Micromechanical Properties of Concrete under Freezing-Thawing Condition

被引：4
|
作者：
Tang, B. X. [1 ]
Xie, R. F. [2 ,3 ]
机构：
[1] Ankang Univ, Sch Econn & Management, Ankang 725000, Peoples R China
[2] Nantong Vocat Univ, Sch Civil Engn, Nantong 226007, Peoples R China
[3] Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai 200240, Peoples R China
来源：
RUSSIAN JOURNAL OF NONDESTRUCTIVE TESTING | 2020年 / 56卷 / 06期
关键词：
micromechanical properties; nanoscratch; scratch hardness; ITZ; NANO-SCRATCH; CEMENT PASTE; COATINGS; DAMAGE; CRYSTALLIZATION; RESISTANCE; BEHAVIOR;
D O I：
10.1134/S1061830920060078
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The researches on micromechanical properties of concrete subjected to freeze-thaw cycles are few. Under freeze-thaw action, the changes of micromechanical structure and mechanical properties of mortar and interfacial transition zone (ITZ) were characterized by nanoscratch. The volume fraction of micropores increases almost linearly, up to approximate 45%. Moreover, the scratch hardness of different micro-phases in mortar and ITZ decreases gradually with the increase of freeze-thaw cycles, which can be attributed to the increase of micropores. In addition, the thickness of the ITZ gradually increases to 60 um under 1500 F-T cycles, which is consistent with the results using SEM.
引用
收藏
页码：527 / 539
页数：13
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