| Abstrakt: |
The importance of trying to find a partial or total alternative due to the negative impact of cement on the environment is because it contributes to acid rain. Therefore, material specialists and researchers are competing in the field of finding suitable and abundant materials, including waste, whether industrial or agricultural to make an additional score and disposal. The aim of this study was to evaluate the effect of mango leaf ash (MLA) substitution as a partial replacement for cement type OPC 53 in.the concrete mixture. To achieve the goal, laboratory tests were done to check the efficiency of adding ash to cement with varying 0%, 2%, 5%, 6%, and 8% by weight of cement. The grade of concrete that was used was M30 and the experiments were compressive strength test at 7, 14, 28 days respectively. Also, the flexural test and splitting tensile tests were conducted at 28 days. In addition, the concrete was tested also in a fresh style to check workability from the slump test. The MLA has adversely affected the strength of concrete; the addition of 2% MLA slightly increased the strength of concrete, positive effects can be seen in the 5% addition of MLA, whereas the negative effect for the remaining doses (6% and 8%) can be clearly seen in both strength and workability. However, it was observed that an addition of 2% to 8% MLA replacement is capable of producing concrete strength of more than 30 MPa for all mixes, and more than 40 MPA for 2 to 6 % replacement. This proves that mango leaf ash is a suitable replacement for cement for producing high compressive strength concrete. [ABSTRACT FROM AUTHOR] |
