Úprava ocelárenské strusky pro využití ve stavebnictví.

Abstract

Nowadays, due to the large production of industrial waste, it is necessary to protect the environment and also to use all types of waste produced correctly. The recovery and recycling of waste saves basic raw materials and energy resources and, of course, also delays the depletion of natural resources and contributes to environmental protection. One of the largest shares in secondary raw materials is large-scale waste, where we classify waste from the mining industry. In most cases, these were always fly ash, coal mining waste and metallurgical waste. Steel slag is one of these by-products. This dissertation thesis is focused on the possible utilization of one large-volume waste, which is converter steel slag. It is a treatment of steel slag for use in the construction industry, its partial or complete replacement of natural aggregate in concrete mixture.

The theoretical part is focused mainly on the characteristics of the materials used, their treatment, properties, distribution and use. Subsequently, the work gives an overview of the current state of knowledge for the use of waste materials, especially steel slag.

The experimental part presents the results of the research. It is divided into 2 main parts. The first part is devoted to the design of recipes and preparation of cement composites based on steel slag fr. 0/8 mm, which were subsequently tested physical-mechanical properties but also volume changes under thermal load at 200 ° C, 400 ° C, 600 °C,800°C.

The second part presents the results of the research, which dealt with the use of modified steel slag as a possible substitute of binder (admixture) in the amount of 10, 20 and 30% of its weight in the production of cement composites.