摘要
通过对分别掺入不同含量Na2SO4和NaCl并经历干湿循环的遗址土重塑样的基本水理、力学指标测试以及风洞试验,揭示试样在耦合作用下崩解速度、抗压强度、风蚀速率与盐分的关系;并通过微结构分析实验研究试样微结构特征参数与盐分之间的关系。进而通过统计学分析方法证实试样的宏观性质指标与各微结构特征参数间的相关关系并建立回归方程。研究结果表明:耦合作用通过改变微观结构而对遗址劣化进程产生影响,从而为遗址劣化程度的评价提供了微观依据。
On the basis of the results of experiment on hydraulic properties,mechanical index and wind tunnel about reconstituted samples going through dry-wet circulation after being mixed with different content of common salt Na2SO4 and NaCl,the relationships between disintegration velocity,compressive strength,shearing strength of those samples and types and amounts of salts were studied.And then,the relationship between microstructure characteristics parameters and types and amounts of salts were researched based on microstructure analysis results of samples.At last,through the method of statistical analysis,the relationship between macro-parameters and micro-structure characters was confirmed,and the regression equations were built.The results show that the coupled action takes effect on process of earthern ruin’s degradation by changing its microstructure.Above methods provide micro basis for ruin’s state of degradation evaluation.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第7期2927-2933,共7页
Journal of Central South University:Science and Technology
基金
国家"十二五"科技支撑计划(2010BAK30B02)
国家自然科学基金资助项目(51208245)
冻土工程国家重点实验室开放基金资助项目(SKLFSEl201101)
关键词
夯土
干湿
盐渍
劣化
微观结构
rammed earth
wetting-drying
salinized
degradation
microscopic structure
