The subsidence device is made of steel in the form of a truncated cone having a lower diameter of 20 cm, an upper diameter of 10 cm and a height of 30 cm . the inner surface of the mold is made smooth and clean. The mold is placed on a smooth horizontal surface, filled with concrete in four layers each about a quarter of the height of the mold and each layer is stamped with a steel rod 16 mm in diameter and 0.6 m long rounded at one end 25 times. At the end, the concrete is leveled with a trowel. The mold is immediately removed from the concrete by slowly lifting it in the vertical direction. Say no to plagiarism. Get a tailor-made essay on “Why Violent Video Games Should Not Be Banned”? Get the original test Slump is measured in terms of millimeters of concrete slump during testing, the experimental setup is as shown in figure x. The compaction factor apparatus has a top hopper having a top inside diameter of 10 inches, a bottom inside diameter of 5 inches, and an inside height of 11 inches. the lower hopper has a top internal diameter of 9 inches, a bottom internal diameter of 5 inches, and an internal height of 9 inches. the cylinder at the base has an internal diameter of 6 inches and an internal height of 12 inches. The lower ends of the hoppers are closed with tight-fitting hinged hatches with quick-release latches. The concrete sample is placed on the upper hopper and leveled. The hatch is opened so that the concrete falls into the lower hopper. Once the concrete has rested, the lower hopper hatch is opened and the concrete can fall into the cylinder. The excess concrete remaining above the level of the top of the cylinder is cut off with a trowel. The weight of the partially compacted concrete is noted. The same cylinder is filled with concrete from the same sample in a layer approximately 5 cm deep and heavily tamped. The ratio of the weight of partially compacted concrete to the weight of fully compacted concrete is noted as the compaction factor. The flow table apparatus has a metal casting in the shape of a truncated cone with a base of 25 cm in diameter, a top diameter of 17 cm and a height of 12 cm. the flow table is capable of moving up and down to a height of 12.5 mm at a frequency of 15 times every 15 seconds. The mold is filled with concrete in two layers, each layer being cleared of 25 strokes. The mold is removed and the concrete is vibrated. The average spread of concrete is measured.