The L-Box test consists of an L-shaped container divided into a vertical and horizontal section. A sliding door separates the vertical and horizontal sections. An obstacle of three reinforcing bars can be positioned in the horizontal section adjacent to the sliding door. The vertical section of the container is filled with concrete and the sliding door is immediately removed, allowing the concrete to flow through the obstacle into the horizontal section, as shown in Fig. 2.11. The height of the concrete left in the vertical section (h;) and at the end of the horizontal section (h2) is measured. The ratio of h2/hi is calculated as the blocking ratio.
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Fig. 2.11 L-Box testing of SCC. |
