International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
권호 표지
DOI QR코드

DOI QR Code

Tests on Cementless Alkali-Activated Slag Concrete Using Lightweight Aggregates

  • Yang, Keun-Hyeok (KCI Member, Kyonggi University, Dept. of Architectural. Eng.) ;
  • Mun, Ju-Hyun (KCI Member, Mokpo National University, Dept. of Architectural. Eng.) ;
  • Lee, Kang-Seok (KCI Member, Chonnam National University, Dept. of Architectural. Eng.) ;
  • Song, Jin-Kyu (KCI Member, Chonnam National University, Dept. of Architectural. Eng.)
  • Received : 2011.06.07
  • Accepted : 2011.10.25
  • Published : 2011.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

Five all-lightweight alkali-activated (AA) slag concrete mixes were tested according to the variation of water content to examine the significance and limitation on the development of cementless structural concrete using lightweight aggregates. The compressive strength development rate and shrinkage strain measured from the concrete specimens were compared with empirical models proposed by ACI 209 and EC 2 for portland cement normal weight concrete. Splitting tensile strength, and moduli of elasticity and rupture were recorded and compared with design equations specified in ACI 318-08 or EC 2, and a database compiled from the present study for ordinary portland cement (OPC) lightweight concrete, wherever possible. Test results showed that the slump loss of lightweight AA slag concrete decreased with the increase of water content. In addition, the compressive strength development and different mechanical properties of lightweight AA slag concrete were comparable with those of OPC lightweight concrete and conservative comparing with predictions obtained from code provisions. Therefore, it can be proposed that the lightweight AA slag concrete is practically applicable as an environmental-friendly structural concrete.

Keywords

References

  1. Gartner E., "Industrially interesting approaches to low- CO2 cements," Cement and Concrete Research, Vol. 34, No. 9, 2004, pp. 1489-1498. https://doi.org/10.1016/j.cemconres.2004.01.021
  2. Mehta P. K., "Reducing the environmental impact of concrete," Concrete International, Vol. 23, No. 10, 2001, pp. 61-66.
  3. Yang, K. H., Hwang, H. J., Kim, S. Y., and Song J. K., "Development of a cementless mortar using hwangtoh binder," Building and Environments, Vol. 42, No. 10, 2007, pp. 3717-3725. https://doi.org/10.1016/j.buildenv.2006.09.006
  4. Pacheco-Torgal, F., Castro-Gomes, J., and Jalali, S., "Alkaliactivated binders: a review. part 2. about materials and binder manufacture," Construction and Building Materials, Vol. 22, No. 7, 2007, pp. 1305-1314.
  5. Shi, C., Krivenko, P. V., and Roy, D., Alkali-activated cements and concretes, Taylor and Francis, 2006.
  6. Wang, S. D., Pu, X. C., Scrivener, K. L., and Pratt, P. L., "Alkali-activated slag cement and concrete: a review of properties and problems," Advanced Cement Research, Vol. 7, No. 27, 2006, pp. 93-102.
  7. Unal, O., $Uyguno{\eth}lu$, T., and Yildiz, A., "Investigation of properties of low-strength lightweight concrete for thermal insulation," Building and Environments, Vol. 42, No. 2, 2007, pp. 584-590. https://doi.org/10.1016/j.buildenv.2005.09.024
  8. Neville, A. M., Properties of Concrete, Longman. England, 95 pp.
  9. Mouli, M., Khelafi, H., "Performance characteristics of lightweight aggregate concrete containing natural pozzolan," Building and Environments, Vol. 43, No. 1, 2008, pp. 31-36. https://doi.org/10.1016/j.buildenv.2006.11.038
  10. Kayali, O., "Fly ash lightweight aggregates in high performance concrete," Construction and Building Materials, Vol. 22, No. 12, 2008, pp. 2393-2399. https://doi.org/10.1016/j.conbuildmat.2007.09.001
  11. Collins, F. and Sanjayan, J. G., "Strength and shrinkage properties of alkali-activated slag concrete containing porous coarse aggregate," Cement and Concrete Research, Vol. 29, No. 4, 1999, pp. 607-610. https://doi.org/10.1016/S0008-8846(98)00203-8
  12. Yang, K. H., Song, J. K., and Lee J. S., "Properties of alkaliactivated mortar and concrete using lightweight aggregates," Building and Structures, Vol. 43, No. 2, 2010, pp. 403-416.
  13. ACI 209R-92, Prediction of creep, shrinkage, and temperature effects in concrete structures, ACI Manual of Concrete, Practice Part 1, USA, 1994.
  14. ACI Committee 318, Building code requirements for structural concrete (ACI 318-08) and Commentary (ACI 318R-08), American Concrete Institute, 2008.
  15. European Standard EN 1992-1-1 (Eurocode 2), Design of concrete structures, British Standards Institution, London, UK, 2004.
  16. Slate, F. O., Nilson, A. H., and Martinez, S., "Mechanical properties of high-strength lightweight concrete," ACI Journal, Vol. 83, No. 4, 1986, pp. 606-613.
  17. Yang, K. H., Modeling of the mechanical properties of structural lightweight concrete based on size effects, Technical report, Kyonggi University, South Korea, 2010.
  18. Yang, K. H., Sim, J. I., and Nam, S. H., "Enhancement of reactivity of calcium hydroxide-activated slag mortars by the addition of barium hydroxide," Construction and Building Materials, Vol. 24, No. 3, 2009, pp. 241-251.
  19. ACI 211.2-98, Standard practice for selecting proportions for structural lightweight concrete, ACI Committee 211, ACI Standard Practice, USA, 1998.
  20. Korean Standards Information Center, Korean industrial standard: testing concrete: KS F 2402-KS F 2414, South Korea, 2006.
  21. Yang, K. H., Song, J. K., Ashour, A. F., and Lee, E. T., "Properties of cementless mortar activated by sodium silicate," Construction and Building Materials, Vol. 22, No. 8, 2008, pp. 1981-1989. https://doi.org/10.1016/j.conbuildmat.2007.07.003

Cited by

  1. Resistance to Corrosion of Reinforcement of High Volume Fly Ash Concrete vol.13, pp.6, 2014, https://doi.org/10.14773/cst.2014.13.6.209
  2. -Activated Hwangtoh Concrete vol.2014, pp.1537-744X, 2014, https://doi.org/10.1155/2014/846805
  3. Investigations on Alkali-Activated Slag/Fly Ash Concrete with steel slag coarse aggregate for pavement structures vol.18, pp.6, 2017, https://doi.org/10.1080/10298436.2015.1095902
  4. Effect of Sand Content on the Workability and Mechanical Properties of Concrete Using Bottom Ash and Dredged Soil-based Artificial Lightweight Aggregates vol.13, pp.1, 2019, https://doi.org/10.1186/s40069-018-0306-z