Wednesday 15 April 2020

Basic knowledge for civil engineers

What is dead load ?
     The dead load is a self weight of the                beam column and doesn't change                    position during life of the construction           or structure. 

What is live load ?
      The live load is a weight of the person,           furniture and others stuffs which                    carries some weight on slab and there           loads are variable during the life of the          structure. 

Density of materials?
        
         Cement density = 1440 kg/meter cube

         Sand density      = 1650 kg/meter cube 

         Aggregate           = 1200 to 1750                                                           kg/meter cube 

                              PPC  = 2400 kg/meter cube 

                              RCC  = 2300 kg/meter cube 
                                          
                        Bricks    = 1600 to 1920                                                            kg/meter cube 

        Concrete block    = 2100 kg/meter cube 

                 Mortar         = 2080 kg / meter cube 

               Concrete        = 2300 kg/ meter cube 


What is the curing time period of                 construction.

           Opc = 10 days minimum

           ppc  = 7 days minimum 

Super sulphate cement = 7 days minimum 

Mineral and admixture added cement
                    = 14 days minimum 

De-shuttering time of formwork

      Column   = 16 to 24 hours 

       Rcc slab = 10 to 21 days 

       Rcc footing = 3 days

      Rcc beam bottom = 15 to 28 days 

What is scaffolding?
 Ans. Temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridge and all other man made structures. 

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