Table 1.

Results obtained from lap-shear tests, both for unstressed and prestressed specimens.

	Unstressed		Prestressed
	REF-US	FTC-US	REF-PS	FTC-PS
$F_u$ (kN)	28.23	20.53	33.14	21.57
$\Delta F_u$ (kN)	28.23	20.53	25.14	13.57
$s_{f,B}$ (mm)	0.23	0.13	0.22	0.093
${\displaystyle \frac{\Delta F_{u,ftc}}{\Delta F_{u,ref}}}$ (-)	0.73		0.54
${\displaystyle \frac{F_{el}}{s_{f,B,el}}}$ (kN/mm)	316.0	289.8	1057.4	716.8