Investigation of Composite Deflocculant Influence on the Properties of the Refractory Castable with Chamotte Aggregate

Abstract:

The influence of different types of deflocculants, PCE and sodium tripolyphosphate, on the rheological properties of the cement matrix was studied. It was established that composite deflocculant consisting of sodium tripolyphosphate and PCE Castament FS 20 provides the best rheological properties of the cement matrix and affects the composition of the hydration products. During the drying process of matrix with composite deflocculants mineral stratlingite additionally formed, which contributes to increment of strength properties. Comparative studies of refractory castable strength properties with chamotte aggregate showed that the compressive strength of concrete samples with composite deflocculants after hardening and after drying and burning is almost two times higher than the strength of samples with separate deflocculants.

• Periodical: Applied Mechanics and Materials (Volume 682)
• Pages: 256-260
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.682.256
• Online since: October 2014
• Authors: Ina Pundienė, Irina Demidova-Buiziniene, A. Volochko
• Keywords: Deflocculant, Hydratation, Refractory Castables, Strength, Viscosity

References

[1] H. Hommer, K. Wutz, Recent development in deflocculants for castables. 9th Biennial Worldwide Congress on Refractories, (2006).

[2] J. von Seyerl, Dispersant and fine аluminas: a new way to tailor flow, setting time and strength development in castable mix designs. Inteceram, Refractories manual. 2005. pp.46-47.

[3] H. Hommer, The effect of polycarboxylate ethers as deflocculants in microsilica containing castables. Proceedings of the 10th Biennial Worldwide Congress on Refractories, UNITECR´07, Dresden, Germany, September 18-21, 2007, pp.401-404.

[4] J. Seyerl, Use of Polycarboxylate Ethers to Improve Workability of Castables. BASF Construction Polymers GmbH http: /www. dispersions-pigments. basf. com/portal/ streamer?fid= 348631.

[5] V. Antonovich, S. Goberis, I. Pundienė, R. Stonys, A New Generation of Deflocculants and Microsilica Used to Modify the Properties of a Conventional Refactory Based on a Chamotte Filler / / Refractories and Industrial Ceramics. - 2006. - Vol. 47, №. 3. pp.178-182.

DOI: 10.1007/s11148-006-0083-0

[6] S. Otroj, M. Bahrevar, F. Mostarzadeh, M. Nilforoshan, The effect of deflocculants on the self-flow characteristics of ultralow-cement castables in Al2O3- SiC-C system, Ceramics International. 2005. Vol. 31, № 5. pp.647-653.

DOI: 10.1016/j.ceramint.2004.06.023

[7] H. Hommer, J. Von Seyerl, The effect of polycarboxylate ethers as deflocculants in microsilica containing castables. Published in: Proceedings of the 10th Biennial Wordwide Congress on Refractories, UNITECR 07, Dresden, Germany, September 18-21, 2007, pp.401-404.

[8] G. Routschaka, D.M. Daichennolt, K. Wutz, New plasticizer for ultralow cement (ULCC) andalusite and bauxite castables. Interceram, Vol 49, Nr. 5, 2000, pp.356-359.