Effects of clay on properties of polycarboxylate superplasticizer and solutions

Abstract

The influence law of clay on mortar fluidity mixed with polycarboxylate superplasticizer was studied. Several methods of inhibiting clay adsorption of polycarboxylate superplasticizer were discussed. The experimental results show that clay has significant effect on the dispersion of polycarboxylate superplasticizer and montmorillonite clay has more significant impact on mortar fluidity than other clays. The pH value and the salts of the solution can affect the adsorption of clay to polycarboxylate superplasticizer. The incorporation of a small amount of sodium hydroxide solution, sodium silicate or cationic surfactants can improve the effect of the clay on the dispersion of polycarboxylate superplasticizer.

Keywords

clay / polycarboxylate superplasticizer / fluidity / adsorb

References

[1] Wang ZM, Chen X, Li MD. Effects of Different Clay on the Application Performance of Polycarboxylate Superplasticizer[J]. Commercial Concrete, 2010, 3: 24-26.

[2] Ma BG, Yan M, Tan HB. Effects of Clay Content on the Performance of Water Reducer [J]. Journal of University of Jinan, 2012, 26(4): 331-336.

[3] Ng S, Plank J. Interaction Mechanisms Between Na Montmorillonite and MPEG-based Polycarboxylate Superplasticizers[J]. Cement and Concrete Research, 2012, 42(6): 847-854.

[4] Li L, Plank J. Synthesis, Working Mechanism and Effectiveness of a Novel Cycloaliphatic Superplasticizer for Concrete[J]. Cement and Concrete Research, 2012, 42(1): 118-123.

[5] Yang CZ. Loss Mechanism of Surface Active Agent in the Chemical Flooding Process and Inhibition Method-Loss Mechnism[J]. Oil Field Chemistry, 1985, 2(1): 9-20.

[6] Yang CZ. Loss Mechanism of Surface Active Agent in the Chemical Flooding Process and Inhibition Method-Inhibition Method [J]. Oil Field Chemistry, 2010, 50(9): 1321-1324.

[7] Li L, Plank J. A Concept for a Polycarboxylate Superplasticizer Possessing Enhanced Clay Tolerance[J]. Cement and Concrete Research, 2012, 42: 1299-1306.

[8] Ng S, Plank J. Interaction Mechanisms Between Na Montmorillonite Clay and MPEG-based Polycarboxylate Superplasticizers[J]. Cement and Concrete Research, 2012, 42: 847-854.

[9] Blockhaus F, Sequaris J, Narres HD, et al. Adsorption-Desorption Behavior of Acrylic-Maleic Acid Copolymer at Clay Minerals[J]. Journal of Colloid and Interface Science, 1997, 186: 234-247.

[10] Lee LT, Rahbari R, Lecourtier J, Chauvetay G. Adsorption of Polyacrylamicdes on the Different Faces of Kaolinites[J]. Journal of Colloid and Interface Science, 1991, 47(2): 351-357.