Effect of Addition of Carbon Dioxide During Mixing on the Properties of Concrete Produced Using OPC And PPC

Abstract

Due to the modernization of the world, we live in, cement manufacturing has increased dramatically in recent years. Cement production is the third-largest source of anthropogenic carbon dioxide CO2 emissions, behind fossil fuels and land-use change. Cement is the primary binding element in concrete, and as the concrete industry expands, so will CO2 emissions. Carbon dioxide, or CO2, is responsible for the majority of global greenhouse gas emissions. CO2's capacity to last longer than other greenhouse gases and the ease with which it can be produced has resulted in a high yearly estimate. Sequestered CO2 in concrete has the potential to reduce carbon emissions while simultaneously improving concrete's compressive strength. Carbon dioxide is sequestered during this procedure. As a result, reducing CO2 output while keeping up with the concrete industry's advancement is critical in the current era. CO2 sequestration has a role in this. It is a method in which CO2 is transformed into a mineral that is permanently trapped in concrete. With the main ingredient responsible for global 7% carbon dioxide emissions and with no such material around having the same strength and durability properties, the concrete is the second-highest industrial source of carbon dioxide on the planet. While the Nations are agreeing to limit the rise in average global temperatures to 2oC by taking immediate action to escalate cuts in carbon emissions at U N talks in 2010. The only way possible in achieving this goal is to sequester and reduce carbon emissions. And what else would be the best way to sequester and utilize the carbon dioxide emissions than to trap it in concrete forever. The carbon dioxide reacts with the hydrating cement to form calcium carbonate (CaCO3), which is trapped inside the concrete and enhances the compressive strength and durability. This study aims to find the effect of carbon dioxide injection during mixing on the properties of the concrete. It is evident from the study that by utilization of the optimum dosage of carbon dioxide in the concrete, the concrete tends to densify and thus the best performance is achieved. Clearly the properties like fresh, mechanical, and durability all have the positive effect due to the CO2 sequestration. Hence, it can be concluded that by the carbon dioxide sequestration we can save our planet by reducing the carbon footprint and also achieve the best performance economically.