This article throws light upon the types of machining process. The types are:- 1. Shaping and Planning 2. Turning and Boring 3. Drilling and 4. Milling. It is necessary to have some exposure to the actual machining operations and their analyses. In this article, we shall not go into the extreme technological details and all possible types of operations, but [...]
We have given a brief description and analysis of each of the various basic forming operations. It is hoped that the reader has by now acquired some idea about these processes, especially about the mechanics involved. However, there are many minor and major variations of such processes. In this article, we shall discuss some of these along with the associated [...]
Following are the qualities or characteristics or requirements properties of a good building stone: 1. Crushing Strength: For a good structural stone, the crushing strength should be greater than 100 N/mm3. The approximate values of crushing strength of some of the stones are shown in table 2-1. 2. Appearance: The stones which are to be used for face work should [...]
The following tests are conducted for determining the qualities of a good building stone! (1) Acid test (2) Attrition test (3) Crushing test (4) Crystallisation test (5) Freezing and thawing test (6) Hardness test (7) Impact test (8) Microscopic test (9) Smith's test (10) Water absorption test. Each of these test will now be briefly described. 1. Acid Test: In [...]
In this article we will discuss about:- 1. Uses of Stones 2. Natural Bed of Stones 3. Dressing 4. Deterioration 5. Retardation 6. Preservation 7. Artificial Stones. Uses of Stones: The stones are used in the construction of buildings from the ancient times and most of the ancient temples and forts of our country were built with stones. The Taj [...]
In this article we will discuss about:- 1. Tools for Blasting 2. Materials for Blasting 3. Process of Blasting 4. Precautions. Tools for Blasting: Following tools are required in the process of blasting: (1) Dipper: This is shown in fig. 2-5 and it is used to drill a hole to the required depth. (2) Jumper: This is shown in fig. [...]
In this article we will discuss about:- 1. Definition of Quarrying 2. Sites for Stone Quarrying 3. Important Considerations 4. Methods. Definition of Quarrying: The process of taking out stones from natural rock beds is known as the quarrying. The term quarry is used to indicate the exposed surface of natural rocks. The stones, thus obtained, are used for various [...]
In this article we will discuss about:- 1. Manufacture of Common Tiles 2. Characteristics of a Good Tile 3. Types. Manufacture of Common Tiles: Following four distinct operations are involved in the general process of manufacturing the common tiles: (i) Preparation of clay (ii) Moulding (iii) Drying (iv) Burning. Each of the above operation will now be briefly treated. (i) [...]
List of commonly used ceramic products. Ceramic Product # 1. Clay Products: The clay occurs plenty in nature. The clay is a distinct product of chemical weathering of igneous rocks. The felspar is predominant in igneous rocks. One of the variety of felspar is orthoclase felspar. It is whitish, greyish or pinkish in colour. The rocks disintegrate easily, if orthoclase [...]
In this article we will discuss about:- 1. Meaning of Bricks 2. Composition of Good Brick Earth 3. Harmful Ingredients in Brick Earth 4. Classification of Brick Earth 5. Qualities of Good Bricks 6. Factors Affecting Quality of Bricks 7. Tests for Bricks 8. Classification of Bricks 9. Uses of Bricks 10. Colours of Bricks 11. Size and Weight of [...]