Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Different Types of Oil based Shrinkage Reducing Admixture on the Fundamental Properties and Autogenous Shrinkage of High Strength Concrete

유지류를 중심으로 한 수축저감제 종류 변화가 고강도 콘크리트의 기초물성 및 자기수축에 미치는 영향

  • Jo, Man-Ki (Department of Architectural Engineering, Chenogju University) ;
  • Han, Cheon-Goo (Department of Architectural Engineering, Chenogju University)
  • Received : 2016.06.09
  • Accepted : 2016.10.28
  • Published : 2016.10.30
⟨ Previous Next ⟩

Abstract

In this research, the fundamental properties and autogenous shrinkage behaviors of high strength concrete of 0.30 water-to-binder ratio was evaluated depending on the various shrinkage compensating admixtures such as soybean oil (BO), wasted cooking oil (WO), and emulsified refined cooking oil (ERCO) comparing to commercial shrinkage reducing admixture (SR), and expanding admixture (EA). According to the experiment results, the workability of the concrete mixture showed decreased when it contained BO, and WO rather than Plain. In the case of ERCO, due to the water dispersing effect caused by emulsification, similar workability was obtained to Plain. For compressive strength, the concrete mixtures with BO, and WO decreased compressive strength rather than Plain concrete mixture, while the concrete mixture with ERCO showed decreased compressive strength at early age and recovered strength at later age. Regarding the autogenous shrinakge reducing performance, the oil-based admixtures of BO, WO, and ERCO showed better performance than SR and EA; it is considered that the saponification, the hydrolyzed reaction of fatty-acid from oils by calcium hydroxide, the hydration product of cement paste, contributes on filling the capillary pores of the concrete matrix, and thus it decreases the shrinkage. eventually, workability, strength, autogenous shrinkage reducing of 30~40 %, and economical aspects, it can be state that using ERCO may be an efficient solution for autogenous shrinkage of high strength concrete.

Keywords

Acknowledgement

Supported by : 청주대학교

References

  1. Tazawa, E. & Miyazawa, S. (1995). Experimental Study on Mechanism of Autogenous of Concrete, Cement and Concrete Research, 25(8), 1633-1638. https://doi.org/10.1016/0008-8846(95)00159-X
  2. Lee, B., Kim, K., Moon, H., Sim, Y., Jung, Y., & Han, C. (2004). Properties of Shrinkage in Concrete Incorporating Shrinkage Reducing Agent and Expansive Additive, Journal of the Korea Institute of Building Construction Fall Conference, 4(1), 61-64. https://doi.org/10.5345/JKIC.2004.4.2.061
  3. Kim, G., Sohn, Y., Yang, I., Hukuyama, H., Yoon, H., & Kim, M. (2003). Bending Property of Composited Ductile Fiber Reinforced Cementitious Composite, Journal of the Korea Concrete Institute Spring Conference, 5(1), 367-372.
  4. Han, D., Park, B., Baek, D., Song, Y., Kim, T., & Han, C. (2007). Investigation of the High Strength Mortar in Accordance with Various Non-water Based Liquid Types, Journal of the Korea Institute of Building Construction Fall Conference, 7(2), 61-64.
  5. Han, M. & Song, I. (2010). Autogenous Shrinkage and Fundamental Properties of the High Strength Mortar Containing Waste Vegetable Oil, Journal of the Korea Recycled Construction Resource Institute, 5(1), 97-102.
  6. Moon, H. (2004). Engineering Properties of High Performance Concrete with the Combination of Expansive Additive and Shrinkage Reducing Agent, Master's course Thesis, Cheongju University, 104.
  7. Park, S. (2008). Study on the Autogenous Shrinkage Prediction of High Strength Concrete using Shrinkage Reducing Admixture, Journal of the Architectural Institute of Korea, 24(11), 77-84.
  8. Kin, T. (2009). A Study on the Engineering Properties of the Concrete with the Types of Non Water Based Liquid, Master's course Thesis, Cheongju University, 123.
  9. Han, C. & Kim, G. (1998). New Method for Evaluating the Segregation Resistance of High-Fluidity Concrete, Journal of the Korea Institute of Building Construction, 10(2), 147-154.