Compaction and Breakage Characteristics of Crushed Stone Used as the Backfill Material of Urban Pavement Subsidence

Table 5

The content change of particles with different sizes and the corresponding particle breakage under different loading modes.

Samples		Particle size (mm)							(%)
		0–2	2–5	5–10	10–15	15–20	20–25	25–30
Direct loading	1 : 1 : 1 : 1	2.87	4.41	12.75	−2.71	−1.29	−9.11	−6.92	20.02
	n = 0.7	3.90	6.58	18.67	−24.63	−1.70	−2.49	−0.33	29.14
	n = 0.9	3.64	5.67	13.98	−12.57	−1.16	−5.37	−4.17	23.29
	n = 1.1	4.52	7.08	17.76	−17.35	−4.56	−2.81	−4.64	29.36
	n = 1.3	4.55	6.00	14.75	−9.09	−5.24	−4.13	−6.85	25.30
Step loading	1 : 1 : 1 : 1	9.03	10.27	17.69	−5.10	−12.08	−6.80	−13.04	36.99
	n = 0.7	12.14	12.59	22.28	−25.51	−8.69	−5.63	−7.15	47.01
	n = 0.9	9.88	11.11	20.71	−24.71	−4.44	−7.09	−5.45	41.69
	n = 1.1	12.73	13.91	22.28	−24.37	−5.89	−7.71	−10.95	48.92
	n = 1.3	10.57	11.84	22.04	−17.61	−6.91	−10.29	−9.63	44.44