JOURNAL BROWSE
Search
Advanced SearchSearch Tips
A Study on the Bond Strength of Coated Rebar by Polymer Cement Slurry Made of EVA and Ultra High-Early Strength Cement
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A Study on the Bond Strength of Coated Rebar by Polymer Cement Slurry Made of EVA and Ultra High-Early Strength Cement
Hyung, Won-gil; Jo, Young-Kug;
  PDF(new window)
 Abstract
Polymer cement slurry (PCS) is made from organic polymer dispersion and cement has good adhesion to steel, waterproofness and acid resistance due to being of polymer films formed in cement slurry. The purpose of this study is to evaluate the bond strength of coated rebar by polymer cement slurry made of EVA and ultra high-early strength cement. The test pieces are prepared with EVA polymer dispersion and ultra high-early strength cement having four types of polymer-cement ratios, four types of coating thicknesses and four curing ages, and tested for the bond strength test. From the test results, in general, bond strength of PCS-coated rebar is better than that of uncoated rebar and epoxy-coated rebar. It is also high bond strength at curing ages of 7-day, and coating thicknesses of and . The maximum bond strength of PCS-coated rebar with ultra high-early strength cement and EVA at polymer-cement ratio of 80%, and coating thickness of is about 1.32 and 1.38 times respectively, the strength of uncoated rebar and epoxy-coated rebar. It is apparent that the curing age, coating thickness, type of polymer and cement are very important factors to improve the bond strength of PCS-coated rebar to cement concrete. We can have basic information that PCS-coated rebar with polymer-cement ratio of 80% or 100% and coating thickness of at curing age of 1-day can replace epoxy-coated rebar.
 Keywords
polymer cement slurry;bond strength;polymer-cement ratio;coating thickness;curing age;
 Language
Korean
 Cited by
 References
1.
Choi, O. C., "Bond of epoxy-coated reinforcing bars", Proceedings of 1990 AIK Autumn Annual Conference, Vol.10, No.2, 1990, pp.539-542.

2.
Yu, T. H., "An experimental study for the bond performance of the epoxy-coated reinforcement in marine concrete structures", Hanyang University, Master's thesis, 1996, pp.34-35.

3.
Shin, Y., and Choi, O., "Bond Properties of Epoxy Coated Bars in High Strength Concrete", Journal of the Architectural Institute of Korea, Vol.6, 1997, pp.209-214.

4.
Oh, B. H., "An experimental study on corrosion resistance of epoxy coated reinforcements", Journal of the Korea Concrete Institute, No.4, 1992, pp.61-70.

5.
ACI 440.1R-06, Guide for the Design and Construction of Concrete Reinforced with FRP Bars, Farmington Hills (MI, USA), American Concrete Institute, 2006.

6.
Jo, Y. K., "A study on the bond performance and anti-corrosion of polymer cement composites coated steel", Journal of the Architectural Institute of Korea, Vol.22, No.8, 2006, pp.101-108.

7.
Jo, Y. K., and Jeong, S. P., "A Study on the performance tests of polymer cement slurry-coated steels", Journal of Korean Society of Civil Engineers, Vol.27, No.5A, 2007, pp.759-769.

8.
Jo, Y. K., "Tensile Properties and Adhesion of Hybrid-Type Anti-Corrosion Polymer Cement Slurry", Journal of the Korea Concrete Institute, Vol.20, No.5, 2008, pp.635-642. crossref(new window)

9.
Jo, Y. K., "Adhesion and impact properties of polymer cement slurry-coated steel plate and deformed bar", Journal of the Architectural Institute of Korea, Vol.26, No.5, 2010, pp.91-100.

10.
Jo, Y. K., Park, D. Y., and Jang, G. S., "Effects of mix proportions and coating thickness on the bond strength of coated rebar by polymer cement slurry" Journal of Architectural Institute of Korea, Vol.27, No.6, 2011, pp.107-114.

11.
Jo, Y. K., "Effects of early age and coating thickness of polymer cement slurry-coating material on the bond strength of rebar to cement concrete", Journal of Architectural Institute of Korea, Vol.28, No.10, 2012, pp.97-104.

12.
Jo, Y. K., Jeong, S. H., and Kim, W. K., "Bond strength pf polymer cement slurry-coated rebar using EVA latex in cement concrete", Advance materials Research, Vol.687, 2013, pp.175-184. crossref(new window)

13.
Jo, Y. K., and Jeong, S. H., "Properties of coating materials effected on the bond strength of polymer-cement slurry coated rebar", Journal of the Construction and Environment Research Institute, Vol.9, No.1, 2014, pp.87-95.

14.
RILEM 7-II-128.RC6: bond test for reinforcing steel. 1. Pull-out Test. RILEM technical recommendations for the testing and use of construction materials, 1994, pp.102-105.

15.
Y. Ohama., "HandBook of Polymer-Modified Concrete and Mortars", Noyes Publications, New Jersey, U.S.A, 1995, p.225.

16.
CEB-FIP, CEB-FIP model code 1990, Thomas Telford, Lausanne, 1992.