Vojtech Vaclavik

By Ivan Janotka, Pavel Martauz, Michal Bačuvčík and Vojtĕch Václavík

Hybrid cement (H-Cement/HC) takes advantages of the material properties of cement and alkali-activated cement with the resulting benefit on utility properties so that hybrid cement can replace in large quantities ordinary Portland cement (PC) as follows: H-Cement is used by the same way as traditional cements; H-Cement is suitable for use in ready-mixed concrete up to C30/37 strength class; H-Cement has shrinkage-reducing and alkali-aggregate-mitigating property; H-Cement shows the same sulphate resistance with sulphate-resistant Portland cement with C3A = 0; H-Cement is a suitable binder for use in concrete containing the swelling steel slag aggregate as a full replacement of natural aggregate. This low-energy, low-cost and environmentally friendly hybrid cement belongs to the group of advanced cements, in which parameters predetermine it to overcome PC serviceability in certain applications. The objective of this chapter is to characterize fundamental properties and some durability aspects of H-Cement in concrete.

Part of the book: Compressive Strength of Concrete

By Pavel Martauz and Vojtěch Václavík

This chapter presents experimental and industrial experience with the use of steel slag and air-cooled blast furnace slag in the production of concrete as a new sustainable and environmentally friendly building material. Steel slag and air-cooled blast furnace slag replace 100% of the natural aggregate fractions 0/32 mm. The strength characteristics of the sustainable concrete placed in laboratory and outdoor environments and its pictorial analysis are presented.

Part of the book: New Advances in Steel Engineering [Working title]