Research Progress and Application of Solid Waste Foam Concrete: A Comprehensive Review

As a new green building material, foam concrete not only has low deadweight and good thermal insulation performance, but also can add solid waste to reflect the principle of green environmental protection and resource reuse. However, the differences in the types and amounts of solid waste will significantly affect the performance of materials. Based on the systematic analysis of literature from around the world in the past five years, this paper introduces some kinds of fine aggregate substitutes in solid waste foam concrete, and summarizes the effects of expanded vermiculite powder, recycled concrete aggregate, and palm oil fuel ash on the performance of foam concrete. The research shows that the incorporation of these three kinds of solid wastes can improve the internal pore structure of foam concrete, thereby improving its mechanical properties and microscopic performance. Finally, the application of solid waste foam concrete in construction engineering is further discussed, and the development direction of future research is prospected.