首页|期刊简介|投稿指南|分类索引|刊文选读|订阅指南|证明资料|样刊邮寄查询|常见问题解答|联系我们
吕海波,薛小杰,蒋熠,等. 基于压汞试验及氮气吸附试验下柳州红黏土微观结构分析[J]. 科学技术与工程, 2020, 20(35): 14619-14624.
lvhaibo,xuexiaojie,jiangyi,et al.Microstructure analysis of Liuzhou red clay based on mercury intrusion test and nitrogen adsorption test[J].Science Technology and Engineering,2020,20(35):14619-14624.
基于压汞试验及氮气吸附试验下柳州红黏土微观结构分析
Microstructure analysis of Liuzhou red clay based on mercury intrusion test and nitrogen adsorption test
投稿时间:2019-12-25  修订日期:2020-08-30
DOI:
中文关键词:  红黏土 压汞试验 氮气吸附试验 微观孔隙
英文关键词:red clay, mercury injection test, nitrogen adsorption test, micropore
基金项目:国家自然科学基金(项目编号:51169005)
              
作者单位
吕海波 桂林理工大学 广西岩土力学与工程重点实验室,贺州学院
薛小杰 桂林理工大学 广西岩土力学与工程重点实验室
蒋熠 城市建设投资发展有限公司
尹国强 桂林理工大学 广西岩土力学与工程重点实验室
曾召田 桂林理工大学 广西岩土力学与工程重点实验室
摘要点击次数: 146
全文下载次数: 58
中文摘要:
      土体微观结构是影响其变形破坏、强度等特性的内因,为探究土中孔隙分布特点,针对柳州红黏土的原状样和重塑样进行压汞试验、氮吸附试验,通过探究发现:红黏土中发育有大小不一的团粒,由于游离氧化铁的胶结作用,团粒内部具有高的稳定性,在一般的荷载作用或扰动下不会发生破坏,且团粒内部存在大量尺寸较小的孔隙,与团粒间孔隙一起构成红粘土的孔隙空间;红黏土中孔径分布的双峰结构非常明显,团粒内的孔隙由于强胶结作用而保持稳定。不同制样方法形成的土体的团粒内孔隙是稳定的,重塑土样相对原状土样,孔隙体积更大,结构松散;压汞试验孔隙测量比较全面,含盖广,包括了大孔隙和微孔隙,整体孔隙分布和孔隙累积体积展示清晰,而氮气吸附试验更侧重于微孔隙体积的测量,且测量精确度高,故两者结合能更为详细、精确。
英文摘要:
      The microstructure of soil is an internal cause that affects its deformation, failure, strength, and other characteristics. In order to explore the characteristics of pore distribution in the soil, mercury intrusion tests and nitrogen adsorption tests were performed on the original and remodeled samples of Liuzhou red clay. Aggregates of various sizes are developed in red clay. Due to the cementation of free iron oxide, the interior of the granules has high stability, and will not be damaged under general loading or disturbance. There are a large number of small-sized pores inside the granules. Together with the pores between the grains, the pore space of the red clay is formed; the bimodal structure of the pore size distribution in the red clay is very obvious, and the pores in the grains remain stable due to strong cementation. The pores in the soil mass formed by different sample preparation methods are stable. Compared with the original soil sample, the remolded soil sample has a larger pore volume and a loose structure. The pore measurement of the mercury pressure test is comprehensive and covers a wide range, including large pores and Micropores, overall pore distribution and pore cumulative volume are clearly displayed. The nitrogen adsorption test focuses more on the measurement of micropore volume, and the measurement accuracy is high, so the combination of the two can be more detailed and accurate.
查看全文  查看/发表评论  下载PDF阅读器
关闭
你是第35088322位访问者
版权所有:科学技术与工程编辑部
主管:中国科学技术协会    主办:中国技术经济学会
Tel:(010)62118920 E-mail:stae@vip.163.com
京ICP备05035734号-4
技术支持:本系统由北京勤云科技发展有限公司设计

京公网安备 11010802029091号