工程地质学报Issue(5)：982-988,7.DOI:10.13544/j.cnki.jeg.2015.05.024
石棉纤维粉煤灰水泥加固软土试验研究
EXPERIMENTAL STUDY ON ASBESTOS FIBER REINFORCED FLY ASH SOIL-CEMENT FOR SOFT SOIL ENHANCEMENT
摘要
Abstract
This paper aims to improve the brittle fracture characteristics of cement soil and to study the engineering properties and mechanical mechanism of asbestos fiber reinforced soft soil.It adds the asbestos fiber into fly ash and cement soil.Thus it creates a new kind of composite soil and carries out a series of experiments on the new soil.In these experiments,asbestos fiber is added into fly ash and cement soil with different ratios(0%~9%),which results in different composite soil samples with different content of asbestos fiber.All of the composite soil samples are subjected to the direct shear test,the unconfined compression test,the diametral compression test and the scanning electron microscopy test (SEM).Thus the mechanical behavior and mechanism of fiber reinforced soft soil are illustrated.It is found that the combination of asbestos fiber and fly-ash cement can significantly enhance the strength and stability of soft soil and improve brittle fracture characteristics of cement soil.There is a range of optimal content of asbestos fiber regarding the enhancement of the strength value of the composite soil.This range is between 3%~6%.Other asbestos fiber content outside the range can reduce the enhancement effect.关键词
石棉纤维/粉煤灰/水泥土/软土加固/微观结构Key words
Asbestos fiber/Fly-ash/Cement soil/Reinforcing soft soil/Microstructure分类
建筑与水利引用本文复制引用
张艳军,于沉香,凌飞,严稳平,刘续,陈铂..石棉纤维粉煤灰水泥加固软土试验研究[J].工程地质学报,2015,(5):982-988,7.基金项目
武汉市建设科研项目深基坑被动区结构化加固新技术研发（201219）资助． （）
