Study on the Influence of Closed-Cell Aluminum Foam on the Impact Performance of Concrete Pier after Equal Replacement with Stainless Steel Reinforcement

Table 12

Number, length, and maximum width of cracks in the lower area of the front of the specimens under different energies.

Height of drop hammer (m)	1^st group						2^nd group
	Number of cracks		Lengths of the main cracks (mm)		Widths of the main cracks (mm)		Number of cracks		Lengths of the main cracks (mm)		Widths of the main cracks (mm)
	S1-16	Z2-20	S1-16	Z2-20	S1-16	Z2-20	S1-20	Z2-25	S1-20	Z2-25	S1-20	Z2-25
2	0	0	0	0	0	0	0	0	0	0	0	0
4	0	0	0	0	0	0	0	0	0	0	0	0
6	0	0	0	0	0	0	0	0	0	0	0	0
8	0	1	0	406	0	0.21	0	1	0	270	0	0.09
10	1	2	400	520	0.15	0.31	1	2	380	400	0.11	0.12
12	2	3	460	600	0.52	0.67	2	3	450	430	0.2	0.17