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Advances in Materials Science and Engineering
Volume 2016, Article ID 9520294, 9 pages
Research Article

Effect of Water-Cement Ratio on Pore Structure and Strength of Foam Concrete

1Department of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China
2Sichuan College of Architectural Technology, Deyang 618000, China

Received 4 August 2016; Revised 18 September 2016; Accepted 22 September 2016

Academic Editor: Sumin Kim

Copyright © 2016 Zhongwei Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Foam concrete with different dry densities (400, 500, 600, 700, and 800 kg/m3) was prepared from ordinary Portland cement (P.O.42.5R) and vegetable protein foaming agent by adjusting the water-cement ratio through the physical foaming method. The performance of the cement paste adopted, as well as the structure and distribution of air pores, was characterized by a rheometer, scanning electron microscope, vacuum water saturation instrument, and image analysis software. Effects of the water-cement ratio on the relative viscosity of the cement paste, as well as pore structure and strength of the hardened foam concrete, were discussed. Results showed that water-cement ratio can influence the size, distribution, and connectivity of pores in foam concrete. The compressive strength of the foam concrete showed an inverted V-shaped variation law with the increase in water-cement ratio.