南沙吹填土物相结构特性分析研究

Analysis of phase structure characteristics for dredger fill from Nansha

通过现场取南沙吹填土样,室内开展粒度测试、物相分析、微观结构、元素含量、比表面积分析,并通过土工试验测试基本物理力学指标。从物理至化学、宏观至微观的角度综合分析了南沙吹填土物相结构特性。试验结果表明:吹填土以白云母和石英为主;微观结构为絮凝片状;O、Si元素的质量分数多;比表面积在黏土矿物中偏小,微电场及结合水膜形成相对较弱。

Using the dredger fill sample from Nansha area, we carry out a series of tests in laboratory for the grading, phase, microstructure, element content, and specific surface area analysis. We also obtain the basic physical and mechanical indices by geotechnical experiment. Through comprehensive analysis from the views of physics to chemistry and by the macro way to micro way, we obtain the phase structure characteristics of dredger fill from Nansha area. Test results show that dredger fill is mainly of muscovite and quartz; microstructure appears as flocculation plate; the mass fraction of elements 0 ＆ Si constitute the majority. The specific surface area is less for clay minerals, so it causes relatively weak minute electric field and combined water film.