Experimental Study on Mix Proportion of Fair-Faced Concrete for Urban Bridge

Abstract:

As the needs of fair-faced concrete structures for the ecological environment, this paper studies the mix proportion of fair-faced concrete in C30 strength grade by experiments. 13 concretes were designed and tested considering the water to cement ratio, the cement content, the percent of pulverized fly ash, the sand ratio, the water reducer and the formwork parting agent. The workability of fresh concrete, the compressive strength of hardened concrete at 7d, 28d and 56d, and the apparent quality as well as the surface brightness of concrete were got. The results show that the surface color and brightness of concrete were influenced successively by the cement content, the water to cement ratio, the sand ratio and the percent of pulverized fly ash. The use of formwork lacker may bring concrete into better brightness, while the mix oil may be a good selection considering the cost of parting agent. The suitable mix proportions of C30 concrete for urban bridge are proposed.

• Periodical: Advanced Materials Research (Volumes 450-451)
• Pages: 383-386
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.450-451.383
• Online since: January 2012
• Authors: Xiao Ke Li, Xiao Lu Ma, Xiao Yan Zhang
• Keywords: Apparent Quality, Fair-Faced Concrete, Image Analysis, Mix Proportion, Parting Agent, Urban Bridge

References

[1] Y. Cai: Building Science and Technology, No. 3 (2006), p.147.

[2] H. Yu, Q. Wang and C. Li: Shanghai Building Science and Technology, No. 5 (2008), pp.69-70.

[3] Q. Li, H. Fan and S. Chen: Engineering Quality, No. 5 (2008), pp.51-54.

[4] J. Tan: Railway Construction, No. 6 (2010), pp.47-48.

[5] JGJ 169-2009: Technical Specification for Application of Fair-faced Concrete (China Building Industry Press, Beijing, 2009).

[6] GB/T 50080-2002: Standard for Test Method of Performance on Ordinary Fresh Concrete (China Building Industry Press, Beijing, 2002).

[7] GB/T 50081-2002: Standard for Test Method of Mechanical Properties on Ordinary Concrete (China Building Industry Press, Beijing, 2002).

[8] JGJ 55-2000: Specification for Mix Proportion Design of Ordinary Concrete (China Building Industry Press, Beijing, 2000).