Figure 9. The appearance of the brick specimens (BW3 samples) after curing at 28 days

From

Utilization of Water Treatment Plant Sludge and Coal Fly Ash in Brick Manufacturing

Denise Alves Fungaro, Mauro Valério da Silva

American Journal of Environmental Protection. 2014, 2(5), 83-88 doi:10.12691/env-2-5-2