Table 6.

Physical properties of FA.

Properties	The Range (Average)	Ref. [126]	Ref. [127]	Ref. [128]	Ref. [129]	Ref. [130]	Ref. [131]	Ref. [23]
Density (g/cm3)	0.9–2.6	˂1.65	2.17	1.2–2.23	1.9–2.55	2.30	1–1.7	2.03
Bulk Density (g/cm3)	0.5–1.7	~1.23	1.26	0.99	1.6–1.8	0.57 –1.7	0.54–0.86	0.60–1.8
Particle Shape (µm)	Spherical/Irregular	Spherical	Spherical/Irregular	Spherical
Average particle size (μm)	0.5–300	˃150	1–150	6.92	10–100	~170	0.5–300	10–100
Color	Grey/Dark Brown/tan	Grey	Grey/Dark	Whitish grey	Tan–light	Tan–gray	Brown/grey	White
Specific gravity (g/cm3)	1.90–3.20	2.23	2.18	2.29	2.25–3.15	1.9–2.55	2.1–3.0	1.8–2.1
Pozzolanic activity index at 28 days (%)	75–100	79.9	˂75	-	80	80–95	75	75
Fineness, passing 45 µm (%)	12–55	83.2	32.5–52.5	˃53	34	12.5	34	40
Soundness, Le-Chatelier (mm)	10	-	10	-	10	10	10	10