By Krasnov N.F.
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Extra info for Aerodynamics part 1
87-95 (in French). 8. K, Preparation of highly reinforced steel fibre reinforced concrete composites, (American Concrete Institute, Detroit, 1984), Fiber reinforced concrete, SP-81, pp. 286-306. 9. , Engineered Cementitious Composites - Tailored composites through micromechanical modeling, Fiber Reinforced Concrete: Present and the futur, Montreal, Canadian Society for Civil Engineering, (1998), pp. 64-97. 10. , Effect of steel fibres at two stages: the material and the structure, Materials and Structures, (1987), vol.
15 mm in diameter. 16 mm in diameter. This type of concrete was developed by the company Bouygues (France) and has been marketed under the name of RPC (Reactive Powder Concrete) ; UHPFRC containing mixtures of short and long metal fibres. This type of concrete, known as MSCC (Multi-Scale Cement Composite), was developed by the Laboratoire Central des Ponts et Chaussees (LCPC, France) . Two other types of fibre reinforced concrete, SIFCON (Slurry Infiltrated Fibered Concrete)  and ECC (Engineered Cementitious Composite) , have been developed concurrently with those described above, but we feel they differ slightly from UHPFRCs.
The results of both mechanical and leaching tests showed the importance of the contaminant/matrix pair considered. The setting time was reduced in presence of chromium and delayed in presence of manganese, lead and zinc. Although the early strength development was quite affected in presence of all four contaminants, the long-term strength was comparable to the controls. From 56 days of curing onwards, partial replacement of cement by silica fume was proven to increase the strength of all materials.