Waste Management

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The directors of a property company are looking at whether they shouldconstruct a new office building. The economy is doing well, and the amount ofvacant office space is reducing sharply. As part of their decision they decide to use the 6 Thinking Hats te

luonut Serik Ayazhan

Waste Management

3.Results and discussion

Impediments to prefabrication

5 significant barriers

5)conflict with construction practice

4)lack of on-site cast yard area

3)lack of incentives

2)conflict with traditional design process

1)need for specification change

Comparision between conventional and precast construction

The advantages of traditional construction over precasting one are as follows: 1)maximize returns, 2)reduce the overall project cost, and 3)reduction of waste

The most important benefits when using precasting compared with traditional construction are: 1)waste reduction 2)improved quality control

Waste reduction level in prefabricated buildings

suggesting that the use of prefabrication and system framework were not the only means of reducing construction waste

implementation of trip ticket system

adoption of waste management plan

discussing the factors affecting the effectiveness of waste reduction level, including 1)prefabrication is a relatively new construction method to private sector in HK construction industry 2)waste generation quantities significantly varied from project to project

Construction waste generation on building sites and waste reduction methods

analysing the results of the survey: waste generation in constructional industry are probably related to the 1)construction method selection, 2)the availability of on-site sorting and 3)recycling facilities for construction waste, and 4)the level of education and training of the workers

4.Conclusion

but, on the other hand, further ivestigations should be carried out to examine its limitation

1 reason

Wastage reduction levels are generally higher in projects from the public sector

a wider application of prefabrication techniques in building construction in HK is beneficial

2 reasons

Waste reduction could be one of the main benefits when using precasting methods compared with conventonal construction

Prefabrication is a possible solution to major causes of waste arising during both the design and construction stages

2.Methodology

showing and explaining the methods used in data collection

investigation over recent

interviews with professionals

questionnaire survey

1.Introduction

Waste reduction and prefabrication

explaining the idea of prefabrication and ways to achieve waste reduction

reduce timberwork: a major contributor to construction waste

Prefabrication: a manufacturing process, generally taking place at a specialised facility where various materials are joined to form a component of the final installation

The construction industry in HK

focusing on the problems brought by the industry that produces the greatest amount of waste---construction industry

it creates environmental nuisances such as noise, dust, muddy run-offs, and a great amount of waste

CIRC report provides 109 recommendation for it

being described as"labour intensive, dangerous and polluting"

Government achievement

pointing out the strategies that the government use and their effectiveness

trip ticket system

polluter pays principle

waste management plans

Construction waste management in HK

introducing the waste management methods adopted in HK now

lack reduction measures

mainly use public landfill area

identifying different kinds of waste

non-insert waste

construction waste

sustainable construction and waste reduction

defining concepts like waste minimisation and sustainable construction

Waste minimisation: a process which avoids, eliminates or reduces waste at its source or permits reuse/recycling of the waste for benign purposes

sustainable construction: the creation and responsible management of a healthy built environment based on resource efficient and ecological principles