Nyob zoo Early Concrete Additive

Ib theem variant ntawm gypsum

Muaj ntau qhov kev hloov pauv ntawm gypsum vim hloov pauv cov xwm txheej sab nraud thiab qhov sib txawv ntawm kev qhia txog impurities. Yog li ntawd, gypsum khoom nyob rau hauv industrial ntau lawm feem ntau yog ib tug sib tov ntawm ntau variations. - Gypsum muaj ob hydrous gypsum (D) - Caso4-2H20, ob hydrous gypsum (H) - Caso4-2H20 ( faib ua hom a thiab hom), hom III anhydrous gypsum (A II) - CaSO4a thiab hom, hom II anhydrous gypsum (A II) - CaSO4 thiab I anhydrous gypsum (AI) thiab lwm yam. 5 theem xeev thiab 7 variants

. Dihydrous gypsum hloov mus rau hemihydrous gypsum los ntawm lub cev qhuav dej, thiab tom qab ntawd mus rau anhydrous gypsum (CaSO4) los ntawm lub cev qhuav dej ntxiv. Ntawm qhov tsis sib xws, anhydrous calcium sulfate yuav tshwm sim nrog kev hloov ntawm ib puag ncig ib puag ncig xws li kub, siab, dej thiab dej tshuaj tiv thaiv rau hauv ib nrab - hydrous pob zeb suab (CaSO4-1/2H2O) thiab _ dihydrous gypsum. (CaS04-2H2O). Nyob rau hauv cov txheej txheem hydration ntawm anhydrous gypsum, cov qoob loo yuav hloov pom tseeb, los ntawm thawj cov qauv granular maj mam mus rau hauv koob, daim ntawv los yog phaj qauv, grain maj mam coarser, siv lead ua duab maj mam ua kom tiav.

Ntxiv Gypsum Activator

Tsis tas li ntawd, ntxiv ntau yam admixtures xws li retarder, dej txo tus neeg saib xyuas thiab dej tuav tus neeg sawv cev tuaj yeem hloov pauv cov yam ntxwv ntawm gypsum substrate. Lub sij hawm pib ntawm architectural gypsum yog 6 ~ 30 min, thiab lub sijhawm ua haujlwm yog 5 ~ 10 min. Ntxiv mus, tom qab sib tov nrog dej, nws yuav poob ib tug loj npaum li cas ntawm fluidity, uas ua rau ib tug loj tus naj npawb ntawm defects nyob rau hauv lub hardened gypsum lub cev. Lub sij hawm teeb tsa ntawm gypsum substrate tuaj yeem hloov kho arbitrarily nyob rau hauv ntau yam los ntawm kev xaiv qhov tsim nyog retarder thiab ntau npaum li cas kom tau raws li qhov yuav tsum tau ntawm kev siv technology sib txawv. Txawm li cas los xij, vim qhov kev xaiv adsorption ntawm retarder, kev loj hlob nyob rau hauv qhov ntev axis kev taw qhia ntawm gypsum dihydrate siv lead ua yog inhibited, thiab morphology ntawm gypsum siv lead ua ua luv luv thiab ntxhib los ntawm elongated koob, uas tsis muaj zog ntawm kev sib cuag thiab intergrowth ntawm crystals, uas ua rau ib tug morphology ntawm gypsum crystal. 30J txo lub zog. Retarder tseem cuam tshuam rau cov yam ntxwv ntawm kev loj hlob ntawm cov khoom siv lead ua los ntawm kev hloov cov crystal kev loj hlob. Kev tawg, hydration, crystallization thiab nag lossis daus txheej txheem ntawm fluoropyrite gypsum tau hloov, thiab lub zog tau hloov.

. Cov dej txo tus neeg sawv cev tuaj yeem nyob rau hauv tib txoj kev ntws los ntawm cov dej hauv qab gypsum sib xyaw dej los yog nyob rau hauv cov xwm txheej ntawm tib cov dej sib xyaw kom txhim kho cov kua dej ntawm gypsum slurry, ntxiv crystal-grained degree thiab crystallization ntawm kev sib cuag ntawm qhov chaw. knot ntawm daim ntawv ua tiav network system, txo cov porosity ntawm lub plaster harden lub cev, ua rau lub nqaim pore loj faib thiab siv ntau zog; Lub dihydrous gypsum ua los ntawm cov dej ceev ceev npog lub tsev gypsum, hloov cov khoom siv hluav taws xob ntawm qhov sib cuam tshuam ntawm fluoropgypsum hais, thiab txhim kho cov dispersion ntawm cov khoom hauv cov kua theem. Tsis tas li ntawd, tus neeg saib xyuas cov dej khaws cia hauv polymer feem ntau yog cov qauv sib txuas ntawm peb sab, thiab cov pab pawg hydrophilic tuaj yeem tsim cov hydrogen bonds nrog cov dej molecules thaum sib cuag nrog dej, uas tuaj yeem daws cov evaporation ntawm cov dej ntawm lub hauv paus ntawm cov khoom siv plaster. , txhim kho cov cohesiousness thiab uniformity ntawm cov ntaub ntawv plaster, thiab zam lub tiam ntawm cracking hollow nruas thiab lwm yam teeb meem.

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