YUAV UA LI CAS YUAV TSUM TAU TXAIS LUB NTIAJ TEB NO thiab lawv tuaj yeem siv qhov twg? toj roob hauv pes pob zeb

Vim li cas ib txhia ntuj pob zeb suav tias yog mos thaum lawv sawv daws zoo li nyuaj? Cov lus teb nyob hauv ' txheeb ze' hardness. Mohs scale ntawm hardness tau tsim nyob rau hauv 1812 thiab piv cov txheeb ze hardness ntawm kaum minerals. Pob zeb diamond yog qhov nyuaj tshaj plaws thiab tus nqi 10, thaum granite yog lub pob zeb nyuaj tshaj plaws ntawm 6. Limestone los ntawm 3 raws li nws cov metamorphic counterpart, marble. Softer pob zeb yog yooj yim rau hnav los yog carve tab sis tsis hnav los yog huab cua heev thiab cov pob zeb nyuaj. Ntawm no peb tham txog qee yam ntawm cov pob zeb nrov dua nrog rau cov ntawv thov tsim nyog.

Pob zeb tsis sib xws

Sedimentary pob zeb

Limestone, sandstone thiab shale yog cov feem ntau hom pob zeb sedimentary. Cov no tau tsim los ntawm kev ntxhov siab loj heev, ntau lab xyoo dhau los, ua rau cov pob zeb uas tau poob rau hauv dej hiav txwv.

Slate

Cov khaubncaws sab nraud povtseg hauv slate tau piav qhia tias yog "foliated" thiab lawv tau yooj yim sib cais los tsim txhua qhov tuab yuav tsum tau ua. UK slate yog suav tias yog ib qho nyuaj thiab yog ib txwm siv los ua vov tsev, thaum mos slate muaj nyob hauv Suav teb, Spain, Ltalis thiab Asmeskas. Nrog rau ntau yam ntawm cov xim ntuj slate, ntau qhov kev tsim qauv tuaj yeem ua tiav, los ntawm kev kawm mus rau classic, rustic rau refined. Slate feem ntau pom zoo rau thaj chaw tsheb loj, ua tsaug rau nws cov khoom muaj txiaj ntsig zoo heev. Nws kuj tsis yog ntxeem tau thiab tsis yooj yim rau cov kua qaub. Nws yog hluav taws pov thawj, huab cua resistant thiab ua tau zoo plam kuj vim nws riven tag.

Limestone

Limestone yog cov khoom siv hauv tsev ntau heev thiab yog tsim los ntawm cov pob zeb hauv av calcite, muab los ntawm cov calcium hauv cov pob txha thiab seashells tso rau ntau txhiab xyoo thiab yuam ua ke los ntawm kev siab. Thaum nws tseem muaj magnesium, nws nyuaj dua thiab huab cua tiv taus, thiab tuaj yeem polished. Portland pob zeb los ntawm eponymous kob nyob rau hauv Dorset yog tej zaum ib hom limestone nto moo tshaj plaws thiab tau siv los tsim ntau lub tsev loj hauv London. Nws yog siv rau sab nrauv cladding nrog rau paving, qhov cub thiab lwm yam sab hauv thiab sab nrauv hniav nta. Nws cov xim mos yog nws cov cim lag luam pom cov yam ntxwv.

Sandstone

Sandstone yog tej zaum feem ntau siv lub tsev pob zeb ua ntej xyoo 1800, rau txhua yam los ntawm cov choj mus rau cov tsev zoo nkauj. Raws li tej zaum yuav inferred los ntawm nws lub npe, nws yog tsim thaum xuab zeb, organic teeb meem, calcite thiab ib tug ntau yam ntawm lwm yam minerals tau fused ua ke nyob rau hauv zoo kawg siab tshaj lub millennia. Muaj nrog cov ntxhib los yog zoo zoo nkauj thiab ib txwm muab tso rau hauv matt tiav. Feem ntau cov qab zib, liab lossis grey hauv UK, nws cov xim nyob ntawm cov zaub mov ntxiv uas muaj nyob hauv nws. Silica imparts whiteness, whilst hlau yuav muab ib tug reddish-xim av tint. Nws qhov chaw tseem ceeb ntawm daim ntawv thov yog phab ntsa thiab hauv pem teb, lossis sab nrauv paving.

Marble

Marble yog ib qho derivative ntawm limestone, tsim los ntawm metamorphosis ntawm colossal tshav kub thiab siab ntau lab xyoo. Txawm hais tias tus mos mos piv rau lwm lub pob zeb, marble nyhav rau polish zoo kawg nkaus. Kev lig kev cai marble yog siv nyob rau hauv lub qhov rooj thiab pab tsim kom muaj ib tug high-end tiav.