L-BOX

Material : M.S / S.S / Acrylic

The L-box test is used to measure the filling and passing ability of self-compacting concrete.This test was originally developed in Japan for underwater concrete, the test is also applicable for highly flowable concrete.

The apparatus consists of an L-shaped box, shown in Figure below. Concrete is initially placed in the vertical portion of the box, which measures 600 mm in height and 100 mm by 200 mm in section. A door between the vertical or horizontal portions of the box is opened and the concrete is allowed to flow through a line of vertical reinforcing bars and into the 700 mm long, 200 mm wide, and 150 mm tall horizontal portion of the box. In the most common arrangement of reinforcing bars, three 12 mm bars are spaced with a clear spacing of 35 mm. Generally, the spacing of the reinforcing bars should be three times the maximum aggregate size. It should be noted that various dimensions for the L-box have been used and no one set of dimensions is considered official; however, the dimensions described above seem to be the most common.