Characteristics and Technical Indexes of Sandstone in Northern Shaanxi
CHEN Hong-yan1，MA Qing-Wei2，YANG Chen-guang2
(1.Shaanxi Road & Bridge Group Road Surface Construction Co.,Ltd. Xi’an 710065,China;
2. Xi’an Highway Research Institute, Xi,an 710065,China)
Abstract: In view of the shortage of high-quality limestone and the increase of construction cost in northern Shaanxi, the sandstone deposits generally distributed in northern Shaanxi were studied with X-ray diffraction test. The diagenesis process and mineral composition of sandstone in northern Shaanxi were analyzed, and the differences between physical and mechanical indexes of sandstone in the region were also studied. The results showed that the mineral composition of sandstone directly affects the mechanical properties.
key words: northern Shaanxi; sandstone; mineral composition; mechanical index