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The purpose of this study is to fit an appropriate mathematical model to express response variables as functions of the proportions of the mixture components. One purpose of statistical modeling in a mixture experiment is to model the blending surface such that predictions of the response for any mixture component, singly or in combination, can be made empirically. Testing of the model adequacy will also be an important part of the statistical procedure.

A series of mortar using air lime, marble and ceramic sanitary waste aggregates were prepared for statistically designed combinations. The combinations were designed based on the mixture-design concept of design of experiments; this mortar is often used as a filler material in restoration projects. The aim of this work is to find an optimal composition of a paste for the manufacture of air lime mortar with ceramic and marble waste. This investigation aims to recommend mix design for air lime-based mortar, by optimizing the input combination for different properties, and to predict properties such as mechanical strength, thermogravimetric and x-ray diffraction analysis with a high degree of accuracy, based on a statistical analysis of experimental data.

This paper discusses those mortar properties that architects, contractors and owners consider important. For each of these properties, the influence of ceramic and marble waste in the air lime mortar is explored. The flexibility of lime-based mortars with waste materials to meet a wide range of needs in both new construction and restoration of masonry projects is demonstrated.

The objective of the present investigation is to recommend mixture design for air lime mortar with waste, by optimizing the input combination for different properties, and to predict properties such as compressive strength, flexural strength with a high degree of accuracy, based on the statistical analysis of experimental data. The authors conducted a mixture design study that takes into account dependent parameters such as the constituents of our air lime-based mortar where we have determined an experiment matrix to which we have connected the two responses, namely, compressive and flexural strength. By introducing the desirability criteria of these two responses, using JMP software, we were able to obtain a mixture optimal for air lime mortar with ceramic and marble waste.

Solid wastes are today one of the worst problems in the word, mainly because of the increase in volume and the high capacity of environmental contamination. The aim of this work is to analyze the possibility of use sawing granite wastes as alternative ceramic raw materials for the production of bricks and roof tiles. Samples were collected from wastes of several granites companies from the northeast region of Brazil. They were submitted to particle size and mineralogical characterization. Some ceramic compositions were prepared with granite waste and submitted to technological tests. The results indicated that the wastes have particle size distribution and mineralogical composition similar to conventional non‐plastic ceramic raw materials. These wastes can be used in substitution of conventional raw materials in ceramic formulations in proportions up to 50 per cent. This can be important to save traditional raw materials from the region and decreasing the aggression to the environment.

Traditional ceramic industries (ceramic tiles, frits, glazes and pigments) generate solid wastes, wastewater and gas emissions that have different characteristics depending on the type of product made. The present study was undertaken to define a series of test methodologies for characterising each type of waste. The approach involved defining the elements to be analysed in each kind of sample, subsequently carrying out the respective test methods for the determinations in terms of type of parameter and sample. In gas emissions, the study addressed fluorine compound analysis. In liquid samples, AAS and ICP‐OES techniques were compared, validating the methods by using reference materials and participating in CALITAX and AQUACHECK intercomparison rounds on wastewater analysis. In solid samples, ICP‐OES and XRF techniques were compared, validating the methods by participating in International Proficiency Tests of Analytical Geochemistry Laboratories (GEOPT‐7, GEOPT‐8 and GEOPT‐9). The selective electrode determination of fluorine in gas emissions yields good results. The study shows that toxicity can be determined in liquid and solid samples by the bioluminescence assay. In liquid samples, good results were found for metal elements analysis by AAS and ICP‐OES, the latter being better. Finally, in solid wastes the ICP‐OES technique has advantages in analysing minor elements compared with XRF, whereas XRF is more suitable for analysing major elements, as it is a faster, more reproducible technique.

This study aims to develop geopolymer concrete (GPC) using manufactured sand (M-sand) and recycled concrete aggregate (RCA) under different curing conditions. GPC is a sustainable construction material developed with industrial waste products such as fly ash to eliminate the use of cement in the production of concrete. GPC requires heat curing for the attainment of early age strength. The development of GPC under heat curing conditions is a hard process in practice. To overcome such circumstances, an attempt was made to develop the GPC under different curing conditions with the aid of coarse aggregate (CA) and RCA. The influence of different curing conditions on strength gain and microstructural characteristics of GPC is investigated. Mechanical properties of GPC such as compressive strength, tensile strength, flexural strength and elastic modulus are reported and discussed.

This study focuses on the assessment of mechanical and microstructure characterization of eco-efficient GPC developed with natural CA and RCAs. The required optimum quantity of binder, alkali activator, alkaline liquid to binder ratio and aggregates was determined by appropriate trials. Three types of curing methods, namely, ambient, oven and water, were used for the development of GPC mixes. Following the properties of RCA, it is realistic to substitute up to 40% of coarser aggregates as the resulting aggregate mix falls within the requirements of the analyzed mix.

Special attention is required for the mix with RCA because the mix’s consistency is affected by the high water absorption of the RCA mix. GPC specimens cured at ambient and water conditions exhibited marginal variation in the compressive strength for both CA and RCA. The compressive strength of GPC mixes prepared with RCA was marginally higher than that of the GPC made with CA under different curing regimes. RCA can be used as a sustainable material in lieu of CA in GPC.

The main significance of this research work is to develop the optimal mix design with appropriate mix proportion. The present study proposes a satisfactory methodology that enhances the mechanical strength of GPC as the guidelines are not available in the standards to address this problem. Effective use of waste materials such as fly ash and recycled aggregate for the development of GPC is another major research focus in the proposed investigation.

This paper aims to analyse the behaviour of dune sand mortars with the addition of ceramic waste. The objective of improving the performance of these modified mortars was evaluated in terms of accelerated carbonation performance.

The effect of these recycled materials was studied in an experimental programme through several tests. The carbonation depth was determined using a classical phenolphthalein test. The mass fractions of Ca(OH)₂ and CaCO₃ were calculated using thermogravimetric analysis, water absorption occurring through capillary action and open porosity, and the mechanical characteristics were measured after subjecting the materials to wetting–drying cycles.

The results show that using ceramic waste provides better performance in terms of water absorption by capillary action, open porosity and carbonation penetration.

This research is a study of the incorporation of ceramic waste up to 10 per cent in dune sand mortar. The choice of using ceramic waste to produce dune sand mortars has benefits from economic, environmental and technical points of view and offers a possibility for improving the durability of mortars.

The purpose of this paper is to conduct the directed synthesis of blue-colour aluminate spinel pigments based on spent aluminium–cobalt–molybdenum (ACM) catalyst and to study peculiar features of mineral formation processes and changes in their colour indices depending on composition and firing temperature.

Aluminate spinel ceramic pigments with specified colour indices were synthesised by directed formation of their mineral composition and identification of the most rational technological parameters of production. Mineral composition of synthesised pigments was evaluated by X-ray phase analysis. The colour indices of pigments and pigment-containing glaze coatings were studied on the comparator colour. The chemical resistance of pigments was determined by loss of their weight loss after boiling in 1 N hydrochloric acid solution and 1 N sodium hydroxide solution.

Peculiar features of formation of the mineral composition of aluminate spinel pigments based on the ACM catalyst were studied. The expediency of using magnesium and zinc oxides in their composition has been proved. It is found that for the formation of stable pigments of intense blue colour, a concentration of cobalt (II) oxide in the amount of 0.5 mol is sufficient, which is 23.1 Wt.%. The colour of such pigments is determined by the ratios of cobalt, magnesium and zinc aluminates, which form a spinel solid solution.

The use of developed aluminate spinel pigments provides obtaining of high-quality glass coatings of blue colour, in particular, for ceramics.

Aluminium oxide in the spent ACM catalyst is predominantly in the active form (of amorphous aluminium hydroxide and y-Al₂O₃). This is a prerequisite for the use of this waste material as a complete substitute for chemically pure Al₂O₃ in the technology of aluminate spinel pigments and reduction of their firing temperature. Besides, spent ACM catalyst already contains 5 Wt.% of expensive cobalt (II) oxide in the form of stable colour-bearing phase CoAl₂O₄.

The purpose of this paper is to explore how sustainability can become a source of competitive advantage for mature manufacturing sectors where technologies are standardized, and innovation is mainly generated across the value chain and not by individual companies.

From the methodological point of view, this research estimates the sustainability status of ceramic production in the Sassuolo district (Italy), using the Life Cycle Sustainability Assessment (LCSA) model, and changing the observation point for the analysis, from the enterprise (micro level) to the entire sector (meso level).

This paper provides an analysis of the environmental, economic and social impacts of the four main types of ceramic tiles manufactured in Italy, both in aggregate terms for the entire sector and per square meter of product.

The methodological approach used in this research is easy to replicate both for companies when designing their sustainability strategies and for public decision makers when assessing the sustainability performance of a sector or supply chain.

For the first time, a socio-economic impact assessment is proposed for the ceramic sector, conducted in parallel with the environmental impact assessment through stakeholder mapping and prioritization.

This paper conceptualizes the theme of relations and interdependencies between ceramic producers organized in industrial districts and the territories in which they operate in order to determine empirically the sustainability performance of Italian ceramic sector, using the LCSA model with a territorial extension that presupposes an innovative contribution to current literature and practice.

The purpose of this paper is to compare environmental performance of two shackle insulator manufacturing enterprises in India by evaluating and quantifying the life cycle environmental impacts in these enterprises using ISO 14040 guidelines.

All relevant life cycle phases – raw material, manufacturing, transportation and disposal – are considered. Primary inventory data for the two enterprises are collected through observations of processes at the sites. Ecoinvent 3.0 database is used as secondary data source. Process flow models are developed using Umberto software. ReCiPe impact assessment methodology is adopted to calculate environmental impacts in terms of endpoint categories of ecosystem quality, human health and resource availability; and midpoint categories of climate change, fossil depletion, human toxicity, metal depletion, ozone depletion, terrestrial acidification and water depletion.

This study has found that manufacturing phase followed by raw material extraction and transportation phases are responsible for most of the environmental impacts. This study also found that raw materials used in glaze preparation (manganese and ferrite), electricity, heavy fuel oil (C-9) and cotton have high environmental impacts in the manufacturing phase.

The limitation of this study is that most of the inventory data are collected from only two manufacturing plants.

The researchers/enterprises can use the knowledge body for modelling and result comparison under different conditions. The enterprises can do the micro analysis of environmental effects of processes to improve environmental as well as economic performance. The government agencies can use the data for policy development and deployment.

The main contribution of the research is the creation of a knowledge body in the area of ceramic product environmental impacts. The paper provides inventory for the life cycle assessment (LCA) of shackle insulators using primary source (measured values) as no secondary data source is available for the shackle insulators. The inventory and results of this study can be used as reference for the future LCA studies in ceramic industry.

This paper aims to analyze the impact of the capabilities and strategies of the actors (micro-dynamics), learning process and networks (meso-dynamics) and institutions (macro-dynamics) in the evolution of the Brazilian ceramic clusters. Based on these experiences, managerial and policy implications are suggested.

Main data were gathered through 22 in-depth face-to-face interviews with managers and industry experts. The data were complemented by documentary analysis, including brand documents, descriptions of internal processes and Brazilian and international ceramics magazines and journals. In addition, the authors also use information from the previous experience of the authors who have been studying the sector for more than 15 years.

The paper provides empirical insights about the main characteristics of the evolution of two main Brazilian ceramic tiles clusters, as well as how there are different patterns of evolution among them. The results of this paper show that Brazilian ceramic tile clusters do not necessarily follow the life cycle model of their dominant industry, by proving evidence that different clusters in the same industry can follow different evolutionary paths.

This paper shed light on a multi-level approach (micro, meso and macro) of dynamics of the clusters and how it impacts the cluster’s life cycle. The micro-dynamics dimension was analyzed by the capabilities and strategies of local ceramic tile manufacturers. The meso-dynamics are being considered the localized learning processes, especially from those that arise from interactions, collaboration and networks carried by local and foreign suppliers. The macro-dynamics were considered by the role of local demand, factors conditions, institutions, historical legacy in the clusters’ emergence along with path dependence mechanisms.

The paper includes implications for both clusters to promote innovation, particularly to keep and create market and technological leadership through the establishment of partnership between firms and clients, regulators and research centers and universities are crucial for innovation.

This paper fulfils an identified lack of attention regarding the under-appreciation of the context-specific issues such as the capabilities of the actors, networks and institutions that may influence the long-term development of clusters.

This paper examines the development of green skills across firms located in an institutional context, specifically the national education and skill-formation system, of the under-researched developing country of Thailand.

This paper qualitatively explores the Thai education and skill-formation system and conducts a cross-case analysis of four firms across different industries in Thailand. The empirical findings in this paper draws on semi-structured interviews with various stakeholders; field visits to vocational colleges, universities, a nongovernmental organization (NGO) and firms across industries both in Bangkok and in other provinces in Thailand; and a review of archival documents and web-based reports and resources.

This paper proposes that firms across industries in Thailand must be responsible for helping their employees/workers obtain the green knowledge and skills necessary to perform green jobs through high-road human resource (HR) practices in response to the fact that the Thai education and skill-formation system is unlikely to produce a sufficient number of employees/workers who have green knowledge, skills and abilities and are industry-ready to perform green jobs, leading to a shortage of employees/workers who possess green skills in the labor market. Specifically, curricula in vocational colleges and universities in Thailand are not likely to respond to the needs of firms in producing those employees/workers.

The limitations of this research concern its methodology. This research is based on the qualitative studies of the Thai education and skill-formation system and a case study of firms across industries in Thailand. Thus, this paper does not aim to generalize the findings to all other countries but to enrich the discussion on the effects of macro-level HR policies on the creation of green jobs and the development of green skills across firms in each country. Additionally, it is difficult to gain access to firms across several industries and various stakeholders to understand the development of green skills among employees in these firms. The reasons are resource constraints, time constraints and the hesitation of firms in permitting the author to access the data. These difficulties have restricted the sources of information to construct a more nuanced picture of firms across various industries in developing green skills among their existing employees. Consequently, this research does not include firms in several other industries, including the pulp and paper industry, textile and garment industry, plastic industry and agri-food industry. Thus, future research may extend the topic of the development of green skills among employees to these industries. Quantitative studies using large samples of firms across industries may also be useful in deepening the understanding of this topic, which is significant from the perspectives of the strategic human resource management (SHRM), comparative institutional perspectives on HR strategies and practices, and green economy.

This paper also provides practical implications for top managers and/or HR managers of firms in Thailand, other developing countries and other emerging market economies with deficiencies in the national education and skill-formation system. First, the top managers and/or HR managers can apply various methods to internally develop managers and employees/workers with the appropriate environmental/green knowledge and necessary skills to perform green jobs. The methods include classroom training, on-the-job training, coaching, mentoring systems, job shadowing and being role models for younger generations of employees. Second, these top managers and/or HR managers can cooperate with vocational colleges and/or universities in their countries to design educational programs/curricula related to environmental/green management to be able to produce graduates with suitable qualifications for their firms. These managers can request for assistance from universities in their countries when their firms confront sophisticated questions/problems related to environmental/green management. In this regard, universities will have an opportunity to solve real environmental/green problems experienced by industries, while firms can appropriately and accurately solve environmental/green questions/problems. Third, these top managers and/or HR managers can encourage their firms to apply for certificates of green-/environmentally friendly products or carbon footprint labels from NGOs to foster a green image among firms' consumers. These applications require the firms to pay special attention to the cultivation of green awareness and the development of green skills among their employees. Fourth, these top managers and/or HR managers can encourage their employees to express green-/environmentally friendly behaviors as well as sufficiency-based consumption behaviors. In fact, these top managers and/or HR managers can foster their employees to reduce energy consumption, including electricity and water, to conserve these types of energy for young generations. Fifth, these top managers and/or HR managers can adopt and implement green human resource management (GHRM) practices consisting of green recruitment and selection, green training and development, green performance management, green pay and rewards and green employee relations in their firms to upgrade both the environmental and social performances of firms. Finally, these top managers and/or HR managers must take serious actions regarding the implementation of environmental/green management policies and practices within their firms in order to facilitate the movement of the country toward the bioeconomy, circular economy, and green economy (BCG economy).

This paper provides social/policy implications for the government, vocational colleges and universities in Thailand, other developing countries and emerging market economies where the skill shortage problem is still severe. First, the government of each country should incorporate green/environmental policies into the national education policy and the long-term strategic plan of the country. Second, the government should continuously implement such national policy and strategic plan by encouraging government agencies, vocational colleges, universities, firms and NGOs to cooperate in developing and offering environmental/green management educational programs/curricula to produce graduates with suitable qualifications for those firms. Third, the government should encourage vocational colleges and universities to equip their students with green skills to be industry-ready in a real working context. Fourth, to alleviate the skill shortage problem in the labor market, the government should foster firms, especially private sector firms, to focus on the upskilling and reskilling of their existing employees. With this action, their existing employees will have green skills, be able to effectively perform green jobs and become an important driver to help the country move toward the BCG economy. Fifth, the government of each country should encourage firms to develop green-/environmentally friendly products by offering them various types of incentives, including tax reductions or tax exemptions. Sixth, the government should encourage universities in the country to sign a memorandum of understanding with leading research institutes and world-class digital technology companies such that these institutes and/or companies admit high-potential university students to work as trainees/entry-level employees for a certain duration. This action can ultimately facilitate knowledge transfer from these institutes and/or companies to those university students who will finally return to work in their home country. Seventh, the government, especially the Ministry of Education, should encourage vocational colleges and universities to teach students in the environmental/green management program based on real case studies/problems found across firms. In this way, graduates should be industry-ready to perform green jobs. Finally, the government must pay serious attention to the implementation of environmental/green management policies across levels within the country so that the transition of the country toward the BCG economy will finally come true in the future.

This paper contributes to the SHRM, comparative institutional perspectives on HR strategies and practices, and the literature on the green economy and the development of green skills in firms in the following ways. First, this paper focuses on examining how the institutional context of Thailand shapes the development of green knowledge and skills among employees across firms in Thailand. In this regard, the paper aims to fill the gap in the literature on strategic HRM and comparative institutional perspectives on HR strategies and practices as proposed by Batt and Banerjee (2012) and Batt and Hermans (2012), who suggested that the literature on strategic HRM should go beyond the organizational context and examine how firms adopt and implement HR practices in response to the national institutional context. Second, the paper aims to extend the literature on the green economy regarding the roles played by institutional factors in shaping the development of green knowledge and skills across firms. Finally, strategic HRM, comparative institutional perspectives on HR strategies and practices and green economy studies have overlooked the under-researched country of Thailand. Most studies in these three areas focus more on developed countries. Thus, the findings of this paper should extend the literature on those areas regarding the development of green skills among employees across firms in response to the Thai institutional context.