The main reinforcement of a RC slab consists of 10 mm bars at 10 cm spacing. If it is desired to replace 10 mm bars by 12 mm bars, then the spacing of 12 mm bars should be

What is the value of the Whitney stress block parameter, β1, for 6000 psi concrete?

1. What component of concrete that has affect its strength largely? Explain. 2. If you have to choose, an expensive high quality concrete or a less expensive with low quality concrete? Explain. 3. To reduce corrosion on steel reinforcement, what you have to consider in the design? 4. A 300mm X 500mm concrete beam with a 25mm diameter reinforcing bar spaced at 50mm o.c will be constructed using a non-air entrained concrete. The design compressive strength at 28 days is 30 MPa. Design a concrete mix for the beam. The properties of the aggregates and cement to be used are given in the table below. Use a trial batch of 0.15 m3. Specific Gravity Absorption Moisture content Coarse aggregate 2.75 (SSD) 1.2% Fine aggregate Cement 2.56 (SSD) 3.15 2.5% 2.5% 4.5% Unit weight (dry 1750 kg/m3 rodded) FM 2.45

hello please answer the question write in the image thanks