Fired perforated brick is a common material in modern construction industry. This paper introduced the production technology and equipment of fired perforated brick. Based on the research status of domestic and foreign scholars, technical difficulties and corresponding solutions of production process were analyzed and summarized. And the future of fired perforated bricks production equipment was discussed.

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The development of recycling waste concrete in China and abroad is reviewed in detail together with a brief review of the recycling technology of waste concrete. Advantages, disadvantages and properties of recycled coarse aggregate, fine aggregate and fine powder are discussed through extensive analysis of the literature, and new trends in recycled material development are also presented.

The text describes the current research status of activation technology of recycled fine powder. The influences of all excitation methods on recycled fine powder are introduced, Based on the analysis of the advantages and disadvantages of the existing excitation methods, the paper puts forward suggestions for energy-saving improvement of mechanical grinding, searching for new chemical activators, controlling temperature and humidity and so on, so as to further promote the recycling of recycled fine powder in China.