STANDARDIZATION OF CEMENT MORTAR

Civil Engineering Department

Gore S. L., Tanawade A. G.,Dhonde H. B. and Mahajan M. A.Vishwakarma Institute of Information Technology, Pune



ABSTRACT

    The Government has introduced limitations on the mining of natural sand from rivers in an effort to protect the natural environment. This has escalated the cost of river sand. The substitute to this has been used as secondary filler viz.crushed sand.The river sand is being replaced by crushed sand and a secondary filler material - viz. Stone Dust, Ground Granulated Blast Furnace Slag and Marble Powder. This replaced mortar is widely used in the construction industry but limited only for non-structural wall construction as a bonding layer between bricks / blocks. The application of such mortar for plaster work has many technical limitations. The objective of this work is to study the effect of adding waste material to the cement mortar on enhancing its mechanical properties and durability.The experimental investigation is carried out to investigate the properties of the mortar in fresh and hard ened state.The compressive strength, split tensile strength and flexure strength are studied.The selected optimum mortar mix is used at NYATI site.


Summary

    The following are the observation of the ongoing study :

  • 100 % crushed sand with 20% GGBS gives compressive strength 35.14 N/mm.
  • Optimum amount of colloidal nano silica is near about 3%.
  • Replacement of river sand is possible and final study will prove the optimum and effective mix design for themortar mix.