L Box Test Apparatus for Self-Consolidating Concrete

L Box Test Apparatus for Self-Consolidating Concrete

L-Box Test Apparatus is an alternative method to determine flow and passing ability of self-consolidating concrete (SCC) mixes. This follows a standard procedure such as BS EN 12350-10 so results are consistent and reliable.

It is used in Europe and some DOT’s in the US have adopted the procedure or are looking at it (ASTM procedure is pending). There are different versions of the L-Box Test to suit different standards and testing needs.

It consists of a test box with a concrete reservoir (vertical hopper), a test basin (horizontal trough), a sliding gate and steel bars (or three obstacles) simulating reinforcement. The steel bars act as obstacles to simulate confined spaces and real world construction scenarios. Fresh concrete sample is poured into the concrete reservoir and allowed to settle to a certain level before it starts. Lifting the slide gate allows the concrete to flow past the obstacles into the horizontal section. A stopwatch is used to measure the time it takes for the concrete to flow through the obstacles. The flow is measured by recording the height (level) of concrete in the vertical and horizontal sections and the reach in the horizontal section is the key indicator of flowability.

It evaluates the filling ability of self compacting concrete and its resistance to segregation which is crucial for quality control. The L-Box Test is useful to assess flow rates and segregation resistance of self compacting concrete in confined spaces such as around steel bars or obstacles. The final depth at the gate and at the end of the trough is measured and the proportional difference is expressed as a blocking ratio.

Features:

• Another method to determine flow and passing ability of self-consolidating concrete

• Made of durable stainless steel

• Welded joints

Product Dimensions 8 x 24 x 32.5in (203 x 610 x 826mm), WxDxH

Material Stainless Steel

Product Manual