L-Box Test Lab Report
Abstract --- Reutilization of waste materials in the building industry helps to prevent environmental pollution whilst contributing to the design of more economical buildings. Over the years, there has been increase in the accumulation of tyre rubber due to the increase in the production of vehicles. Sometimes this waste tyre rubber is burned which leads to environmental pollution. So the use of this type waste tyre rubber for the replacement of aggregates in concrete leads to the decrease in the accumulation of waste tyre rubber and also reduces pollution. Another problem that we are facing is the durability of concrete structures. In order to get durable structures adequate compaction by skilled workers is required. Now a day there is a reduction in skilled workers. This leads
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It includes the discharge time measurement of fresh SCC with its self-weight from the narrow mouth of funnel designed specially. This funnel is called as V-funnel. This test is a self-compactibility test to measure the capacity of concrete to pass into the spaces. This test determines the viscosity and passing capacity of SCC. Fresh SCC is filled to the funnel without any compaction or vibration and then the sliding cover under the funnel is opened and the filling time of all concrete in the funnel to the pail is recorded.
Fig. 2 V-funnel test
L-box test
L-box test is used to assess the passing ability of SCC to flow through tight openings including spaces between reinforcing bars and other obstructions without segregation or blocking. The principle behind this test is to measure the volume of fresh concrete which is allowed to flow horizontally through the gaps between vertical, smooth reinforcing bars and the height of the concrete beyond the reinforcement is measured. Height of the horizontal section of the box measured as H2 mm. The depth of concrete immediately behind the gate measured as H1 mm.
Fig. 3 L-box test
U-Box
It includes the discharge time measurement of fresh SCC with its self-weight from the narrow mouth of funnel designed specially. This funnel is called as V-funnel. This test is a self-compactibility test to measure the capacity of concrete to pass into the spaces. This test determines the viscosity and passing capacity of SCC. Fresh SCC is filled to the funnel without any compaction or vibration and then the sliding cover under the funnel is opened and the filling time of all concrete in the funnel to the pail is recorded.
Fig. 2 V-funnel test
L-box test
L-box test is used to assess the passing ability of SCC to flow through tight openings including spaces between reinforcing bars and other obstructions without segregation or blocking. The principle behind this test is to measure the volume of fresh concrete which is allowed to flow horizontally through the gaps between vertical, smooth reinforcing bars and the height of the concrete beyond the reinforcement is measured. Height of the horizontal section of the box measured as H2 mm. The depth of concrete immediately behind the gate measured as H1 mm.
Fig. 3 L-box test
U-Box