Fig. 2
From: Incorporation of untreated rice husk ash and water treatment sludge in masonry unit production
Scanning electron microscopy (SEM) images of (a) RHA and (b) WTS
Fig. 2 | Sustainable Environment Research
From: Incorporation of untreated rice husk ash and water treatment sludge in masonry unit production
Scanning electron microscopy (SEM) images of (a) RHA and (b) WTS