Kev tawg thaum lub sij hawm ci yog ib qho teeb meem tshwm sim hauv kev tsim cov magnesia precast. Qhov no feem ntau tshwm sim los ntawm cov txheej txheem hydration ntawm magnesia, uas MgO sib xyaw nrog dej thiab ua rau cov khoom siv dej xws li magnesium hydroxide thiab brucite crystals. Kev tsim ntawm cov khoom no tuaj yeem ua rau muaj qhov nce ntxiv hauv pH, ua raws li kev tsim H2CO3. Cov tshuaj tiv thaiv no tuaj yeem ua rau tsim cov magnesium carbonate lossis magnesite, uas tuaj yeem ua rau lub ntim nthuav dav ntawm cov castable thiab ua rau muaj peev xwm tawg.
Txhawm rau tiv thaiv kev tawg hauv magnesia castables, nws yog ib qho tseem ceeb los tsim ib qho kev kho kom tsim nyog thiab ci qhov system uas tuaj yeem txo qhov hydration degree ntawm magnesia. Thaum lub sij hawm kho, qhov kub thiab txias yuav tsum nruj me ntsis tswj kom tsis txhob tsim cov brucite crystals ntau dhau rau lub sijhawm luv luv. Qhov kub ntawm ib ncig ntawm 70 degree rau 8 teev tau pom tias ua haujlwm zoo tshaj plaws hauv qhov no. Thaum lub sij hawm ci, yuav tsum tau txais ib txoj kev npaj ci sai kom tso cov dej dawb hauv lub cev kom sai li sai tau. Txawm li cas los xij, tus nqi ci yuav tsum tsis txhob ceev heev kom tsis txhob evaporate cov dej hauv cov castable sai heev.
Rau nyias phaj prefabricated qhov chaw xws li phab ntsa panels, kev tiv thaiv thaum lub sij hawm hloov khoom yuav tsum tau ntxiv dag zog los tiv thaiv tej microcracks los ntawm expanding thaum lub sij hawm kho rau ci txheej txheem. Hauv kev ntsuam xyuas ntawm qhov chaw, qhov cua sov ntawm 20 degree ·h-1 tau pom tias muaj txaus los tiv thaiv cov kab nrib pleb loj hauv slag khaws cov phab ntsa prefabricated. Nrog rau cov kev ntsuas no, cov tuam ntxhab tuaj yeem txo qhov kev pheej hmoo ntawm kev tawg thiab tsim cov khoom lag luam zoo magnesia precast.
Hu rau kuv:
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