Study on Influence Factors of Cement-Free Binding Material Based on Fly Ash and Slag


Article Preview

The cement-free binding material, namely geopolymer, is a novel binding material made from solid waste such as fly ash and slag activated by the alkali. In this research, orthogonal tests were carried out on 20 x 20 x 20mm cube paste specimens cured at room temperature to explore the rules of influence factors according to the compressive strength for 3d, 7d and 28d. The results revealed that the ratio of fly ash/slag is the most significant factor, the ratio of water/ (fly ash+ slag), the modulus of alkali activator and the dosage of desulfurized gypsum also play great role in strength development of the binder. The compressive strength of the specimens can be obtained to 65.0 MPa and 51.21MPa at maximum for 28d when the ratios of fly ash/slag are 30/70 and 40/60 respectively.



Edited by:

Z.S. Liu, L.P. Xu, X.D. Liang, Z.H. Wang and H.M. Zhang




J. Q. Liu et al., "Study on Influence Factors of Cement-Free Binding Material Based on Fly Ash and Slag", Advanced Materials Research, Vol. 1015, pp. 56-59, 2014

Online since:

August 2014




* - Corresponding Author

[1] Krivenko P V. Alkaline cements: terminology classification, aspects of durability [C]/ Proceedings of the 10th International Congress on the Chemistry of Cement, Gothenburg, Sweden, Amarkai and Congrex Goteborg Gothenburg, Sweden, (1997).

[2] Xufang Zhang, Wen Ni, Wei Wang, Junyu Wu. Preparation of Cementitious Material with Slag and Fly ash[J].Materials Review, 23(2009), p.93. In Chinese.

[3] Jianli Shang, Lin Liu. Study on Preparation and Mechanical Properties of Slag and Fly Ash Based Geopolymeric[J].Bulletin of the Chinese ceramic society, 30(2011), p.741.

[4] Maochieh Chia, Ran Huang. Binding mechanism and properties of alkali-activated fly ash/slag mortars[J]. Construction and Building Materials, 40(2013), p.291.

[5] Djwantoro Hardjito, Chua Chung Cheak & Carrie Ho Lee Ing. Strength and Setting Times of Low Calcium Fly Ash-based Geopolymer Mortar. Modern Applied Science, 2(2008), p.3.