Influence of Alkaline Activator on the Strength of Fly Ash-Cement Gel Sand Material

Abstract:

Influence of different kinds and mixing amount of the alkaline activators on the strength of fly ash-cement gel sand materials is discussed through experiment wit 29 group test specimen. The rupture strength and the compressive strength with the age of 3 and 28 days of test blocks mixed with NaOH or CaO are compared each other. The early activity of fly ash can be activated by mixing the alkaline activator. The early activity of fly ash can be activated by mixing with the alkaline activators. The setting time of fly ash-cement binders becomes better. And the early strength can be improved. The activated effect of fly ash-cement binders by different type of the alkaline activators is affected by the age of test blocks. The activated effect mixed with CaO is better than the effect mixed with NaOH.

• Periodical: Advanced Materials Research (Volume 937)
• Pages: 472-475
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.937.472
• Online since: May 2014
• Authors: Hai Yan Huang*, Ai Min Gong, Kun Yuan
• Keywords: Alkaline Activator, Cement Gel Sand, Fly Ash (FA), Strength

References

[1] Juan-rong Zheng, Li-na Liu, Ling-xia Xie. Properties of the mortar and concrete of alkali- activated fly- ash cementing materials [J]. Concrete, 2009, (5): 71-79.

[2] Fernandez-dimenez, et al. Microstructure development of alkali activated fly ash cement: a descriptive model [J]. Cement and Concrete Research, 2005(35): 1204-1209.

DOI: 10.1016/j.cemconres.2004.08.021

[3] Jing fu Kang, Xiufen Wang. Effects of GH admixture on the early strength of fly ash concrete and mortar [J]. Journal of Wuhan University of Technology-Mater. Sci. Ed, 2008 (5): 755-760.

DOI: 10.1007/s11595-007-5755-1

[4] Xiao-feng Luan, Zhi-hua Pan, Dong-dong Wang. Study on the Chemical Activation of Fly Ash in Fly Ash Blended Portland Cement System [J]. Bulletin of the Chinese Ceramic Society, 2010, 29(4): 757-761.

[5] Kuhnke M, Fretwurst E, Lindstroem G. Defect generation in crystalline silicon irradiation with high-energy particles[J]. Nuclear Instruments and Methods in Physics Research B, 2002, 186: 144-150.

DOI: 10.1016/s0168-583x(01)00886-2

[6] Poirier R, Avalos V, Dannefaer S, et al. Annealing mechanisms of divacancies in silicon [J]. Physica B, 2003, 340-342: 609-621.

DOI: 10.1016/j.physb.2003.09.240

[7] Ting-shu He, Guo-qiang Wei. Effect of activators excitated cement specimen with different amount of fly ash on strength [J]. Concrete, 2009, (5): 62-64.

[8] Shujin Li, Jianfen Li. Experimental Study of Alkali Activated Large-Volume Fly Ash Cementitious Materials [J]. Coal Ash China, 2010, (46): 10-12.