ABSTRACT Conventional cement‐based concrete, while widely utilized in the construction industry, raises concerns regarding environmental sustainability and long‐term durability. In response, this study investigates the use of wollastonite microfibers as a partial replacement for cement to develop a more sustainable and mechanically efficient concrete. Wollastonite, a naturally occurring mineral with properties similar to cement, reacts with calcium hydroxide (Ca(OH) 2 ) in the concrete matrix to produce additional Calcium–Silicate–Hydrate (C–S–H) gel. This reaction, supported by the filler effect and residual silica, contributes to improved mechanical strength and durability. To evaluate the material's performance, concrete specimens were prepared with varying wollastonite contents (0%, 10%, 15%, and 20%) and subjected to compressive, tensile, and flexural strength testing. Results revealed that a 10% replacement level maintained strength comparable to conventional concrete, while a 15% substitution resulted in no significant deviation in performance. However, strength began to decline notably at 20% replacement. Furthermore, finite element simulations using ABAQUS were conducted to assess stress distribution in concrete overlays containing wollastonite microfibers. The simulations demonstrated enhanced load distribution and reduced stress concentrations, indicating improved structural performance and longer service life compared to traditional concrete and bituminous overlays. Overall, the findings suggest that incorporating wollastonite microfibers up to 15% can be a viable and eco‐friendly approach to improving concrete without compromising its mechanical integrity.
Rajbahadur et al. (Thu,) studied this question.