Research on Properties of Low Grade Cement-Based Composite Materials Modified by Silica Fume

Abstract:

In order to notably improve the mechanical properties and durability of low-grade cement-based material, superfine silica fume was used to modify the cement-based composite based on special perfomance and effects of nano powder. The mechanical performance and durability were investigated.Then the phase compositions,microstructure and morphologies of as-received cement-based composite were studied by X-ray Diffractometer、TGA-DTA and SEM. The results show that： the best formula of raw materials is 1:1:0.025:0.015, and hydration can be accelerated and increasing of hydration products is observed after modification. In the hardened cement matrix, microstructure is very compacted and C-S-H gel forms densed structure, so the structure defect is notably reduced. This means that both strength and durability of cement-based composite are notably improved by the addition of superfine silica fume.

• Periodical: Applied Mechanics and Materials (Volumes 174-177)
• Pages: 751-756
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.174-177.751
• Online since: May 2012
• Authors: Zi Fang Xu, Ming Xu Zhang, Jin Hua Li
• Keywords: Cement-Based Material, Durability, Hydration Product, Silica Fume (SF)

References

[1] WANG Zhi-yong, ZHANG Wen-sheng, YE Jia-yuan.Bulletin of the Chinese Ceramic Society, 2009，28（4）：761-765. (in chinese)

[2] XIE De-wen.Sci-tech Information Development & Economy, 2008,18 (16)：120-122. (in chinese)

[3] JIANG Zheng-wu,LI Xiong-ying.Journal of the Chinese Ceramic Society, 2010,38（4）：602-607. (in chinese)

[4] William D.Callister,Jr.Beijing: Chemical Industry Press, 2006.

[5] Mo Liwu,Deng Min.Cement and Concrete Research, 2006,36（3）：1992-1998(in chinese)

[6] DU Ying-ji,HAN Su-jian,YAO Ru-fang.Journal of Northwest Sci-tech University of Agriculture and Forestry ( Natural science edition ), 2004,7(7)：107-110. (in chinese)

[7] XU Xun, LU Zhong-yuan.Journal of the Chinese Ceramic Society, 2007,35(4)：478-484. (in chinese)

[8] Esam M. Alawadhi .Energy and Buildings ,2007,40(3):1-7(in chinese)

[9] YE Qing. New Building Materials, 2001(11):4-7.(in chinese)

[10] XIONG Guo-xuan, China concerete and cement products, 2002(5):18-22. (in chinese)

[11] SHAOHui-fang,LIUChang-sheng,HUANGYue.Journal of Inorganic Materials, 2001,16（5）:933-938. (in chinese)