• General Article

    Forensic assessment of a fail head wall of Hume Pipe Culvert: Focus on Geotechnical prospective
    Dharmendra Kumar Srivastava, Amit Srivastava, Anil Kumar Misra* and Vaishali Sahu
    The present study discuss and highlights the geotechnical aspects of failure case observed in the head wall of Hume pipe culverts constructed ... + READ MORE
    The present study discuss and highlights the geotechnical aspects of failure case observed in the head wall of Hume pipe culverts constructed at various locations on a bypass as apart work of four laning & strengthening of one of the national highways in India. Systematic forensic investigation of the observed cracks developed in a head wall of Hume pipe culvert suggested construction as well as design deficiencies. From geotechnical perspectives, various aspects of failure, such as, suitability of soil as foundation material, inadequate compaction of the foundation soil, settlement process and amount of settlement etc. were studied. Observed performance and development of crack at the location of stress concentration in the head wall were also verified through numerical analysis using commercially available finite element numerical tool PLAXIS 2D. Upon investigation, factors that lead to failure were (i) inadequate compaction, (ii) speedy construction, (iii) missing components due to negligence. Study suggested the following measures to prevent future damages, such as, use of reinforcement at the location of tensile stresses in the head wall, increase in the base width of the head wall to reduce the pressure and subsequent settlement of the foundation soil as well as strict quality control and quality assurance measures so as to ensure construction activities as per laid guidelines and procedures and detailed design and drawing available to the engineer-in-charge. - COLLAPSE
    September 2018
  • General Article

    The Zero-Waste City: Case study of port louis, mauritius
    Zaheer Allam*
    Climate change is a global phenomenon that is expected to affect cities around the world to differing degrees and scales. Developing and ... + READ MORE
    Climate change is a global phenomenon that is expected to affect cities around the world to differing degrees and scales. Developing and emerging cities have a range of challenges to deal with in responding to climate change while aspiring to leap frog outdated approaches. It will be important for these cities to undertake well informed and strategic approaches to respond to climate change in urban planning; both in adaptation and mitigation. However, the two do not always complement each other and focusing on one area may be counterproductive overall. Literature also shows that it is also important to understand that adaptation and mitigation strategies in low income cities need to focus on social and economic issues along with environmental measures. This paper seeks to investigate how waste management can offer an extra dimension where urban policies can contribute to move towards a net-zero carbon city. Through a focus on waste minimisation there are a range of mitigation options available that are associated with reducing the wastage of energy, materials, and water. This paper outlines the findings of an assessment of technological, environmental, institutional and socio-economic opportunities and challenges related to a ‘Zero Waste’ pathway for one small emerging African city; Port Louis, the capital city of the island of Mauritius. The findings of this study seek to inform policy makers to implement ‘Zero Waste’ policies and approaches in Mauritius. - COLLAPSE
    September 2018
  • General Article

    A study of the concurrent effect of the walls thermal resistance and air infiltration rate on the energy consumption of schools in the humid temperate climate of Iran
    Reza Amiri Fard, Mahmoudreza Saghafi* and Mansureh Tahbaz
    The infiltration rate and thermal resistance of the building envelope has a significant effect on the energy consumption of buildings among the ... + READ MORE
    The infiltration rate and thermal resistance of the building envelope has a significant effect on the energy consumption of buildings among the construction factors. Both of these factors are affected by the building envelope design and its details. The purpose of this paper is to find out how the interaction of these two factors simultaneously affects the building energy consumption. The case study of this research is the schools constructed based on the specifications and standards of the School Renovation Organization in the humid temperate climate of Iran. Due to the possible cross-impact of these two variables, the effect of these two is examined concurrently. Based on the results of this study in this climate, the infiltration rate of the building has a much greater influence than the thermal resistance of the building walls on the total energy consumption. Therefore, by reducing the building's leakage to minimum, the total energy consumption of the building can be reduced by 20%, And the process of reducing energy consumption as a result of increasing the thermal resistance of the walls is depended on the amount of Infiltration rate of the building. - COLLAPSE
    September 2018
  • General Article

    Can another sustainability rating system replace LEED-ND certification for multi-family housing projects?
    Jeyoung Woo, Hyunwoo Kim and Kangjun Lee*
    Built facilities consume significant amounts of energy during their project life cycle, and there is an increasing need to measure facility sustainability ... + READ MORE
    Built facilities consume significant amounts of energy during their project life cycle, and there is an increasing need to measure facility sustainability performance. To ensure high sustainability performance, sustainability rating systems have been developed and employed to proactively identify potential issues and quantitatively compare project sustainability performance. With a focus on walkable community development for multi-family housing projects, this study compared two sustainability rating systems: the Leadership in Energy and Environmental Design (LEED) for Neighborhood Development (ND); and the Walk Score. The authors selected 26 LEED-ND (v2009) certified projects and collected 20 Walk Scores within the boundary of 250-meter from the center of each LEED-ND certified project. The result shows that the Walk Score (Max: 100) has a positive and statistically significant association (the coefficient: 0.4686 at the significant level of 0.005) with the LEED-ND score (Max: 110). However, no correlation was found between the Walk Score and the LEED-ND category pertaining to walkability—the Neighborhood Pattern & Design (NPD) score (Max: 44). So, while the Walk Score was found to be an alternative rating system for measuring sustainability performance, the authors determined that LEED-ND certification could not replace the Walk Score when it comes to assessing walkability. - COLLAPSE
    September 2018
  • General Article

    Evaluation of heating and cooling load according to applying electrochromic glass to office building envelope in South Korea
    Myunghwan Oh, Seungjun Roh*, Minsu Jang and Jaesung Park
    Interest in zero-energy buildings has increased recently, and solar control is absolutely required to reduce cooling and heating loads of buildings effectively. ... + READ MORE
    Interest in zero-energy buildings has increased recently, and solar control is absolutely required to reduce cooling and heating loads of buildings effectively. Accordingly, we developed electrochromic glass, which is a next-generation smart solar-control glass, and its effectiveness in reducing cooling and heating loads compared to existing structural glasses and shading devices was investigated by analyzing the optical characteristics of the developed electrochromic glass and by building energy simulation. - COLLAPSE
    September 2018
  • General Article

    Analysis of the environmental impact emissions for the office building based on analysis of major building materials of life cycle assessment of G-SEED
    Hyojin Lim and Sungho Tae*
    This research aims to analyze the environmental impacts per step of the life cycle of the office building as part of the ... + READ MORE
    This research aims to analyze the environmental impacts per step of the life cycle of the office building as part of the reduction of GHG emissions in the construction sector. For this purpose, the data about the design documents, quantity and building energy efficiency rating were collected, and primary building materials and annual energy consumption of buildings were analyzed. In addition, according to the G-SEED 2016 building life cycle assessment guideline which is building certification system in South Korea, the environmental impacts generated in life cycle of office building were quantitatively assessed, and the environmental impacts of the production, construction, operation and decommissioning stages were analyzed. As a result of the analysis, the environmental impacts of each environmental impact category were largely generated at the production stage and the operation stage. In particular, the environmental impacts of global warming (GWP) and resource use (ADP) at the operation stage were dominantly analyzed. It is analyzed that the environmental impacts during operation are highly evaluated due to the energy consumption of the heating, cooling, hot water supply, lighting and ventilation sectors which are continuously used for 50 years. On the other hand, the results of the environmental impact assessment for the ozone layer (ODP) at the production stage were analyzed relatively higher than the GWP and ADP. In the upcoming future, it will be possible to reduce GHGs emissions in the building sector for the design of the building by analyzing the cause of the increase in the environmental impact of each stage and considering this. - COLLAPSE
    September 2018
  • Erratum

    Erratum to: Hydro-mechanical properties and durability of earth blocks: influence of different stabilisers and compaction levels
    M. Mahdad, A. Benidir* and A. Brara
    This paper focuses on experimental studies to assess the effect of mechanical and chemical stabilisation on compressed earth blocks strength and durability. ... + READ MORE
    This paper focuses on experimental studies to assess the effect of mechanical and chemical stabilisation on compressed earth blocks strength and durability. The relevance to the performance of compressed and stabilised blocks by moderate portions (less than 10%) of stabilisers such as cement and/or lime, cement and resin has been examined. The experiment consists of testing the stabilised and compressed earth blocks in order to appreciate the compressive strength, the impact of compactive effort, water absorption and finally the resistance against the surface erosion. Additionally, treated walls were exposed to climatic conditions in the aim to relate their durability. The results of the present investigation show that progressive addition of the different stabilisers substantially increases the compressive strength and reduces the water absorption of earth blocks. Furthermore, the improvement of the mechanical and hydrous properties of the compressed earth blocks is stated by rising gradually the moulding pressure. Moreover, under Mediterranean climate exposure, the diagnostic reveals that the walls built with cement or mixed additive are less affected by the damage. In return, the defects including surface roughening, pitting, cracking and erosion concern the un-stabilised or lime stabilised earth block walls. - COLLAPSE
    September 2018
Journal Informaiton Agriculture and Life Sciences Research Institute International Journal of Sustainable Building Technology and Urban Development
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