GeoDust · Utilization of secondary raw material in geopolymers production

Utilization of secondary raw material in geopolymers production

Portland cement production consumes a lot of energy, natural resources and produces large amounts of greenhouse gases and waste in form of so-called cement kiln bypass dust (CBPD). Therefore, the utilization of CBPD together with other industrial wastes or by-products in the building industry would be more sustainable thanks to the utilization of the wastes as well as thanks to the reduction in the demand for Portland cement. A solution can be alkali-activated materials which have many other advantages such as durability or resistance to elevated temperatures. However, they have also some drawbacks, particularly extensive shrinkage, related cracking tendency and often fast setting time. In addition, before our project started, comprehensive research focused on the utilization of CBPD in alkali-activated materials was not conducted. Objective of GeoDust project was to contribute to the common 2050 goal of reducing global CO2 emmision by 80%. Concrete, the most widely used construction material, whose production has serious environmental impacts due to high energy demands, the consumption of raw materials and greenhouse gasses, needs a search for a greener alternative. We developed cementless concretes based on industrial by-products or even wastes, and thus can save natural resources, energy and reduce emissions of greenhouse gases. Exchange of knowledge and experience between academia and industry (production and R&I) creates a much better understanding of each working environment, which is highly beneficial for mutual cooperation. In our specific case, close cooperation was established between academia and the cement plant and expanded even far beyond the original scope of the project to improve the quality of ordinary cement and concretes and thus improve living standards. The overall objectives of this project were to establish a strong partnership between scientific and industrial institutions across the EU. To monitor the composition of CBPD over time and investigate their role in alkali-activated systems. To develop non-traditional concrete based on industrial by-products and wastes, particularly cement bypass dust (CBPD) and blast furnace slag, and thus contribute to the sustainability of the building industry. Comprehensive testing of alkali-activated concretes. Knowledge sharing, training staff of the involved partners, and thus increae their competitiveness on the national and international level.

Data: CORDIS, © European Union