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Civil Engineering Classes How to calculate the materials for a circular RCC water tank In this illustration we will calculate cement, sand, crushed stone and of course steel for given water tank. RCC has 1:2:4 with 15 cm thickness PCC has 1:2:4 with thickness equal to 10 cm The slab is RCC having 1:2:4 with 10 cm thickness And of course there is a hole and the hole is circular with diameter = 60 cm The depth is equal to 3 cm The steel is 1% and #4 bar will be used Solution: Diameter = 4 meter + 2(15 cm) + 2 (10 cm) = 4.5 m = external circle diameter PCC work = πD2/4 * T = π (4.5)2/4 * 0.1 = 1.59 m3 Assume the base or floor as S1 and wall as S2 D2 = 4 meter + 2(15 cm) = 4.3 m The next approach is the RCC work in wall S1 = π (D1)2/4 * T = π (4.3)2/4 * 0.15 = 2.178 m3 RCC work in wall S2 = π ((D1)2 – (D)2)/4 * d = π ((4.3)2 – (4)2)/4 * 3 = 5.867 m3 RCC work in slab = π (4.3)2/4 * 0.1 = 1.452 m3 Deduction for hole = π (0.6)2/4 * 0.1 = 0.0282 m3 RCC work in Slab – ...

Civil Engineering Classes Top 100 Civil Engineering Interview Questions and its Answers 1) What is a Waffle slabs? Waffle slabs are a reinforced concrete footing and slab system constructed on ground. They consist of a perimeter footing (edge beam) and a series of narrow internal beams (strip footings) at one meter nominal centers running each way. The whole footing and slab system is constructed on top of the ground. 2) What is a mat foundation? A mat foundation, according to the Dictionary of Construction, is a continuous foundation with a thick slab that supports a whole structure. The foundation is shallow and poured over reinforcing mats. 3) What is a waffle pod concrete slab? The Waffle Pod Slab System is a better way of building concrete slabs for new homes, extensions or commercial industrial buildings. 4) How thick is the slab of a house? Around the edge of the slab, the concrete forms a beam that is perhaps 2 feet deep. The rest of the slab is 4 or 6 inche...