The Blast furnace slag properties at different grinding times and its effect on foam concrete properties


  • Dien Vu Kim constructional and industrial college
  • Sofya Ildarovna Bazhenova
  • Trong Chuc Nguyen
  • Van Lam Tang
  • Minh Chien Do
  • Van Loi Le
  • Van Duong Nguyen
  • Cong Ly Nguyen
  • Minh Thuan Hoang



Blast furnace slag, Mechanical properties, Mixtures, Concrete, Mechanical grinding


The paper presents the blast furnace slag properties at different grinding times by the dry grinding method. The process of fine grinding blast furnace slag is prepared at different times (10 minutes, 20 minutes, 30 minutes, 40 minutes). The results indicated that the main component in BFS is the amorphous structure defined in about 25÷35 degrees (with the appearance of Akermanite at 31.1, Calcite at 29.2 and Aragonite at 26.4). The results also showed that the compressive strength and activity index of blast furnace slag increased significantly after extending the grinding time from 0-40 minutes (corresponding to compressive strength from 51.2 ÷ 7 2.1 MPa at 28 days of age and activity index of blast furnace slag from 91.92% -129.44%). The fine grinding process shows that the particle size of blast furnace slag is significantly reduced.

In addition, the paper also presents the effect of finely ground blast furnace slag in 40 minutes on foam concrete properties. Research results show that the use of finely crushed blast furnace slag by the mechanical grinding method to replace sand in foam concrete not only improves the mechanical properties such as compressive strength, flexural strength, the elastic modulus of foam concrete but also protect the environment, reduce product costs.


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How to Cite

Vu Kim, D., Ildarovna Bazhenova, S., Nguyen, T. C., Tang, V. L. ., Do, M. C. ., Le, V. L. ., Nguyen, V. D. ., Nguyen, C. L. ., & Hoang, M. T. (2022). The Blast furnace slag properties at different grinding times and its effect on foam concrete properties. Stavební Obzor - Civil Engineering Journal, 31(1), 32–44.