Nkhani - N’chifukwa chiyani miyala ya granite ndi yolimba komanso yolimba?

N’chifukwa chiyani miyala ya granite ndi yolimba komanso yolimba?
Granitendi imodzi mwa miyala yamphamvu kwambiri pamwala. Siyolimba kokha, komanso siisungunuka mosavuta ndi madzi. Siingathe kukokoloka chifukwa cha asidi ndi alkali. Imatha kupirira kupanikizika kopitilira 2000 kg pa sikweya sentimita. Kusinthasintha kwa nyengo sikuli ndi zotsatirapo zomveka bwino pamwalawu kwa zaka zambiri.

Maonekedwe a granite akadali okongola kwambiri, nthawi zambiri amawonekawakuda, woyera, imvi, wachikasu, mtundu wa maluwa, duwa ndi zina zotero, zimaphatikiza dothi lakuda, lokongola komanso lopatsa. Ubwino womwe uli pamwambapa, umakhala chisankho chabwino kwambiri pamwala womangira. Mwala wamtima wa chikumbutso cha ngwazi za anthu ku Tiananmen Square ku Beijing wapangidwa kuchokera ku chidutswa cha granite chomwe chatumizidwa kuchokera ku Laoshan, chigawo cha Shandong.

N’chifukwa chiyani granite ili ndi makhalidwe amenewa?
Tiyeni tiyambe ndi kufufuza zosakaniza zake. Mwa tinthu ta mchere tomwe timapanga granite, oposa 90% ndi mchere awiri, feldspar ndi quartz, omwenso ndi feldspar ambiri. Feldspar nthawi zambiri imakhala yoyera, imvi, yofiira, ndipo quartz imakhala yopanda mtundu kapena imvi, zomwe zimapanga mitundu yoyambira ya granite. Feldspar ndi quartz ndi mchere wolimba ndipo ndi wovuta kusuntha ndi mipeni yachitsulo. Ponena za mawanga akuda mu granite, makamaka mica yakuda ndi mchere wina. Ngakhale mica yakuda ndi yofewa, si yofooka polimbana ndi kupanikizika, ndipo zigawo zake mu granite ndi zazing'ono kwambiri, nthawi zambiri zosakwana 10%. Uwu ndiye mkhalidwe wolimba kwambiri wa granite.
Chifukwa china chomwe granite ilili yolimba ndichakuti tinthu take ta mchere timalumikizana bwino, ndipo nthawi zambiri timapanga 1% ya kuchuluka kwa miyala yonse. Izi zimapangitsa granite kukhala ndi mphamvu yolimbana ndi kupanikizika kwamphamvu ndipo madzi salowa mosavuta.

Ngakhale granite ndi yolimba kwambiri, koma pakapita nthawi yayitali ya dzuwa, mpweya, madzi ndi zamoyo, padzakhala tsiku la "kuvunda", kodi mungakhulupirire? Mchenga wambiri mumtsinje ndi tinthu ta quartz tomwe tatsala pambuyo poti tawonongeka, ndipo dongo lomwe lafalikira kwambiri ndi chinthu chomwe chinapangidwa chifukwa cha kusinthasintha kwa granite. Koma idzakhala nthawi yayitali, kotero pankhani ya nthawi ya anthu, granite ndi yolimba kwambiri.