Bond Properties in Lightweight Self-Compacting Concrete

Abstract:

The original development and use of Self-Compacting Concrete (SCC) in Japan started from the problem of the durability of concrete. Indeed, the reduction in the number of skilled workers, and the consequent poor compaction of structures, was a topic of great concern in the eighties, and helped the introduction of SCC. More recently, SCC is being commonly used in solid concrete slab in residential buildings for its excellent flowability. Additionally, to reduce structural self-weight without excessively affecting the slab thickness (which could represent a major issue in this applications), lightweight concrete represents a preferable solution. In this type of structure the development of anchorage or lap length becomes crucial, thus requiring a proper understanding of the bond mechanism. The result of an experimental campaign to assess bond properties for Lightweight Self-Compacting Concrete (LWSCC) are presented in this paper. The main investigated parameter is the bar size (ranging from 8 to 24mm) while the cover to diameter ratio and the bonded length to diameter ratio were kept constant. The experimental results are finally compared with code predictions.

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 211-217
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.211
• Online since: September 2016
• Authors: Giovanni Muciaccia*, Gianpaolo Rosati
• Keywords: Bond Properties, Lightweight Concrete, Self-Compacting Concrete

References

[1] J. Tragardh, in A. Skarendahl and Ö. Petersson (Eds), Microstructural features and related properties of self-compacting concrete, RILEM Symp. of SCC, Stockholm, 1999, pp.175-186.

[2] Zhu W. and Bartos P.J.M., Micromechanical proprieties of interfacial bond in Self Compactig Concrete, Proc. of RILEM Int. Symp. Bond in Concrete–from research to standards, Budapest, 2002, pp.387-394.

[3] M. Sonebi and P.J.M. Bartos, Bond behavior and pull-out test of Self Compacting Concrete, Proc. of RILEM Int. Symp. Bond in Concrete–from research to standards, Budapest, 2002, pp.511-519.

[4] M. Lorrain and A. Daoud, Bond in Self-Compacting Concrete, Proc. of RILEM Int. Symp. Bond in Concrete – from research to standards, Budapest, 2002, pp.529-536.

[5] G. Muciaccia, S. Cattaneo, G. Rosati and S. Cangiano, Properties of limestone self-compacting concrete at fresh and hardened state, European Journal of Environmental and Civil Engineering, 19 (2015) 598-613.

DOI: 10.1080/19648189.2014.960144

[6] Y. J. Kim, Y. W. Choi, M. Lachemi, Characteristics of self-consolidating concrete using two types of lightweight coarse aggregates, Construction and Building Materials 24 (2010), pp.11-16.

DOI: 10.1016/j.conbuildmat.2009.08.004

[7] G.E. Abdelaziz, A study on the performance of lightweight self-consolidated concrete, Magazine of Concrete Research, 62 (2010), pp.39-49.

DOI: 10.1680/macr.2008.62.1.39

[8] RILEM. Technical Recommendations for the Testing and Use of Construction Materials: RC 6, Bond Test for Reinforcement Steel. 2. Pull-out test (1983).

DOI: 10.1201/9781482271362-157

[9] Eurocode 2. EN 1992-1-1: Design of concrete structures. European Committee for Standardization, Brussels, Belgium (2004).