Figure 3. SEM micrograph comparing sandstone after and before coated with B44 and b72

From

Compressive and Failure Strength of Sand Stone with Different Strengthen Materials

Mohammed Y. Abdellah, A.F. Gelany, Mahmoud M. Abu Zeid

American Journal of Materials Engineering and Technology. 2014, 2(3), 43-47 doi:10.12691/materials-2-3-4