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Assoc. Prof. Mei-yung Leung

Department of Architecture and Civil Engineering, City University of Hong Kong

Title: Value Management for Complex Projects along the Belt and Road Regions

Abstract: Every construction project involves multi-stakeholders who value different things form different engineering management aspects. In mega projects, like those under the Belt and Road Initiative, stakeholders are more diversified, more complicated and mixed, which cause great challenges to project management. Traditional problem-solving and management processes generally fail to facilitate consensus amongst different stakeholders, not to mention about enhancing quality and creating values for a project. Hence, value management (VM), as a logical team decision making, plays an essential role for mega projects along the Belt and Road regions. VM developed in the United States in 1947 has been widely adopted in various developed countries including North America, Japan, Europe, Australia, and other countries. It emphasizes a systematic team decision making process amongst multi-disciplinary members for effectively and innovatively resolving difficulties, particularly at strategic levels. It can be used in parallel to, or sometimes integrated with, different management strategies including partnering, risk management and public engagement. Amongst the various districts especially the Belt and Road cities, Hong Kong is one which has had advanced and matured VM adoption. In this presentation, critical factors applying VM in the complex projects along Belt and Road regions will be shared and analyzed.

Prof. Ahmad Safuan Bin A. Rashid

School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia

Title: Engineering Characteristic and Chemical Properties of Bottom Ash Waste Material

Coal-fired power plants produce two types of waste which are fly ash and bottom ash. Cement industries use a large amount of fly ash for cement replacement. However, the usage of bottom ash is still very minimal in Malaysia. Several types of research have been conducted on the applications of bottom ash in engineering fields which includes ground treatment, backfill materials, sand replacement and aggregate replacement in concrete. The engineering properties exhibited by bottom ash in terms of free-draining, granular, lightweight and interlocking nanostructures allow them to be used in different functions. The application of bottom ash not limited to their raw state, but also can be mixed and modified without neglecting their impacts on the environment. Basic physical testing includes specific gravity, particle size distribution, permeability test and direct shear test. Whereas, in term of morphological studies includes Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDX) and X-ray Fluorescence (XRF). In order to study the impact of bottom ash on environmental, Toxicity characteristic leaching procedure (TCLP) conducted using ICP-OES. From the TCLP test, heavy metal traces that can leach to the environment can be measured and compared with the standard provided by the authority. The results show that the properties of bottom ash have similarities to those of sand thus there is a potential to be used as sand replacement materials in construction and engineering works. In term of chemical analysis, it is found that bottom ash does contain heavy metal traces. However, the amount of heavy metals presence is below the maximum threshold from the standard guideline from the authority. Thus, the usage of bottom ash in industries does not cause any harm to the environment. This will help in promoting the solution and recycling of wastage from coal-fired power plants.