Split tensile strength. The split tensile strength values after a
28-day moist curing period are shown in Fig. 5. For specimens with
the same w/c ratio, the split tensile strength increased with the
pore-filling paste ratio. The concrete with a 0.35 w/c ratio and an
80% filling ratio had the highest split tensile strength value, at
1.40 MPa. The value of the split tensile strength of concrete was
approximately 1/9 of the value of the compressive strength.