Reduction of Cement Consumption, Carbon Foot Print and Improvisation of Durability Performance of Concrete by using High Dosage of High Grade PCE based Superplasticiser

Abstract

Abstract: In present world global warming is one of the primary concern of the world community due to continuous increasing of carbon foot print since last few decades. Among the different source of carbon foot print in global atmosphere, cement industry alone contribute nearly 8% to the global anthropogenic CO2 emissions as 1 MT of cement production is generating nearly 0.87 MT CO2 to the atmosphere. Hence considering the threat of continuously increasing carbon foot print of the atmosphere number of ways were adopted for reduction of carbon foot print by many researchers in past like using of supplementary cementitious material (SCM) in production of concrete. But in the present research work it has been revealed that by using of high grade PCE based superplasticizer with an increased dosage has shown significant reduction in the consumption of cement with regards to strength requirement of concrete. Thus by reduction of cement consumption in concrete has shown significant reduction of carbon foot print generated from cement industry. On the other side the present research work has also revealed that, by using of high grade PCE based superplasticizer with an increased dosage helps to produce high workability & high performance concrete at very low w/c ratio. Thus because of using very low w/c ratio in concrete without impacting its fresh concrete properties there is a significant improvement has been noticed in hardened concrete properties like increase in strength of concrete, reduction in pore sizes of concrete resulting improvement of concrete durability performance. With regards to cost analysis of the proposal based on the present research work, it is found that using of increased dosage of superplasticiser in concrete is still found to be economic as compared to cost of concrete with high dosage of superplasticiser, as the cost reduction of concrete is higher due to higher amount of cement reduction in concrete as compared to extra cost of Superplasticizer in concrete beyond the optimum dosage of superplasticiser in concrete.