Study on Influences of Slag Powder and Fly Ash on Concrete Penetration Performance

Abstract:

The resistance to chloride ion penetration of the concrete added with slag powder and fly ash is studied in this paper. The tests show that: adding slag powder and fly ash to concrete can improve the concrete’s resistance to chloride ion penetration; if only adding slag powder, the larger the adding content and the longer the test age, the better the concrete’s resistance to chloride ion penetration; if only adding fly ash, the longer the test age, the better the concrete’s resistance to chloride ion penetration; at the age of 28, 56 days, if the fly ash adding content is 30%, the concrete’s resistance to chloride ion penetration is optimal, while at the age of 84 days, if the fly ash adding content is 40%, the concrete’s resistance to chloride ion penetration is optimal; if adding both slag power and fly ash, the larger the adding content and the longer the test age, the better the concrete’s resistance to chloride ion penetration; if the test age and adding content remain constant, for the concrete’s resistance to chloride ion penetration, it is the best when adding both slag power and fly ash, it is good when adding only slag power, and it is poor when adding only fly ash; for the influences of the test age on the concrete’s resistance to chloride ion penetration, it is maximum when adding only fly ash, it is moderate when adding both slag powder and fly ash, and it is minimum when adding only slag power; and the larger the adding content, the greater the influences of the test age on the concrete’s resistance to chloride ion penetration.

• Periodical: Applied Mechanics and Materials (Volumes 357-360)
• Pages: 570-577
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.357-360.570
• Online since: August 2013
• Authors: Hong Yun Wei, Yu Guo Wei, Xiu Li Zhang, Wei Feng Zhou, Yuan Yuan Li
• Keywords: Chloride Ion Penetration, Electric Flux, Fly Ash (FA), Slag Power

References

[1] Xie Youjun, Liu Baoju, Long Guangcheng. Study on Dense Packing Properties of Cementitious Materials [J]. Journal of the Chinese Ceramic Society, 2001, 35(6): 1359-1363.

[2] Cao Fang, Ma Baoguo, Li Youguo, et al. Analysis on the Concrete Permeability and Test Methods [J]. Concrete, 2002 (10): 15-17.

[3] GB/T 50082-2009 Test Methods of Long-term Performance and Durability of Ordinary Concrete [S]. Beijing: China Architecture & Building Press, (2009).

[4] Feng Zhongwei, Li Huajian, Li Linxiang. Study on Influential Factors and Assessment Indexes of Duration Property of Concrete [J]. Railway Engineering, 2010, (10): 126-129.

[5] Luo Rui. The Mechanism of High Performance Concrete with Ground Granulated Blast Furnace Slag (GGBS) to Resist Chloride Ions Diffusion [D]. Nanjing: Hohai University, (2002).

[6] Zhang Changqing, Wu Haibing, Du Mingyue, et al. Influence of Mineral Admixtures on the Resistance to Penetration of Chloride Ion in Self-compacting Concrete [J]. Journal of Civil Engineering and Management, 2012(1): 15-19.

[7] Li Pengping, Pan Jun, Fan Zhihong, et al. Influence of Mineral Admixtures on Chloride Diffusion Coefficient for Self-compacting Concrete [J]. Concrete, 2012 (10): 18-20.