Mu duce tw’imyunyu ngugu tugize granite, abarenga 90% ni feldspar na quartz, muri two feldspar ikaba ari yo nyinshi. Feldspar akenshi iba umweru, imvi, n’umutuku nk’inyama, naho quartz ikaba ahanini idafite ibara cyangwa imvi, ari na byo bigize ibara ry’ibanze rya granite. Feldspar na quartz ni imyunyu ngugu ikomeye, kandi biragoye kuyikoresha icyuma. Ku bijyanye n’utudomo twijimye muri granite, cyane cyane mica y’umukara, hari n’utundi tunyabutabire. Nubwo biotite yoroshye, ubushobozi bwayo bwo kwihanganira stress ntabwo ari buke, kandi icyarimwe iba ifite ingano nto muri granite, akenshi ikaba iri munsi ya 10%. Iyi ni yo mimerere y’ibikoresho aho granite iba ikomeye cyane.
Indi mpamvu ituma granite ikomeye ni uko uduce twayo tw’imyunyu ngugu tuba dufatanye cyane kandi tukaba dufatanye. Utwo tuyobo akenshi tuba turi munsi ya 1% by’ingano yose y’urutare. Ibi biha granite ubushobozi bwo kwihanganira imbaraga zikomeye kandi ntiyoroshye kwinjiramo n’ubushuhe.
Igihe cyo kohereza: Gicurasi-08-2021