**3. Experimental Procedures**

#### *3.1. Experimental Design*

The objective of this test was to investigate the influence of the SSAWC and LCSS on the performance of the specimens, as well as the impacts of parameters such as the segment concrete strength and filled concrete thickness on the bearing capacity of the strengthened specimens. Therefore, the experimental design was carried out according to the test objectives.

#### 3.1.1. Specimens Design



**Table 3.** Parameters and grouping of specimens.

Note: \*1: D × H = the diameter and height of the unreinforced specimen. \*2: ACSC = axial compressive strength of concrete.
