Nā palena loea o ke kahua mīkini granite.

 

ʻO ka Granite, kahi pōhaku igneous i hoʻohana nui ʻia, ua kaulana ʻia no kona kūpaʻa a me kona ikaika, e lilo ia i mea kūpono no nā kumu mechanical i nā papahana kūkulu like ʻole. ʻO ka hoʻomaopopo ʻana i nā palena loea o nā kumu mechanical granite he mea nui ia no nā ʻenekinia a me nā mea kākau hale e hōʻoia i ka kūpaʻa o ke kūkulu ʻana a me ke ola lōʻihi.

ʻO kekahi o nā ʻano loea nui o ka granite ʻo ia kona ikaika compressive, kahi maʻamau mai 100 a 300 MPa. ʻO kēia ikaika compressive kiʻekiʻe e hiki ai i ka granite ke kū i nā ukana nui, e kūpono ai no nā mīkini kaumaha a me nā lako. Eia kekahi, hōʻike ka granite i ka porosity haʻahaʻa, ma waena o 0.1% a 0.5%, kahi e hāʻawi ai i kona kūpaʻa i ka infiltration wai a me ka weathering kemika, e hoʻonui hou ana i kona kūpono no nā kumu mechanical.

ʻO kekahi mea koʻikoʻi ʻo ia ka modulus o ka elasticity, no ka granite ma kahi o 50 a 70 GPa. Hōʻike kēia waiwai i ka nui o ka deform o ka mea ma lalo o ke kaumaha, e hāʻawi ana i ka ʻike i kāna hana ma lalo o nā ukana dynamic. ʻO ke coefficient hoʻonui thermal haʻahaʻa o ka granite, ma kahi o 5 a 7 x 10^-6 /°C, e hōʻoiaʻiʻo ana e mālama i kona kūpaʻa kūkulu ʻoiai me nā loli o ka mahana, e lilo ia i koho hilinaʻi no nā kumu i nā ʻano aniau like ʻole.

ʻO ka nui o ka granite, ma waena o 2.63 a 2.75 g/cm³, he kuleana koʻikoʻi nō hoʻi ia i ka hoʻolālā ʻana i ke kahua. ʻO ka nui o ka nui e kōkua i ke kūpaʻa holoʻokoʻa o ke kahua, e hōʻemi ana i ka pilikia o ka noho ʻana a i ʻole ka neʻe ʻana i ka hala ʻana o ka manawa. Eia kekahi, ʻo ke kūpaʻa o ka granite i ka abrasion a me ke komo ʻana e lilo ia i koho maikaʻi loa no nā kahua i kau ʻia i ke kaʻa nui a i ʻole ke kaumaha mechanical.

I ka hopena, ʻo nā ʻano loea o nā kumu mīkini granite, me ka ikaika compressive, modulus o ka elasticity, ka porosity haʻahaʻa, a me ke kiʻekiʻe o ka density, e hōʻike ana i kona pono ma ke ʻano he mea kumu. Ma ka hoʻohana ʻana i kēia mau waiwai, hiki i nā ʻenekinia ke hoʻolālā i nā kumu mīkini paʻa a paʻa e hoʻokō ai i nā koi o ke kūkulu ʻana o kēia au.