3.1.3. Loading Design

Based on the estimation of the bearing capacity of the specimens, a 300 t pressure loading instrument was used. Firstly, the pressure was loaded at 15 kN/min. Then, when the load exceeded 50% of the bearing capacity, the displacement was loaded at 0.06 mm/min until the failure of the specimen.

#### *3.2. Specimens Preparation*

#### 3.2.1. Materials and Properties



**Table 4.** The mix ratio of the concrete (kg/m3).


3.2.2. Production Process


caused by unbalanced loading, the areas with lengths measuring 35 mm were reserved without strengthening at the top and bottom of the specimens.

**Figure 5.** Unreinforced specimens. (**a**) Specimens pouring; (**b**) Completed specimen.
