Kodi makulidwe a granite amasintha pakapita nthawi?

Nthawi zambiri, kachulukidwe ka granite sikusintha kwambiri pakapita nthawi, koma pamikhalidwe ina, imatha kusintha. Zotsatirazi ndikuwunika kosiyanasiyana:
Muzochitika zachilendo, kachulukidwe kake kamakhala kokhazikika
Granite ndi mwala woyaka moto wopangidwa ndi mchere monga feldspar, quartz ndi mica, ndipo mapangidwe ake ndi aatali komanso ovuta. Pambuyo pakupanga kwake, kapangidwe kake kamkati ka mchere ndi kapangidwe kake kamakhala kokhazikika. Granite ili ndi mawonekedwe owoneka bwino okhala ndi yunifolomu komanso tinthu tating'onoting'ono. Porosity yake nthawi zambiri imakhala 0.3% - 0.7%, ndipo mayamwidwe ake amadzi nthawi zambiri amakhala pakati pa 0.15% ndi 0.46%. Malingana ngati sichimakhudzidwa ndi zotsatira zamphamvu za thupi ndi mankhwala kuchokera kunja, makonzedwe a mchere mkati mwake sangasinthe mosavuta, ndipo misa pa voliyumu ya unit idzakhalabe yosasinthasintha, ndi kachulukidwe kameneka kamakhala kokhazikika. Mwachitsanzo, zida za granite zomwe zinkagwiritsidwa ntchito m'nyumba zina zakale zakhalapo kwa zaka mazana kapena zikwi zambiri. M'malo osungidwa bwino, kachulukidwe kawo sikunasinthe.

Zochitika zapadera zingayambitse kusintha kwa kachulukidwe
Mphamvu yakuthupi: Ngati granite imayang'aniridwa ndi mphamvu zakunja monga kupsinjika ndi kukhudzidwa kwa nthawi yayitali, zitha kuyambitsa kusintha kwakung'ono mkati mwake. Mwachitsanzo, m'madera omwe zivomezi zachitika kawirikawiri, miyala ya granite imakhudzidwa ndi kupsinjika kwamphamvu komwe kumachitika chifukwa cha kuyenda kwa crustal. Mipata pakati pa tinthu tating'ono ta mchere tating'onoting'ono tating'ono tating'ono tating'ono tating'ono tating'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'ono tating'ono tating'ono tating'ono tating'ono tating'ono tating'ono tating'ono tating'ono tating'ono tating'ono titha kutsekedwa pang'ono, zomwe zimapangitsa kuti pakhale kuchuluka kwa zinthuzo pa voliyumu iliyonse komanso kuchuluka kwa kachulukidwe. Komabe, zosintha zotere nthawi zambiri zimakhala zazing'ono kwambiri ndipo zimafuna mphamvu zamphamvu kwambiri komanso mosalekeza kuti zichitike.
Chemical reaction: Pamene granite ikumana ndi mankhwala apadera kwa nthawi yayitali, makulidwe ake amatha kusintha. Mwachitsanzo, ngati granite ikumana ndi zinthu za acidic kapena zamchere kwa nthawi yayitali, zina mwazinthu zake zamchere zimatha kukhudzidwa ndi mankhwalawa. Mchere monga feldspar ndi mica ukhoza kuwonongeka ndi kusungunuka m'malo a acidic, zomwe zimapangitsa kuti zinthu zina ziwonongeke. Izi zimapangitsa kuti mkati mwa granite musakhale ndi ziwiya zambiri, kuchepa kwa misa, motero kutsika kwa kachulukidwe. Kuphatikiza apo, granite ikakumana ndi malo achinyezi okhala ndi mpweya wambiri wa carbon dioxide kwa nthawi yayitali, imatha kukhala ndi carbonation reaction, yomwe ingakhudzenso kapangidwe kake kamkati ndi kapangidwe kake, ndipo potero imakhudza kachulukidwe kake.
Weathering: Pansi pa nyengo yanthawi yayitali yachilengedwe monga mphepo, dzuŵa ndi mvula, pamwamba pa granite pang'onopang'ono kumang'ambika ndikuwola. Ngakhale kuti nyengo imakhudza kwambiri pamwamba pa granite, pamene nthawi ikupita ndipo nyengo ikukulirakulira, zinthu zonse za granite zidzatayika. Pansi pa chikhalidwe chakuti voliyumu imakhalabe yosasinthika kapena kusintha pang'ono, misa idzachepa ndipo kachulukidwe kakenso kachepa. Komabe, nyengo ndi njira yochedwa kwambiri ndipo zingatenge mazana kapena zaka masauzande kuti kachulukidweko kasinthe kwambiri.

Ponseponse, pansi pazachilengedwe komanso kagwiritsidwe ntchito, kachulukidwe ka granite kumatha kuwonedwa ngati kokhazikika komanso kosasinthika. Komabe, mothandizidwa ndi zochitika zapadera zakuthupi, zamankhwala ndi zachilengedwe, kachulukidwe kake kangasinthe pakapita nthawi.