Civil Engineering Interview Tips:
In this Chapter 1 we have shared the important points to remember during attending the Civil Engineering Interviews. This chapter is mainly dealing with the “Bricks“. This article is mainly for fresher Civil Engineers and Job Seekers. This article is also really useful for attending the Private and Govt interviews. This give the recall and revision of your Civil Engineering subjects and will enhance the basic knowledge of our Civil Engineering.
Important Points to remember:
- Purest clay consists of mainly kalonite with small quantities of minerals such as quartz, mica, felsper, calcite and magnesite.
- Standard size of bricks also known as modular bricks should be 19x9x9 cm and 19x 9×4 cm. When placed in masonry the 19x9x9cm brick with mortar become 20x10x10cm.
- On field practice the bricks is classified into four types namely First, Second, Third and Fourth class bricks.
- The first class bricks water absorption is should be 12-15% of its dry weight.
- Crushing strength of the First class bricks should not less than 10 N/mm2
- The Second class bricks water absorption is should be 16-20% of its dry weight.
- Crushing strength of the Second class bricks should not less than 7 N/mm2
- Third class bricks are under burnt and having water absorption capacity of 25% of its weight. It is used for temporary structures.
- Fourth class bricks are over burnt and used as ballast.
- Based on Strength as per BIS, the bricks classified into 11 types namely – 35, 30, 25, 20, 17.5, 15, 12.5, 10, 7.5, 5, 3.5.
- On the basis of burning the bricks are classified into Pale bricks, Body Bricks and Arch bricks
- Ingredient of good brick earth – Silica 50 – 60%, Alumina 20 – 30%, Lime – 10%, Magnesia <1%, Ferric oxide < 7%, Alkalis < 10% and CO2, SO3 and water as small quantities.
- Iron Oxide gives red colour to bricks
- Manufacturing process of Bricks – Preparation of Brick earth – Moulding – Drying – Burning – Bricks
- Preparation of Brick earth step by step process – Unsoiling – Digging – Weathering – Blending – Tempering.
- Tests on Bricks
- Dimension test
- Water absorption test
- Compressive strength tests
- Warpage test
- Efflorescence test
- Size, Shape and Colour test
- Soundness test
- Structure test
Tags: Civil Engineering interview tips, Civil Engineering basic knowledge, Interview guide, Civil Engineering important points remember while attending the interview, Fresher, Civil Engineers, Job seekers, Civil Engineering Interview, Interview,Civil Engineering Interview guide, Final year college students, Bricks, bricks important Points.