3.4 Test Results and Discussions
65
Table 3.2 Dynamic spalling test data
Test No. E S (GPa) l (mm) τ (μs) ˙
ε (1/s) σ d (MPa) l (mm) τ (μs) ˙
ε (1/s) σ d (MPa)
N-0
46.0
164
28.5
14.3
18.7
225.5 23.5
46.6 50.4
214.5 29.5
29.2
39.6
114.5 24
55.5 61.3
211
24
33.7
37.2
68
12.5
102.1 58.7
93.5
20
43.0
39.6
60
9
174.2 72.1
S-1
47.3
170
27.5
35.7
46.5
188
26.5
82.7 103.7
136.5 29
43.6
59.8
119
17
130.7 105.1
103
21
48.7
48.4
104
12
182.0 103.3
104.5 22
57.3
59.6
56.5
10
214.8 101.6
147
26
57.7
71
S-2
48.1
113
24
32.7
37.8
140.5 18.5
63.5 56.5
130.5 29
35.6
49.6
104
20
99.5 95.7
150.5 27
35.7
46.3
135.5 18.5
100.2 89.2
94.5
20
50.1
48.2
66
13
142.7 89.2
H-1
46.4
183
30
24.9
34.7
130
26.5
68.0 83.3
226
24.5
39.4
44.8
206.5 22
89.5 91
177
31
44.8
64.5
197.5 20.5
103.9 98.4
H-2
48.2
197
42
18.1
36.7
154
23
69.3 76.8
191
27.5
37.0
49.1
138.5 21
110.7 112.1
156.5 33
48.3
76.8
113
15.5
141.5 105.7
162
23
62.2
69
75.5
16
141.6 109.2
Fig. 3.9 Effects of strain rate, steel fiber content and type on dynamic spalling strength of UHPCC,
reprinted from Wu et al. (2018), copyright 2020, with permission from Elsevier