Authors:
Narasimha Prasad, K.N.; S.V. Venkatesh;
Abstract:
The increasing demand for cement and its adverse impact on the environment are well known. Replacing cement partially with microfine wastes of construction and other industries is perceived to be a way forward in partially mitigating this situation. While binders like fly ash and ground granulated blast furnace slag are found to be good supplementary cementing materials, microfine stone dust, a waste by-product of the quarrying industry, is an inert material. It may not be a suitable material for such partial replacement if workability, as
well as mechanical and durability properties of concrete are to be retained at the original level. However, if such partial replacement is done together with a microfine cement produced by cement manufacturers, it could be a suitable replacement material. In this study, cement is partially replaced with stone dust (7.5%) and
microfine cement (5% -20%) and the effect of such replacement is studied on workability and mechanical properties of concrete. The study has indicated that partial replacement of cement with stone dust and microfine cement has great potential. At a replacement level of 7.5% stone dust and 15% microfine cement, the concrete has enhanced workability and mechanical properties, making these materials suitable replacement materials to achieve sustainable construction.
Keywords:
Reactive microfines, Inert microfines, Partial cement, Stone dust, Workability, Mechanical properties, Microfine cement