摘要
为掌握材料配比和试验条件对泡沫轻质土疲劳性能的影响,改变水固比、粉煤灰用量和水泥用量制备泡沫轻质土小梁试件进行不同试验频率和应力比条件下三点加载疲劳试验,对其疲劳寿命进行分析。结果表明:随着水固比降低和水泥用量增加,泡沫轻质土疲劳寿命逐渐增加,其中水固比越低,增加水泥用量对其疲劳寿命的提高作用越明显;水泥用量不变时,增加粉煤灰用量能提高泡沫轻质土疲劳寿命,而胶凝材料用量不变时,增加粉煤灰用量会使疲劳寿命降低;泡沫轻质土疲劳寿命随试验频率的增加而增加,随应力比的增加而降低。
In order to master the effect of material ratio and test conditions on the fatigue properties of foam lightweight soil,the foam light soil trabecular specimens were prepared by changing the water-solid ratio,the content of fly ash and the cement,then threepoint loading fatigue test under different test frequency and stress ratio conditions was carried out in order to analyze the fatigue life.The results show that with the decrease of water-solid ratio and the increase of cement content,the fatigue life of foam light soil increases gradually,and the lower the water-solid ratio,the more obvious the effect of increasing cement content on fatigue life.When the cement content is constant,increasing the fly ash content can improve the fatigue life of foam light soil.When the cementing material content is constant,increasing the fly ash content will reduce the fatigue life.The fatigue life of foam light soil increases with the increase of test frequency,and decreases with the increase of stress ratio.
作者
李晓亮
LI Xiao-liang(Shanxi Transportation Planning Survey and Design Institute Co.,Ltd.,Taiyuan,030032,Shanxi,China)
出处
《合成材料老化与应用》
2020年第3期82-85,共4页
Synthetic Materials Aging and Application
关键词
泡沫轻质土
疲劳性能
配比
水泥
foam light soil
fatigue performance
ratio
cement
