|
|||||
|
|
X-ray microtomography (microCT) of the progression of sulfate attack of cement paste |
|
| Authors: | S.R Stock N.K NaikA.P Wilkinson K.E Kurtis |
| Affiliation: | a School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA b School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA c School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA |
| Abstract: | High-resolution X-ray computed tomography (i.e., microCT or microtomography) was used to study the sulfate attack of cylinders of Type I cement paste cast with water-cement (w/c) ratios of 0.45, 0.50 and 0.60. Damage levels in samples exposed to a Na2SO4 solution with 10,000 ppm sulfate ion concentration were qualitatively rated from 0 (no damage) to 4 (extreme damage) based upon visual examination of the samples' exteriors and microtomography of the samples' interiors. The greater the w/c ratio, the more rapid the onset of sulfate damage. The corners of the cylinders appeared to be particularly susceptible to spalling, and damage may have continued into the cement paste by formation of subsurface cracks. |
| Keywords: | Microtomography MicroCT Cement paste Sulfate attack X-ray Nondestructive evaluation |
| 本文献已被 ScienceDirect 等数据库收录！ | |