Building Materials.

        Building materials
  • There are different types of building materials which are used in construction work. 
  • Building material is any material which is used for construction work. 
  • Such as cement, sand, clay, timber, bricks, stone etc. are used in construction work. 
1.Cement:-  
  • Cement is a material which has cohesive & adhesive properties in the presence of water. 
  • Cement was invented by Joseph Aspdin of UK in 1824.
  • John Smeaton is considered as the father of Civil. 
  • Standard Density=1440 kg/m^3
  • Weight of one bag cement=50 kg
  • Volume= weight/density=0.0347 m^3
Major types of cement
  1. Hydraulic
  2. Non-hydraulic
  • Hydraulic:- Sets & Hardens in presence of water & results in water resistant product.  
      Ex:-Portland cement. 
  • Non-hydraulic:-Derived from calcination of gypsum or limestone. 
       Ex:-Plaster of Paris. 

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