Characteristic of compressive strength towards microwave absorber for lightweight palm oil fuel ash cement brick

The implementation of pozzolanic material in concrete construction is broadening, one of the latest addition to this Palm Oil Fuel Ash (POFA). This POFA which contains siliceous composition produces a stable and denser breeze block. The consummation of POFA in concrete will lessen the cost of concrete production and could lower the negative environmental effect. For this research, the effectiveness of POFA as a partial cement replacement in high-performance concrete in term of strength and absorption were investigated. In the beginning, concrete containing POFA as cement replacement of 10%, 20% and 30% had subordinate strength development than control concretes while at a later age of 28 days[l]. The POFA were replaced with a ratio of 10%, 20% and 30%. In this study the 20% of POFA will be used as a cement replacement then the specimen was cured using water for 7, 14 and 28 days[2]. The POFA gave a good compressive strength increasing within the time curing and concrete with 20% replacement of ground POFA had the highest strength[3]. While the characteristic of POFA cement can be proper simulate, modelling and analyses by using Computer Simulation Technology (CST). Then the strength of the brick will be tested using the automatic compression machine. The preeminent parameter such as reflection loss, dielectric properties and absorption performance will be observed in this project. The absorber will be measured by using X-band frequency range 8-12GHz. Absorber will characterize their electric permittivity and magnetic permeability and absorber are used in advance application especially to terminate stray or undesired radiation that could disturb in a system operation. To imply the application of absorber, the material that has been choosing must have the most amount of permittivity and the permittivity comes from the dielectric of pozzolan material. Pozzolan material is known as a natural rock or volcanic origin that contain silica (Si) and aluminum oxide (Al20 3)[4].