The joints between pre-cast concrete slabs contribute to the construction of continuously reinforced concrete slabs using pre-cast elements, thus considerably reducing the overall construction time and improving the construction quality of off-site manufacturing. A series of bending tests were conducted on specimens with six joint details. The six joint details included the lapped U-bars (LU), lapped U-bars with stainless-steel ties (LUS), lapped U-bars with T-shaped joints (LUT), lapped headed bars (LH), welded linear bars (WL), and lapped linear bars (LL), where LUS and LUT were proposed by this study. In order to compare the mechanical properties of U-bar, headed bar and linear bar joint, the six specimens were evaluated according to the bearing capacity, failure types, crack control, rigidity, and steel strain. The specimens with LUT had the highest bearing capacity (204.7 kN⋅m) that was 4.8 %, 8.9 %, 25.7 %, 45.2 %, and 42.7 % higher than the capacities of the LU (195.4 kN⋅m), LUS (188 kN⋅m), LH (162.8 kN⋅m), WL (141 kN⋅m), and LL (143.4 kN⋅m) specimens, respectively. The specimens with the U-bars had higher bearing capacity and displayed ductile failure whereas the specimens with the headed and linear bars had lower capacity and underwent brittle failure. Based on the experimental results, the LUT detail proved suitable for fabricating joints between pre-cast concrete slabs. The test results were compared with the calculation formula and the published tests. The specimens in this study represent an improvement upon the large-size, high-bearing-capacity specimens in the joint study.