Video: Dab tsi yog silica cement?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Crystalline Silica thiab Portland Maas . Limestone, av nplaum thiab xuab zeb feem ntau siv los ua chaw nyob xis mas . Hauv lawv daim ntawv nyoos, cov ntaub ntawv no muaj ntau qhov sib txawv ntawm silicon dioxide. Tab sis thaum lawv sib xyaw thiab ua kom sov kom sov hauv qhov kub xis mas kiln, lub resulting clinker muaj cov ntsiab lus tshiab.
Ua raws li qhov no, kev siv silica hauv cement yog dab tsi?
Silica (Sib2) Txaus txaus ntawm silica pab rau tsim ntawm di- calcium thiab tri- calcium silicates uas txhawb lub zog rau cov cement. Cov silica ntau dhau hauv cov cement yuav ua rau lub zog ruaj khov ntxiv tab sis tib lub sijhawm teeb tsa cov cement kuj nce ntxiv.
Tsis tas li, puas yog silica muaj teeb meem rau tib neeg? Nqus dej crystalline silica tuaj yeem ua rau mob hnyav, qee zaum ua rau tuag taus xws li silicosis, mob qog noj ntshav, mob ntsws (hauv cov neeg uas muaj tus mob silicosis), thiab mob ntsws ntev (COPD). Tsis tas li ntawd, silica kev kis tau txuas nrog lwm yam mob xws li mob raum thiab lwm yam qog nqaij hlav.
Cov lus nug tseem yog, puas muaj silica hauv cov cement?
Crystalline silica yog a cov ntxhia uas pom muaj nyob hauv cov lub ntiaj teb crust. Cov ntaub ntawv xws li xuab zeb, pob zeb, pob zeb , thiab mortar muaj crystalline silica . Nws kuj tseem siv los ua cov khoom lag luam xws li iav, tais diav, ceramics, cib, thiab pob zeb dag. Kwv yees li 2.3 lab tus tib neeg hauv cov Tebchaws Asmeskas raug rau silica tom haujlwm.
Qhov sib txawv ntawm silica fume thiab microsilica yog dab tsi?
Silica fume Muaj feem ntau ntawm amorphous (non-crystalline) silicon dioxide (SiO2). Qhob uas muaj silica hmoov tuaj yeem muaj lub zog siab heev thiab tuaj yeem ruaj khov. Micro Silica Fume los yog Microsilica yog cov khoom me me tshaj li Cement. Nws yog tsim los ntawm qee qhov kev ua tshuaj lom neeg ntawm cov hmoov tshauv.
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