**2.3 Self-X concrete mixes**

Self-X concrete mixes are special types of mixes that provide specific advantage (s) to address a given project challenge. Examples of Self-X concrete mixes are as follows:


Thus, SCC mixes usually incorporate silica fume for increased strength to sustain increased loading. Self-X concrete mix improved performance is shown in **Figure 2**.

**Figure 2.** *(A) Self-healing concrete [6], (B) self-cleaning concrete [7], and (C) SCC concrete [8].*
