Figure 4. SEM micrograph comparing sandstone after and before coated with ESI and WAC

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