Concrete Technology Questions

• Hydration of cement is due to chemical action of water with
• Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor is 0.95, the workability of concrete is
• The commonly used material in the manufacture of cement is
• Slump test is done for
• Internal friction between the ingredients of concrete, is decreased by using
• If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is
• The mixture of different ingredients of cement, is burnt at
• The ratio of the length to breadth of a wooden float, is
• The risk of segregation is more for
• For given water content, workability decreases if the concrete aggregates contain an excess of
• M 150 grade of concrete approximates
• For ensuring quality of concrete, use
• Proper proportioning of concrete, ensures
• Pick up the correct statement from the following:
• Workability improved by adding
• Concrete mainly consists of
• Permissible compressive strength of M 300 concrete grade is
• Construction joints are provided
• The high strength of rapid hardening cement at early stage, is due to its
• The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known