Figure 14. SEM pictures for cement pastes with different w/c ratio at 1, 3, 7, 28 days at 30µm magnification

From

Water to Cement Ratio Effect on Cement Paste Microstructural Development by Electrical Resistivity Measurements and Computer Illustration

Farqad Yousuf, Wei Xiaosheng

American Journal of Civil Engineering and Architecture. 2021, 9(3), 73-87 doi:10.12691/ajcea-9-3-1