Chapter 1: Influence on hydration and microstructural properties of low carbon cementitious binder modified with water soluble polymer and fly ash -- Chapter 2: Montmorillonite content of expansive soils and its relationship with swelling and consistency properties -- Chapter 3: Computational modeling of wind flow in an urban environment: a case study navi mumbai -- Chapter 4: Time-frequency analysis of strong ground motions from the 2011 sikkim earthquake -- Chapter 5: The effect on concrete strength by partially replacing cement with brick kiln dust and fly ash.