Influence of partial substitution of cement by olive pomace ash on the physico-mechanical characteristics of self-compacting concrete

Abstract

The global production of olives in 2019 reached 3.2 million tons, and the production of the Mediterranean countries reached 90% of the world production, the countries of Palestine and Algeria, as they are among the countries of the Mediterranean basin, where olive cultivation is witnessing a great activity, but the common problem is the large quantities of olive waste Produced by olive oil mills. The main objective of this study is to value olive residues by using them in non-structural elements by replacing peat powder with cement in the self-stressed concrete mixture. This study is based on several experiments and tests in order to study the effect of replacing peat powder with cement on the concrete mixture in the long run, and accordingly the test was mainly based on and comparison between the results of replacing peat powder at rates of 5%, 10% and then 20% in the concrete mixture . In the end, the results obtained from this study indicate that the higher the percentage of peat replacement in the self-compressing concrete mixture, this leads to a long-term weakness in the compressive and tensile strength of concrete, but as mentioned earlier, this mixture is basically not designed For the basic structural elements, and considering that peat is extracted from an organic material, it also does not conflict and does not negatively affect the constituent elements of the cement used, and therefore the effect of peat on the mechanical and physical properties of the concrete mixture is not noticeable.