Organization Name:Nanjing University of Science and Technology

Project introduction:

Nanjing University of Science and Technology have carried out comprehensive cooperation in production, learning, research and application with Zhejiang Zhongjin Environmental Protection Technology Co., Ltd. based on the scientific and technological achievements of the National 863 Plan "clean chemical production technology - development and utilization of chemical white mud tailings resources2003AA322010 ". It has developed the "artificial new functional silicate ceramsite preparation technology" and formed a production line with an annual output of 100000 tons, with independent intellectual property rights. At present, the artificial new functional silicate ceramsite has been applied in the fields of green buildings and artificial wetlands. The project adopts hydrothermal synthesis process, which is different from sintered ceramsite and cold-bonding ceramsite. It is an important technology that changes the utilization of solid wastes and innovates the concrete technology system. Functional silicate ceramsite has excellent mechanical properties and weather resistance, and its technical indicators are better than T/CECS10113-2020 and GB/T17431.1 -2010. The volume replacement method is adopted to replace the stone and sand, and the lightweight aggregate concrete with density of 1600~2100Kg/m3 and strength grade of LC30~LC80 series can be configured. Ceramsite can significantly improve the comprehensive performance of concrete and will become an important seventh component of concrete in the future. It has broad application prospects in high-strength concrete, ultra-high pumping concrete, self-compacting concrete, self-curing concrete, self -waterproof concrete, high crack resistance concrete, steel tube concrete and other aspects. The project accepted 19 national invention patents, authorized 6, and published 9 SCI/EI/ Peking University Chinese core papers.

This achievement has two engineering demonstration bases in Ningbo, Zhejiang and Fuding, Fujian, with an annual consumption of 80000 tons of slag and 260000 tons of basalt grinding mud. The annual output value is 70 million yuan, and the profit and tax are 10 million yuan, which has obvious social and economic benefits. The industrialization results were reported by CCTV-2.This industrialization technology has important promotion value for the resource utilization of mine tailings in BRICs countries.