玄武岩散粒红土(HCP2e)的粒度成分试验研究  

Experimental Study on Non-coherent Basalt Laterite (HCP 2e) Particle Size Composition

作　　者：郑家毓 符必昌[1] 刘帅[1] Zheng Jiayu;Fu Bichang;Liu Shuai(Kunming University of Science and Technology,Kunming,Yunnan 650032)

机构地区：[1]昆明理工大学

出　　处：《中国煤炭地质》2019年第9期66-69,86,共5页Coal Geology of China

摘　　要：红土的粒度组成对研究红土的工程地质性质至关重要。昆明呈贡大学城广泛发育着各种类型红土,红土粒度组成复杂、工程性质差别较大。采用密度计法展开一系列颗粒分析试验,测得不同分散剂及质量分数对玄武岩散粒红土的粒度组成及分维值的变化情况。试验结果表明:玄武岩散粒红土选用不同的分散剂和质量分数时测定得出的结果不同;玄武岩散粒红土的分维值在2.4486~2.8950,且分维曲线表现为两个不同区间;玄武岩散粒红土采用质量分数为6.0%的六偏磷酸钠作为分散剂时达到最佳分散效果,并获得该类型红土的粒度组成特征值,以准确表征该类型红土的粒度组成,为玄武岩散粒红土推荐使用合适的分散剂提供参考。The particle size composition of laterite is crucial in laterite engineering geological property study.Various types of laterite have widely distributed in the Chenggong College Town,Kunming with complex particle size compositions and largely varied engineering properties.Using densitometer method has carried out a series of particle assays,worked out variation status of non-coherent basalt laterite particle size composition and fractal dimension value under different conditions of dispersant and mass fraction.The assays have shown that the tested results are different under different dispersants and mass fractions.Non-coherent basalt laterite fractal dimension values are between 2.4486~2.8905,and fractal dimension curve showing two different intervals;while using mass fraction 6.0%calgon as dispersant can obtain optimal dispersion effect and this type laterite particle size composition eigenvalue to characterize laterite particle size composition truly.The study has provided reference in selection of appropriate dispersant for non-coherent basalt laterite.

关 键 词：红土 粒度组成测定 分形 六偏磷酸钠 

分 类 号：P642.132[天文地球—工程地质学]