Influence of Limestone Fillers on the Properties of Concrete

Background & Objectives

Concrete is known to have a high environmental carbon footprint due to the high CO2 emissions involved during the production of cement, which is a key constituent in concrete. To move towards a phase of increasing sustainability, various approaches are being used, one of which is the partial substitution of cement in concrete by limestone fines. This approach leads to a positive impact on the environment and is also economically beneficial.

 

While reducing the cement in concrete, the properties (flowability and strength) of concrete are affected. The aim of this research was to assess how the addition of limestone fillers in concrete affected its characteristics, mainly the flowability and the compressive strength. The water content in concrete influences both the compressive strength and workability. A low water to cement ratio produces concrete with relatively high compressive strength with a low workability and vice-versa. Hence, the right trade-off between strength and workability had to be found. This could be achieved when the theory of particle packing was applied.

 

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