Figure 5
From: Effects of carbon nanotubes on expanded glass and silica aerogel based lightweight concrete

(a) Cracks on the surface of native silica aerogel; (b) cracks aerogel in the hydrated concrete specimen.
From: Effects of carbon nanotubes on expanded glass and silica aerogel based lightweight concrete

(a) Cracks on the surface of native silica aerogel; (b) cracks aerogel in the hydrated concrete specimen.