Concretes with Organic Admixtures

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Abstract

The current work is intended to explain the role of some organic admixtures on the hardened structure of refractory concretes with aluminous cement. The influences on the mechanical-structural properties in the normal hardening but in the heating conditions at different temperatures are emphasized, also. These are due to the influence on the hydration process (i.e. the kind of the neoformations and degree of hydration) and implicitly on the size and distribution of structural pores.

[1] N. Angelescu – Betoane cu dozaj redus de ciment. Doctorate thesis, Politehnica University, Bucharest, 1983.

[2] B. K. Carr – Refractories Journal (1975), 12, 5-6.

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[4] I. Teoreanu, N. Angelescu – Mat. Constr. 8 (1978), 3, 127.

[5] I. Teoreanu, N. Angelescu – Mat. Constr. 10 (1980), 1, 31.

[6] N. Angelescu – Cement and Concrete World, vol. 8, no. 44, pp. 52-59, 2003, ISSN 1301-0859.

[7] N. Angelescu – Lignosulfonatul de calciu – adaos pentru imbunatatire lucrabilitatii refractarelor monolitice speciale/Calcium Lignosulphonate Addition for Improving Special Monolithic Refractories Workability. Cercetari Metalurgice şi de Noi Materiale – Metallurgy and New Materials Researches (ROMANIA), ISSN 1221-5503, Vol X, nr. 4, pp. 15-25, 2002.

[8] I. Teoreanu, N. Angelescu - The Influence of Some Organic Additives on Refractory Aluminous Cement Hydration. Il Cemento (Italia), vol. 83, pp. 191-198, 1986.

[9] D. Stanciu, I. Ion, J. A. Barosso, N. Angelescu - Self– Compacting Concrete. A Comparison between the Workability Properties, Density, Porosity and Mechanical Properties. Metalurgia International, Vol. XVIII(3), p. 138-141, 2013.

[10] I. Ion, J. A. Barosso, N. Angelescu D. Stanciu - Properties of polymer modified concrete in fresh and hardened state. Advanced Materials Research, Trans. Tech. Publications, Switzerland, Vols. 687, pp 204-212, 2013. Lucrare prezentata la 14th ICPIC International Congresses on Polymers in Concrete, Shanghai (China), 2013.

[11] Angelescu, N., Ionita, C., Bratu, V. - Structural and mechanical characterization of high alumina additivated cement based on high refractory mineralogical compounds. Construction Materials and Structures. Pages 113 – 120. Edited by Ekolu, S,O., Dundu, M., Gao, X., IOS Press, 2014, doi: 10.3233/978-1-61499-466-4-113. Conference: 1st International Conference on Construction Materials and Structures, Johannesburg, South Africa, November 24 – 26, 2014.

[12] Angelescu, N., Ion, I., Stanciu, D., Barosso, J. A., Abdelgader, H. S., Bratu, V. - Role of superplasticizer additives upon hydration process of cement pastes. The Scientific Bulletin of VALAHIA University – MATERIALS and MECHANICS, nr. 11(14), pp. 23-26, 2016.

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