Slump Test Lab Report

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CHAPTER NO. 4 EXPERIMENTAL SET-UP Different Tests and Equipment 4.1 Slump-flow test 4.2 L-box test 4.3 U-box test 4.4 V-funnel test 4.5 Compressive strength test 4.1 SLUMP FLOW TEST The slump flow is used to assess the horizontal free flow of SCC in the absence of obstructions. It was first developed in Japan for use in assessment of underwater concrete. The test method is based on the method for determine the slump. The diameter of the concrete circle is a measure for the filling ability of the concrete. 4.1.1 Equipment The apparatus is shown in figure. • Mould in the shape of a truncated cone with the internal dimensions 200mm diameter at the base, 100mm diameter at the top and a height of 300mm. • Base plate of stiff…show more content…
• Fill the apparatus completely with concrete without tamping, just we strike off the concrete level with the top with the trowel. • Open the trap door 5 minutes after the second fill of the funnel and allow the concrete to flow out under gravity. • We simultaneously start the stopwatch when the trap door is opened and record the time for the discharge to complete (the flow time at T 5 minutes). 4.3 L –BOX TEST METHOD The test assesses the flow of the concrete, and also the extent to which it is subject to blocking by reinforcement. The apparatus consists of a rectangular –section box in the shape of ‘L’, with a vertical and horizontal section, separated by a movecapcapable gate, in front of which vertical lengths of reinforcement bar are fitted. 4.3.1 Equipment The apparatus is shown in figure. • L -Box of a stiff non absorbing material. • Trowel, and • Scoop. FIG. NO. 4.3 L-BOX TEST SET-UP 4.3.2 Procedure • Took around 14 litres of concrete to perform this test. • Set the apparatus in a firm ground and ensure that the sliding gate can open freely and then close

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