Construction

Types of cement   Beside the ordinary Portland cement or number of other type of cement are also manufactured by varying the ratio of the raw material or by adding some additional materials   In additional to ordinary cement the following are the other important varieties of cement available in the market Quick setting cement Rapid hardening cement High alumina cement Blast furnace cement Low heat cement White cement Coloured cement Sulphate cement Expanding cement Pozzolana cement Hydrophobic cement Waterproofing cement Acid resistant cement   Each of the above variety of cement will now be discussed in brief Quick setting cement   It is produced by adding a small percentage of aluminium sulfate and by finally grinding the cement   It contain very little or no retarding substance like gypsum   The setting action of the cement starts within a 5 minutes after addition of water and cement becomes hard in...

Properties of Cement   Following are the properties of cement  Physical properties  Mechanical properties  Chemical properties  Cement Physical properties Physical Properties Of Cement   following are the main physical properties of a good cement  physical properties primaries depend upon its chemical composition thoroghness of during and finess of grinding Fitness   the finer the cement in grain size the better is its quality  it is believed that in final grain size the cement particle react with the water more quickly and third reduce the time for hardening thereby producing a cement of high early strength Soundness   cement expand show some extent on setting  this expansion is sometimes responsible for cracking of cement after setting  sound as is the capacity of cement to from a non district grating hard and uniformly strong mask on  setting Setting of cement   it may be defined as t...

Introduction   Cement is a binding material  It is one of the most important engineering material of civil engineering  In almost all type of civil engineering works ,cement is used  The the ordinary cement which we commonly used is known as Portland cement  Cement in general can be divided into two types Natural cement and Artificial cement Natural cement is manufactured by during and crushing to powder the limestone containing 20-40% of clay and the remaining percentage of calcium carbonate ,magnesium carbonate etc The cement is brown in colour and sets very quickly when mixed with water The artificial cement is the which is obtained by the calcination of an intimate mixture of about 55 % calcium carbonate and 35% of clay When cement is mixed with water it form of paste which hardness and binds aggregates like sand gravel and crushed rock together to form a hard durable mass called concrete Ingredients of Portland cement Sr.no Name of ingredients Percent by we...