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Tolerance of Clay Minerals by Cement: Effect of Side-Chain Density in Polyethylene Oxide (PEO) Superplasticizer Additives

Published online by Cambridge University Press:  01 January 2024

Hongbo Tan ,
Xin Li ,
Min Liu ,
Baoguo Ma ,
Benqing Gu  and
Xiangguo Li
Hongbo Tan
Affiliation:
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, P.R. China
Xin Li
Affiliation:
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, P.R. China
Min Liu*
Affiliation:
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, P.R. China
Baoguo Ma
Affiliation:
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, P.R. China
Benqing Gu
Affiliation:
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, P.R. China
Xiangguo Li
Affiliation:
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, P.R. China
*
*E-mail address of corresponding author: min.liu.13@ucl.ac.uk
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Abstract

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Polycarboxylate superplasticizer (PCE) is a widely used water-reducing agent that can reduce significantly the water demand of concrete, which reduces the porosity and enhances the strength and durability of the concrete. (The PCE consists of a single backbone with many long PEO side chains.) Generally, aggregate occupies >70 wt.% of concrete; clay minerals are ubiquitous in nature and are difficult to avoid in mined aggregates. Clay minerals in aggregate often render the PCE ineffective and give rise to rapid loss of the fluidity of the concrete; this phenomenon is referred to as ‘poor clay tolerance of PCE.’ Though the poor clay tolerance of PCE is known widely, the relationship between the clay tolerance and the molecular structure of the PCE, in particular the effect of the side-chain structures, on clay tolerance is not understood completely. The objective of the present study was to determine the effect of different grafting densities of polyethylene oxide (PEO) side chains on the clay tolerance of PCE. The raw materials included mainly PCE, which was synthesized using acrylic acid and isopentenol polyoxyethylene ether, and a natural montmorillonite (Mnt), one of the most common clay minerals. The loss of fluidity of the cement paste was tested to assess the clay tolerance; total organic carbon was used to measure the amount of PCE adsorbed; X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy, and thermogravimetric analysis were used to investigate the microstructure of the intercalated Mnt. The results showed that preventing the superficially adsorbed PCE from being intercalated into Mnt was of great importance in terms of the improvement in clay tolerance of PCE, which increased with greater grafting density of PEO in the side chain of the PCE. The results also suggested the possibility that polymers which intercalate preferentially into the Mnt could improve significantly the clay tolerance of the PCE system.

Keywords

IntercalationInterlayer AdsorptionInterlayer SpacingMontmorilloniteSuperficial Adsorption
Type
Article
Information
Clays and Clay Minerals , Volume 64 , Issue 6 , December 2016 , pp. 732 - 742
Copyright
Copyright © Clay Minerals Society 2016

References

Ait-Akbour, R. Boustingorry, P. and Leroux, F., 2015 Adsorption of PolyCarboxylate Poly(ethylene glycol) (PCP) esters on Montmorillonite (Mmt): Effect of exchangeable cations (Na+, Mg2+ and Ca2+) and PCP molecular structure Journal of Colloid and Interface Science 437 227–234.CrossRefGoogle Scholar
Bey, H.B. Hot, J. and Baumann, R., 2014 Consequences of competitive adsorption between polymers on the rheological behaviour of cement pastes Cement & Concrete Composites 54 17–20.CrossRefGoogle Scholar
China Building Materials Academy, 2007 GB175-2007 Common Portland Cement .Google Scholar
Fan, W. Stoffelbach, F. and Rieger, J., 2012 A new class of organosilane-modified polycarboxylate superplasticizers with low sulfate sensitivity Cement and Concrete Research 42 166–172.CrossRefGoogle Scholar
Fernandes, V.A. Purnell, P. and Still, G.T., 2007 The effect of clay content in sands used for cementitious materials in developing countries Cement and Concrete Research 37 751–758.CrossRefGoogle Scholar
Houst, Y.F. Bowen, P. and Perche, F., 2008 Design and function of novel superplasticizers for more durable high performance concrete (superplast project) Cement and Concrete Research 38 1197–1209.CrossRefGoogle Scholar
Jun, Y. Jeong, Y. and Oh, J.E., 2015 Influence of the structural modification of polycarboxylate copolymer with a low dispersing ability on the set-retarding of Portland cement KSCE Journal of Civil Engineering 19 1787–1794.CrossRefGoogle Scholar
Konan, K.L. Peyratout, C. and Cerbelaud, M., 2008 Influence of two dispersants on the rheological behavior of kaolin and illite in concentrated calcium hydroxide dispersions Applied Clay Science 42 252–257.CrossRefGoogle Scholar
Lei, L. and Plank, J., 2012 A concept for a polycarboxylate superplasticizer possessing enhanced clay tolerance Cement and Concrete Research 42 1299–1306.CrossRefGoogle Scholar
Lei, L. and Plank, J., 2014 A study on the impact of different clay minerals on the dispersing force of conventional and modified vinyl ether based polycarboxylate superplasticizers Cement and Concrete Research 60 1–10.CrossRefGoogle Scholar
Lei, L. and Plank, J., 2014 Synthesis and properties of a vinyl ether-based polycarboxylate superplasticizer for concrete possessing clay tolerance Industrial & Engineering Chemistry Research 53 1048–1055.CrossRefGoogle Scholar
Li, G. He, T. and Hu, D., 2012 Effects of two retarders on the fluidity of pastes plasticized with aminosulfonic acidbased superplasticizers Construction and Building Materials 26 72–78.CrossRefGoogle Scholar
Li, L.G. and Kwan, A.K.H., 2015 Effects of superplasticizer type on packing density, water film thickness and flowability of cementitious paste Construction and Building Materials 86 113–119.CrossRefGoogle Scholar
Liu, J. Ran, Q. and Miao, C., 2011 Synthesis and characterization of comb-like copolymer dispersant with methoxy poly (ethylene oxide) side chains Polymer-Plastics Technology and Engineering 50 59–66.CrossRefGoogle Scholar
Liu, J. Ran, Q. and Miao, C., 2012 Effects of grafting densities of comb-like copolymer on the dispersion properties of concentrated cement suspensions Materials Transactions 53 553–558.CrossRefGoogle Scholar
National Building Materials Industry Bureau of Suzhou Concrete Cement Products Academy, 2007 GB/T 8077-2000. Methods for testing uniformity of concrete admixture Nanjing, China National Building Materials Industry Bureau of Suzhou Concrete Cement Products Academy.Google Scholar
Nehdi, M.L., 2014 Clay in cement-based materials: Critical overview of state-of-the-art Construction and Building Materials 51 372–382.CrossRefGoogle Scholar
Ng, S. and Plank, J., 2012 Interaction mechanisms between Na montmorillonite clay and MPEG-based polycarboxylate superplasticizers Cement and Concrete Research 42 847–854.CrossRefGoogle Scholar
Plank, J. Sakai, E. and Miao, C.W., 2015 Chemical admixtures — chemistry, applications and their impact on concrete microstructure and durability Cement and Concrete Research 78 81–99.CrossRefGoogle Scholar
Ran, Q.P. Somasundaran, P. and Miao, C.W., 2009 Effect of the length of the side chains of comb-like copolymer dispersants on dispersion and rheological properties of concentrated cement suspensions Journal of Colloid and Interface Science 336 624–633.CrossRefGoogle ScholarPubMed
Ran, Q.P. Somasundaran, P. and Miao, C.W., 2010 Adsorption mechanism of comb polymer dispersants at the cement/water interface Journal of Dispersion Science and Technology 31 790–798.CrossRefGoogle Scholar
Sakai, E. Atarashi, D. and Daimon, M., 2006 Interaction between superplasticizers and clay minerals Proceedings of the 6th International Symposium on Cement & Concrete and CANMET/ACI International Symposium on Concrete Technology for Sustainable Development, Vols 1 and 2 1560–1566.Google Scholar
Standardization Administration of China, 2008 GB/T 8076-2008 — concretead mixtures Beijing Standardization Administration of China.Google Scholar
Tan, H. Gu, B. and Ma, B., 2016 Mechanism of intercalation of polycarboxylate superplasticizer into montmorillonite Applied Clay Science 129 40–46.CrossRefGoogle Scholar
Tan, H.B. Li, X. and Huang, J., 2015 Effect of competitive adsorption between polycarboxylate superplasticiser and sodium tripolyphosphate on cement paste fluidity Advances in Cement Research 27 593–600.CrossRefGoogle Scholar
Tan, H.B. Lin, C.L. and Yang, H., 2015 Effect of clay minerals on the properties of cement paste with the addition of sodium naphthalene sulphonate superplasticizer Cement Wapno Beton 20 193–200.Google Scholar
Tregger, N.A. Pakula, M.E. and Shah, S.P., 2010 Influence of clays on the rheology of cement pastes Cement and Concrete Research 40 384–391.CrossRefGoogle Scholar
Wang, W.S. Zheng, B.C. and Feng, Z.J., 2012 Adsorption of polycarboxylate-based superplasticizer onto natural bentonite Journal of Advanced Concrete Technology 10 323–331.CrossRefGoogle Scholar
Winnefeld, F. Becker, S. and Pakusch, J., 2007 Effects of the molecular architecture of comb-shaped superplasticizers on their performance in cementitious systems Cement & Concrete Composites 29 251–262.CrossRefGoogle Scholar
Xu, H.J. Sun, S.M. and Wei, J.X., 2015 Beta-cyclodextrin as pendant groups of a polycarboxylate superplasticizer for enhancing clay tolerance Industrial & Engineering Chemistry Research 54 9081–9088.CrossRefGoogle Scholar
Yamada, K. Ogawa, S. and Hanehara, S., 2001 Controlling of the adsorption and dispersing force of polycarboxylatetype superplasticizer by sulfate ion concentration in aqueous phase Cement and Concrete Research 31 375–383.CrossRefGoogle Scholar
Yun, K.K. Choi, S.Y. and Yeon, J.H., 2015 Effects of admixtures on the rheological properties of high-performance wet-mix shotcrete mixtures Construction and Building Materials 78 194–202.CrossRefGoogle Scholar
Zhang, Y. and Kong, X., 2015 Correlations of the dispersing capability of NSF and PCE types of superplasticizer and their impacts on cement hydration with the adsorption in fresh cement pastes Cement and Concrete Research 69 1–9.CrossRefGoogle Scholar
Zhang, Y.R. Kong, X.M. and Lu, Z.B., 2015 Effects of the charge characteristics of polycarboxylate superplasticizers on the adsorption and the retardation in cement pastes Cement and Concrete Research 67 184–196.CrossRefGoogle Scholar
Zhang, Y. Kong, X. and Gao, L., 2016 In-situ measurement of viscoelastic properties of fresh cement paste by a microrheology analyzer Cement and Concrete Research 79 291–300.CrossRefGoogle Scholar