- Tytuł:
- Effect of Waste Mineral Additives on Flow Stability Over Timein Self-Compacting Concrete Mixes With Low Clinker Content
- Autorzy:
-
Grabiec, A. M.
Zawal, D.
Kostrzewski, W. - Powiązania:
- https://bibliotekanauki.pl/articles/124828.pdf
- Data publikacji:
- 2015
- Wydawca:
- Polskie Towarzystwo Inżynierii Ekologicznej
- Tematy:
-
self compacting concrete
waste mineral additive
sustainability of civil engineering - Opis:
- Contemporary solutions in concrete technology are varied, and consist in e.g. the use of new generation concretes, including the most spectacular achievement of the 1990s – self-compacting concrete (SCC) being the subject of continuous research, as well as protection of the environment against excessive anthropogenic pressures, such as carbon dioxide which is a major emission substance from the cement industry. The studies analysed the possibilities for replacing part of the clinker binder (cement CEM I 42.5 R) in self-compacting concrete with three types of waste mineral additives: fly ash, limestone powder, and granite powder. Focus was placed on key technological characteristics of concrete mixes: air content and rheological properties, maximal diameter of slump-flow and changes thereof over time, as well as the mix’s flow time into the 500 mm diameter, determining the flow dynamics. 28-day compressive strength of the concrete was recognised as a secondary property which in self-compacting concretes results from achieving the right range of the mix’s rheological properties. Concretes were produced using gravel-sand aggregate in 3-fraction composition and a high-efficiency superplasticiser. The studies were conducted as a planned experiment in the 3-ingredient mixes plan.
- Źródło:
-
Journal of Ecological Engineering; 2015, 16, 4; 206-214
2299-8993 - Pojawia się w:
- Journal of Ecological Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł