Polycarboxylate Ether Superplasticizer Synthesis, Interplay Between The Structure And Properties

Document Type : Original Article

Authors

1 M.Sc. Graduate, Department of Polymer Engineering, Faculty of Chemical Engineering, University of Tehran, Tehran, Iran

2 M.Sc. Graduate, Department of Maritime Engineering, Faculty of Civil Engineering

Abstract

Polycarboxylate superplasticizers based on acrylic acid (AA) and maleic anhydride (MAn) were synthesized via free‐radical copolymerization with an ethylene glycol monomer and characterized. The copolymerization temperature (ranging from 90 to 130 °C) appeared to be the key operating factor governing the chemical structure of the superplasticizers. The chemical structures of the products were analyzed by gel permeation chromatography, whereas an optimized sample was further analyzed by Fourier transform infrared spectroscopy and 1H‐NMR. Superplasticizers of the AA and MAn classes were then incorporated into concrete, and their performances were measured by slump and slump loss tests, where a large dependency of the microstructure on the synthesis temperature was recognized. The optimum temperatures were found to be 90 and 120 °C for the AA and MAn modifiers, respectively. At their own optimum temperatures, the AA and MAn superplasticizer revealed slump losses from 23 to 4 cm and 15 to 5 cm, respectively, after 45 min. The chemical structures of the plasticizers were patterned illustratively to speculate the performance of each superplasticizer according to changes that took place in the backbone length and side‐chain density.

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References

[1]  Memon, A. H., Radin, S. S., Zain, M. F. M., & Trottier, J. F. (2002). Effects of mineral and chemical admixtures on high-strength concrete in seawater. Cement and Concrete Research, 32(3), 373-377.
[2] Łaźniewska-Piekarczyk, B. (2013). The influence of chemical admixtures on cement hydration and mixture properties of very high performance self-compacting concrete. Construction and building materials, 49, 643-662.
[3]  Assaad, J, Kamal, H. (2004). Evaluation of static stability of self-consolidating concrete. ACI Materials Journal 101.3 .
[4]  Neville, A. M. (2006). Concrete: Neville's insights and issues. Thomas Telford.
[5]  Felekoğlu, B., Türkel, S., & Baradan, B. (2007). Effect of water/cement ratio on the fresh and hardened properties of self-compacting concrete. Building and Environment, 42(4), 1795-1802.
[6]  Mardani-Aghabaglou, A., Tuyan, M., Yılmaz, G., Arıöz, Ö., & Ramyar, K. (2013). Effect of different types of superplasticizer on fresh, rheological and strength properties of self-consolidating concrete. Construction and Building Materials, 47, 1020-1025.
[7]  Barbhuiya, S. (2011). Effects of fly ash and dolomite powder on the properties of self-compacting concrete. Construction and Building Materials, 25(8), 3301-3305.
[8]  Hwang, S. D., Khayat, K. H., & Bonneau, O. (2006). Performance-based specifications of self-consolidating concrete used in structural applications. ACI materials journal, 103(2), 121.
[9]  Paultre, P., Khayat, K. H., Cusson, D., & Tremblay, S. (2005). Structural performance of self-consolidating concrete used in confined concrete columns. ACI structural journal, 102(4), 560-568. [10]  Björnström, J., & Chandra, S. (2003). Effect of superplasticizers on the rheological properties of cements. Materials and Structures, 36(10), 685-692.
[11]  Boukendakdji, O., Kadri, E. H., & Kenai, S. (2012). Effects of granulated blast furnace slag and superplasticizer type on the fresh properties and compressive strength of self-compacting concrete. Cement and concrete composites, 34(4), 583-590.
[12]  Lei, L., & Plank, J. (2012). Synthesis, working mechanism and effectiveness of a novel cycloaliphatic superplasticizer for concrete. Cement and Concrete Research, 42(1), 118-123.
[13]  Guérandel, C., Vernex-Loset, L., Krier, G., De Lanève, M., Guillot, X., Pierre, C., & Muller, J. F. (2011). A new method to analyze copolymer based superplasticizer traces in cement leachates. Talanta, 84(1), 133-140.
 [14]  Houst, Y. F., Bowen, P., Perche, F., Kauppi, A., Borget, P., Galmiche, L., ... & Banfill, P. F. (2008). Design and function of novel superplasticizers for more durable high performance concrete (superplast project). Cement and Concrete Research, 38(10), 1197-1209.
[15]  Yamada, K., Takahashi, T., Hanehara, S., & Matsuhisa, M. (2000). Effects of the chemical structure on the properties of polycarboxylate-type superplasticizer. Cement and concrete research, 30(2), 197-207.
[16] Winnefeld, F., Becker, S., Pakusch, J., & Götz, T. (2007). Effects of the molecular architecture of comb-shaped superplasticizers on their performance in cementitious systems. Cement and Concrete Composites, 29(4), 251-262.
[17]  Felekoğlu, B., & Sarıkahya, H. (2008). Effect of chemical structure of polycarboxylate-based superplasticizers on workability retention of self-compacting concrete. Construction and Building Materials, 22(9), 1972-1980.
 [18]  Bian, R. B., & Shen, J. (2006). Review of polycarboxylate superplasticizer: synthetic methods and research. FINE CHEMICALS-DALIAN-, 23(2), 179.
[29]   Janowska-Renkas, E. (2013). The effect of superplasticizers’ chemical structure on their efficiency in cement pastes. Construction and Building Materials, 38, 1204-1210.

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History

  • Receive Date: 14 April 2020
  • Revise Date: 02 June 2020
  • Accept Date: 02 June 2020

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