Research Output
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PublicationMarshall Stability of Combination of Perlis Limestone and Granite in Hot Mix Asphalt( 2024-06-07)Limestone is used in many countries for road pavement, such as Poland, USA and France. However, there are limitations in terms of mechanical and surface properties, but it has been used in some regions for years, particularly in Perlis, Malaysia, due to the need for a local source. The reason is that of caution of fear, in spite of wanting to explore the opportunities of Perlis limestone being used and understand the advantages and disadvantages of that aggregate. This study focused on the stability, flow, and volumetric by using a combination of Perlis limestone and granite in hot mixed asphalt (HMA) mixtures. The combination of Perlis Limestone and granite was analysed and tested to specification for roadworks by PWD, Malaysia. Furthermore, there will be a cost increment in road construction due to logistic and transportation problems in delivering imported granite aggregate from Kedah state. The result showed that HMA with less Perlis limestone aggregate showed a higher value of stability, flow and stiffness. As for the conclusion, HMA with more granite aggregate has better strength with less deformation compared with HMA with more Perlis limestone aggregate. HMA with more granite aggregate was also was stiffer, mainly due to the interlocking and frictional resistance of the aggregate due to the angularity and rougher surface of granite. However, since all the samples complied with the PWD specification, Perlis limestone proved it can be an alternative aggregate to be used in HMA.
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PublicationThe influence of integrated management system (IMS) on innovation performance in Malaysia construction industry( 2021-07-21)Globally, the construction industry has become a complicated, critical, and exponentially developed leads to increase difficulties and required more innovative and better management system. This leads the organization to find a better solution to their management approach. The international standards in quality, environment, safety, security, supply chain, etc. have been combined to form a comprehensive system called integrated management system (IMS). By implementing a management system standard, organizations can benefit from global management experience and good practice, but the issues arise on the success factors and how they affect the performance of the company. There had been plenty of researches son IMS elsewhere, but this research was focusing on the construction industry in Malaysia in term of innovation performance. The approach is quantitative by disseminating questionnaire to the construction players in the northern region of Peninsular of Malaysia. The IMS's attributes, i.e. integration of IMS and integrated audits, are found to have positive relationship toward the innovation performance of an organization. The model moderately explained 52.8% proven that the attributes should be the focal point of the organization to increase their success factors in boosting their performance, especially in its innovation.
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PublicationSurface resistivity and ultrasonic pulse velocity evaluation of reinforced opc concrete and reinforced geopolymer concrete in marine environment( 2021-01-01)The concrete structures that are built along the seaside often suffer from reduced service life due to inadequate durability against deterioration. This research reports the findings of concrete resistivity and quality using two Non-Destructive Testing (NDT) measures applied to Reinforced Geopolymer and Ordinary Portland Cement (OPC) concrete in the marine environment. In addition, the relationship between Reinforced Geopolymer and Reinforced OPC concrete was statistically discussed in-terms of strength and direction. The testing was carried out using a Proceeq Resipod Wenner 4-probe to measure Surface Resistivity (SR) and Ultrasonic Pulse Velocity (UPV), respectively. The testings were carried out on beam shaped samples of OPC and Geopolymer concrete that were immersed in seawater over a period of 90 days with similar curing condition. It was found from the present investigation that the maximum SR and maximum UPV values acquired for both the Reinforced OPC and Reinforced Geopolymer concrete are 2.73 kΩcm and 2.07 kΩcm, as well as 4.18 km/s and 4.05 km/s, respectively. It is apparent from the study that both concrete is comparable in terms of quality and surface resistivity.
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