Autoclaved reactive powder concrete: the effects of steel micro-fibers and silica fume dosage on the mechanical properties
Abstract
Reactive Powder Concrete (RPC) is a type of ultra-high performance cement based composite with high strength and ductility. RPC was developed in the 1990s by Bouygues' laboratory in France. It is a special type of concrete which has properly optimized micro grain, binder phase and steel micro-fibers. RPC can achieve compressive strength values between 150–800 MPa, while traditional concrete which is used in current structures usually has 20–50 MPa compressive strength. In addition, its high performance under flexural loads is the most important advantage of RPC in the field of civil engineering. RPC has the potential to compete with steel from the point of aesthetics and structural capability. One of the curing methods to enhance the strength of this composite material is autoclaving. Autoclave curing needs additional SiO2 source to fill micro pores and strengthen hydration products. In the scope of this study, the effect of volume fraction of steel micro-fibers and silica fume dosage as SiO2 source on mechanical properties of RPC under autoclave curing was investigated. High performance cementitious composites were produced with 0%, 1%, and 2% volume fractions of steel micro-fibers. Nine mixtures with three different silica fume dosages were produced. Workability of fresh state and flexural-compressive strengths of hardened specimens were determined. In addition, fracture energies of the mixtures under bending loads were evaluated.
References
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- Yazıcı H, Yardımcı MY, Aydın S and Karabulut AŞ. Mechanical properties of reactive powder concrete containing mineral admixtures under different curing regimes. Construction and Building Materials, 2009; 23: 1223 – 1231.
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Abstract
References
- Richard P and Cheyrezy M. Composition of reactive powder concretes. Cement and Concrete Research, 1995; 25: 1501 – 1511.
- Yazıcı H, Yardımcı MY, Aydın S and Karabulut AŞ. Mechanical properties of reactive powder concrete containing mineral admixtures under different curing regimes. Construction and Building Materials, 2009; 23: 1223 – 1231.
- Wong YL, Lam L, Poon CS and Zhou FP. Properties of fly ash modified cement mortar–aggregate interfaces. Cement and Concrete Research, 1999; 29: 1905 – 19
- Neville AM. Properties of concrete. John Wiley & Sons, New York, 1973.
- Odler I. Hydration setting and hardening of Portland cement. Lea’s chemistry of cement and concrete, 4th edition, Elsevier Science & Technology, UK, 2004. Yazıcı H, Deniz E and Baradan B. The effect of autoclave pressure, temperature and duration time on mechanical properties of reactive powder concrete. Construction and Building Materials, 2013; 42: 53 – 63.
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | July 27, 2014 |
| Published in Issue | Year 2014 Volume: 3 Issue: 1 |