Experimental Study on Impact Absorption Capacity of Various Expanded Materials for Rock Shed

Table 3

List of experimental results of energy balance.

Name of specimen	Presence of core slab	Type of expanded material	Falling height (mm)	Input energy Ek (J)	Absorbed energy of expanded material right under the weight Ea1 (J)	Coefficient of stress dispersion α = Ek/Ea1
N-ST-H50	Without core slab	ST	50	9.77	9.5	1.0
N-ST-H100			100	19.7	16.6	1.2
N-ST-H150			150	30.3	25.8	1.2
N-ST-H200			200	39.1	36.5	1.1
N-PP-H50		PP	50	9.34	6.3	1.5
N-PP-H100			100	19.7	14.5	1.4
N-PP-H150			150	30.3	26.8	1.1
N-EST-H50		EST	50	9.34	10.0	1.0
N-EST-H100			100	19.7	17.0	1.2
N-EST-H150			150	32.9	20.5	1.6
N-EST-H200			200	39.1	27.9	1.4
N-EST-H300			300	65.5	43.2	1.4
C-ST-H200	With core slab	ST	200	42.9	10.4	3.8
C-ST-H300			300	58.4	16.7	3.5
C-ST-H400			400	73.9	32.0	2.5
C-PP-H200		PP	200	39.1	10.4	3.8
C-PP-H300			300	65.5	21.3	2.8
C-EST-H200		EST	200	42.9	16.6	2.6
C-EST-H300			300	58.4	22.8	2.6
C-EST-H400			400	84.1	26.8	2.9
C-EST-H500			500	96.5	31.5	3.1
C-EST-H600			600	112.0	38.6	3.0