Repainting wood work

Learn : Repainting wood work,Repainting Wood Furniture,Repainting Doors,Repainting Cabinetry,wood floors Repainting wood work (i)        If the old paint be unsightly, unsound, blistering or flaking off then it should be removed by the application of some paint remover, by scrapping or by burning the paint with a blow lamp. (ii)       On surface disfigured by smoke a coat […]

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Painting plastered surfaces

Learn : Painting plastered surfaces,New plastered surfaces Painting plastered surfaces (i)        A plastered surface should be painted only after it has thoroughly dried, otherwise the paint would get spoil. (ii)       To avoid sucking of paint by plaster soak the surface with a pore filling solution which will dry off leaving an impervious surface. A wash […]

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Painting new wood work

Learn : Painting new wood work : Knotting or killing the knot, Application of priming coat, Stopping, Application of finishing coats. Painting new wood work   Following points should be attended to before painting new wood work:   (i)        Only well seasoned timber should be painted otherwise not only shall the paint be spoilt but […]

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Removal of old paint and painting

Learn : Removal of old paint and painting : Remove the paint, old paint and painting Removal of old paint and painting REMOVAL OF OLD PAINT One of the following two methods could be employed to remove old paint from a surface : (i)        Burning the paint by directing the flame of a blow lamp on […]

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Preparation of oil paints

Learn :Preparation of oil paints Learn : Composition of oil paint PREPARATION OF OIL PAINTS. To get started making oil paint, you’ll need: 1) Cold-pressed, raw, or unrefined linseed oil – Linseed oil tends to do much of the heavy lifting in many oil based paint formulations. The reason is that unlike most plant based […]

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Characteristics of a good paint

Learn : Characteristics of a good paint,Paints, Paints Classification Characteristics of a good paint Paints Paints  are used to protect metals, timber or plastered surfaces from the corrosive effects of weather, heat, moisture or gases etc. and also to improve their appearance. Paints Classification Paints in common use are classified as oil paints, water paints, cement […]

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Composition of oil paints

Learn :Composition of oil paints: Base: White lead, Red lead, Zinc oxide (or zinc white), Iron Oxide, and metallic powders such as Aluminum, Copper and Bronze etc. are the commonly used bases,Vehicle: Oils most commonly used as vehicles are : Linseed oil, Poppy oil. Nut oil and Tung oil. Colouring pigments,Solvent or thinner,Drier,Inert filler Composition of […]

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Surkhi,Powdered broken brick (burnt brick)

SURKHI Surkhi,Powdered broken brick (burnt brick) locally called surkhi is used as fine aggregate in lime mortar. Surkhi,Powdered broken brick shall be prepared by finely grinding well burnt good quality bricks free from under burnt particles of soluble salts, pyrites and adherent coatings of soil or silt. The maximum quantity of clay, fine silt and […]

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Natural rubber,Treatments to improve and modify natural rubber properties

How To Learn rubber  : Natural Rubber(India Rubber),Treatments to improve and modify natural rubber properties,Reclaimed Rubber,Synthetic Rubber,Rubber flooring materials for general purposes RUBBER It is essentially an elastic material and is obtained both as natural and as synthetic material.  Natural Rubber (India Rubber). Natural rubber  is present as an emulsion in the latex of certain […]

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Thermocol Building material

 THERMOCOL Thermocol : It is the trade name of a very light and cellular plastic material. Initially it is obtained in liquid form and then molded into desired forms. it is an excellent insulating material of heat, sound and electricity. It is very light, strong and durable. It resists dampness. Its compressive strength is 117 […]

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Stones tests, weathering, durability, water absorption, compressive strength

Stones Tests Stones tests :weathering of natural building stones,durability of natural building stones, water absorption and porosity, determination of true specific gravity,compressive strength To know the suitability of building stones for meeting the specific requirements of different Engineering works the following few tests of stones may be performed. The tests of stones listed below meet […]

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Classification of rocks

Learn : Classification of rocks,Geological classification of rocks, Physical classification of rocks, Chemical classification of rocks CLASSIFICATION OF ROCKS Stones are obtained from rocks. A rock forms portion of earth’s crust having no definite shape or chemical composition. It is usually a mixture of two or more minerals and is not homogeneous.             Rocks from […]

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Building stones

Learn : Stones, Building stones,causes – Stone are gradually losing their universal use as a building materials, Uses – Stones are extensively used STONES Stone is a natural material of construction and is obtained from quarries. Since prehistoric days it has been used for constructing different components of buildings like foundations, walls, lintels, floors, roof […]

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Various types of bonds used in brick masonry

Content of this article : Types of bonds, Stretcher bond, Header bond, English bond, main features of English bond,Arrangement of Bricks in English Bond, Flemish bond, Dutch bond, Garden wall bond, Raking bond,Two varieties of raking bond viz., Diagonal bond and Herring bone bond, Facing bond. See also : Technical terms in masonry Comparison of Brick […]

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Different kinds of tiles and properties of good tiles

In this article Learn about: Tiles,different kinds of tiles,roofing tiles,plain tiles,pan tiles,pot tiles,allahabad tiles,mangalore tiles,concrete roofing tiles,flooring tiles or paying tiles,drain tiles,Properties of good tiles TILES Tiles are thin slabs used for covering roofs, for flooring or for making drains and may be formed of : (a) Brick-earth burnt in kilns and (b) Concrete. Brick-earth […]

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Fine Aggregates As per IS specification No. 1542-1960

Learn : Fine Aggregates As per IS specification No. 1542-1960: Sand,Kinds of sand,Pit sand or quarry sand,River sand,Sea sand,Crushed stone,Flyash. Fine Aggregates Particles of fine aggregates pass through 4.75 mm mesh and are entirely retained on 0.15 mm mesh. Most commonly used fine aggregates are sand, crushed stone, ash or cinder and surkhi. Aggregates that […]

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Fine and coarse aggregates in construction aggregates

Fine and coarse aggregates,cyclopean aggregates Fine and coarse aggregates,fine aggregate are inert materials mixed with a binding material like cement, lime or mud in the preparation of mortar or concrete. Fine and coarse aggregates shall consist of naturally occurring stones, gravel and sand and shall be hard, strong, dense, durable, clear and free from veins, […]

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10 precautions must be taken in storing cement

10 precautions must be taken in storing cement Following 10 precautions must be taken in storing cement : Portland cement is a finely ground material. It, therefore, readily absorbs moisture even from the atmosphere. It is therefore essential to protect it from dampness during storage. Lack of proper care may cause setting of cement or […]

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Different kinds of cement as per IS code

Learn : Different kinds of cement as per IS code :Rapid hardening or high early strength,Quick setting,High alumina,portland slag,Low heat,Air entraining Portland etc cement Different kinds of cement as per IS code Following are some of the Different kinds of cement as per IS code manufactured to suit the different requirements. Important Different kinds of […]

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Pozzolanas when added to lime make it hydraulic

Learn : Pozzolana, Natural Pozzolanas, Artificial Pozzolana,Clay pozzolana,cement sand mortars,  Pozzolana when added to lime make it hydraulic and the resulting mortar will be stronger. POZZOLANAS These are siliceous materials having siliceous material but no binding values within themselves, will chemically react with Calcium hydroxide at ordinary temperatures and in the presence of moisture to form […]

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