Abd Bakil Siti Natrah Binti

Development of geopolymer from secondary raw materials

Miskolci Egyetem

Mikoviny Sámuel Földtudományi Doktori Iskola

Mucsi Gábor

Kristály Ferenc

társ

PhD

Geopolymers are amorphous alumino silicates which can be produced by the reaction between silica and alumino silicate in alkaline medium (NaOH and/or KOH) at ambient or elevated (30-100 °C) temperature. Due to its simple, energy efficient and eco-friendly production method, good durability and good mechanical properties geopolymers can replace conventional materials from low tech application (building industry, waste immobilisation) to high tech industry (ceramics with special properties, composites). Every material is suitable for geopolymer production which contains silica and alumina bearing phases, like primary (metakaolin) or secondary (power plant fly ash, mining gangue, steel slag, red mud, etc) raw materials. However, low reactivity of secondary materials results in slow binding and early strength development. In order to improve their reactivity mechanical activation by grinding is an efficient tool. The activation of these raw materials can be realized by grinding in mills which influence the properties of applied minerals. The research will focus on the control of geopolymer properties (strength, porosity, density, thermal conductivity, …) by various grinding as well as heat treatment techniques and parameters and by mixing fibre structure waste materials in order to develop new technology and geopolymer product (green cement) with enhanced properties.

2021-09-01

2025-07-07

abszolutóriumot szerzett

Development of geopolymer from secondary raw materials