Author: haroonkhan
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Preparation of Surface for Plastering
Durability of plastering depends on its adhesion with the background. A good-background is one which has enough strength and plain enough for suitable application of plaster. Types of background are (i) Solid Background, (ii) Lathing and (iii) Boards and Slabs. 1. Solid Background The main characteristic of the solid background is that the nature of…
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PLASTERING
Plastering is the method of covering rough and uneven surfaces of the various components of a building with a plastic material (i.e., mortar which is called the plaster).
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INTRODUCTION
Building finishes comprise of plastering, pointing, painting, varnishing, white/colour washing or distempering. These finishes are performed to satisfy the following functions: Plastering is performed in majority of the cases and pointing is preferred in stone masonry and brick-masonry built by machine-moulded bricks. Painting, varnishing, white/colour washing or distempering are applied to different type of materials…
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Erection of Prefabricated Concrete Shell Elements
Prefabrication of shell units has been discussed in Chapter 9. Concrete shell elements, viz., doubly curved shells, cylindrical shells, etc. which are resting on load bearing structures of buildings are erected using cranes. Figures 25.18(a), (b) and 25.19 show the erection of short and long cylindrical shells and double curvature shells. Re-course is made to…
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Type of Shell Roofs
Based on the geometry of the middle surface, shells may be classified as: 1. Domes A dome is a type of roof of semi-spherical or semi-elliptical shape. The materials used for construction of domes are stone, brick or concrete. They are supported on circular or polygon shaped walls. Domes are preferred for covering large areas…
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SHELL ROOFS
A shell roof is a curved surface structure. It is relatively a thin slab which is curved in one or both directions. It is often stiffened along its edges to maintain its curvature. As a shell can cover large spans without interruption of columns, shell roof is becoming very popular for industrial buildings, research laboratories,…