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Civil Diary Online Split tensile strength test of concrete Split tensile strength test is a method of determining the tensile strength of concrete using a cylinder which splits across the vertical diameter. It is an indirect m ethod of testing tensile strength of concrete. The tensile strength of concrete is one of the basic and important properties. Splitting tensile strength test on concrete cylinder is a method to determine the tensile strength of concrete. The concrete is very weak in tension due to its brittle nature and is not expected to resist the direct tension. The concrete develops cracks when subjected to tensile forces. Thus, it is necessary to determine the tensile strength of concrete to determine the load at which the concrete members may crack. AIM: To determine the splitting tensile strength of cylindrical concrete specimens. Apparatus : Testing Machine  - The testing machine may be of any reliable type, of sufficient capacity for the tests and capa...

Civil Engineering Classes Cement, Aggregate & Sand quantity are used in 1:1.5:3 concrete.....  Dry Volumn Concrete = Approximate 54 % to 57 % more than Wet Volumn Concrete. so, considering the factor of safety ranging from 1.54 to 1.57 to counter that shrinkage.  i.e., Volume of dry concrete = 1.54 to 1.57 times Volume of wet concrete

Civil Engineering Classes      Uses of Dams with Examples dam  is a constructed barrier that holds back water and raises its level. The important uses of dams have made it a matter of great concern for human civilization. What are Dams Used for There are many dams in this civilized world. Although the main function of these dams is to hold water back, they often provide additional useful facilities. Major dam uses are discussed below. Water Supply Water stored in reservoirs of the dam is used to provide adequate amounts of quality freshwater to residential, industrial facilities and mining sites. Dams can be used to regulate the flow of water in rivers. This is to say that water can be released from the reservoir to support wildlife and ecosystems downstream during a drought, and water can be released for agricultural uses during the same drought. Example: Warragamba, a water supply dam of Australia, supplies water to more than 3.7 million people living in Sydn...

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...