Influence of Humic Acid on the Strength of Cement-Soil and Analysis of Its Microscopic Mechanism

Figure 7

Microstructure images of different samples. (a) HA content λ = 0%. (b) HA content λ = 10%. (c) HA content λ = 20%. (d) HA content λ = 30%.

(a)

(b)

(c)

(d)