Microstructural Analysis of Recycled Aggregate Concrete using MicroSilica | Original Article
Many researchers have attempted to prepare concrete mixes with partial replacement of virgin aggregates with recycled ones. This research paper proposes the after-effects of using Microsilica (MS) to improve the microstructural properties of recycled aggregate concrete (RAC). Portland pozzolona cement (PPC) was replaced with 15 of Microsilica (MS) by weight. Cube specimens were prepared by replacing virgin aggregates with recycled ones in percentages of 25, 50, 75 and 100 with constant water cement ratio of 0.55. Microstructural properties were studied using Scanning Electron Microscopic (SEM) images. Consistent improvement in Interfacial transition Zone (ITZ) width was observed at 25 replacement of virgin aggregates with recycled ones along with Microsilica. Repacement proportion of virgin aggregates with recycled ones upto 25 is proposed as the optimum percentage.