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The World Heritage site of Moenjodaro, located in the Indus flood plain and dating to the early Bronze Age, is believed to be the most important urban centre of the Indus valley culture. The purpose of the paper is to discuss the main conservation threats and the mechanisms of decay affecting the site and to understand the influence of soluble salts on materials such as fired brick and soil. Furthermore, the paper aims to describe the repair methods employed against salt attack and provides a scheme for site management.

In the paper a literature review is followed by laboratory experiments.

The main result is the experimental assessment of the repair materials and methods traditionally employed in Moenjodaro. No evaluation was undertaken prior to this study and this makes the work the more relevant.

A more complete and detailed study of the materials examined here might have been achieved if more samples had been analysed. The present study is therefore characterised by this limitation which, however, does not undermine the significance of the work.

The results have practical applicability to the conservation of Moenjodaro in a variety of ways. The experimental analysis of materials will be essential to determine the type of intervention required for conserving the site.

The value of this paper derives from the originality of the work done, being the first of its kind for Moenjodaro. It will be especially useful to those conservators working in the site, but also in similar sites. It stresses the importance of testing before any conservation work is carried out.

Local dwellings of Bangladesh have specific environmental characteristics. These dwellings extensively use locally available materials and construction techniques. Therefore, carbon footprint (CF), as a prominent environmental parameter, is greatly affected by construction materials and techniques. Nonetheless, scientific justification is limited to evaluate CF of these dwellings in Bangladesh according to different local construction materials. The main purpose of this study is to evaluate different rural dwellings’ CF for both construction and operational phases toward the development of low carbon society in Bangladesh.

For evaluating CF, literature review and field studies were conducted to specify and categorize cases. An intensive field monitoring and occupant's survey were performed during summer. A widely recognized compliant database and assessment tool “Ecoinvent v3” was used based on International Organization for Standardization (ISO) 14040 and 14044. Quantitative and qualitative data were collected to evaluate constructional and operational stages of carbon emission using hybrid methods formed by process-based and economic input–output life cycle analysis (EIO-LCA) approaches.

The study indicates that different building materials significantly impact on dwelling's amount of carbon emission according to construction techniques. Brick dwelling's construction stage carbon emission was nearly 3.86 times higher than timber, whereas, 6.75 times higher than mud dwelling. In terms of operational stage, local brick dwelling emits higher carbon compared to others relating to occupants’ lifestyle and activities.

This study will contribute to helping professionals and policy-makers to interpret and evaluate architectural design and construction processes for improving low-carbon dwellings in Bangladesh.

Salt weathering is one of the most common agents of decay of Central Asian earthen sites and is in function of water evaporation from the wall surface. Soon after excavation the earthen walls and the stupa of the Buddhist temple of Ajina Tepa (seventh-eighth century AD) started to deteriorate due lack of protection and surface erosion. The most important issue in the planning of conservation work was to understand such mechanisms and to decrease the effect of salt weathering on structural damage. The purpose of this paper is to discuss these issues.

Evaporation distribution and salts types were studied on selected walls. In addition, three-dimensional recording of the walls and the stupa was undertaken with digital photogrammetric methods.

It was clearly found that the intensity of salt weathering in the site is high and some salts such as halite (sodium chloride) are thought to originate from groundwater. On the basis of the results obtained, thick shelter coating with mud brick and mud render was designed and constructed as protective measure for the earthen walls.

Those walls that were most affected by salts weathering and erosion at the base (coving) became structurally less sound and eventually collapsed if not conserved.

The work is the first attempt in the design of a methodology for the selection of earthen repair materials and methods.

Post-disaster reconstruction poses a double-edged sword to its implementers as it demands addressing survivors’ need for speed as well as meeting the growing expectation to trigger resilience. While an owner-driven housing reconstruction (ODHR), inter-disciplinary and long-term approach has been promoted internationally; however, there is limited research focussed on the long-term impacts (>10 years after a disaster) of ODHR. Furthermore, there is no one accepted framework for practitioners to guide through the process of ODHR projects to carve pathways for disaster resilience. The purpose of this paper is to assimilate findings—contingent and generalisable—into a novel framework for future change in practice.

This paper deployed a mixed methods methodology with a comparative case study research method. Two case study projects were from the Indian state of Gujarat, 13 years after the 2001 earthquake and the other two from Bihar, 6 years since the 2008 Kosi river floods. Due to multi-disciplinary nature of research, empirical data collection relied on a mix of social sciences methods including 80 semi-structured interviews, and architectural research methods including the visual analysis of photographs and sketches. Three sample groups of agency members, beneficiaries and non-beneficiaries were purposively selected. Thematic content analysis was used for the data analysis.

The paper provides empirical insights on how ODHR projects in Indian states of Gujarat and Bihar succeeded at enhancing disaster resilience of communities. It suggests that the civil society organisations acted as “enablers” at four stages: envisioning strategically based on systemic understanding, building soft assets including community trust and dignity for social mobilisation prior to, proposing minor modifications to construction technology for its multi-hazard safety as well as cultural relevance, and sustaining capacity building efforts beyond reconstruction completion or beyond one project life-cycle.

The author of this paper cautions that the spiral framework needs further development to make it flexibility and customisable to suit the specifics of a particular context.

The implications of the findings discussed in this paper are primarily for practitioners involved in disaster recovery and development sector. Since prevailing models or frameworks neither incorporate multi-disciplinary approach (demanded by socio-ecological systems resilience concept), nor represent project scale, a novel, four-pronged framework for ODHR has been proposed in this paper for strategic success. The framework has been illustrated in spiral and tabular forms, and has been kept abstract to provide practitioners the much-needed flexibility for adapting it to suit the specifics of a particular context.

Understanding the thermal performance of sandcrete hollow block walls in the tropic is very essential for occupants' well-being, productivity and efficiency, due to its widespread application in buildings in the study area. Lokoja, in Nigeria, lies in the warm humid zone with its attendant's high temperatures all year round. Thus, providing an acceptable walling material that will control the high indoor air temperature becomes imperative. This paper assessed sandcrete hollow blocks as a walling material used in Lokoja, to determine the thermal performances for effective thermal comfort of the residents.

It involves the construction of a habitable model building with the commonly available sandcrete hollow blocks in the area. One unit of Cryopak iMINI Temperature and Relative Humidity Data Logger called new generation intelligent iMINI with Serial Number and Product Code MX-CI-145–0009 and MX-HE-S-16-L was installed, to record the indoor air temperature and relative humidity data at an interval of one hour, for 12 months covering dry and wet seasons. The results of the recorded data were downloaded to an excel spread sheet for assessment and analysis throughout the seasons. The values were computed using the temperature–humidity index (THI) equation, with a view to determine the indoor thermal comfort level category.

The study revealed that sandcrete hollow block walls provide thermal discomfort of the indoor environment for both seasons, with attendant adverse effects in the comfort of the occupants. The paper concludes that proper orientation of buildings, planting of trees, use of low absorbing or reflective surface materials, application of cavity walls to receive insulation materials in between the hollow spaces provided, instead of the single walling as well as providing shading device elements, can improve users' comfort and also ameliorate the heat effect on the external surface of building transferred into the interior by conduction, radiation or convection within the area and in the tropics at large. Other thermally eco-friendly wall materials available in Lokoja includes timber, stabilized laterite–cement blocks, burnt bricks and earth-mud bricks which can be used to replace sandcrete hollow block walls. These alternative wall materials are used for construction of residential and office buildings by the colonial government of Sir Fredrick Lugard in the study area.

The application of sandcrete hollow blocks as a wall material is in vogue, not minding its thermal discomfort to the users and the environment; this is due to its availability and ease of production. The acceptability of this walling material requires holistic study to unravel the best way to reduce the thermal discomfort inherent in its application.

The author succeeded in revealing the thermal performance of sandcrete hollow blocks as walling material in Lokoja, the study area. It is a first attempt at understanding the performance for human comfort in the area. This will greatly assist the resident and other researchers to improve on the application of sandcrete hollow blocks as walling material towards ensuring that maximum indoor thermal comfort is achieved.

Vernacular architecture is an architectural style of buildings that were constructed by artisanal builders who lacked formal qualifications, used local materials and had a deep understanding of local climatic needs. This approach addressed climatic, energy, materials and construction issues in a low-cost way. Building interiors were often made comfortable by using passive internal climate regulation methods, which could be key to resolving some of the current issues of the modern world.

Tamil Nadu is a land full of local architecture, with Konearirajapuram settlement a thriving specimen of its vernacular architecture, as one of the original Vathima villages (planned Brahmin villages). Here the authors present an appraisal of this settlement's native architecture with its various passive design elements. A questionnaire survey was also conducted among local residents, living in both vernacular and contemporary residential buildings, to understand the quality of indoor environmental comfort in the different building types (single courtyard, multiple courtyards and multiple story houses with courtyards).

The results of this study show that energy-efficient bioclimatic design strategies of traditional buildings can be analyzed with the help of climatic data and analysis tools such as Mahoney tables and Olgyay's bioclimatic chart. The study shows that vernacular design techniques and principles conserve more energy than modern buildings. The findings suggest that practical solutions for improving contemporary residential developments can be found in traditional architectural approaches and that these approaches should be incorporated in new developments to achieve energy efficiency and a sustainable future.

A detailed survey and the user preferences are plotted in detail in this paper; similarly, Mahoney table and its requirements are analyzed with respect to context; and the results are elaborated and justified.

This study analyzes an entire settlement of Konearirajapuram with 300 units of vernacular residences high in comfort even at extreme climates. Assessment is carried in both qualitative case and quantitative case. Even though there are no previous studies analyzed to identify the effectiveness of the artisanal builders of bioclimatic architecture. Hence, this study brings out the solution for current energy problems from the traditional settings, because the traditional buildings requires no active systems for indoor comfort except a fan, which is negligible in terms of energy use.

This paper aims to shed light on adaptive reuse in traditional architecture (TA) in Erbil, Iraq.

An inductive approach and qualitative method were used in this study. The inductive research approach was used because there was no clear image of adaptive reuse in traditional cafés (TCs) in Erbil. Besides, there are no studies of TCs in Erbil particularly. Thus, there is a lack of knowledge about what adaptations took place in TCs in Erbil. The qualitative method extracted themes and issues from case studies of four TCs in Erbil citadel's buffer zone. This included a physical survey and observation of the TCs in Erbil and 18 semi-structured interviews with the owners, servers and visitors.

The analysis shows the flexibility of the TCs in Erbil as a face of adaptive re-use (AR) which is explained through the capacity linked to space modifications, the addition of modern devices, the function linked to space modifications, service addition, the condition linked to space modifications and the addition of modern devices. Also, TCs in Erbil has a spatial identity and architectural value that proves it is worthy enough to be preserved through unique spirituality linked to preserving the place.

The findings are limited to the cases of TCs in mountain regain and may not be applicable or appropriate to other cafés in other different countries.

There are three aspects of authenticity in the current research. Firstly, the TCs in Erbil have not been studied before. Secondly, TCs that have been discovered have made AR of themselves whilst maintaining their original function-serving beverages, to stimulate creativity. Thirdly, most of the studies of AR have dealt with historical and heritage architecture, whilst the current research paper is dealing with TA.

This paper aims to demonstrate the optimization of an existing residential building in a tropical climate using indigenous materials as an alternative to conventional building envelopes to achieve thermal comfort and affordable housing.

This study mainly adopted a quantitative research methodology through a comprehensive simulation study on a selected prototype building. The energy plus simulation tool in DesignBuilder was used to predict the average monthly and annual thermal comfort of a typical residential building in the study area. Also, a cost analysis of the final optimization interventions was conducted to estimate the construction cost savings.

The comparative analysis of simulation results for the base-case and optimized models indicates potential advantages in replacing conventional building envelope materials with indigenous materials. The base-case simulation results showed that the annual operative temperature is more than the adaptive thermal comfort set points in tropical climates, by 8.26%. This often leads to interventions using mechanical cooling systems, thus triggering overconsumption of energy and increase in CO₂ emissions. The building envelope materials for floor, walls and roof were replaced with low U-values indigenous materials until considerable results in terms of thermal comfort and overall building construction cost were achieved. The final simulation results showed that using indigenous materials for the ground floor, external walls and roof could substantially reduce the annual operative temperature by 8%, thereby increasing the predicted three months of thermal comfort in the base-case to nine months annually. Likewise, there was a 32.31%, 35.78% and 41.81% reduction in the annual CO₂ emissions, cooling loads and construction costs, respectively.

The knowledge of indigenous materials as an alternative to conventional materials for sustainable buildings is not new. However, most of the available research is focused on achieving affordable housing. There is a dearth of research showing the extent that these indigenous materials can be used to improve indoor thermal comfort in developing countries with tropical climates such as Nigeria.

WHEN ZAMBIA became independent, in 1963, neither education nor libraries impinged on the lives of the large majority of people; there were a few municipal libraries, and rural areas were served by Zambia Library Service, then only two years old. Since then the service has expanded enormously, so that there are now almost 600 library centres. Some of these are operated by rural councils or ‘bomas’ (comparable to town halls), but many are operated on a voluntary basis, by school teachers or even by private individuals. Some serve only the establishment which runs them, whether they be cooperative training centres or prisons; many, however, extend facilities to the nearby villages, where the proportion of literate people is rarely very high. There is, however, a great demand for books among those who can read, because, despite the great expansion in secondary schools since independence, education is still inadequate, with less than a tenth of those who leave primary school finding a place in secondary school. Many of these try to further their education (mainly to improve their employment opportunities) by private study or correspondence courses. Such is the demand that one prison librarian wrote asking for more books because too many outsiders were coming in to borrow those they had; (to do this they had to pass two or three guarded gates and sign the visitor's book stating their reason for entering the prison).