Article Per Year (5 Year)
p-Index From 2021 - 2026
0.778
P-Index
This Author published in this journals
All Journal Industrial and Domestic Waste Management Civil and Sustainable Urban Engineering
Tam, Nicholas
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Durability Performance of Geopolymer Concrete of Various Strength Meechang, Clarence Meripa; Muthuramalingam, Jayakumar; Tam, Nicholas
Civil and Sustainable Urban Engineering Volume 3 - Issue 1 - 2023
Publisher : Tecno Scientifica Publishing & Society of Tropical Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/csue.v3i1.171

Abstract

Geopolymers, primarily composed of fly ash, have proved an excellent substitute for ordinary portland cement (OPC) in terms of sustainability and productivity. In order to determine the geopolymer concrete's (GPC) resistance to chemical assaults and water permeability, it is necessary to obtain geopolymer concrete (GPC) of varying strengths after normal curing. The objectives of the research was to test the durability performances of the GPC of various strength under normal curing and investigating the optimum strength based on durability testing of the GPC. For this research, different type of cement-to-fly ash ratio was used for various strength data. The appropriate mixture was conducted by using the trial mix method in order to obtain better accuracy of the results data during the mixing design process. To satisfy the varied strength designs, a small proportion of OPC is added to the GPC mixture as part of the mix design. After 28 days of curing, this durability testing is undertaken after the concrete has reached its maximum strength. The compressive strength test and weights were performed and compared to the GPC mix design at 60 °C after heat curing. The 8% OPC replacement has greater resistance to sulfate attack, saltwater exposure, and water permeability compared to the 6% and 7% OPC alternatives. Consequently, the experiment reveals that the GPC's durability and strength increase as the percentage of OPC increases.
Bitumen Stabilised Open Graded Base Materials Nelson, Cheah; Muthuramalingam, Jayakumar; Elhassan, Saad Hamad; Tam, Nicholas
Civil and Sustainable Urban Engineering Volume 3 - Issue 1 - 2023
Publisher : Tecno Scientifica Publishing & Society of Tropical Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/csue.v3i1.198

Abstract

Roads play a crucial role in fostering economic growth and providing social advantages in every nation. However, over time, road infrastructure can become outdated. According to studies conducted by World Highways, a road may seem to be in good condition on the surface while hiding a severe issue beneath. As a result, periodic maintenance, repairs, or modernization may be necessary for road structures. The primary purpose of this project was to investigate the effects of permeability on road base materials by removing particles and restoring strength through stabilization with bitumen. Optimum grade 60/70 bitumen was used in compliance with Malaysia JKR specifications to create a realistic case scenario. The formulation excluded open-graded road base material with particles smaller than 1.18 mm or 2.0 mm, and bitumen stabilization levels of 0%, 2%, 2.5%, and 3% were implemented to reduce the decrease in mechanical strength. The mechanical strength was determined using the California Bearing Ratio (CBR) test, while a Constant Head Method Permeability test was conducted to identify the optimal design mix with the maximum achievable permeability coefficient. The results showed that bitumen stabilization increased the mechanical strength of the road base material, with the highest result compensating for the drop by 8.7%. With open-graded road base material, the permeability can be increased by up to 17.2%. Therefore, open-graded road foundation material with bitumen as a binder for stabilization can be used in the construction of pavements in Malaysia, an area with relatively high rainfall intensity.
Evaluating the Impact of Government Policies on Circular Economy Adoption in the Construction Sector Hoareau, Carol Emilly; Tam, Nicholas
Civil and Sustainable Urban Engineering Volume 4 - Issue 2 - 2024
Publisher : Tecno Scientifica Publishing & Society of Tropical Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/csue.v4i2.481

Abstract

The construction sector is both essential for global economic progress and one of the largest contributors to pollution, resource depletion, and energy consumption. Given the urgent need to adopt more sustainable practices, governments in developed countries have introduced policies aimed at fostering a circular economy in this sector. These policies emphasize the use of green materials to reduce resource consumption, energy use, and greenhouse gas emissions, aligning with global sustainability goals. The waste hierarchy further governs these policies, prioritizing waste reduction, reuse, and recycling. This study analyzes the effectiveness of these government policies in promoting circular economy principles, particularly the adoption of green materials in the construction industry. Our findings reveal that while these policies have led to measurable reductions in energy consumption and emissions, the extent of green material adoption varies significantly across countries. Key factors influencing this variation include economic incentives, regulatory enforcement, and the level of industry acceptance of green technologies. One of the most important results of this study is the identification of significant gaps between policy intent and actual industry practices. In many cases, green materials, despite their favorable characteristics, have not been widely implemented due to economic, technical, and market barriers. These findings underscore the need for stronger government incentives and more consistent policy enforcement to drive broader adoption of sustainable practices. Future studies should focus on overcoming these barriers, exploring the long-term economic impacts of green material adoption, and evaluating how policy frameworks can be optimized to ensure more widespread.
Environmental Management and Construction Waste Strategies in Malaysia: An Overview of Green Materials and Waste Management Challenge Lie, Michael; Tam, Nicholas; Talukdar, Gaurav
Industrial and Domestic Waste Management Volume 4 - Issue 2 - 2024
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/idwm.v4i2.498

Abstract

This review provides an overview of Malaysia's environmental management practices, with a focus on construction waste management, to address the country's growing waste generation in the construction sector. The paper highlights key challenges Malaysia faces in implementing effective environmental practices and offers potential solutions to overcome these hurdles. Additionally, it examines the use of green materials, such as recycled concrete aggregate and bamboo, which have demonstrated significant potential in reducing resource consumption and carbon emissions. The challenges of adopting these materials are analyzed, along with a discussion of their advantages and limitations. Ultimately, the review underscores the importance of environmental management and the role of sustainable materials in transforming Malaysia’s construction industry, while calling for stronger regulatory frameworks and industry collaboration to address these challenges. The objective of this review is to provide insights into the current environmental management efforts in Malaysia and to explore the potential of green materials in mitigating environmental impacts.
Co-Authors Elhassan, Saad Hamad Hoareau, Carol Emilly Lie, Michael Meechang, Clarence Meripa Muthuramalingam, Jayakumar Nelson, Cheah Talukdar, Gaurav