Properties and Thermal Stress Analysis of Blended Cement Self-Compacting Concrete
- 1 Graduate School of Engineering, Ashikaga Institute of Technology, Ashikaga, Japan
- 2 Graduate School of Engineering, Ashikaga Institute of Technology, Ashikaga, Japan
- 3 Department of Civil Engineering, Ashikaga Institute of Technology, Ashikaga, Japan
- 4 Department of Civil Engineering, Ashikaga Institute of Technology, Ashikaga, Japan
Abstract
Self-Compacting concrete is a concrete that is able to flow and consolidate under its own weight, completely fill the formwork even in the presence of dense reinforcement, whilst maintaining homogeneity and without the need for any additional compaction. Self-Compacting concrete is achieved by using high proportions of powder content and super?plasticizers. Due to this, pronounced thermal cracking is anticipated. Thermal cracking in concrete structures is of great concern. The objective of this research is to carry out experiments and investigate fresh and hardened properties of SCC developed using a blend of ordinary Portland cement and ground granulated blast furnace slag (GGBFS), to evaluate the applicability of Japan Concrete Institute (JCI) model?equations and?to find out any similarities and differences between Self-?Compacting concrete and normal vibrated concrete—Portland blast furnace slag concrete class B. Thermal stress analysis of the proposed Self-Compacting concrete and normal vibrated concretes were investigated by simulation using 3D FEM analysis. To carry out these objectives, concrete properties such as autogenous shrinkage, adiabatic temperature rise, drying shrinkage, modulus of elasticity, splitting tensile strength and compressive strength were determined through experiments. From experimental results, it was observed that except for the fresh properties, the hardened properties of Self-Compacting exhibit similar characteristics to those of normal vibrated concrete at almost similar water to binder ratios. It was also established that Self-Compacting concrete at W/B of 32% with a 50% replacement of ground granulated blast furnace slag has better thermal cracking resistance than SCC with 30% GGBFS replacement. It is also found that provided the relevant constants are derived from experimental data, JCI model equations can be applied successfully to evaluate hardened properties of Self-Compacting concrete.
- Ouchi, M., Nakamura, S.-A., Osterberg, T. and Lwin, M. (2003) Applications of Self-Compacting Concrete in Japan, Europe and The United States. ISHPC, Transport Research Board, USA. https://trid.trb.org/view/698204
- Aggarwal, P., Siddique, R., Aggarwal, Y. and Gupta, S.M. (2008) Self-Compacting Concrete—Procedure for Mix Design. Leonardo Electronic Journal of Practices and Technologies, No. 12, 15-24.
- Seddik, A., Beroual, A., Zergua, A. and Guetteche, M. (2013) Self-Compacting Concrete under Local Conditions. Open Journal of Civil Engineering, 3, 119-125. https://doi.org/10.4236/ojce.2013.32014
- RILEM TC 119-TCE (1997) Avoidance of Thermal Cracking in Concrete in Early Ages. Materials and Structures, 30, 451-464.
- Japan Society of Civil Engineers (2012) Recommendation for Mix Design and Construction of Self-Compacting Concrete. JSCE, Tokyo.
- European Federation for Specialist Construction Chemicals and Concrete Systems (2002) Specification and Guidelines for Self-Compacting Concrete. EFNARC, Farnham, UK.
- JIS A 6206 (2013) Ground Granulated Blast Furnace-Slag for Concrete. Japanese Standards Association, Tokyo.
- Japan Concrete Institute (2016) Guidelines for Control of Cracking of Mass Concrete. JCI, Tokyo
- Parra, C., Valcuende, M. and Gomez, F. (2011) Splitting Tensile Strength and Modulus of Elasticity of Self-Compacting Concrete. Construction and Building Materials, 25, 201-207. https://doi.org/10.1016/j.conbuildmat.2010.06.037
- Mehta, P.K. and Monteiro, P.J.M. (2006) Concrete: Microstructure, Properties and Materials. 3rd Edition, McGraw-Hill, New York.
- Portland Cement Association (1997) Portland Cement, Concrete and Heat of Hydration. Concrete Technology Today, 18, No. 2.
- ASTM C157/157M (2008) Standard Test Method for Length Change of Hardened Hydraulic Cement Mortar and Concrete. ASTM International.
- Ryoichi, S., Shigeyuki, S., Tsutomu, K., Toshiharu, K., Takafumi, N., Toshiaki, M. and Shingo, M. (2013) JCI Guidelines for Control of Cracking of Mass Concrete 2008. Third International Conference on Sustainable Construction Materials and Technologies (SCMT3), Kyoto.
- Yamamoto, T. and Takeshi, O. (2012) Practices for Crack Control of Concrete in Japan. CONCRACK3—RILEM-JCI International Workshop on Crack Control of Mass Concrete and Related Issues Concerning Early Age Concrete Structures, Paris.