Characterisation of the performance of sustainable grout containing bentonite for geotechnical applications

The grouts used in sealing or backfilling boreholes should ideally be selected to be compatible with the insitu field instruments installed in the borehole and also be engineered to match closely the geotechnical properties of the parent soils. A stable grout can be made using cement with various proportions of bentonite. The grout stability is very important during both the liquid and set conditions. The liquid grout fluidity should be as viscous as possible to avoid segregation, yet fluid enough to be easily pumpable and fill voids and over-break in the borehole. This paper investigates the effect of bentonite on the fresh and rheological properties of cement-based grouts in order to develop a stable grout to be used in these geotechnical situations. These properties were evaluated by the mini-slump flow, marsh cone flow time, Lombardi plate cohesion meter, static bleeding, yield stress and plastic viscosity values. Additionally, the compressive strength at 3 days, 7 days and 28 days were also investigated. The key parameters investigated were the dosages of bentonite and water-to-binder ratio (W/B). Test results showed that the dosage of bentonite had a significant effect on the fluidity, rheological properties and compressive strength of grout. The increase in the dosage of bentonite led to increasing the values of flow time, plate cohesion meter, yield stress and plastic viscosity, and reducing the mini-slump results, the static bleeding and the compressive strength at 3 days, 7 days and 28 days. Conversely, the increase in W/B led to decreasing the values of flow time, plate cohesion meter, yield stress, and plastic viscosity and the compressive strength, while increasing the mini-slump results and bleeding. Some recommendations for suitable mix proportions for use in soil boreholes are made.

The role of facilities manager in sustainable practice in the UK and Ireland

Purpose – The purpose of this paper is to explore the role of facilities managers in sustainable practice. It also analyzes the change in facilities management (FM) in terms of sustainability.<br/><br/>Design/methodology/approach – This research adopted a combination of literature review and expert interviews. Empirical data were collected through in-depth interviews with 40 industrial experts in the UK and Ireland.<br/><br/>Findings – The analysis of interview results shows a sustainable movement in the context of FM. Facilities managers play important roles in sustainable practice, including integrating all sustainability considerations, linking strategic level with operational level, incorporating FM knowledge and experience into design, disseminating sustainable knowledge and educating people and encouraging sustainability through innovation.<br/><br/>Research limitations/implications – This research goes beyond the limitations of existing studies that are characterized by a lack of positioning facilities managers in sustainability.<br/><br/>Practical implications – Sustainable delivery represents a direction of FM development. This research describes what facilities managers can do and how they should do for sustainable delivery of FM, based on which improvements are made and benefits are maximized.<br/><br/>Originality/value – This research provides a deeper insight into the FM role in the sustainable agenda. The findings of this research help industrial practitioners and academic researchers to better understand sustainable FM.

Spatial Allocation of Material Flow Analysis: A Geographic Information System Application of Material Flow Analysis in Ireland

This study concerns the spatial allocation of material flows, with emphasis on construction material in the Irish housing sector. It addresses some of the key issues concerning anthropogenic impact on the environment through spatial temporal visualisation of the flow of materials, wastes and emissions at different spatial levels. This is presented in the form of a spatial model, Spatial Allocation of Material Flow Analysis (SAMFA), which enables the simulation of construction material flows and associated energy use. SAMFA parallels the Island Limits project (EPA funded under 2004-SD-MS-22-M2), which aimed to create a material flow analysis of the Irish economy classified by industrial sector. SAMFA further develops this by attempting to establish the material flows at the subnational geographical scale that could be used in the development of local authority (LA) sustainability strategies and spatial planning frameworks by highlighting the cumulative environmental impacts of the development of the built environment. By drawing on the idea of planning support systems, SAMFA also aims to provide a cross-disciplinary, integrative medium for involving stakeholders in strategies for a sustainable built environment and, as such, would help illustrate the sustainability consequences of alternative The pilot run of the model in Kildare has shown that the model can be successfully calibrated and applied to develop alternative material flows and energy-use scenarios at the ED level. This has been demonstrated through the development of an integrated and a business-as-usual scenario, with the former integrating a range of potential material efficiency and energysaving policy options and the latter replicating conditions that best describe the current trend. Their comparison shows that the former is better than the latter in terms of both material and energy use. This report also identifies a number of potential areas of future research and areas of broader application. This includes improving the accuracy of the SAMFA model (e.g. by establishing actual life expectancy of buildings in the Irish context through field surveys) and the extension of the model to other Irish counties. This would establish SAMFA as a valuable predicting and monitoring tool that is capable of integrating national and local spatial planning objectives with actual environmental impacts. Furthermore, should the model prove successful at this level, it then has the potential to transfer the modelling approach to other areas of the built environment, such as commercial development and other key contributors of greenhouse emissions. The ultimate aim is to develop a meta-model for predicting the consequences of consumption patterns at the local scale. This therefore offers the possibility of creating critical links between socio technical systems with the most important challenge of all the limitations of the biophysical environment.

Climate change adaptation : a decision support framework to encourage environmentally responsible behaviour

Structured Abstract:<br/>Purpose: Very few studies investigate environmentally responsible behaviour (ERB). This paper presents a new 'Awareness Behaviour Intervention Action' (ABIA) Decision Support Framework to sustain ERB.<br/><br/>Design/methodology/approach: Previous ERB programmes have failed to deliver lasting results; they have not appropriately understood and provided systems to address ERB (Costanzo et al., 1986). These programmes were based on assumptions (Moloney et al., 2010), which this paper addresses. The ABIA Framework has been developed through a case study of social housing tenants waiting for low or zero carbon homes.<br/><br/>Findings: The ABIA Framework enables a better understanding of current attitudes to environmental issues and provides support for ERB alongside technological interventions employed to promote and sustain carbon reduction. <br/><br/>Research limitations/implications: The ABIA Framework should be tested on individuals and communities in a variety of socio-economic, political and cultural contexts. This will help unpack how it can impact on the behaviours of individuals and communities including stakeholders. <br/><br/>Practical implications: This type of research and the ABIA Framework developed from it are crucial if the UK pledge to become the first country in the World where all new homes from 2016 are to be zero carbon. <br/><br/>Social implications: The Framework encourages both individual and community discussion and solving of sustainability issues. <br/><br/>Originality/value: There are few, if any, studies that have developed a framework which can be used to support behavioural change for adaptation to sustainable living in low or zero carbon homes.<br/>

Corporate Social Responsibility within the Northern Ireland Construction Industry: A Regional Review

As the construction industry continues to struggle with a poor societal image, many organizations have adopted a positive corporate social responsibility (CSR) towards their surrounding environment, with the objective of improving their persona within social circles. The aim of this research is to identify and document the various approaches adopted by UK contractors in relation to their international counterparts to aid in the identification of possible future benefits which may be exploitable.<br/>In order to acquire the relevant information, a number of qualitative methodologies are adopted including a review of the current literature on the topic along with a detailed semi-structured interview with a UK based industry professional that specializes in corporate social responsibility. Through assessing the findings using qualitative analysis software, it is possible to disseminate the information, resulting in the identification of key findings. This research concludes that a number of factors profoundly affect corporate social responsibility within the UK versus other regions. These factors are identified as the effect of the recession, implementation and reporting along with competitiveness within the sector.<br/>The impaction for practice within the UK construction sector of this research is that it enables various industry leaders to actively consider the findings of the research while also vigorously encouraging the establishment and development of corporate social responsibility, not only within their respective organizations, but within the construction industry as a whole. This would not only result in a more environmentally sustainable industry, but would also raise the awareness of the sector locally, nationally and internationally, therefore improving the overall perception of the sector on a variety of levels. This will ultimately lead to a more sustainable, environmentally friendly and collective industry while also considering the needs of one of its most important external stakeholders – the local community.

Construction Industry Attitudes to Global Environmental Change: A Comparison with the United Kingdom and Japan

With the continued diffusion of global boundaries coupled with the onset of increased environmental pressure, construction industry attitudes are also shifting. The aim of this paper is to evaluate the construction industry attitudes to global environmental change in both the United Kingdom and Japan. In order to achieve this goal, a qualitative mixed method approach is adopted, encompassing a desk based critique of the literature coupled with an industry interview from both regions. This methodology is adopted with the objective of ascertaining if there are any geographical similarities or differences with the regions in question. The resulting information is analyzed and the results deciphered utilizing mind mapping techniques in the dissemination of the data obtained with the objective of identifying various traits within the data. The results indicate that the United Kingdom and Japan both illustrate various attributes in relation to attitudes towards the global environment. In particular, research indicates that in the Japanese construction industry, there is a distinct lack of enthusiasm shown in construction industry attitudes to counteract environmental challenges currently being faced by implementing sustainable practices, compared to attitudes in the UK construction industry. One of the reasons identified for this, is the lack of leadership provided by the corresponding government, thus resulting in the lack of promotion of sustainable practices in the region. The benefit of this research is that it enables various industry leaders, regardless of geographical location, to actively consider the attitudes and perceptions of those around them, particularly in relation to the sensitive topic of global environmental change within the industry. Where the findings are acknowledged and also utilized, the results should aid in the improvement of the industry on an international scale, while also improving the overall persona of environmental change within the sector.

Performance monitoring of energy efficient retrofits – 4 case study properties in Northern Ireland

Approximately half of the houses in Northern Ireland were built before any form of minimum thermal specification (U-value) or energy efficiency standard were available. At present, 44% of households are categorised as being in fuel poverty; spending more than 10% of the household income to heat the house to an acceptable level. This paper presents the results from long term performance monitoring of 4 case study houses that have undergone retrofits to improve energy efficiency in Northern Ireland. There is some uncertainty associated with some of the marketed retrofit measures in terms of their effectiveness in reducing energy usage and their potential to cause detrimental impacts on the internal environment of a house. Using wireless sensor technology internal conditions such as temperature and humidity were measured alongside gas and electricity usage for a year. External weather conditions were also monitored. The paper considers the effectiveness of the different retrofit measures implemented based on the long term data monitoring and short term building performance evaluation tests that were completed.

Case study investigation of indoor air quality in mechanically ventilated and naturally ventilated UK social housing

There is a significant lack of indoor air quality research in low energy homes. This study compared the indoor air quality of eight<br/>newly built case study homes constructed to similar levels of air-tightness and insulation; with two different ventilation strategies (four homes with Mechanical Ventilation with Heat Recovery (MVHR) systems/Code level 4 and four homes naturally ventilated/Code level 3). Indoor air quality measurements were conducted over a 24 h period in the living room and main bedroom of each home during the summer and winter seasons. Simultaneous outside measurements and an occupant diary were also employed during the measurement period. Occupant interviews were conducted to gain information on perceived indoor air quality, occupant behaviour and building related illnesses. Knowledge of the MVHR system including ventilation related behaviour was also studied. Results suggest indoor air quality problems in both the mechanically ventilated and naturally ventilated homes, with significant issues identified regarding occupant use in the social homes<br/>

An investigation of IAQ, thermal comfort and Sick Building Syndrome symptoms in UK energy efficient homes

Purpose<br/>– Concern of the deterioration of indoor environmental quality as a result of energy efficient building design strategies is growing. Apprehensions of the effect of airtight, super insulated envelopes, the reduction of infiltration, and the reliance on mechanical systems to provide adequate ventilation (air supply) is promoting emerging new research in this field. The purpose of this paper is to present the results of an indoor air quality (IAQ) and thermal comfort investigation in UK energy efficient homes, through a case study investigation. <br/><br/>Design/methodology/approach<br/>– The case study dwellings consisted of a row of six new-build homes which utilize mechanical ventilation with heat recovery (MVHR) systems, are built to an average airtightness of 2m3/m2/hr at 50 Pascal’s, and constructed without a central heating system. Physical IAQ measurements and occupant interviews were conducted during the summer and winter months over a 24-hour period, to gain information on occupant activities, perception of the interior environment, building-related health and building use. <br/><br/>Findings<br/>– The results suggest inadequate IAQ and perceived thermal comfort, insufficient use of purge ventilation, presence of fungal growth, significant variances in heating patterns, occurrence of sick building syndrome symptoms and issues with the MVHR system. <br/><br/>Practical implications<br/>– The findings will provide relevant data on the applicability of airtight, mechanically ventilated homes in a UK climate, with particular reference to IAQ. <br/><br/>Originality/value<br/>– IAQ data of this nature is essentially lacking, particularly in the UK context. The findings will aid the development of effective sustainable design strategies that are appropriate to localized climatic conditions and sensitive to the health of building occupants.<br/>

An analysis of International NGOs design decision making for housing reconstruction in developing country contexts

The purpose of this paper is to explore the current design decision making process of selected foreign international non governmental organisations (INGO’s) operating in the field of housing and post disaster housing design and delivery in developing countries. The study forms part of a wider on-going study relation to a decision making in relation to affordable and sustainable housing in developing<br/>countries. The paper highlights the main challenges and opportunities in relation to the design and delivery of low cost sustainable housing in developing countries as identified in current literature on the subject. Interviews and case studies with INGO’s highlight any specific challenges faced by foreign INGO’s operating in a developing country. The preliminary results of this research study provide a concise insight into the design decision making process of leading foreign INGO’s operating in developing countries and will be beneficial to policy makers, NGOs, government bodies and community organisations in practice as it offers unique evidence based insights into international bodies housing design decision making process.

Critical Success Factors of Construction Project Quality in Brunei Darussalam

This research concentrates on the critical success factors driving construction quality and the barriers that must be overcome to achieve quality in Brunei. It hopes to identify methods of quality improvement and clearly justify investment in this area of local industry. Over the past number of years, Brunei has attempted to diversify its industry from the dominant oil and gas sector into secondary sectors,<br/>including construction. To date, very little research has been carried out in many areas of construction management that take into account the specific industry context in Brunei. A comprehensive literature review has been employed to enable a questionnaire to be constructed and distributed among Brunei construction<br/>professionals. The results have been analyzed through mean testing. This analysis reveals that the key barriers to construction quality in Brunei relate to lack of skills, lack of clarity in responsibility and communication and poor commitment among the design team. The critical success factors include issues relating to competency, capability, commitment and effectiveness, primarily among managers and decision-makers. The results of this study will hopefully contribute to fill the knowledge gap related to construction management in the context of Brunei and facilitate movement towards improved techniques and strategies that will foster higher quality in construction. The findings can be generalised across similar<br/>developing economies and it is suggested that in general, the management concepts governing construction quality remain similar across the borders of East and West.

A Community Driven Approach to Reconstruction Management

Without human beings, and human activities, hazards can strike but disasters cannot occur, they are not just natural phenomena but a social event (Van Der Zon, 2005). The rapid demand for reconstruction after disastrous events can result in the impacts of projects not being carefully considered from the outset and the opportunity to improve long-term physical and social community structures being neglected. The events that struck Banda Aceh in 2004 have been described as<br/>a story of ‘two tsunamis’, the first being the natural hazard that struck and the second being the destruction of social structures that occurred as a result of unplanned, unregulated and uncoordinated response (Syukrizal et al, 2009). Measures must be in place to ensure that, while aiming to meet reconstruction<br/>needs as rapidly as possible, the risk of re-occurring disaster impacts are reduced through both the physical structures and the capacity of the community who inhabit them. The paper explores issues facing reconstruction in a post-disaster scenario, drawing on the connections between physical and social reconstruction in order to address long term recovery solutions. It draws on a study of relevant literature and a six week pilot study spent in Haiti exploring the progress of recovery in the Haitian capital and the limitations still restricting reconstruction efforts. The study highlights the need for recovery management strategies that recognise the link between social and physical reconstruction and the significance of community based initiatives that see local residents driving recovery in terms of debris handling and rebuilding. It demonstrates how a community driven approach to physical reconstruction could also address the social impacts of events that, in the case of places such as Haiti, are still dramatically restricting recovery efforts.