Calcareous fly ash as a main constituent of common cements
Journal Title: Roads and Bridges - Drogi i Mosty - Year 2013, Vol 12, Issue 1
Abstract
The results of tests concerning properties of cements containing calcareous fly ash obtained by a process of lignite combustion are presented in the paper. The scope of the study includes: Portland fly-ash cements CEM II/A,B-W; Portland composite cements CEM II/B-M containing a mixture of calcareous fly ash (W) and granulated blast furnace slag (S), siliceous fly ash (V) or limestone (LL), as well as pozzolanic cements CEM IV/B-W and CEM IV/A,B (V-W). Standard properties of cements, including cement water demand, mortars consistency and mechanical properties, are described in the paper. The obtained results have proven that use of calcareous fly ash in the production of common cements, especially Portland composite cement CEM II/B-M, is possible. Cements containing calcareous fly ash, regarding setting time, soundness and compressive strength, exhibit similar properties to the ones of cements with additives (CEM II – CEM V), available on the market for a long time. The use of calcareous fly ash in greater amount in cement composition (above 20%) results in the increased water demand and deterioration of mortars rheological properties. The process of intergrinding of fly ash with clinker in cement production results in decreased negative impact on cement water demand.
Authors and Affiliations
Damian Dziuk, Zbigniew Giergiczny, Albin Garbacik
Keywords
Related Articles
- EP ID EP69457
- DOI 10.7409/rabdim.013.005
- Views 125
- Downloads 0
Properties of steel in railway bridge constructed in 1887
A number of 19th century steel railroad bridges are still in operation. Mechanical and metallurgical properties of steel in such bridges, and also its durability, have not been sufficiently studied, and these can vary co...
Analysis of lateral movement of railway track due to the passage of trains
In the paper the results of vibration measurements on the base of the railroad in tunnels and classical track are presented. Measurements were performed at straight and curved sections of the track. The influence of the...
Symulacja hałasu pojazdów w trakcie manewrowania z małymi prędkościami – model CP2009
Hałas związany z ruchem drogowym należy do największych problemów ekologicznych powodowanych przez transport kołowy. Ocenia się, że ponad 20% populacji w krajach europejskich narażone jest na hałas przekraczający granicę...
Wiadukt żelbetowy z początków XX wieku – analiza mikrostruktury stuletniego betonu
W artykule opisano historię wiaduktu Kolei Kaliskiej, a także stan zachowania konstrukcji. Omówiono aktualny stan jakości betonu z wiaduktu sklepionego parabolicznego Drogi Żelaznej Warszawsko-Kaliskiej – najprawdopodobn...
Verification of the method of estimating bending moments in soil-shell structures on the basis of shell deformation
The paper concerns soil-shell bridge structures of arch cross-section made from corrugated plates. During backfilling the shell crown is deflected upwards and the sides move inwards at the shoulder (haunch) level. The me...