磷石膏的物理力学特性  

The physical-mechanical properties of phosphogypsum

作　　者：沈婷[1] 王芳[1] 李国英[1] 

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《磷肥与复肥》2008年第3期21-23,共3页Phosphate & Compound Fertilizer

摘　　要：磷石膏因选矿、生产工艺的不同,不同地区的磷石膏物理力学性质存在一定的差异。物理性质实验结果表明,磷石膏呈板状晶体结构,颗粒组成属粉土范围,但其相对密度一般较同粒径土小,液塑限有粉土的性质,渗透性能良好。力学性质实验结果表明,磷石膏具有独特的压缩特性,由于本身可压缩,因此具有不同于土类的固结特性,碾压磷石膏的压缩性比自堆积体小得多,其抗剪强度指标也较好,比一般土类高,对坝体稳定有利。Phosphogypsum produced various areas has differences in by different rock concentrated methods, processing technologies in physical and mechanical properties. The experiments show that phosphogypsum is with plate-shape crystal structure, and its particle gradation belongs to the range of silt. The relative density of phosphogypsum is smaller than that of the same size soil and its liquidplastic limit has similar properties to silt. Permeability of phosphogypsum is better than that of the same size soil. The experiments on mechanical properties show that phosphogypsum has particular compressibility. Phosphogypsum has different consolidation characteristic which is different from that of soil due to its particle can be compressed. The compressibility of the phosphogypsum with the compactness of 90% after rolling is much smaller than that of sedimentary phosphogypsum. Shear strength of phosphogypsum is much better than that of soil, which is helpful to stability of dam.

关 键 词：磷石膏 磷石膏渣坝 物理力学性质 

分 类 号：TQ177.3[化学工程—硅酸盐工业]