Impact Properties of Recycled Aggregate Concrete with Nanosilica Modification
Table 7
SHPB test results of concrete specimens.
Mixture
σ0 (MPa)
Impact pressure (MPa)
(s−1)
σd (MPa)
εp (10−3)
DIF
NAC
41.30
0.20
20.2
45.49
4.755
1.10
0.25
32.6
49.56
4.981
1.20
0.30
42.7
57.41
6.063
1.39
RAC30
35.66
0.20
19.6
38.87
4.979
1.09
0.25
33.4
43.67
5.442
1.23
0.30
43.6
49.11
5.848
1.38
RAC100
32.40
0.20
22.4
37.91
5.493
1.17
0.25
31.3
43.74
5.974
1.35
0.30
44.7
48.92
6.1
1.51
SRAC30
38.60
0.20
20.4
42.07
5.176
1.09
0.25
32.2
45.94
5.296
1.19
0.30
41.9
55.19
6.185
1.44
SRAC100
36.43
0.20
22.7
41.46
5.463
1.14
0.25
31.9
47.36
5.854
1.30
0.30
43.6
51.00
6.579
1.40
Note. σ0 represents the quasi-static compressive strength of the specimen; represents the average strain rate; σd represents the dynamic peak stress; εp represents the dynamic peak strain; and DIF represents the dynamic increase factor, DIF = σd/σ0.
