Evaluating the Effect of Calcination and Grinding of Corn Stalk Ash on Pozzolanic Potential for Sustainable Cement-Based Materials

Figure 4

(a) Corn stalk. Color change at different temperatures: (b) CS400, (c) CS500, (d) CS600, (e) CS700, and (f) CS800.

(a)

(b)

(c)

(d)

(e)

(f)