engleski

Influence of Cement Type and Mineral Additions, Silica Fume and Metakaolin, on the Properties of Fresh and Hardened Self-Compacting Concrete

Mix proportioning of self-compacting concrete is a challenging task because the concrete mixture has to be stable and has to have ability to fill formwork and to bypass obstacles under the influence of its own weight. Besides that, the final product has to be quality hardened concrete. It is known that even a little alteration of any component can significantly change characteristics of fresh and hardened concrete. In this work it is experimentally examined influence of type of the cement and additions, namely: silica fume and metakaolin, on the workability and compressive strength of self- compacting concrete. For this purpose, several mixtures of self-compacting concrete were prepared and tested. Properties of fresh mixture were determined by slump flow method, visual assessment of stability, T50 time, V-funnel method, L-box method and J-ring method. Also, in hardened state, compressive strengths after 7 and after 28 days were determined. Results obtained in this work were compared with the results of other authors.

cement type ; silica fume ; metakaolin ; workability ; stability ; compressive strength of concrete

nije evidentirano