1.School of Civil Engineering, Zhengzhou Institute of Finance and Economics; Department of Architectural Engineering, Zhengzhou Shengda University of Economics, Business & Management; 3. Geotechnical and Structural Engineering Research Center, Shandong University
Abstract：
Nano-concrete is a new building material which can effectively improve the concrete frost resistance. In this paper, the effects on the salt resistance of concrete by nano-SiO2, nano-Al2O3, nano-Fe2O3 and nano-TiO2 were studied. Under three different salt conditions, the frost resistance improvement of concrete was analyzed by comparing the four kinds of nano-materials. Research shows that: with the rising of nano-materials dosage, concrete salt freezing resistance performance is improved. Combined with economic analysis, it can be concluded that the optimal dosage is 0.5%; the improving effect of nano-SiO2 is best, nano-Al2O3 shows the weakest effect; NaCl mainly damage the concrete surface and CH3COOK mainly damage the internal concrete.
