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This article reviews the physical, chemical and microstructural properties of palm oil clinker (POC) and oil palm shell (OPS) by-products of palm oil. They are considerably used as lightweight aggregate to produce lightweight concrete so as to conserve the virgin resources and to reduce environmental contamination, whereby sustainability will be achieved. This paper is devoted to explaining the compressive...
Synthetic plastics are typically discarded, thus causing environmental pollution. Plastic wastes are recycled as fiber in concrete to solve this problem. In this study, synthetic fibers in a concrete matrix were investigated through compressive strength, splitting tensile, fracture energy, and flexural beam tests. The results show that an increase in fiber content improves the tensile strength of...
This paper enquires the utilization of acoustic emission (AE) to identify the nature of damage such as tensile cracks and shear movements at the critical zone within a structure. The AE parameters were involved in this research are Amplitude, Rise Time and Average Frequency. Some experimental works were performed with the scale of the beam (150 × 250 × 1900 mm) and AE data was captured then analyse...
This paper is presented the observation of noise intervention into acoustic emission (AE) signal on reinforced concrete beam based on data recorded in the AEWin software at different pre-set thresholds manually. Two kinds of sources were selected; namely in-plane source and out-plane source. The correlation between threshold levels and number of hits has been observed. It can be concluded that for...
This paper summarized two types of modern Acoustic Emission Analysis (AEA) for damage detection of reinforced concrete (RC) structure beneficially to accelerate analysis part particularly for newly researcher; namely wavelet and b-value analyses. Both methods are based on analysing of acoustic emission (AE) signals. The concept and significant of these methods also have been described in detail to...
This paper is present a review on the evaluation of concrete structure damage by utilizing the moment tensor analysis (MTA) of acoustic emission (AE) source technique. In general moment tensor analysis is concerning the quantitative information on kinematics of cracks according to the AE source. This concept of AE analysis has been developed and mostly applied in reinforced concrete structure. Furthermore,...
This paper is presented an investigation on acoustic wave velocity of reinforced concrete beam in-plane source based on AE waveform analysis. Pencil Lead Fracture (PLF) was used to generate sudden release of stress at selected source location. Three threshold levels were considered for determining wave velocity in RC beam. It can be concluded that the wave velocity was dependent to the threshold levels,...
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