The embankments are constructed with locally available soils, provided it fulfils the specified requirements. Procedure of compaction to be adopted will depend on the type of soil being used in construction. General guidelines to deal with compaction of various types of soils for attaining optimum dry density/relative density at minimum effort, have been briefly given … Read more
When a Portland Slag cement is tested for its physical requirements, then it must satisfy the following specifications given by IS 12269. The fineness value of PSC when tested by Blaine’s air permeability method shall not be less than 225 m2/kg. The expansion value (i.e. soundness) of unaerated cement when tested by Le-Chaelier method shall … Read more
When a calcined clay based Portland Pozzolana cement is tested for its physical requirements, then it must satisfy the following specifications given by IS 1489-Part 2. The fineness value of fly ash based PPC when tested by Blaine’s air permeability method shall not be less than 300 m2/kg. The expansion value (i.e. soundness) of unaerated … Read more
When a fly ash based Portland Pozzolana cement is tested for its physical requirements, then it must satisfy the following specifications given by IS 1489-Part 1. The fineness value of fly ash based PPC when tested by Blaine’s air permeability method shall not be less than 300 m2/kg. The expansion value (i.e. soundness) of unaerated … Read more
When a RHPC (Rapid Hardening Portland cement) is tested for its physical requirements, then it must satisfy the following specifications given by IS 8041. The fineness value of RHPC when tested by Blaine’s air permeability method shall not be less than 325 m2/kg. The expansion value (i.e. soundness) of unaerated cement when tested by Le-Chaelier … Read more
When a 53 grade ordinary Portland cement is tested for its physical requirements, then it must satisfy the following specifications given by IS 12269. The fineness value of 53 grade OPC when tested by Blaine’s air permeability method shall not be less than 225 m2/kg. The expansion value (i.e. soundness) of unaerated cement when tested … Read more
When a 43 grade ordinary Portland cement is tested for its physical requirements, then it must satisfy the following specifications given by IS 8112. The fineness value of 43 grade OPC when tested by Blaine’s air permeability method shall not be less than 225 m2/kg. The expansion value (i.e. soundness) of unaerated cement when tested … Read more
When a 33 grade Ordinary Portland cement is tested for its physical requirements, then it must satisfy the following specifications given by IS 269. The fineness value of 33 grade OPC when tested by Blaine’s air permeability method shall not be less than 225 m2/kg. The expansion value (i.e. soundness) of unaerated cement when tested … Read more
The international Bureau of Weights and Measures serve as a depository for the primary international standards and as a laboratory for certification and inter comparison of national standard copies. It is based in Sevres, France. In 1960, the SI system was built upon the metre-kilogram-second system, which has seven basic units. They are: Metre: (Unit … Read more
Steps Involved in Brick Manufacturing Manufacturing of bricks consists of the following 4 operations or steps. Preparation of brick clay or brick earth Moulding of bricks Air drying of bricks Burning of bricks 1. Preparation of brick clay or brick earth In this step the soil is excavated in steps and then laid on leveled … Read more