Construction waste modelling for residential construction projects in New Zealand to enhance design outcomes

2021 ◽  
Vol 120 ◽  
pp. 484-493
Author(s):  
Niluka Domingo ◽  
Tim Batty
2021 ◽  
Author(s):  
◽  
Tanvi Bhagwat

<p>Previous New Zealand waste management studies have focused on the waste generated from construction activities. However, international research suggests about a third of the overall waste generated originates in the design phase. Internationally, lean design management claims to reduce the waste produced by inefficient design practices. In New Zealand, the literature reveals that the application of lean principles is still in a fledgling state, and even where they are used, waste minimization is not a business priority. This leads to the question: can lean design management be used by construction projects in New Zealand to reduce waste in the design phase? This paper investigates the attitudes, experiences and expectations towards construction waste minimization of a selection of architects using a semi-structured questionnaire. It was found that Wellington-based architects can be broadly classified into 3 categories of lean awareness—high, medium, and low. The medium group, largest in number, comprised architects who identified waste as a problem, but cited post-construction recycling and reuse as their preferred approach to waste minimization. This group notably had 20-25 years of experience in the industry, and related material reuse to residential construction only.</p>


2021 ◽  
Author(s):  
◽  
Tanvi Bhagwat

<p>Previous New Zealand waste management studies have focused on the waste generated from construction activities. However, international research suggests about a third of the overall waste generated originates in the design phase. Internationally, lean design management claims to reduce the waste produced by inefficient design practices. In New Zealand, the literature reveals that the application of lean principles is still in a fledgling state, and even where they are used, waste minimization is not a business priority. This leads to the question: can lean design management be used by construction projects in New Zealand to reduce waste in the design phase? This paper investigates the attitudes, experiences and expectations towards construction waste minimization of a selection of architects using a semi-structured questionnaire. It was found that Wellington-based architects can be broadly classified into 3 categories of lean awareness—high, medium, and low. The medium group, largest in number, comprised architects who identified waste as a problem, but cited post-construction recycling and reuse as their preferred approach to waste minimization. This group notably had 20-25 years of experience in the industry, and related material reuse to residential construction only.</p>


Buildings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 214
Author(s):  
Ann T. W. Yu ◽  
Irene Wong ◽  
Zezhou Wu ◽  
Chi-Sun Poon

Hong Kong is a densely populated city with high-rise developments, and as in other metropolitan cities, the amount of waste generated from construction projects in the city is increasing annually. The capacity of existing landfills is expected to be saturated by the 2020s. Construction waste management has been implemented for years but the performance is still not satisfactory. The aim of this research paper is to explore and formulate strategies and measures for effective construction waste management and reduction in highly urbanized cities such as Hong Kong. A desktop study on construction waste management practices was carried out for a preliminary understanding of the current situation in Hong Kong. Semistructured interviews and focus group meetings were further conducted to shed light on how to improve construction waste reduction and management in Hong Kong. The main contributions of this research study are the potential short-term, medium-term, and long-term strategies, which are related to the design stage, tender stage, construction stage, and government support. The five major strategies recommended are financial benefits to stakeholders, public policies in facilitating waste sorting, government supports for the green building industry, development of a mature recycling market, and education and research in construction waste minimization and management.


2010 ◽  
Vol 163-167 ◽  
pp. 4564-4569 ◽  
Author(s):  
Ahmad Firman Masudi ◽  
Che Rosmani Che Hassan ◽  
Noor Zalina Mahmood ◽  
Siti Nazziera Mokhtar ◽  
Nik Meriam Sulaiman

Estimation of construction and demolition (C&D) waste amount is crucial for implementing waste minimization program. Estimation of C&D waste amount generated is a mean in assessing the potential for waste reduction. Thus, a better understanding of C&D waste generation in terms of causes and sources can be achieved. The aim of this paper is to conduct a review on available construction waste quantification methods from previous studies, which have been utilized in certain countries, while attempting to choose the most suitable and applicable method, and to direct future studies for better quantification methods. This review is applicable only for building construction projects and did not include civil/infrastructure, demolition, renovation, and excavation projects. Six quantification methods and/or waste audit tool available from literatures are discussed, which include their limitation and future direction for this study. It is believed that some combination of these quantification methods could make a good impact in accurate numerical estimation of construction waste amount generated in building construction projects. A strong and accurate database as presented by Soliz-Guzman, combined with effective, vital, and resourceful estimation suggested by Jalali’s Global Index (GI), also with the aid of user-friendly software tool like the SMARTAudit could provide an effective and reliable waste quantification.


2021 ◽  
Author(s):  
◽  
H. M. Dunn

<p>This research portfolio looks at how consciously activating prefabrication into the design process early, and subsequently designing to the onsite assembly stage by using three key design principles, can contribute to a responsive design that embodies quality medium density living in New Zealand.  Prefabrication is at the forefront of the New Zealand Government’s conversation about its residential construction industry. The potential attributes of this efficient construction method of fast on-site installation time, reduced cost, improved construction safety, and improved construction quality, have the potential to positively impact the issues that our housing industry faces.  However, the intrinsic limitations that come with prefabrication being based on the ideals of efficiency, carry the risk (as seen throughout its history) of compromising the design quality. With the motivation to integrate this construction process into New Zealand’s commonplace residential construction industry based on its positive attributes, it is essential to address its relationship to the designed outcome, and consequently the design process.  Ryan E. Smith of Washington State University in Prefab Architecture expresses that prefabrication is a construction process not a product so a poor design results from a poor designer. He specifies that for a prefabrication project to achieve quality construction and aesthetics the design process must be directed to “quality assembly”. This idea endorses the integration of this chosen construction process in accordance with the design intent and guide the design through various scales to the detailing of assembly.  For this integration of ‘quality assembly’ into the design process three principles have been interpreted from founding literature as being key drivers: standardisation, repetition, and personalisation. Standardisation is the act of simplifications to efficiently design. Based on chosen factors measurements are controlled allowing pieces, elements, and/or units to relate to one another cleanly. Repetition is the act of reducing variances within the construction, maximising the efficiency of prefabrication. Traditionally this can improve quality. Personalisation is the principle that relates the desirability of the outcome with the necessity appropriately suiting its site and occupancy.  This research is positioned within New Zealand’s residential climate, which is seeing a growing demand for medium density living. The defined programme accommodates two key demographics within this density of first-home buyers and homeowners downsizing. The focus is to design a system that assists quality living – giving an alternative archetype – for New Zealand’s evolving climate.  Key findings from this research support the design intent of ‘designing to assembly’, whereby the construction process and the outcome are integral to one another. By focussing collectively on standardisation, repetition, and personalisation, a responsive design that is suitable to various sites and occupancies can be realised. The challenge lies within balancing flexibility with restriction efficiently.</p>


Author(s):  
Mohd Hilmi Izwan Abd Rahim ◽  
◽  
Sulzakimin Mohamed ◽  
Narimah Kasim ◽  
Mazianah Rahmat ◽  
...  

This nowadays an increasing number of construction projects in Malaysia have contributed to the production of construction waste which has had a negative impact on the environment, especially through illegal dumping. The increasing number of illegal dumping activities is a sign that construction waste management needs to be examined. To date, a comprehensive criterion for construction waste management, in developing countries is still not clearly defined. Therefore, the objectives of this paper are to investigate current illegal dumping activities, and identify the challenges towards reducing illegal dumping activities in the Malaysian construction industry. Hence, this research conducted interviews with 20 expert stakeholders related to construction waste management in order to scrutinise illegal dumping activities in Malaysia. The data from these semi-structured interviews were analysed by content analysis. The findings are used to determine the current challenges for reducing illegal dumping activities in the Malaysian construction industry. The elements in the current findings are potentially to improve construction waste management in order to archive the proper construction waste management. Finally, this findings will help to identify strategies to reduce illegal dumping activities and to enhance challenges towards reducing illegal dumping activities in the Malaysian construction industry.


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