A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Partial Replacement of Cement by Metakaolin on Engineering Properties of Concrete
The construction of different infrastructures like buildings, bridges, roadways, and railways is increasing from time to time in the construction industry. To fulfill this construction demand, a large amount of concrete is required. Concrete is a mixture of cement, sand, coarse aggregate, water, and different additives. In this study, the potential of metakaolin as a partial replacement for cement in concrete was investigated. A C-25 concrete with 0%, 10%, 20%, and 30% replacement levels of metakaolin by weight of cement with 0.49% water-to-cement ratio was employed. The study investigates the fresh (workability) and hardened property (compressive strength), durability (water absorption, density, and sulfate attack), property of concrete, and the chemical composition of metakaolin. The result shows that chemical composition of metakaolin contains SiO2, AlO3, and FeO3 which are major compounds and the ash was classified as class N pozzolan since the sum of SiO2, AlO3, and FeO3 is 93.9%. The normal consistency of the cement paste containing metakaolin is within the permissible limit except for the 30% replacement rate. The setting time of concrete increases with an increase in the share of metakaolin content. The use of metakaolin up to 20% does not affect the workability of the mix. Concrete containing 10% of metakaolin replacement enhanced the compressive strength and the sulfate resistance of concrete, whereas the bulk density of the hardened concrete was reduced when compared to the conventional concrete.
Effect of Partial Replacement of Cement by Metakaolin on Engineering Properties of Concrete
The construction of different infrastructures like buildings, bridges, roadways, and railways is increasing from time to time in the construction industry. To fulfill this construction demand, a large amount of concrete is required. Concrete is a mixture of cement, sand, coarse aggregate, water, and different additives. In this study, the potential of metakaolin as a partial replacement for cement in concrete was investigated. A C-25 concrete with 0%, 10%, 20%, and 30% replacement levels of metakaolin by weight of cement with 0.49% water-to-cement ratio was employed. The study investigates the fresh (workability) and hardened property (compressive strength), durability (water absorption, density, and sulfate attack), property of concrete, and the chemical composition of metakaolin. The result shows that chemical composition of metakaolin contains SiO2, AlO3, and FeO3 which are major compounds and the ash was classified as class N pozzolan since the sum of SiO2, AlO3, and FeO3 is 93.9%. The normal consistency of the cement paste containing metakaolin is within the permissible limit except for the 30% replacement rate. The setting time of concrete increases with an increase in the share of metakaolin content. The use of metakaolin up to 20% does not affect the workability of the mix. Concrete containing 10% of metakaolin replacement enhanced the compressive strength and the sulfate resistance of concrete, whereas the bulk density of the hardened concrete was reduced when compared to the conventional concrete.
Effect of Partial Replacement of Cement by Metakaolin on Engineering Properties of Concrete
Green Energy,Technology
Woldegiorgis, Bereket Haile (editor) / Mequanint, Kibret (editor) / Getie, Muluken Zegeye (editor) / Mulat, Eshetu Getahun (editor) / Alemayehu Assegie, Addisu (editor) / Yehualaw, Mitiku Damtie (author) / Fentie, Meseret Asrade (author) / Yifru, Begashaw Worku (author)
2023-07-08
13 pages
Article/Chapter (Book)
Electronic Resource
English
| Taylor & Francis Verlag | 2021