30-08-2017, 11:22 AM
The bubble cover, which is another name for slabs whose core is embedded with spherical balls that can be of various shapes and sizes is a technology that is gaining current awareness around the world as a result of its enormous positive effects on one whole structure; this includes its light weight, economy and flexibility in terms of slab span. This research focused on the use of bubble cover in construction. The grade M30 of concrete was used. Three plates were cast, two with spherical bubbles and the other without bubbles. The slab without bubbles (the conventional slab) was molded with (183.35 kg) of concrete. In the slabs with bubbles spherical balls of 90 mm in size are available, in which 164 kg of concrete were used and the other of spherical balls of 120 mm of thickness, in which 151.54 kg of concrete and B / H of 0.60 and 0.80 having 35 and 16 spherical balls respectively. The results of the experimental tests indicate that the conventional slab supports a load of 424.95 KN and causes a deflection of 12.1 mm with the crack occurring after a load of 164KN. Bubble cover slab with B / H ratio 0.60, led load of 350 KN and causes deflection of 12.64 mm with crack occurring after a load of 168 KN. The last slab of bubble housing with B / H ratio 0.80, carried a load of 398.2KN and causes deflection of 13.3mm with crack occurring after a load of 300KN. A total of 10.55% of concrete was stored in the first slab of Bubble Cover and 17% of concrete was saved in the second. This means that the bubble cover plates have less load capacity compared to the conventional slab.