Crumble the ci limestone chunks. Muab ob lub hnab looj tes ua haujlwm thiab siv koj ob txhais tes los txhuam cov limestone txias rau hauv cov hmoov zoo. Cov hmoov nplej yog cov cement, uas koj tuaj yeem sib tov nrog dej, xuab zeb, thiab pob zeb los ua pob zeb.
Muaj peev xwm ua tau ib txwm muaj?
Tab sis cov cement tsis yog qee yam ntawm cov khoom siv organic - nws yog tsim los ntawm kev sib xyaw tshuaj ntawm 8 cov khoom xyaw tseem ceeb thaum lub sij hawm tsim cov cement. Cov khoom xyaw no feem ntau muab rho tawm los ntawm limestone, av nplaum, marl, shale, chalk, xuab zeb, bauxite, thiab hlau ore
pozzolanic cement yog dab tsi?
Pozzolanic cements yog sib xyaw ntawm portland cement thiab cov khoom siv pozzolanic uas tej zaum yuav yog ntuj lossis dag. Lub ntuj pozzolanas yog cov ntaub ntawv tseem ceeb ntawm volcanic keeb kwm tab sis suav nrog qee lub ntiaj teb diatomaceous. Cov khoom siv dag zog muaj xws li cov tshauv ya, hlawv av nplaum, thiab shales.
Xim zeb yog dab tsi?
Cement tseem ceeb muaj cov txheej txheem ntxhia: ob lub calcium silicates, calcium aluminate thiab cov siv lead ua sib xyaw hu ua calcium aluminate ferrite (C4AF). Thaum thawj peb tshwm sim li dawb huv cov zaub mov, pureC4AF muaj xim av vim nws cov ntsiab lus. Yog li theoretically, ntshiab cement yuav xim av.
Yuav ua li cas ntxiv rau cement kom nws muaj zog?
Koj tuaj yeem ntxiv ntau Portland cement rau bagged pob zebkom nws muaj zog. Koj tuaj yeem ntxiv hydrated txiv qaub. Ua kom cov pob zeb muaj zog tshaj plaws, cov xuab zeb yuav tsum tau muab los ntawm volcanic lava uas muaj cov ntsiab lus silica siab.
