Raw Materials
Limestone and clay are the chief raw materials used in the manufacture of Portland cement. Limestone provides calcium oxide. Clay gives silica, alumina and ferric oxide. Note: If lime is in excess, the cement cracks during setting and if it is less, the cement is weak in ..
Limestone and clay are the chief raw materials used in the manufacture of Portland cement. Limestone provides calcium oxide. Clay gives silica, alumina and ferric oxide. Note: If lime is in excess, the cement cracks during setting and if it is less, the cement is weak in ..Properties of Matter
A solid has certain characteristics: According to modern theory, the molecules of a solid are fixed in relation to each other. They vibrate in place, but do not wander around. This accounts for the fact that a solid keeps its own shape. Solids are usually crystalline. A solid is a crystalline subst..
Properties of Natural Rubber
Crude rubber is a tough and elastic solid. It becomes soft and sticky as the temperature rises. Its specific gravity is 0.915. The most important property of natural rubber is its elasticity. When stretched, it expands and attains its original state, when released. This ..
Magnetic Properties of Solids
Magnetic Properties of Solids - The magnetic properties of materials are a consequences of magnetic moments associated will individual electrons. The magnetic moment of an electron is due to its orbital motion and also due to its spin around its own axis. A moving elec..
Magnetic Properties of Solids - The magnetic properties of materials are a consequences of magnetic moments associated will individual electrons. The magnetic moment of an electron is due to its orbital motion and also due to its spin around its own axis. A moving elec..Comparative Properties of Metals and Non-Metals
A detailed comparison of properties of metals and non-metals is given in table. Property Metals Non-metals State of matter These are usually solid, except mercury, which is a liquid at room temperature. Gallium and Caesium melt below 30 . So if room t..
Applications of Elasticity
Mechanical properties like strength, stiffness (Rigidity), ductility, malleability and brittleness have to be carefully studied to select a material for a particular job. The metallic parts of machines should not be subjected to stress beyond the elastic l..
Mechanical properties like strength, stiffness (Rigidity), ductility, malleability and brittleness have to be carefully studied to select a material for a particular job. The metallic parts of machines should not be subjected to stress beyond the elastic l..Alloys
An alloy is a mixture of two or more metals fused together in molten state. Metals when melted tend to dissolve in one another forming alloys. The various properties of a metal like malleability, ductility, strength, hardness, resistance to corrosion and appearance can..
Alloys
An alloy is a mixture of two or more metals fused together in molten state. Metals when melted tend to dissolve in one another forming alloys. The various properties of a metal like malleability, ductility, strength, hardness, resistance to corrosion and appearan..
Polymers Introduction
Introduction - Polymers are macro-sized molecules of relatively high molecular mass, which find extensive use in our daily life. Polymers are large but single chain-like molecules in which the repeating unit derived from small molecules called monomers are covalently linked. Structurally, they are ..
Summary
All material is made from small moving particles called atoms. Materials can be solid, liquid or gaseous, depending upon the arrangement and freedom of movement of these particles. Diffusion is the movement of particles from a place of high concentration to a place of lo..
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