摘要
砒砂岩是一种特殊的泥岩、泥沙岩,是黄河中下游粗泥沙的主要来源。通过试验,观测了砒砂岩的耐水性,测试了砒砂岩的抗压强度、颗粒粒径分布、最大干密度等物理性能指标,利用X射线衍射测试了砒砂岩的矿物成分和化学成分,并通过光学电镜和扫描电镜观察了砒砂岩的微观结构。结果表明,砒砂岩力学强度在0.4~2.8 MPa之间,主要矿物成分为石英、长石和赤铁矿,氧化物成分为氧化硅、氧化铝和氧化钙。微观结构分析表明,砒砂岩结构疏松,孔隙较多,胶结物质主要为碳酸盐和黏土物质。
Pisha sandstone is a specific mudstone / sandstone,and is the main resource of Yellow River coarse sand. Through the experiment,the water resistance of Pisha sandstone was observed,and the compressive strength,particle size distribution,maximum dry density and other physical indexes of Pisha sandstone were tested. XRD,SEM and optical microscope observations were used to analyze the mineral composition,chemical composition and microstructure of Pisha sandstone,respectively. The results showed that,the mechanical strength was between 0. 4 and 2. 8 MPa. Quartz,feldspar and hematite were the main mineral composition. And the silicon dioxide,aluminium oxide,and calcium oxide were the main oxide composition. The microstructure observations indicated that the Pisha sandstone had a bad pore structure,and the carbonate and clay were the main cementing materials.
出处
《中国水土保持科学》
CSCD
北大核心
2015年第2期11-16,共6页
Science of Soil and Water Conservation
基金
“十二五”国家科技支撑计划资助项目“砒砂岩改性筑坝技术研发”(2013BAC05B03)
关键词
砒砂岩
矿物成分
抗蚀性
Pisha sandstone mineral composition anti-erodibility
