摘要
在对昆明某地玄武岩红土进行现场勘察的基础上 ,对其剖面的物质组成取样进行了研究 .结果表明 :玄武岩红土剖面的物质组成由地表向下呈有规律的变化 ,化学成分以SiO2 ,Fe2 O3,Al2 O3为主 ,随剖面深度的增大 ,SiO2 逐渐增大 ,Fe2 O3和Al2 O3逐渐减少 ;烧失量、pH值、比表面积、阳离子交换量都逐渐减小 .颗粒组成上细下粗 ,具中等分散性 ,粘粒含量不高 ,天然含水率小 ,土颗粒密度大 ,低塑性 ,不具膨胀性 ,有一定崩解能力 .
This paper analyses the substance compositing of the basalt laterite section, based on site investigation the basalt laterite in Kunming area. The research results shows that the substance compositions of the basalt laterite section exists the change regulations from the ground surface to deep, SiO 2 and Fe 2O 3 and Al 2O 3 are the main chemical compositions. The SiO 2 increases gradually, but the Fe 2O 3 and Al 2O 3decrease gradually, the burning quantity, the pH values and the cation exchange capacity decrease gradually with the increasing of the section depth. The grain compositions of the laterite section is thin up and thick deeply, the desperse is mediate, the clay centent and the natural moisture centent and the plastic are low, the specific gravity is larg, it does not have the swelling and has the definite collapse. It fully responses that the laterization of the same section decreases gradually from the ground surface to deep.
出处
《昆明理工大学学报（理工版）》
2000年第4期88-92,共5页
Journal of Kunming University of Science and Technology(Natural Science Edition)
基金
云南省科委应用基础研究基金!(项目编号 :97E0 48M )
国家自然科学基金!(项目批准号:5 996 80 0 2 )
关键词
玄武岩红土
化学成分
颗粒组成
剖面特征
Basalt laterite
chemical composition
grain composition
section properties
