Grinding aids to increase grinding efficiency in cement production are materials that can produce large amounts of high-quality cement in a short time by reducing surface energy by preventing particle agglomeration and improving fluidity. In the paper, a grinding aid using glycerol-waste antifreeze (GAP) was prepared and its effect on the grinding properties of clinker was investigated in contrast to that without the grinding aid. The results are as follows: The angle of repose of the cement powder added with GAP decreased as the grinding time increased (decreases by 3.8 when the grinding time was 60 minutes), indicating that it increased the flowability of the powder. On the contrary, when GAP was added, the residual amount of 45 mum sieve was also significantly reduced (4.6 % decrease) and the specific surface area increased (30.5 m{2}/kg), which resulted in an increase in the grinding efficiency. The zeta potential of the cement powder is greatly reduced, which lowers the surface tension of the cement particles. In the size range of 3 to 32 mum, it increases the particle content, makes the particle size distribution uniform, the 7d and 28d activity index of the powder is improved by 5 % and 6 %, respectively, and increases the compressive strength of the cement. In addition, it was confirmed that the performance of the TEA grinding aid and the grinding aid were similar, and were very effective in terms of economy.

• Cement grinding aid based on glycerol-waste antifreeze
  • 1. Introduction
  • 2. Materials and Methods
    • 2.1. Materials
    • 2.2. Experiment Method
  • 3. Results and Discussion
    • 3.1. Effect of Grinding Aids on the Fluidity of Cement Powder
    • 3.2. Effect of Grinding Aids on the Fineness of Cement
    • 3.3. Effect of grinding aid on the particle size distribution of cement powder
    • 3.4. Effect of grinding aid on the activity index of cement powder
    • 3.5. Analysis of zeta potential of cement
    • 3.6. Effect of grinding aid on the compressive strength of cement
    • 3.7. Performance comparison of GAP and TEA
  • 4. Conclusions

Magazine of Civil Engineering / Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург: СПбПУ, 2020-. — Периодичность: 8 раз в год. — Выходит с 2020 г. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Электрон. журнал. — Текст: электронный

Magazine of Civil Engineering / Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург: СПбПУ, 2020-. № 4 (112), 2022. — 1 файл (14,5 Мб). — Свободный доступ из сети Интернет (чтение, печать, копирование). — Электрон. журнал. — <URL:http://elib.spbstu.ru/dl/2/j23-195.pdf>.