Gypsum ebyiri zo gukora plaque zirasabwa hepfo:
1. Amashanyarazi aremereye ya gypsumu
Ifu ya gypsumu (igihe cyo gutangira iminota 5-6) - 300 kg
Umusenyi wogejwe - kg 650
Ifu ya Talc - kg 50
Gypsum retarder - 0.8 kg
Cellulose ether HPMC(80.000-100.000 cps) —1.5kg
Thixotropic lubricant - 0.5 kg
Igihe cyo gukora ni iminota 60-70, igipimo cyo gufata amazi ni 96%, naho igipimo cy’amazi mu gihugu ni 75%
2 .ibikoresho byoroshye bya gypsum plaster
Ifu ya Gypsumu (igihe cyo gutangira iminota 5-6) - 850 kg
Umusenyi wogejwe - kg 100
Ifu ya Talc - kg 50
Gypsum retarder - 1.5 kg
Cellulose ether HPMC (40.000-60.000) —2.5 kg
Thixotropic lubricant - kg 1
Amasaro ya Vitrified - 1 cubic
Igihe cyo kohereza: Ukuboza-08-2022