Petrographic characteristics and mechanical properties of intrusive rocks in Ho Giang, Hoa Phu commune, Hoa Vang district, Da Nang City and ability to use them

Abstract

This paper presents the results of research on petro-graphic composition, mechanical properties of magmatic rocks in Ho Giang, Hoa Phu commune, Hoa Vang district, Da Nang city. Research results show that petro-graphic composition is mainly quartz: 30÷55%, orthoclase: 15÷52%, plagioclase: 4 ÷ 35%, Biotite: 1÷20%, coarse grained architecture, banding creating structure. Average Indicators include: SiO2 82.4%, natural moisture 0.05%, natural bulk density 2.619 g/cm3, density 2.67, compressive strength when dry 1261 kG/cm2, compressive strength when saturation 1216 kG/cm2, tensile strength 44.6 kG/ cm2, softening coefficient of 0.96, the internal angle of friction 36 011\', elastic modulus 39,5.104 kG/cm2. Hence, they meet the standards as common building materials. The results, therefore, can be used to guide the planning, rational exploitation of building stone resources in Danang.