Eco-friendly Brick Technology Analysis: Resource Utilization of Construction Waste and Industrial Solid Waste

Eco-friendly Brick Technology Analysis: Resource Utilization of Construction Waste and Industrial Solid Waste

Utilizing construction waste and industrial solid waste to produce eco-friendly bricks has become an important green transformation direction for the building materials industry. The core of this technology lies in transforming traditionally waste materials into wall materials that meet building requirements through scientific processing and formula design, achieving a resource cycle of "turning waste into treasure."

The technical path mainly consists of three stages: First, the pretreatment and grading of waste materials. Construction waste (such as concrete blocks and waste bricks and tiles) needs to undergo crushing, screening, and impurity removal (removing wood, plastics, etc.) to obtain clean recycled aggregates; industrial solid waste (such as fly ash, slag, and desulfurized gypsum) needs to be ground and sorted to adjust its fineness and activity. These processes ensure the homogeneity and stability of the raw materials, which is the foundation for producing high-quality products.

Second, the core is the component ratio and optimized design. This is not a simple mixture of waste materials, but a precise formula based on materials science. For example, recycled aggregate is used as the main framework, supplemented with cement or lime as a binder, and the activity of fly ash is utilized for activation. Sometimes, a small amount of admixture is added to improve workability or enhance early strength. The goal of the formulation is to maximize the proportion of solid waste residue while ensuring the product's strength, durability, and other hard indicators, sometimes even reaching over 80%.

Finally, suitable molding and curing processes are crucial. Due to the complex composition of the waste materials, high-pressure molding (such as hydraulic brick presses) or extended vibration time is often required to ensure the initial density of the brick blank. The curing process is also critical, often using steam curing to activate the potential activity of industrial waste residue, promoting its hydration reaction with the binder, thereby shortening the curing cycle and improving the final product performance.

This technology not only disposes of a large amount of solid waste and reduces the environmental burden, but the environmentally friendly bricks produced also typically have advantages such as light weight and good thermal insulation. Its successful promotion depends on a stable waste supply system, mature production process control, and the final product needing market and standard approval. With the tightening of environmental protection policies and the deepening of the concept of circular economy, using waste to produce environmentally friendly bricks is undoubtedly a solid foothold for sustainable development in the construction industry.