Harn Wei Kua
Email Address
bdgkuahw@nus.edu.sg
Organizational Units
COLLEGE OF DESIGN & ENG
faculty
BUILDING
dept
104 results
Publication Search Results
Now showing 1 - 10 of 104
Publication Combination of polypropylene fibre and superabsorbent polymer to improve physical properties of cement mortar(2017) Gupta S.; Kua H.W.; Pang S. D; BUILDINGPublication Panel and plate properties of Cross-laminated timber (CLT) with tropical fast-growing timber species in compliance with Eurocode 5(ELSEVIER SCI LTD, 2020-11-20) Corpataux, Laurent; Okuda, Shinya; Kua, Harn Wei; Assoc Prof Shinya Okuda; ARCHITECTURE; BUILDINGCross-laminated timber (CLT) is widely regarded as an effective building material that increases productivity during construction and effectively stores carbon dioxide. Southeast Asia is home to some of the fastest-growing timber species worldwide. The feasibility of using fast-growing, tropical timber species for CLT is explored in this study. The timber species red jabon (A. macrophyllus – 9 years old), sengon (F. moluccana – 5 years old) and acacia hybrid (A. mangium × A. auriculiformis – 5 years old) were sourced from Indonesia, and the timber species Norway spruce (P. abies) was sourced from Latvia. 1C-PUR adhesive was used for the bonding and the CLT panels were produced and tested according to EN 16351:2015. It was found that F. moluccana panels exhibit a significantly lower bending stiffness than P. abies panels. However, it is found that if F. moluccana is used as the inner layer in combination with A. mangium × as the outer layer, the panels exceed the values of P. abies. Moreover, A. macrophyllus shows great potential to achieve CL24 strength class. If A. macrophyllus is combined with A. mangium × in the outer layers, higher strength classes than CL24 can be achieved. These results suggest that the fast-growing timber species used in this study have the potential to be successfully used for CLT and to ultimately supplement imported European P. abies CLT in Southeast Asia's construction.Publication Attributional and consequential life cycle inventory assessment of recycling copper slag as building material in Singapore(2013-06) Kua, H.-W.; BUILDINGThis work is an attributional and consequential life cycle inventory assessment on the use of copper slag as a replacement for ordinary Portland cement. Assessments were done with respect to the emissions of seven kinds of heavy metals and four types of gaseous emissions. It was found that replacing cement with copper slag will reduce the emissions of cobalt, carbon dioxide, carbon monoxide and nitrogen oxides. However, it will increase the emissions of cadmium to the environment. This substitution may also reduce the emissions of arsenic, chromium, copper, lead, mercury and sulphur dioxide. In addition, three scenarios of likely consequences of this substitution were considered. It was found that these consequences will reduce the life cycle benefits of such a material substitution. Finally, four policy-making lessons were delineated. © The Author(s) 2012.Publication An Environmental Management System in a Manufacturing Plant in Singapore: Challenges and Solutions(Pearson Prentice-Hall, 2011) Cheng, Y. S.; Kua, H. W.; BUILDINGPublication Sustainability Matters: Asia's Energy Concerns, Green Policies and Environmental Advocacy(World Scientific Publishing Co., 2014) Editor, Lye, I. L. H.; Editor, Savage, V. R.; Editor, Chou, L. M.; Editor, Yu, L. E.; Editor, Kua, H. W.; CIVIL AND ENVIRONMENTAL ENGINEERING; TROPICAL MARINE SCIENCE INSTITUTE; OFFICE OF ALUMNI RELATIONS; BUILDING; LAWPublication Small Islands' Approach To Climate Change Mitigation And Adaptation - The Cases Of Mauritius And Singapore(2010) Lutchmeeduth, B. H.; Kua, H. W.; Gunawansa, A.; Piana, A.; BUILDINGPublication Promoting household energy conservation in low-income households through tailored interventions in Grahamstown, South Africa(2016) Thondhlana G.; Kua H.W.; BUILDINGPublication A review of some key climate change legislations and policies: lessons for Singapore's construction industry(2010) Gunawansa, A.; Kua, H.W.; BUILDINGThere is overwhelming scientific consensus that the climate is changing due to primarily human-induced activities. Emission of greenhouse gases from the energy and construction sectors is one of the main human induced causes. Most legislative and policy initiatives by countries to deal with climate change will have a significant impact on the energy and construction sectors. In proposing the appropriate sustainability lessons for Singapore's construction industry, this paper briefly examines the international framework for dealing with climate change and the key legislative and policy initiatives in the USA and Australia, two of the largest GHG emitters in the world. This paper argues that the relevant mechanism introduced in all three countries is insufficient to deal with the impacts of climate change, as their main focus is on mitigation. The most rigorous mitigation efforts currently might not be able to prevent climate changes in the near future; hence, adaptation to climate change should become an integral part of the planning process, especially in the construction sector. Copyright © 2010 Inderscience Enterprises Ltd.Publication Beyond Gold: Improving the Clean Development Mechanism and Gold Standard with Sustainability-rating(2008) Kua, H. W.; BUILDINGPublication Use of biochar-coated polypropylene fibers for carbon sequestration and physical improvement of mortar(Elsevier Ltd, 2017) Gupta S.; Kua H.W.; Tan Cynthia S.Y.; BUILDING