CIVIL YAAR

INTRODUCTION The development of welding technology in 1940s has considerably reduced the riveted joint applications. Welding is the method of locally melting the metals (sheets or plates – overlapping or butting) with intensive heating along with a filler metal or without it and allowing cooling them to form a coherent mass, thus creating a joint. A typical weld showing various zones of weld is shown in Fig. 7.1. Such joints can be created to make structures, boilers, pressure vessels, etc. and are more conveniently made in steel. The progress has been made in welding several types of steels, but large structure size may impede the use of automatic techniques and heat treatment which becomes necessary in some cases. Welded ships were made in large size and large number during Second World War and failures of many of them spurted research efforts to make welding a better technology. ADVANTAGES OF WELDED CONNECTIONS The gross sectional area of the welded members is effective since the we...

⇒  Concrete brick  is a mixture of cement and aggregate, usually sand, formed in molds and cured. Certain mineral colours are added to produce a concrete brick resembling clay . ⇒What are the uses of cement bricks? Cement bricks have many advantages, making them a good choice for construction across many environments and applications. cement bricks can be used to build homes as well as garden structures such as retaining walls, and driveway and walkway paving. Furthermore, they are frequently used in the construction of low-cost housing for the numerous reasons listed below. Bricks manufactured using concrete are typically cheaper than clay bricks, both to make and to build with, and are much stronger than ordinary bricks. The crushed stone that goes into the manufacture of cement bricks is often what gives them their strength. They are also highly durable and low maintenance. Often, the concrete continues to cure even after manufacture thus making the cement bricks even stron...