Research on Chloride Penetration Resistance of Hybrid Fiber Reinforced Self-Compacting Concrete
The properties of chloride penetration of hybrid fiber reinforced self-compacting concrete (SCC) were investigated in this study. The results show that the chloride penetration resistance of concrete can be improved by single incorporation either carbon or cellulose fibers. The concrete chloride diffusion coefficient DRCM of 12-cm length carbon SCC with fiber content of 1.7, 2.72, and 3.4 kg/m3 decreases by 10.3, 25.5, and 18.2% compared to reference concrete without any fibers, respectively. Moreover, the concrete chloride diffusion coefficient DRCM of cellulose SCC with fiber content of 1.2, 1.6, and 2.0 kg/m3 decreases by 18.8, 22.4, and 26.7% compared to reference concrete, respectively. Based on the results of orthogonal experimental design, the chloride diffusion coefficients DRCM of hybrid fiber reinforced SCC are listed in order of importance, as follows: length of carbon fiber > content of carbon fiber > content of cellulose fiber; furthermore, the hybrid of 2.72-kg/m3 carbon fiber with length of 12 mm and 2.0-kg/m3 cellulose fiber exhibits the most significant effect on chloride diffusion coefficients DRCM of SCC.
Properties of eco-friendly basalt fibre reinforced concrete designed by Taguchi method
Abstract This study was carried out to investigate the effect of various parameters on the properties of eco-friendly basalt fibre reinforced concrete. In order to achieve eco-friendly fibre reinforced concrete, fly ash was used to replace Portland cement up to 60% and recycled glass to replace the fine aggregate up to 100%. Chopped basalt fibre which is an eco-friendly fibre was used at different dosages to reinforce the concrete mixtures. In order to evaluate the effect of these parameters on the performance of the concrete, the Taguchi method was employed for the design and optimization of the mechanical properties of the mixtures. Based on the experimental design, a total of sixteen mixtures were designed and made. The properties of the concrete mixtures in terms of fresh and mechanical properties were evaluated alongside the determination of the influence of the parameters. Results from this study showed that the use of basalt fibre at a dosage of 0.2% is optimum in terms of the overall properties.
Britain and the Problem of International Disarmament: 1919-1934
Acknowledgements 1. Introduction 2. The Concept and Context of Disarmament, 1919-1934 3. The Human Element 4. The Lloyd George Coalition Government, 1918-1922 5. The Conservative Governments, 1922-1923, and the First Labour Government, 1924 6. The Conservative Government, 1924-1929 7. The Labour Government, 1929-1931 8. The National Government, 1931-1934 9. Conclusion Bibliography