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Sustainability is well understood to encapsulate economic, environmental and societal parameters. The efficiency of maintenance interventions for historic buildings is no exception and also conforms to these broad factors. Recently, environmental considerations for masonry repair have become increasingly important and this work supports this growing area. The purpose of this paper is to give insight on how an option appraisal approach of “Green Maintenance” modelling for historic masonry buildings repair practically determine and ultimately substantiate the decision-making process using a calculation procedures of life cycle assessment, within delineated boundaries.

Calculation procedures of the model enables an assessment of embodied carbon that is expended from different stone masonry wall repair techniques and scenarios for historic masonry buildings during the maintenance phase.

It recognises the importance roles Green Maintenance model can play in reducing carbon emissions and underpins rational decision making for repair selection.

It must be emphasised that the calculation procedures presented here, is not confined to historic masonry buildings and can be applied to any repair types and building form. The decisions made as a result of the utilisation of this model practically support environmentally focused conservation decisions.

The implementation of the model highlights the efficacy of repairs that may be adopted.

The paper is a rigorous application and testing of the Green Maintenance model. The model relays the “true” carbon cost of repairs contextualised within the longevity of the materials and its embodied carbon that consequently allows rational appraisal of repair and maintenance options.

Deterioration in natural stone is associated with many decay mechanisms and often the inherent composition of the materials themselves. Sandstone varies considerably but they all require a cementing matrix to bind amongst others, the silica (SiO₂) particles together (Reading, 1989). In calcareous sandstones and limestones this binding matrix is principally calcium carbonate based (Muir, 2006; Reading, 1989; McMillan et al., 1999) in the form of calcite (CaCO₃). Friable sandstone substrates and stones suffering from “surface dissolution” or disaggregation (Muir, 2006; Smith et al., 1992) have been traditionally consolidated utilising a host of chemical compounds that had, in many cases negative effects on their long-term performance (Muir, 2006). A principle issue amongst many was moisture entrapment and irreversibility of the consolidants adopted. The paper aims to discuss these issues.

This paper investigates the effect of microbial induced calcite precipitation (MICP) as a natural treatment for the conservation of historic natural stone substrates. Sporosarcina pasteurii has been proven as a bacterium that can perform MICP effectively in extreme conditions making it the preferred bacterium for the MICP process within this study. Surface treatment experiments were analysed by measuring the mass increase and surface changes using scanning electron microscopy (SEM).

The surface treatments showed a noticeable mass increase and observable deposition when viewed using a SEM microscope. Bio cementation of loose sand particles was observed and the degree of cementation was determined using a Moh's hardness test.

Recommendations for further work to improve this study are: use an increased Sporosarcina pasteurii cell optical density which would provide a greater calcite output. Carry out a paired comparison initial surface absorption test (BS 1881: Part 208, 1996 or ASTM C 1585-04, 2004). To be carried out on untreated control and MICP samples which would determine the pore blocking effect and surface repair capability of the treated samples.

A method for obtaining optimal results in terms of surface treatment would involve reducing the time between mixing and application, this would require having the two reaction constituents mixed only seconds before use. Using a late mix spray application system has the potential to allow the two mixtures to combine in the spray nozzle whilst exiting the apparatus.

This paper investigates a safe, natural process for stone repair.

The techniques available for the repair of historic masonry structures are extremely wide ranging. The advantages and disadvantages of each type of repair can be evaluated in terms of cost, time and quality as with modern projects. It is however, important to realise that when repairs to historic buildings are selected they must conform to building conservation philosophy, or an ethical and principle based evaluation. The purpose of this paper (part 2 of 2) is to establish what is meant by principles in this context and wherever possible apply practical examples to illustrate these concepts.

Evaluative literature review of the principles encapsulated within building conservation philosophy utilising them to stimulate discussion on practical repair interventions.

It has been shown that the principles of building conservation philosophy must be considered prior to making decisions relating to masonry repair. These repairs have varying degrees of defensibility, and will ultimately lead to good or bad conservation approaches. This paper briefly discusses the principles, highlighting some of the issues that may be initially confusing to the practitioner.

The evaluation of building conservation philosophy for masonry repair, and more specifically the “principles” have been little studied. The importance of this cannot however be over stated, as far from being an esoteric concept it affects every practical repair. This work brings together the study of the philosophical and practical, enabling practitioners to better understand the ramifications of building conservation philosophy for their projects. It must however be emphasised that as with any aspect of philosophy, there is not necessarily a right or wrong answer, only higher levels of defence for the selected repairs.

Some historic observations With the exception of our prehistoric and primitive stone built ‘homes’ such as Chysauster and Cam Euny hut circles in Cornwall, the cromlechs, dolmens and stone circles at Avebury and Stonehenge, it was the Romans who introduced fine and sturdy stone construction into our country. The Anglo‐Saxons left many fragments of their crudely dressed stone towers and chancels of their churches, which have survived due to their robust construction. The timber construction of the Dark Ages gave way to stone again and to the gradual establishment of the craft of the stonemason.

Describes a number of ways in which fluorescent dyes have been used to investigate different construction problems, highlighting in particular the areas of stone cladding cracking, moisture prevention in cavity walls and microscopical and reconstructed stone testing. Concludes that good observation, coupled with careful consideration of the problems in hand, is essential to ensure that the appropriate methods are used and the right conclusions drawn.

The Indian marble and stone industry has got the potential to contribute well to the development of the emerging economy. However, unlike the other Indian industries, stone and marble industries are highly underrated sectors, which may become a critical factor for development. This paper analyses the sustainability factors in supply chain management practices.

A literature review is used to identify the barriers and drivers in sustainable supply chain management practices. Interpretive structural modeling has been used to obtain a hierarchy of barriers and drivers along with driving power and dependence power analysis. Further, MICMAC analysis is used for segregating the barriers and drivers in terms of their impact on sustainability.

The findings of the work of this research are that the attention of society, government, and commercial banks should be more toward the unorganized condition of stone and marble sector. There should be an increase in the commitment of stakeholders to reduce pollution and install safety, by enforcing more relevant laws and regulations and creating the importance of environmental awareness.

The main contribution of this research is to identify the barriers and drivers of sustainable supply chain management in a stone and marble industry. The paper proposes a sound mathematical model to prioritize the critical factors for responsible production and consumption of resources from sustainability perspectives of stone industry.

The purpose of this paper is to ensure the preservation and sustainability of traditional water mills in Turkey with their original function and to allow these water mills to become heritage for future generations.

The study is the original examination of one sample water mill to be conserved, that is chosen from 11 water mills that were determined after the investigation of water mills in of Antalya, in Mediterranean Region. A preliminary study was first performed using the external observation method on 11 horizontal wheel water mills. The water mills to be accorded the highest priority with regards to conservation were selected based on their characteristics. Restoration techniques were then proposed to ensure the sustainability of the traditional production systems while retaining their original function.

The decision of water mill with the highest priority of conservation is based on the analysis of “structural damage,” “all seasons accessibility” and “supporting environmental factors.” This water mill was used primarily for grain production and is located on the Doyran River in Antalya. Current circumstance of the sample mill is analyzed, restoration techniques for the purpose of conservation and creation of recreational sites and that enable the presentation of traditional production methods are suggested.

This paper includes implications for the contribution to the region’s cultural identity by developing the region’s infrastructure for cultural and ecological tourism and by ensuring the continuation of traditional production methods and craftsmanship.

This paper brings a new approach to the identification of water mills and the decision of the water mills to be conserved as a result of field studies.

Buildings have always been the result of labour and materials applied with enterprise and this has changed little since the Middle Ages: the principal source of building materials remains the ground and plants growing from it. While labour has always been mobile, the materials in any building inevitably reflect the local geology and natural environment as it has always been uneconomic to import foreign ingredients to site. This second article in the series attempts to identify modern sources of some of the most sought‐after basic materials required in conservation works.

Stone has been used as a structural material in the United Kingdom since mediaeval times, both in the form of dimension stone in the great cathedrals and, more recently, in the form of cladding for modern office buildings. There is a range of indigenous building stone used in Britain ranging from granites, lime‐stones, sandstones and magnesian lime‐stones, to dolomitic sandstones, slates and others. Marbles are used extensively, but are mainly imported. The mediaeval cathedrals were in the main built from stone available from nearby quarries, eg Lincoln stone, Doulting stone (Wells Cathedral), but some of those quarries are almost worked out and alternative currently available sources of stone which is aesthetically and physically compatible with existing stone are constantly being sought.

What constitutes a failure? A failure is not necessarily a total collapse causing damage or loss of life — these are extreme cases. And to analyse failures, it is first necessary to determine the function which the cladding of a building serves.