Solid Waste Cementitious Materials Passes Acceptance, Boosting Green Transformation

As a core admixture in the construction materials industry, ultrafine powder, especially composite ultrafine powder made of mineral powder and fly ash, has been widely concerned and promoted with the deepening of global green low-carbon development and the upgrading of construction engineering quality requirements. With the increasing emphasis on environmental protection and resource recycling, the high-value utilization of industrial solid wastes has become a key direction for the transformation and upgrading of the construction materials industry, and solid waste cementitious materials, as an important carrier of this concept, have ushered in a new development opportunity.

Recently, the key R&D project "R&D and Road Application Research of Key Technologies for Preparation and Performance Regulation of Total Solid Waste Cementitious Materials" led by Ningxia Transportation Construction Co., Ltd. successfully passed the acceptance organized by relevant departments. The acceptance team conducted a comprehensive inspection and evaluation on the project’s technical achievements, product performance, engineering application effect and industrialization level, and confirmed that the project has achieved important breakthroughs in key technologies, with remarkable economic, environmental and social benefits, and fully met the acceptance standards.

The project focuses on the high-value utilization of industrial solid wastes such as mineral powder and fly ash, which are common by-products in industrial production and have long been faced with problems such as large storage capacity, high disposal costs and potential environmental pollution. Aiming at the technical bottlenecks of low activity, poor stability and difficult large-scale application of industrial solid wastes in cementitious materials, the R&D team carried out in-depth research and innovative exploration, and finally developed a series of total solid waste cementitious material products with independent intellectual property rights.

Specifically, the project has successfully developed 32.5-grade, 42.5-grade and 52.5-grade total solid waste cementitious materials, covering different application scenarios of construction projects, and constructed a complete technical system covering material design, performance evaluation and construction technology. This system not only ensures the stability and reliability of product performance, but also provides scientific guidance for the popularization and application of the products. During the implementation of the project, the team has made rich achievements: 1 new product was successfully developed, 9 high-quality academic papers were published in core journals, 15 national patents were applied for (including 7 authorized patents), and 5 engineering demonstration projects were completed, providing practical experience for large-scale application.

To promote the industrialization of technical achievements, the project has built a 500,000-ton total solid waste cementitious material production line, which has been put into formal operation and applied on a large scale in many highway projects in Ningxia and surrounding areas. The application practice shows that the total solid waste cementitious materials can not only replace traditional cement clinker in a certain proportion, reduce the consumption of non-renewable resources, but also significantly improve the resource utilization rate of industrial solid wastes, reduce environmental pollution caused by solid waste stacking, and effectively reduce the production cost of construction materials.

The successful acceptance and industrial application of this project not only promotes the technological progress of the solid waste cementitious material industry, but also provides a new path for the green and low-carbon transformation of the road engineering material field. It is of great significance for promoting the circular economy development, practicing the "dual-carbon" goal and promoting the high-quality development of the construction materials industry. In the future, with the continuous advancement of technology, the application scope of total solid waste cementitious materials will be further expanded, bringing more positive impacts to the green transformation of the entire construction industry.