The scientific research project "key technology of Ecological Application of machine-made sand high performance concrete" led by Wuhan University of science and technology and jointly applied by Henan University and other units won the second prize of science and technology progress of Hubei Province in 2018.

Professor Cai Jiwei has participated in the research work of this project for many years, mainly in the influence of manufactured sand and stone powder on the performance of concrete, the characterization method of manufactured sand morphology and the test technology of concrete segregation and bleeding.

Combined with many construction units and construction units, the technology application has been extended from ordinary concrete to high strength and high performance concrete, with the highest strength grade of C120. In addition, the project has also made important achievements in the material design method of manufactured sand high performance concrete, the key technology of manufactured sand production and ecological application.

In recent years, the lack of river sand resources and environmental protection situation, machine-made sand has become the main resource of concrete sand. This achievement provides technical support for the conversion of engineering sand sources and the preparation of green building materials in China.