Study on Frost Resistance Durability of Lightweight Aggregate Concrete Improved by Fiber

Abstract:

Pumice, polypropylene fiber, steel fiber and fly ash were used to compound fiber reinforced lightweight aggregate concrete (LWAC). The effect of fibers on frost resistance durability of LWAC is studied, which including freezing-thawing in 5% Na₂SO₄ solution and in water. The test results show that the strength loss of LWAC is reduced with the increase in fiber fraction, but the impact of mass loss is not obvious by mixing fiber. LWAC freezing-thawing deterioration is even more serious in salt solution than in water. SEM photo show that polypropylene fiber has more stronger cementing bond with paste than steel fiber. the mass loss and strength loss are decreased significantly. By introduction silica fume can improve Interfacial Transition Zone（ITZ）and the frost resistance of fibers reinforcement LWAC dramatically.

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 822-827
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.822
• Online since: May 2011
• Authors: Jun Fang Huo, Hui Yang, Yong Li Hou, Jian Jun Chu, Wei Ling Li
• Keywords: Frost Resistance Durability, Interfacial Transition Zone, Lightweight Aggregate Concrete (LWAC), Polypropylene (PP) Fiber, Steel Fiber (SF)

References

[1] Weiliang Jin, Yuxi Zhao. Concrete structure durability[M]. Beijing: Science Press (2002), pp.74-75 (in Chinese)

[2] Junfang Huo, Xiangdong Shen, Qi Cui. Effect of polypropylene fiber on mechanical properties of lightweight aggregate concrete[J]. Bulletin of the Chinese Ceramic Society, Vol.26,No.4 (2007), pp.700-704 (in Chinese)

[3] Ru Mu. The durability evaluation and life prediction of concrete under freeze-thaw cycles, external bending stress and salt solution[D] (2000). Southeast University (in Chinese)

[4] Xiaolong Zhao. Research on the durability and evaluation of high performance concrete in cold region [D] (2001), Harbin Institute of Technology (in Chinese)

[5] Chengkui Huang. Fiber reinforced concrete structures [M]. Beijing: Mechanical Industry Press (2004), pp.83-84 (in Chinese)