陕北地区砂岩特性及技术性能研究_陕西省公路学会

陕北地区砂岩特性及技术性能研究

 

陈红艳1,马庆伟2,杨晨光2

1.陕西路桥集团路面工程有限公司,陕西 西安710065

2.西安ope电子竞技研究院,陕西 西安710065

  要:针对陕北地区黄延高速ope电子竞技沿线优质石灰岩匮乏、施工成本增大等问题,本文从陕北地区普遍分布的砂岩矿藏出发,采用X衍射试验,分析陕北地区的砂岩成岩过程及矿物组成;进行石灰岩与陕北地区砂岩的物理指标、力学指标的差异性研究。结果表明:砂岩的矿质组成直接影响力学性能,与石灰岩相比,陕北地区砂岩存在孔隙高、强度较低;吸水率更高,抗冻性不佳等特点;砂岩软化系数受自身孔隙率显著影响。

关键词:陕北地区;砂岩;矿物组成;技术性能

中图分类号:U416        文献标识码:A

 

Characteristics and Technical Indexes of Sandstone in Northern Shaanxi

CHEN Hong-yan1MA Qing-Wei2YANG 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