From: Experimental Study on Waterproofing Properties of Putty-Based Composite Rubber Strip for Underground Post-Tensioned Precast Concrete Structures
Post-tensioning step
Width of the joints (mm)
Mean value (mm)
Joint1
Joint 2
Joint 3
Joint 4
Initial value
20.26
19.06
23.58
24.51
21.85
3
14.63
14.11
11.74
13.98
13.62
6
12.73
12.36
9.14
9.68
10.98
9
10.10
8.28
7.13
6.76
8.06