Ntuj marble yog cov pob zeb metamorphic tsim los ntawm cov pob zeb qub hauv cov pob zeb los ntawm qhov kub thiab txias hauv cov crust. Nws belongs rau nruab nrab hard pob zeb, tsuas yog tsim los ntawm calcite, limestone, serpentine thiab dolomite. Nws cov ntsiab lus tseem ceeb yog calcium carbonate, suav nrog ntau dua 50 feem pua.
Lub ntsiab feature
Kev ntxhib los mos ntawm ntuj marble yog ntom tab sis tsis nyuaj, thiab nws yog ib qho yooj yim rau txheej txheem, carve, du thiab polish. Tom qab polishing, lub marble yog du thiab muag heev, kev ntxhib los mos yog ntuj thiab du, thiab nws muaj kev zoo nkauj siab. Marble muaj qhov nqus dej tsawg thiab ua haujlwm siab, thiab tuaj yeem siv rau 40-100 xyoo.
Ntuj marble muaj qhov zoo nkauj thiab zoo nkauj, thiab polished zoo li daim iav tom qab polishing. Nws kev ntxhib los mos yog stretchable thiab zoo nkauj dua granite. Lub zog compressive siab (thib ob nkaus xwb rau granite), raws li cov pob zeb sib txawv, txog li 300MPa, tsis tshua muaj dej nqus, hnav tsis kam thiab tsis muaj deformation.
Radioactive: Ntxiv rau qhov kev xav tau siab rau kev ruaj khov thiab kev tiv thaiv ib puag ncig ntawm cov rooj tog marble, cov xov tooj cua ntawm lub pob zeb kuj tseem tswj hwm nruj heev. Tau ntev, tib neeg tau yuam kev tias cov rooj tog marble yuav muaj hluav taws xob, thiab muaj qee qhov kev txhawj xeeb thaum yuav. Raws li qhov tseeb, ntuj marble tsis tshua muaj hluav taws xob hauv hluav taws xob thiab yuav tsis ua rau tib neeg lub cev raug mob, thaum cov khoom siv hluav taws xob siab yog cov rooj tog marble.
Plaub txoj hauv kev los txheeb xyuas ntuj marble:
1 Saib ntawm kev ntxhib los mos: Txhua daim ntawm ntuj marble muaj cov qauv thiab xim tshwj xeeb.
2. Mloog lub suab: Feem ntau hais lus, lub suab ntawm lub pob zeb zoo yog nkig thiab qab ntxiag.
3 Lub teeb transmittance test: Ntuj marble muaj lub teeb transmittance siab. Ib lub teeb los yog lub teeb nyem yog siv los teeb lub nraub qaum ntawm marble. High lub teeb transmittance.
4 Muaj ib txoj hauv kev yooj yim dua rau kev paub qhov txawv ntawm cov khoom siv marble thiab ntuj marble: tso ob peb tee ntawm dilute hydrochloric acid, ntuj marble foams hnyav, thiab dag marble foams tsis muaj zog.
