| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6715096 | Construction and Building Materials | 2018 | 9 Pages |
Abstract
Air voids structure is the key parameter that affects the frost resistance of concrete, but traditional approaches of measuring the air voids of concrete are all destructive. This work utilizes the industrial computerized tomography to visualize the microstructure change during cyclic freeze/thaw test. The results indicate that the combination of industrial computerized tomography with subsequent image processing program can precisely measure the morphology and position of air voids in concrete. The air content measured by computerized tomography is slightly higher than that of traditional pore structure analyzer. The air content and spacing factor increase after cyclic freeze-thaw for both air-entrained and non-air-entrained concrete, and the variation rate of non-air-entrained concrete is several times that of air-entrained concrete. Besides, it can be directly observed from the reconstruction model that he air voids in air-entrained concrete experience no obvious expansion after cyclic freeze/thaw test, which increases the frost resistance of concrete.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Jie Yuan, Yue Wu, Jiake Zhang,