Figure 10. SEM micrograph of the addition of 20% extra cement

From

The Effect of sieved Coal Bottom Ash as a Sand Substitute on the Properties of Concrete with Percentage Variation in Cement

M. P. Kadam, Y. D. Patil

American Journal of Civil Engineering and Architecture. 2014, 2(5), 160-166 doi:10.12691/ajcea-2-5-2