Investigation of the Use of Micronized Dunite Additive for Fine-Grained Concrete

Abstract:

Securing dense concrete structure and the intensification of cement hydration processes plays an important role in ensuring high concrete strength. The results of the applicability of dunite magnesian rocks of Central Aldan (Yakutia) for concrete production are presented. Petrographic and thermographic studies are conducted for the preliminary preparation of the charge. Pre-firing, fine intergrinding, and additional mechanical activation of the charge were applied. It is found that finely ground and pre-fired magnesium silicates act as both a micro-filler contributing to increased stone density and an active agent in forming robust crystallization structure. It is established that the use of pre-fired dunite powder with specific surface area of 8000 ± 200 cm²/kg in combination with the SP-1 superplasticizer allows obtaining autoclaved reactive powder concrete with a strength grade of up to B45.

• Periodical: Materials Science Forum (Volume 1081)
• Pages: 183-190
• DOI: https://doi.org/10.4028/p-g5m0g4
• Online since: March 2023
• Authors: S.G. Moskvitin*, L.V. Moskvitina, A.A. Vasilyeva, Galina D. Fedorova
• Keywords: Autoclaving, Cement, Dunite, Fine-Grained Concrete, Mineral Additive, Reactivity, Strength, Superplasticizer

References

[1] V.I. Kalashnikov, What is new generation powder-activated concrete, Construction Materials. 10 (2012) 44-47.

[2] V.I. Kalashnikov et al Highly efficient powder-activated concretes for various functional purposes using superplasticizers, Construction Materials. 11 (2011) 62–67.

[3] V.I. Kalashnikov, O.V. Tarakanov, About the use of complex additives in concretes of a new generation, Construction Materials. 1–2 (2017) 62–67.

[4] P. Richard, M. Cheybezy, Composition of reactive Powder Concretes, Scientific Division Bougues, Cement and Concrete Research. Vol. 25, 7 (1995) 1501-1511.

DOI: 10.1016/0008-8846(95)00144-2

[5] G.I. Berdov et al., About the use of complex additives in concretes of a new generation, Construction Materials. 7 (2008) 76–81.

[6] V.N. Zyryanova et.al., About the influence of the structure of magnesium silicates on their physical and chemical properties, Soviet Mining Science. 6 (1992) 97-109.

[7] L.I. Khudyakova, K.K. Konstantinova, B.L. Narimanova, Dunite-based binders, Construction materials. 8 (2000) 33-34.

[8] G.E. Okolnikova, G.E. Grishin, A.K. Kurbanmagomedov, N.I. Shcherdrin, Experimental study of the physical and mechanical properties of high-strengh fine-grained mofilied «powdery» concrete. System technologies. 31 (2019) 44-47.

[9] A.A. Vasilyeva et al., Influence of dunite mineral additive on strength of cement. IOP Conf. Ser.: Mater. Sci. Eng. 286 (2017) 012020.

DOI: 10.1088/1757-899x/286/1/012020

[10] G.E. Okolnikova, G.E. Grishin, A.K. Kurbanmagomedov, N.I. Shcherdrin, Experimental study of the physical and mechanical properties of high-strengh fine-grained mofilied «powdery» concrete. System technologies. 31 (2019) 44-47.

[11] D.V.Q. Nguyen, Y. Bazhenov, O.V. Aleksandrova, Effect of quartz powder and mineral admixtures on the properties of high-performance concrete. Bull. MGSU 11(1) (2019) 102–117.

DOI: 10.22227/1997-0935.2019.1.102-117

[12] Ch. Du, G. Yang, T. Zhang, Q. Yang, Miltiscale study of the influence of promoters on low-plasticity clay stabilized with cement-based composites, Construction and Building Materials. 213 (2019) 537 –548.

DOI: 10.1016/j.conbuildmat.2019.04.094

[13] Ch. Du, G. Yang, T. Zhang, Q. Yang, Miltiscale study of the influence of promoters on low-plasticity clay stabilized with cement-based composites, Construction and Building Materials. 213 (2019) 537 –548.

DOI: 10.1016/j.conbuildmat.2019.04.094

[14] O. Bazhenova, Effect of Additives on the Properties of Fine-Grained Concrete Trans Siberia 2019: VIII International Scientific Siberian Transport Forum, pp.526-535.

DOI: 10.1007/978-3-030-37919-3_52

[15] L.V. Moskvitina, S.G. Moskvitin, Autoclave Synthesis of Composite Cements on Magnesium Silicates, IOP Conference Series: Materials Science and Engineering. Vol. 753, Chapter 4, 753 052006.

DOI: 10.1088/1757-899x/753/5/052006