Specifications include, but are not limited to: Project Overview In pozzolanic substitution, replacement of cement in concrete translates to a significant reduction of carbon footprint. This substitution must be done without compromising the strength and durability of the concrete. If the simple use of higher percentages of limestone substitution do not compromise durability, it defines a sustainable practice. Moreover, if natural pozzolanic materials result in long term mechanical strength and durability, they too contribute toward increased sustainability. Due to the renewed interest seen nowadays in using natural and recycled materials-based pozzolans as a replacement for Portland cement, this project seeks to investigate the sustainability and resiliency of such a practice within pavements. Although much research has gone into pozzolanic substitution, there is a lack in the knowledge base regarding the sustainable limits in the use or inclusion of limestone in cementitious blends. Additionally, there is a missing link between limestone content and actual influence of the porosity of limestone that may have influence on absorption and possible desorption within the matrix.
