Computers and Concrete

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

An approach of using ideal gradating curve and coating paste thickness to design concrete performance-(2) Experimental work

  • Wang, H.Y. (Department of Civil Engineering, National Kaohsiung University of Applied Sciences) ;
  • Hwang, C.L. (Department of Construction Engineering and Technology, National Taiwan University of Science and Technology) ;
  • Yeh, S.T. (Department of Construction Engineering and Technology, National Taiwan University of Science and Technology)
  • Received : 2009.09.04
  • Accepted : 2011.10.24
  • Published : 2012.07.25
⟨ Previous Next ⟩

Abstract

The ideal gradating curve is used in this study to estimate densified aggregate blended ratio and total surface area of aggregate, there by under assigned paste amount of concrete, and coating paste thickness can then be deduced. Four groups of concrete mixtures were prepared and the corresponding concrete properties, such as workability, compression strength, ultrasonic velocity, surface resistivity and chloride ion penetration, were measured and finally the results are interpreted in terms of "coating thickness". The result shows as the coating thickness of the concrete is higher than critical one, the coating thickness on aggregate does affect the workability, and whatever workability is required the superplasticizer can be adjusted to achieve the demand workability. Under a fixed paste quality at the same age, coating paste thickness is inversely proportional to the concrete properties, especially as the coating thickness gets thinner.

Keywords

References

  1. ACI Committee, Building code requirements for structural concrete (ACI 318-89) and (ACI 318-95).
  2. ASTM C 1202-97 (1997), "Standard test method for electrical indication of concrete's ability to resist chloride ion Penetration".
  3. Chang, P.K., Peng, Y.N. and Hwang, C.L. (2001), "A design consideration for durability of high-performance concrete", Cement Concrete Comp., 23(4-5), 375-380. https://doi.org/10.1016/S0958-9465(00)00089-5
  4. Chan, Y.W. and Chu, S.H. (2004), "Effect of silica fume on steel fiber bond characteristics in reactive powder concrete", Cement Concrete Res., 34(7), 1167-1172. https://doi.org/10.1016/j.cemconres.2003.12.023
  5. Hwang, C.L. (2008), The property and behavior of concrete, James PublisherTaipei.
  6. Hwang, C.L. and Chen, Y.Y. (2002), "The property of self-consolidating concrete designed by densified mixture design algorithm", Proceedings of First North American Conference on the Design and Use of Selfconsolidating Concrete, ACBM, 121-126.
  7. Hwang, C.L. (2012), High performance concrete theory and practice, James Publisher, Taipei.
  8. Lee, L.S. and Hwang, C.L. (2002), "A quality assurance system of SCC in taiwan", Proceedings of First North American Conference on the Design and Use of Consolidating Concrete, ACBM, 275-280.
  9. Lee, M.G., Hwang, C.L. and Chiu, C.T. (2005), "A preliminary study of reactive powder concrete as a new repair material", Constr. Build. Mater., 21(1), 182-189.
  10. Lo, S.Y. (2003), The effect of the quality and quantity of superplasticizer on the property of concrete, thesis of National Taiwan University of Science and Technology Department of Construction Engineering, Taipei.
  11. Tsai, C.T. (1997), The effect of the aggregate packing on the engineering properties of eugenic concrete, thesis of National Taiwan University of Science and Technology Department of Construction Engineering, Taipei.

Cited by

  1. Genetic algorithm in mix proportion design of recycled aggregate concrete vol.11, pp.3, 2013, https://doi.org/10.12989/cac.2013.11.3.183