网纹红土孔隙特性研究

卓丽春; 李建中; 黄飞

doi:10.3969/j.issn.1001-5485.2014.08.0112014,31(08):55-59

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长江科学院院报 ›› 2014, Vol. 31 ›› Issue (8) : 55-59. DOI: 10.3969/j.issn.1001-5485.2014.08.0112014,31(08):55-59

岩土工程

网纹红土孔隙特性研究

卓丽春,李建中,黄飞

作者信息 +

Pore Characteristics of Reticulated Red Clay

ZHUO Li-chun, LI Jian-zhong, HUANG Fei

Author information +

文章历史 +

摘要

土内孔隙形状、大小及分布是土的结构组成的重要因素,对与土体体积相关的总体工程行为起着重要的作用。利用基于气体吸附的全自动比表面积分析仪,研究了网纹红土的孔隙形态、比表面积、孔容、孔径分布与孔隙的分形特性。研究表明:网纹红土由片状矿物构成,孔隙形态以窄缝状为主;比表面积为20.9 m²/g;网纹红土所含黏土矿物主要为高岭石;孔径小于3 150 的总孔容主要由27～1 958 的中、大孔构成;孔径分布以41,130,180,350 孔分布最优,平均孔径为1 415 ;孔隙分布具有分形特征,分形维数为2.7与2.8。研究该土体孔隙特征对于土的工程性质有着重要的指导意义。

Abstract

The shape, size, and distribution of the pore spaces in soil are critical elements of soil’s structural composition, and they play principal roles in governing the overall engineering behavior of the bulk soil mass. The pore characteristics of reticulated red clay including the shape of the pore, specific surface area, pore volume, distribution of pore diameter, and fractal characteristic was analyzed by automatic specific surface area analyzer based on gas absorption method in this paper. The results reveal that reticulated red clay is consisted of plate-shaped minerals, and the pore is slit-shaped; the specific surface area of reticulated red clay is 20.9 m²/g, which indicate that the clay minerals it contained was mainly kaolin; the total pore volume with pore diameter less than 3 150  is largely composed of mesopore and megalopore with diameter ranging from 27  to 1 958 . The distribution curve of pore diameter demonstrated that the optimal size of pore diameter are 41,130,180, 350 ,and the average pore diameter is 1 414 .The pore distribution of reticulated red clay has fractal characteristic, and the fractional dimension is 2.7 and 2.8.

导出引用

卓丽春,李建中,黄飞. 网纹红土孔隙特性研究[J]. 长江科学院院报. 2014, 31(8): 55-59 https://doi.org/10.3969/j.issn.1001-5485.2014.08.0112014,31(08):55-59

ZHUO Li-chun, LI Jian-zhong, HUANG Fei. Pore Characteristics of Reticulated Red Clay[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(8): 55-59 https://doi.org/10.3969/j.issn.1001-5485.2014.08.0112014,31(08):55-59

中图分类号： P642.1

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