An analysis of factors influencing waste minimisation and use of recycled materials for the construction of residential buildings

Residential building construction activities, whether it is new build, repair or maintenance, consumes a large amount of natural resources. This has a negative impact on the environment in the form depleting natural resources, increasing waste production and pollution. Previous research has identified the benefits of preventing or reducing material waste, mainly in terms of the limited available space for waste disposal, and escalating costs associated with landfills, waste management and disposal and their impact on a  building company's profitability. There has however been little development internationally of innovative waste management strategies aimed at reducing the resource requirement of the construction process. The authors contend that embodied energy is a useful indicator of resource value. Using data provided by a regional high-volume residential builder in the State of Victoria, Australia, this paper identifies the various types of waste that are generated from the construction of a typical standard house. It was found that in this particular case, wasted amounts of materials were less than those found previously by others for cases in capital cities (5-10 per cent), suggesting that waste minimisation strategies are successfully being implemented. Cost and embodied energy savings from using materials with recycled content are potentially more beneficial in terms of embodied energy and resource depletion than waste minimisation strategies.

Estimating demolition costs for single residential buildings

With the increasing stock of aging structures, building
demolition is becoming achallenging research field from
the perspective of management. As the converse of
construction, management of demolition puts forward some
new management themes or adds some new contents
even though the same issues are faced in construction
management. This research aims to develop a quantitative
approach to estimate the costs of a demolition project. A
cost analysis method is presented to systematically break
down the cost components involved in the demolition of
a structure. Due to the lack of robust research in theory
and systematic summary in practice to date, the economic
performances of demolition will be studied through acase
study, and the majority of parameters are derived from
actual experiences in practice. The proposed demolition cost
estimation method is applied to the actual form of building
elimination (Scenario 1), and further comparison is carried
out with two other elimination methods, which are the newly
developed deconstruction (Scenario 2) and mechanical
demolition (Scenario 3). Deconstruction is found to be the
most profitable in this particular instance, and is closely
followed by the actual form.

Feudalism in the service of the revolution Reclaiming heritage in hue

This article discusses the way the past is being reexamined in modern-day Vietnam, particularly through the medium of heritage. Hue, the old royal capital of Vietnam, provides the case study, as this city reflects the great themes and events of Vietnamese history over the last two hundred years, from the establishment of a unified nation under the Nguyen, through the imposition of colonial control, the devastation of war, reunification, and the establishment of communism, to the consolidation of an independent postcolonial nation. The importance of Hue's heritage is recognized in its status as a “world heritage” site. The author argues that Hue's heritage is, nevertheless, problematic for Vietnam's ruling communists, because to them it largely represents a regime—the Nguyen Dynasty—that was “reactionary” and that had sold out the country to the French. The apparent contradiction between the standard communist view of the Nguyen past and the value accorded to Nguyen heritage in Hue is resolved, the author contends, by recourse to the depoliticized practices of heritage preservation and tourist promotion.

Learning through computer-mediated communication: a comparison of Australian and Chinese heritage students

Twelve Australian and 12 Chinese heritage students from a third-year university computer ethics subject completed a Readiness for Online Learning Questionnaire; and six students from each of these two groups participated in a student-facilitated problem-solving discussion through computer-mediated communication. The questionnaire comparisons showed that the two groups of students were equally willing to self-manage their own learning, but that Australian students were significantly more comfortable with e-learning. The analysis of student postings in the CMC component showed that, collectively, Australian students posted more messages than did the Chinese students. Both groups participated equally in socialisation online; although Chinese heritage students posted a higher number of messages associated with organisational matters; and Australian students posted a larger number of message components associated with intellectual contributions to the discussion. These results are interpreted in a theoretical context and implications for practice are drawn.

Case study of demolition costs of residential buildings

Building demolition is one of the most common activities in the construction industry. Several demolition techniques are commonly used, including mechanical demolition, deconstruction and hybrid demolition. Although deconstruction has been advocated for its environmentally friendly approaches, the cost comparison of a demolition project under different techniques is rarely researched. In this paper, the cost of a demolition project is broken down to input and output costs, which are further broken down to more countable sections. Through an empirical study in Victoria, Australia, project costs of mechanical demolition, hybrid demolition and deconstruction are investigated. It is found that deconstruction has the greatest profitability among the three techniques. Hybrid demolition, which is the actual technique adopted by the contractor, has a slightly lower profit, and mechanical demolition is the most expensive. Although deconstruction has the best overall economical performance, the small extra gain comes with increased complexity and risk that deters demolition contractors from its attempt. It is found in the paper that an optimized demolition project strategy exists between hybrid demolition and deconstruction with the greatest profitability among various building demolition techniques.

UNESCO and cultural heritage practice in Australia in the 1950s: The international touring exhibition Australian Aboriginal Culture, 1948-55

This article investigates aspects of the production, dissemination and consumption of UNESCO’s first international touring exhibition, Australian Aboriginal Culture, in order to explore the relationship between UNESCO and Australia in the development of a key cultural heritage program. It argues that the exhibition indicates a national and international spirit of universalism that attempted to address crosscultural ignorance in a period of post-war optimism.

A house in history, heritage and tourism : shifting times at Blundell's Cottage, Canberra

The history of history's institutions can offer a gritty context in which to understand historical production. A wide spectrum of influences, from the personal to the intellectual to the political, can be seen at work in shaping the history made and communicated at Blundell's Cottage over the years. Even though it has always been a humble participant in the project of history, its products probably reach some of history's larger audiences. Hence it is worthwhile to review fifty years of historio-museography.

Globalization, nationalism and world heritage : interpreting Luang Prabang

This paper examines the interpretation of the World Heritage city Luang Prabang (the former royal capital of Laos), investigating the relationships between the goals and strategies of international organizations such as UNESCO and the priorities of the Lao state. Refuting the idea that the World Heritage system represents a form of cultural globalization, the authors instead suggest that there is a marked convergence of the interests of international heritage bodies managing World Heritage and the Lao authorities anxious to portray a particular vision of national identity through selective recognition of cultural heritage locations.

Environmental benchmarking of Hong Kong buildings

A method for assessing the environmental performance of Hong Kong’s buildings has been developed, known as the Hong Kong Building Environmental Assessment Method or HK-BEAM. The assessment is a type of expert-based survey, either of the design, in the case of proposed buildings, or an evaluation of building performance for newly built or existing buildings. The assessment essentially provides a benchmark of environmental performance against a series of qualitative and quantitative measures that earn “credits”. Buildings can be rated as “excellent”, “very good”, “good” or “fair”. The assessment covers global, local and indoor issues. The original assessment has been in use since 1996 and allowed appraisal of new and existing air-conditioned offices. A new version has been recently produced for residential buildings. The latest version has addressed some of the criticisms of the earlier versions and covers a wider range of issues, taking a life-cycle approach. Reviews the latest new residential version, making comparisons with the earlier new offices scheme.