In 1972, the first conference in sustainable development was held at Stockholm, Sweden. Since then, several countries all over the world have put a great emphasis on this issue and have accepted it as the major concern in a mainstream. A number of conferences and summits have been organized in order to ensure that the world has met the requirement of sustainable contents. Many countries have signed an agreement to accept the agenda in processing the implementation of sustainable development concept across all industries, especially in construction industry. Consequently, “sustainable construction” is the term commonly used in representing sustainability in construction industry.
In term of sustainable construction, material waste is one of key issues (DIT, 2000). The waste has a directly crucial impact on environment. The obvious effect of which which can be easily observed is the rapid achievement of landfill site. A number of studies tried to find out the causes of the construction material waste and the approaches to minimize the waste. Since the waste minimization and management are the important issues toward the sustainable construction, Mr. Pakawat Pormmoon made a case study concerning the systematic formulation of framework through 4Rs (reduce, reuse, recycling, and residual management) waste management strategy for managing the construction material waste on sites. This framework is hoped to enable the construction companies to deal with the construction material waste.
Mr. Pormmoon’s research objective is to develop the 4Rs framework implementation for the construction industry. In order to achieve this main objective, the three
key objectives were also set to (1) investigate the existing activities relating to the concept of reduce, reuse, recycle, and residual management in Thai building construction industry; (2) test the validation of collected 4Rs-relevant activities; (3) develop the framework implementation following to 4Rs concept.
The result of his case study based from the interview revealed that ten general issues can be implemented through 4R’s concept. These issues include (1) environmental policy; (2) nearly Just-in-time delivery; (3) waste management plan; (4) use of long-life construction material; (5) standardization of design; (6) design and build scheme; (7) project quality plan; (8) off-site prefabrication; (9) supply chain alliances with suppliers and recycling companies; and (10)“Take-back” scheme.
However, upon detailed implementation of each “R” in 4Rs, many activities have been arisen. These activities were categorized as (a) improvement of material ordering and supplying; (b) changes of material selection; (c) improvement of site material management; (d) increase of work controlling; (e) defining of alternative options for reuse and recycle; (f) provision of sorting methods and container, area, or infrastructure for collection of by-product; and (g) setting of policies according to the relevance law and regulation; Residual Collection and Residual Disposal
Another finding of his study validated that 4Rs have many relevant activities such as:
1) General Issues
a. To set up environmental policy in order to contribute the implementation of 4Rs (reduce, reuse, recycle, and residual management) principle in practices
b. To apply ‘nearly Just-in-time’ delivery principle in order to reduce and alleviate the congestion of material movement on site
c. To encourage the use of Design and Build scheme to deliver project in order to utilize use of value engineering concept
d. To enhance the use of standardization of design in term of modular system to improve buildability and reduce the quantity of off-cuts on site
e. To increase the use of off-site prefabrication to control loss, waste, and damage, thus, the off-cut can be reduced
f. To enhance the use of long-life construction materials such as steel, standard wood, and others to construct building components; therefore those structures can longer be used
g. To develop Project Quality Plan for managing construction materials on site
h. To develop Waste Management Plan for managing waste on site
2) Reduce at management level
a. Improvement of material ordering and supplying
b. Changes of material selection
c. Improvement of site material management
d. Increase of work controlling
3) Reduce at operational level
4) Reuse and recycle at management level
a. Defining of alternative options for reuse and recycle
b. Provision of sorting and collecting methods, container, area, or infrastructure for collection of by-product
5) Reuse and recycle at operational level
6) Residual management at management level - Setting of policies according to the relevance law and regulation
7) Residual management at operational level
His study’s last finding is that application of each 4Rs-relevant on sites and its implementation can be done at both site management and operational level as implemented by Bovis Lend Lease (Thailand) Limited. It yields a better work execution than other companies at site management level.
His thesis abstract is copied and posted.
ABSTRACT
The problems regarding to sustainable construction are that the most of construction materials are considered to be low efficiently used. The less efficient use of construction materials will not be a problem if the natural resources are limitless, but in fact it is not. In addition, the construction firms need to be reminded that waste make financial cost both direct cost and indirect cost are significant. Many researches have tried to apply the 3Rs (Reduce, reuse, and recycle) waste strategy for managing waste on construction sites. Consequently, this study has tried to apply the concept of 4Rs, reduce, reuse, recycle, residual management concept in Thai building construction industry. To apply 4Rs, reduce, reuse, recycle, residual management concept in Thai construction industry is the main purpose of this thesis.
In order to correlate the main and the sub-objectives of this study, research methodology has been split into three main steps. The first step is to investigate existing 4Rs-relevant activities. The result is that the related activities following 4Rs concept. These activities would be utilized in the next step, gathering the significance and applicability of collected 4Rs-relevant activities. The second step, some activities have been removed. There are six experts utilized in the second step. The last step is to measure the application of each 4Rs activity on sites at both management and operational level. The data in last step were
collected from both Bovis Lend Lease (Thailand) Limited and other companies within Thai building construction industry.
The results were found that validated eight general issues can be implemented through the 4R’s concept. Moreover, there are eight groups of work which 4Rs concepts can be implemented through that are improvement of material ordering and supplying, changes of material selection, improvement of site material management, increase of work controlling, defining of alternative options for reuse and recycle, provision of sorting methods and container, area, or infrastructure for collection of by-product, and setting of policies according to the relevance law and regulation.
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