Amakuru - Kuki ibuye rya granite rikomeye kandi riramba?

Kuki ibuye rya granite rikomeye kandi riramba?
Ibara ry'umukarani kimwe mu bitare bikomeye cyane mu rutare. Ntabwo ari gikomeye gusa, ahubwo ntigishongeshwa n'amazi byoroshye. Ntigishobora kwangirika bitewe na aside na alkali. Gishobora kwihanganira ibiro birenga 2000 by'umuvuduko kuri santimetero kare imwe. Ihindagurika ry'ikirere ntabwo rigira ingaruka zigaragara kuri cyo mu gihe cy'imyaka ibarirwa muri za mirongo.

Isura ya granite iracyari nziza cyane, ikunze kugaragaraumukara, umuzungu, imvi, umuhondo, ibara ry'indabyo, iroza n'ibindi bidafite ibara ry'umukara, byiza kandi bitanga umusaruro mwinshi. Ibyiza byavuzwe haruguru, biba amahitamo meza mu ibuye ry'ubwubatsi. Ibuye ry'umutima ry'urwibutso rw'intwari z'abaturage mu kibuga cya Tiananmen muri Beijing ryakozwe mu gice cya granite cyoherejwe kivanywe i Laoshan, mu ntara ya Shandong.

Kuki granite ifite ibi bintu?
Reka tubanze turebe ibintu bigize iyo granite. Mu bice by'imyunyu ngugu bigize granite, ibirenga 90% ni imyunyu ngugu ibiri, feldspar na quartz, ari nabyo bikunze kuba feldspar cyane. Feldspar akenshi ni umweru, imvi, umutuku, naho quartz nta ibara cyangwa imvi, ari byo bigize amabara y'ibanze ya granite. Feldspar na quartz ni imyunyu ngugu ikomeye kandi iragoye kuyitwara hakoreshejwe ibyuma by'icyuma. Ku bijyanye n'utudomo twijimye muri granite, ahanini ni mica y'umukara n'indi myunyu ngugu. Nubwo mica y'umukara yoroshye, ntabwo igoranye mu guhangana n'igitutu, kandi ibice byayo muri granite ni bito cyane, akenshi biri munsi ya 10%. Iyi ni yo miterere ikomeye cyane ya granite.
Indi mpamvu ituma granite ikomeye ni uko utubuto twayo tw’amabuye y’agaciro dufatanye neza, kandi ko imyenge ikunze kuba munsi ya 1% by’ingano yose y’urutare. Ibi biha granite ubushobozi bwo kwihanganira igitutu gikomeye kandi ntiyoroshye kwinjiramo n’amazi.

Nubwo granite ikomeye cyane, ariko mu gihe kirekire cy'izuba, umwuka, amazi n'ibinyabuzima, hazabaho umunsi wo "kubora", urabyemera? Umucanga mwinshi wo mu ruzi ni uduce twa quartz twasigaye inyuma nyuma yo kwangirika, kandi ibumba ryakwirakwiriye cyane naryo ni umusaruro w'ihindagurika rya granite. Ariko bizaba igihe kirekire cyane, bityo mu gihe cy'abantu, granite irakomeye cyane.