| Autor: |
OBAIDI, HADEL, FARHAN, AHLAM ABDUL-RHEEM, AL-SAADI, TAHA H. ABOOD |
| Předmět: |
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| Zdroj: |
Romanian Journal of Materials / Revista Romana de Materiale; 2023, Vol. 53 Issue 1, p23-32, 10p |
| Abstrakt: |
Since concrete is a consistently reliable building material, its importance to all nations' economies cannot be overstated. However, the cement and concrete industries continue to generate massive amounts of waste which results in the emission of carbon dioxide which is one of the environmental issues. Therefore, reducing the amount of cement is important by partially replacing one of the waste materials. In this research; two municipal materials were used as alternatives for cement. It is considered available in quantities with appropriate price as compared to other mineral materials. In addition, this research was interest given to assess the strengths and durable behaviour of concrete production with these addition materials. The amount of metakaolin used is (1-15) wt% and alum (1-5) wt% of cement. The central composite design (CCD) method was used in conjunction with the response surface method to design concrete mixtures for this research and to analyse the results obtained from laboratory tests. An empirical model was given for compressive strength, bulk density and splitting tensile strength. All concrete specimens were cured after 7 and 28 days. The best results were found when metakaolin was used between (1-3) wt% and alum sludge between (1.6-3) wt% as mixed materials to produce concrete and as a partial replacement of cement. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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