engleski

Diverting local reactive materials from landfill to sustainable construction

In the last decade, due to the increased awareness of climate change and natural resource conservation, the use of blended cements has become the state of the art in current construction practice. Most of the materials on which current blended cements are based are at high risk of availability and price increases. Both researchers and industry stakeholders agree that there is no one-size-fits-all solution that is optimal for all countries and all climates. However, there is general agreement that for sustainable development in the construction industry, it makes the most sense to use the materials that are found in the region where production and construction are taking place. Therefore, there is a strong need to locate locally available reactive materials which can be diverted from landfill to material supply for the construction industry. In an effort to provide the regional construction industry with a range of options, a screening of materials available in the region was conducted as part of several projects funded by national and international scientific organisations. Using advanced techniques, the properties of these materials have been analysed to provide information that can be used for application in the construction industry. The most common materials identified were fly ash, slag, and red mud ; however, with a limited or unsecure future availability. Since the Southeast European region is rich in clay materials, focus of materials’ mapping were clays and limestone. The strategy used was to tailor different materials for different applications, such as low performance/high volume applications and high performance/low volume applications. Some of the specific topics this work will cover are using low kaolin clay and limestone for developing general purpose concrete, using low and high kaolin clay for high-performance concrete and using alkali- activation of regional materials for development of chloride resistant materials.

blended cement, alkali-activated materials, clay, limestone, red mud, durability

nije evidentirano