Experimental Investigation on Mechanical Properties of Cemented Paste Backfill under Different Gradations of Aggregate Particles and Types and Contents of Cementing Materials

Table 1

Primary chemical and physical properties of the cementing materials.

Types	Ca (wt.%)	Al (wt.%)	Si (wt.%)	Fe (wt.%)	Mg (wt.%)	S (wt.%)	Ti (wt.%)	Relative density
Cement	44.93	2.47	8.43	1.80	1.69	1.51	1.59	3.11
Gypsum	24.56	0.56	1.99	2.09	0.79	19.60	1.22	2.53
Clay	0.83	20.12	23.80	0.39	1.12	0.03	—	1.59