![]() Dressing: Giving the required shape to the stone is called dressing. If it is porous rainwater enters the pour and reacts with stone and crumbles it. In higher altitudes, the freezing of water in pores takes place and it results in the disintegration of the stone.ħ. Porosity and Absorption: Building stone should not be porous. The specific gravity of good building stone is between 2.4 and 2.8.Ħ. Specific Gravity: Heavier variety of stones should be used for the construction of dams, retaining walls, docks, and harbors. The vibrations may be due to the machinery mounted over them or due to the loads moving over them. The stone aggregates used in the road construction should be tough.ĥ. Toughness: Building stones should be tough enough to sustain stresses developed due to vibrations. Hardness: The stone used in floors and pavements should be able to resist abrasive forces caused by the movement of men and materials over them.Ĥ. Durability: Stones selected should be capable of resisting adverse effects of natural forces like wind, rain, and heat.ģ. However in case of a large structure, it may be necessary to check the strength.Ģ. Ordinarily this is not of primary concern since all stones are having good strength. ![]() Strength : The stone should be able to resist the load coming on it. The following are the requirements of good building stones:ġ. This is very much required in the case of laterite stones.Īlso, read: What Is Isometric Projection | Principle of Isometric Projections | Isometric Scale Requirements of Good Building Stones The best way of seasoning is to allow it to the action of nature for 6 to 12 months. The process of removing moisture from pores is called seasoning. The strength of the stone improves if this moisture is removed before using the stone. The stones obtained from the quarry contain moisture in the pores. Hence an engineer should look into sufficient strength rather than high strength while selecting stones for building works. The dressing is easy in stones with lesser strength. The cost of dressing contributes to cost of stone masonry to a great extent. ![]() Argillaceous materials, though poor in strength, are good in resisting fire. Toughness index 13 to 19 are considered medium tough and stones with toughness index less than 13 are poor stones. ![]() Structured stones should be easily dressed and suitable for super-structure. The structure of the stone may be stratified (layered) or unstratified. The following properties of the stones should be looked into before selecting them for engineering works:Īlso, read: What Are Walls | Classified of Walls | Load-Bearing Vs Partition Walls 1. Properties of Stones: Porosity and Absorption ![]()
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