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

Table 3

The change in particle content under different loading speeds for samples with different gradations.

Loading speed (mm/min)		Particle size (mm)							(%)
		0–2	2–5	5–10	10–15	15–20	20–25	25–30
1 : 1 : 1 : 1	1	4.18	6.24	13.23	−2.29	−4.78	−5.08	−11.50	23.64
	2	2.87	4.41	12.75	−2.71	−1.29	−9.11	−6.92	20.02
	4	3.65	5.30	12.43	−1.27	−0.01	−8.88	−11.23	21.38
	6	3.71	5.36	13.86	−2.87	−4.12	−5.86	−10.12	22.93
n = 0.7	1	4.96	7.61	19.02	−21.36	−2.23	−5.82	−2.20	31.58
	2	3.90	6.58	18.67	−24.63	−1.69	−2.48	−0.33	29.14
	4	4.24	6.49	18.41	−22.18	−2.17	−3.47	−1.31	29.13
	6	3.93	6.31	18.32	−24.46	−1.83	0.33	−2.59	28.88
n = 0.9	1	4.60	6.58	16.05	−17.51	−2.46	−1.73	−5.49	27.22
	2	3.64	5.67	13.98	−12.56	−1.16	−5.37	−4.17	23.29
	4	5.10	7.72	18.43	−21.96	−3.06	−2.36	−3.86	31.24
	6	5.40	7.73	17.92	−16.76	−1.81	−7.39	−5.11	31.05
n = 1.1	1	4.70	6.65	16.04	−11.48	−3.66	−3.26	−8.91	27.38
	2	4.52	7.08	17.76	−17.35	−4.56	−2.81	−4.64	29.36
	4	4.41	6.43	16.30	−11.35	−4.74	−4.09	−6.90	27.13
	6	4.77	6.77	16.17	−14.15	−3.50	−4.02	−5.98	27.70
n = 1.3	1	4.08	6.08	14.32	−7.79	−1.92	−7.96	−6.86	24.47
	2	4.55	6.00	14.75	−9.09	−5.23	−4.13	−6.85	25.30
	4	4.01	5.58	13.23	−8.04	−3.74	−7.45	−3.56	22.82
	6	4.75	6.79	15.70	−8.61	−2.55	−9.52	−6.56	27.24