The slump apparatus is made of steel in the shape of a truncated cone having a lower diameter of 20 cm, an upper diameter of 10 cm and a height of 30 cm. the internal 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 16 mm diameter steel rod, 0.6 m long , rounded at one end 25 times. Finally the concrete is leveled with a trowel. The mold is immediately removed from the concrete by slowly lifting the mold in a vertical direction. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get original essay Collapse is measured in terms of millimeters of concrete settlement during the test, the experimental setup is as shown in Fig x. The compaction factor apparatus has an upper hopper with 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 an upper internal diameter of 22.9 cm, a lower internal diameter of 12.7 cm and an internal height of 22.9 cm. the cylinder at the base has an internal diameter of 15.2 cm and an internal height of 30.5 cm. The lower ends of the hoppers are closed with hinged hatches well secured with quick release devices. The concrete sample is placed on the upper hopper and leveled. The trap door is opened to allow the concrete to fall into the lower hopper. After the concrete has stopped, 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 recorded. The same cylinder is filled with concrete of the same sample in a layer about 5 cm deep and heavily rammed. The ratio of the weight of partially compacted concrete to the weight of fully compacted concrete is referred to as the compaction factor. The flow table apparatus has a truncated cone-shaped metal casting 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 raising and lowering to a height of 12.5 mm at a rate of 15 times every 15 seconds. The mold is filled with concrete in two layers, each layer is released with 25 shots. The mold is removed and the concrete is vibrated. The average diffusion of the concrete is measured.