# Synergistic Utilization of Multi-Source Industrial Solid Wastes in Cementitious Materials: A Comprehensive Review

## TL;DR

This paper reviews how combining different industrial solid wastes in cement can improve sustainability and performance of building materials.

## Contribution

It provides a theoretical framework for synergistically using multi-source industrial solid wastes in cementitious materials.

## Key findings

- Synergistic effects in multi-component waste systems enhance mechanical properties and hydration kinetics.
- Alkali-mediated and sulfate-induced mechanisms drive structural and microstructural improvements.
- Technical constraints and future strategies for waste utilization in cement are identified.

## Abstract

The synthesis of cementitious binders incorporating industrial solid waste represents a strategic pathway toward achieving large-scale resource valorization. The synergistic utilization of binary and ternary solid waste systems has emerged as a prominent research field, leveraging the complementary physical and chemical attributes of diverse waste streams. This work systematically evaluates the synergistic effects within multi-component solid waste systems and analyzes their influence on the mechanical properties and hydration kinetics of cementitious matrices. Specifically, the underlying mechanisms of alkali-mediated structural evolution and sulfate-induced microstructural reinforcement are characterized to elucidate the collaborative interactions between different waste phases. Finally, the prevailing technical constraints in the application of multi-component wastes are identified, and strategic directions for future development are proposed. This study provides a vital theoretical framework for the high-volume and cost-effective utilization of industrial by-products as sustainable building materials, contributing to energy conservation and carbon footprint reduction within the construction industry.