Academic literature on the topic 'Cement industry workers'
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Journal articles on the topic "Cement industry workers"
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Mazahir Elhadi Abdallah Mohammed Ali, Abdelaal Ali Hammad Ali, and Amna Hamid Imam Babeker. "Assessment of respiratory health effects of cement dust on the workers of Rabak cement factory." International Journal of Science and Research Archive 8, no. 1 (February 28, 2023): 819–125. http://dx.doi.org/10.30574/ijsra.2023.8.1.0125.
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Globally, the cement industry has been identified as a factor which causes significant pollution. This study is conducted to assess respiratory health effects of cement dust on the workers of Rabak cement factory, Sudan. This descriptive cross- sectional study was carried out at Rabak city. 134 samples were taken from the workers of the Rabak cement factory. The respiratory symptoms experienced, were scored and recorded using BMRC questionnaire on respiratory symptoms. The lung function measurements were performed using a portable Spirometer. The respiratory measurements of the subjects were Forced Vital Capacity (FVC), Forced Expiratory Volume in one second (FEV1) and Forced Expiratory Volume ratio (FEV1%). The results of the study showed that: the majority of the cement workers were infected by allergy. Cement dust might be the main cause of respiratory infection in exposed subjects. The duration of exposure to cement dust affects the prevalence of respiratory diseases among the cement workers. The present study clearly revealed that cement dust is not only the major cause of environmental pollution in the study area but also a threat to health of local inhabitants in addition to the worker. It has also been observed that majority of workers do not use personal protective equipment.
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Nasri, Sjahrul Meizar, Fiori Amelia Putri, Stevan Sunarno, Sifa Fauzia, and Doni Hikmat Ramdhan. "PM2.5 exposure and lung function impairment among fiber-cement industry workers." Journal of Public Health Research 12, no. 1 (January 2023): 227990362211489. http://dx.doi.org/10.1177/22799036221148989.
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Introduction: Numerous studies have reported respiratory impairment by exposure to fine particulate matter (PM2.5). However, limited studies investigated its effects on fiber cement roof workers. Thus, our study evaluated the impact of PM2.5 on pulmonary impairments among workers and its risk factors. Design and Method: A total of 131 fiber cement roof workers have been chosen based on the inclusive criteria. Size-segregated particles were measured in the workplace of workers. Interview and spirometry tests were obtained to determine the respiratory impairments. Result: The results showed the mean concentrations of PM2.5 had exceeded the WHO and US-EPA standards. A quarter of workers had lung restriction, lung obstruction, and mixed. Workers are most likely to have shortness of breath and wheezing. A significant correlation was found between smoking, production workers, and a long work period with abnormal lung function. Fiber cement roof workers are significantly at risk of exposure to PM2.5. They are most likely to acquire abnormal lung function due to PM2.5 exposure. Conclusion: Our study recommended the industry constantly maintain its programs. The industry should keep using the wet process to prevent dust generation and water suppression from preventing dust spread, as well as to wear respiratory protection for workers to avoid PM2.5 exposure. We recommended as well to the industry to implement follow-up programs for workers with abnormal lung function. Further action is needed to protect the workers’ occupational health in the fiber cement roof industry.
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Mansour, Ahmad Mohd, Hani Raed Qtaishat, Esraa Jawdat Samara, and Rawan Yahia Al Husamie. "Information Technology Practice in Cement Industry." WSEAS TRANSACTIONS ON BUSINESS AND ECONOMICS 18 (May 10, 2021): 855–64. http://dx.doi.org/10.37394/23207.2021.18.81.
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The aim of this paper was to examine the manner in which Lafarge, a multinational cement corporation, has gone about executing an IT-based strategy. The analysis was motivated by multiple concepts of strategy. Based on currently authorized company framework. The study was done to, evaluate the development process of the ICT-based growth plan for Lafarge cement and to analyse the issues encountered by Lafarge cement in integrating information and communication technologies as a strategic plan. A standardized questionnaire was used to collect the results. Descriptive figures were used to validate the data's results. The full text discovered that the application of ICT techniques was split down into many levels with numerous sections being allocated to separate divisions and departments. The key players in the development activities were the management who adopted the technologies, external experts and IT workers. There were several planks in the development process, e.g. restricted jobs of method. Because of this, it was not as successful for the lower levels of workers that the ICT approach tackled. It is advised that senior management reduce the amount of administration in the company to move more effectively. There is a need for senior and middle level management to be properly qualified in managing policy execution, and how to effectively deal with different cultures in the enterprise.
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Mekasha, Mahlet, Alemayehu Haddis, Tamrat Shaweno, and Seid Tiku Mereta. "Emission Level of PM2.5 and its Association With Chronic Respiratory Symptoms Among Workers in Cement Industry: A Case of Mugher Cement Industry, Central Ethiopia." Avicenna Journal of Environmental Health Engineering 5, no. 1 (June 13, 2018): 1–7. http://dx.doi.org/10.15171/ajehe.2018.01.
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In Ethiopia, occupation-related respiratory symptoms are extensively increasing with the expansion of cement manufacturing industries. However, little information is available on the extent of emissions and its association with chronic respiratory diseases. This study assessed the emission level of PM2.5 and its association with chronic respiratory symptoms among workers in Mugher Cement Factory, in 2018. A cross sectional study was employed on a total of 309 cement factory workers. Air check sampler, model 224-54, was used to measure the concentration of PM2.5. Variables with P value < 0.2 during bivariate analysis were selected as candidate for multiple logistic regressions. Significance level was set at P value <0.05. A total of 309 workers participated in the study with an overall response rate of 97%. The mean age of the respondents was 32.02 years (±4.7 SD). Emission levels of all PM2.5 samples were above the allowed standard. Among the workers, 50.8% had chronic respiratory symptoms and factors associated were: working in raw material receiving unit (adjusted odds ratio [AOR]= 7.5, 95% CI, 2.9, 19.4), cement milling unit (AOR = 2.4, 95 % CI ,1.2, 4.8), packing unit (AOR= 2.2, 95% CI= 1.1, 4.3), workers’ monthly income level below 3000 ETB (AOR; 5.8, 95% CI,1.9, 17.6), and workers’ regular medical checkup (AOR = 2.4, 95 % CI, 1.0, 5.2). The concentration level of PM2.5 and prevalence of chronic respiratory symptoms were high in the study area. Use of personal protective devices and periodic monitoring of installed pollution control devices is highly recommended.
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Andini, Riswanda Putri, and Mohammad Mirwan. "ANALISA TINGKAT KEBISINGAN TERHADAP PEKERJA PADA PROSES PRODUKSI INDUSTRI SEMEN." EnviroUS 1, no. 2 (March 9, 2021): 19–25. http://dx.doi.org/10.33005/envirous.v1i2.31.
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The cement industry in the new research plant was established for ± 5 years. The existence of this establishment certainly has negative impacts, one of which is the production of high-intensity / noisy sound. The noise in the cement industry comes from the cement production process where raw materials are processed into finished materials that are ready to be distributed to consumers. The noise will certainly have an impact on the surrounding workers. This study aims to show the very poor intensity of the processes that occur and to see the relationships that occur in communication, psychology, and worker physiology. The highest noise occurs in the raw factory area with a distance of 5 meters from the equipment where the intensity is 93.23 dB. Based on the Regulation of the Minister of Manpower of the Republic of Indonesia No. 5 of 2018, this exceeds the allowable threshold value of 85 dB with an exposure time of 8 hours. And responsive from workers who do not feel disturbed by what happened.
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G., Saji K., Zubair M., Sreelatha B. Nair, and Varghese P. R. "An epidemiological study on effect of occupational exposure of cement." International Journal Of Community Medicine And Public Health 5, no. 12 (November 24, 2018): 5105. http://dx.doi.org/10.18203/2394-6040.ijcmph20184734.
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Background: Construction industry chiefly depends on the cement. The constituents in the cement have various health effects in the exposed group. The present study focused to realize the health effects of cement exposure and duration of exposure.Methods: The sample size was 831 male workers. The labourers included were construction workers (masons, helpers and concrete mixers) and cement loading and unloading workers. They were categorized in to five groups which were 5-9, 10-14, 15-19, 20-24 and 25+ years based on the duration of exposure to cement. Health hazards among these labourers were categorized in to lung function impairment symptoms, cutaneous symptoms and other symptoms.Results: High frequency of respiratory tract ailments (persistent cough 54%, breathlessness 47%) was observed among loading workers as they were handling cement dust. Burning was the most observed one in concrete mixer (70%), hair loss and change in hair colour was observed in 60% of all categories of workers. Skin related ailments were more prevalent among masons, helpers and concrete mixers.Conclusions: The frequency symptoms had correlation with their nature of work in the construction industry. Prolonged exposure to hazardous substances will decline the efficiency of labourers by malfunctioning their physiological functions. Proper awareness about the hazardous substances and well taken precautions among these labours can enhance their efficacy and wellbeing.
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Rathore, Bhavishya, Namita Neelkanth, and Manju Toppo. "A study to assess the pulmonary functions in a cement ware house workers near railway station, Nishatpura, Bhopal." International Journal Of Community Medicine And Public Health 4, no. 9 (August 23, 2017): 3239. http://dx.doi.org/10.18203/2394-6040.ijcmph20173820.
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Background: It is unfortunate enough that cement industry workers despite of so many awareness campaigns, unable to seek protection against dust of cement and thus bound to face respiratory problems. In developing countries no legitimate bindings regarding protection of such workers though cement industry is one of the largest industries. Methods: Non probability sampling done in which cases taken from cement workers and control taken from nearby residents matched for age gender and smoking status of participants. Results: When studied for the restrictive and obstructive respiratory problems it was found 2.82 times and 4.71 times higher in cases respectively. When cases studied for duration of working against disease developed, it was found that 61.81% developed obstructive pulmonary disorder and proportion increased from 23.63% to 30.80 as the work span increased from 0-5 years to 5-15 years respectively. When it has been observed for restrictive pulmonary disorder, it has been increased from 3.6% to 5.4%. Conclusions: It has been observed that workers have either obstructive pulmonary dysfunction or normal pulmonary functions and on increasing the duration, number of workers with restrictive pulmonary function increases proportionately.
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Koh, Dong-Hee, Tae-Woo Kim, Seung Hee Jang, and Hyang-Woo Ryu. "Cancer Mortality and Incidence in Cement Industry Workers in Korea." Safety and Health at Work 2, no. 3 (September 2011): 243–49. http://dx.doi.org/10.5491/shaw.2011.2.3.243.
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Fridrichová, Marcela, Radek Magrla, Dominik Gazdič, and Jana Stachová. "FBC-Ash as a Substitute of Part Material Raw during Production of Portland Cement." Advanced Materials Research 1100 (April 2015): 11–14. http://dx.doi.org/10.4028/www.scientific.net/amr.1100.11.
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In the last years we have to think about the question of emission reduction. One of the biggest producer of these emission is industry, where the cement industry comes under it. The effort of cement-workers and other manufacturers of building materials is the reduction of harmful oxides in our air, including CO2, which is one of a group of unfavourable oxides.This paper deals with the study possibility of partial compensation limestone by FBC-ash. The expected effect is the reduction of CO2 emissions and saving limestone. Following the previous stage of the research a recipes were designed for Portland clinker burning limestone-based and FBC ash, it was carried out laboratory burning and on produced cements were made basic technological tests.
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E Lucena, Marcus Vinícius Peixoto Carvalho, Janaque Nunes Passinho, Sandra Cristina Serra Theodosio, Paulo Leonardo Santos Gouveia, Fernanda Costa Rosa, and Wolia Costa Gomes. "The Sustainable Benefits of Construction and the Perception of Cement Workers." Revista de Gestão Social e Ambiental 17, no. 7 (August 7, 2023): e03985. http://dx.doi.org/10.24857/rgsa.v17n7-027.
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Objective: The challenge of this work was to diagnose the sustainable benefits of civil construction and the perception of employees in a cement factory based on a new production methodology.
Method: The study was carried out through quantitative and cross-sectional research, with the application of a questionnaire via Google forms for employees and customers of the factory under study.
Results and conclusions: The sampling plan was 62.79% male, 58.14% married, 28.93% aged between 28 and 32 years old, 32% technical level, 11.63% post graduates and 22% of participants demonstrated understanding about sustainability. 77% of employees are unaware that the industry used a less aggressive production method for the environment, unique in Maranhão. We conclude that the industry under analysis has sought to implement good socio-environmental practices, but to achieve more expressive results, it needs to qualify and involve the entire production and consumption chain of the civil construction market with qualification programs, to guarantee the horizontalization of information with effective socio-environmental actions and thus preserving future generations.
Research implications: The research highlights the perception of workers/collaborators in the cement industry on the consumption and sale of products that minimize the negative effects on the environment.
Value of originality: This is original research that contributes to the understanding of the impact of the cement industry, during the production process, from the extraction of raw material. Since it degrades the environment by contaminating water and soil, it also interferes with human health, in addition to proposing the search to balance the negative socio-environmental impacts through cement production.
Dissertations / Theses on the topic "Cement industry workers"
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Chaves, Marcelo Antonio. "Da periferia ao centro da(o) capital : perfil dos trabalhadores do primeiro complexo cimenteiro do Brasil : São Paulo, 1925-1945." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/281764.
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Orientador: Michael McDonald HallDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciencias Humanas
O exemplar do AEL pertence a Coleção CPDS
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Resumo: A primeira grande fábrica de cimento do país, inaugurada em 1926, no bairro de Perus, em São Paulo, determina o recorte temático desta dissertação. As circunstâncias de sua instalação, a articulação com outros empreendimentos ¿ indústria de cal e transporte ferroviário -, a produção de uma mercadoria fundamental para a expansão urbana ¿ o cimento - e o singular processo de produção/trabalho da fábrica, introduzem a escrita. Entretanto, o enfoque privilegiado e articulador deste trabalho é a reflexão sobre os diversos aspectos da vida dos trabalhadores da fábrica e das pedreiras, onde o momento da produção e da reprodução da força de trabalho se confundem. Meu trabalho é fundamentado, principalmente, em fontes documentais primárias, destacando-se a exposição, cruzamento e análise de dados extraídos de 1500 fichas de trabalhadores. Assim, procuro identificar as condições de vida e de trabalho das primeiras gerações de trabalhadores da fábrica de cimento, entre os anos de 1925 e 1947: migração e imigração, nacionais e estrangeiros, negros e brancos, grau de instrução, salários, estabilidade no emprego, acidentes de trabalho, entre outros. Além de expor inúmeros dados empíricos que revelam mais detalhes daquele rico período da história do Brasil, nesta pesquisa, tem destaque também a conflituosa e ambígua trajetória de criação do primeiro sindicato dos trabalhadores, em 1933, buscando, através dela, problematizar e ilustrar a não menos ambígua e complexa história dos primeiros momentos de instalação do sindicalismo oficial no Brasil
Abstract: The first great cement factory of Brazil, inaugurated in 1926 in the neighbourhood of Perus, in São Paulo, determines the thematic focus of this dissertation. The circumstances of its construction, its articulation with other enterprises ¿ limestone industry and railroad transport -, the production of a basic element for the urban expansion - cement - and the singular production/work process of the factory open the writing. However, the main focus of this work is a reflection on the diverse aspects of the life of workers from the factory and from the quarries, where the moments of production and of reproduction of the work force blend in with one another. My work is based mainly in primary documentary sources, emphasizing the exposition, comparing and analysis of data extracted from 1500 worker¿s profile records. Thus, I try to identify the life and work conditions of the first generations of workers from the cement factory between the years of 1925 and 1947: migration and immigration; natives and foreigners; black and white; degree of instruction; wages; stability in the job; industrial accidents, among others. Besides displaying innumerable empirical data which disclose more details about that rich period of Brazil¿s history, this research also highlights the conflicting and ambiguous trajectory of the creation of the first workers trade union, in 1933, attempting through that to discuss and illustrate the not less ambiguous and complex history of the first moments of the institution of the official unionism in Brazil
Mestrado
Historia Social do Trabalho
Mestre em História Social do Trabalho
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Guimarães, André Gomes. "Coprocessamento de resíduos perigosos em uma indústria cimenteira no Brasil : a percepção dos trabalhadores e aspectos de saúde ocupacional." Master's thesis, 2015. http://hdl.handle.net/10400.2/4489.
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Dissertação de Mestrado em Cidadania Ambiental e Participação apresentada à Universidade AbertaO parque industrial cimenteiro brasileiro é formado por 85 unidades, onde 36 destas estão licenciadas para o coprocessamento. Em 2012, os resíduos coprocessados representaram a eliminação de um passivo ambiental de 1.320.000 toneladas. Desse montante, 38% foram utilizados como substitutos de matérias-primas, e os outros 62% como combustíveis alternativos. A taxa de substituição térmica no respectivo ano, decorrente do uso de combustíveis alternativos chegou aos 9%. Acredita-se que a capacidade nacional de coprocessamento possa atingir 2.500.000 toneladas/ano. Neste trabalho desenvolveu-se um estudo de caso numa fábrica de cimento que aplica o coprocessamento de resíduos perigosos, onde na primeira parte interpreta-se os dados recolhidos pelo inquérito aplicado (questionário) a 50 trabalhadores da respectiva cimenteira, a respeito da percepção desses indivíduos sobre questões ambientais, econômicas, sociais e de saúde, relacionadas à prática do coprocessamento, tais como: poluição, condições e segurança no trabalho, meio ambiente, saúde individual e coletiva, oportunidades de emprego, capacitação e treinamentos oferecidos pela empresa, coprocessamento de resíduos, transparência pública e participação ativa da população nos processos decisórios. Os resultados obtidos foram favoráveis, em sua maioria, com exceção dos aspectos relacionados ao conhecimento das pessoas em geral sobre a prática do coprocessamento, bem como da participação da população nos processos decisórios relacionados, os quais receberam respostas desfavoráveis. Já a segunda parte deste estudo, apresenta os dados referentes ao monitoramento biológico dos trabalhadores desta cimenteira brasileira que exercem suas atividades laborais diretamente no coprocessamento de resíduos, onde avaliou-se a exposição aos seguintes agentes químicos: fluoretos, manganês, mercúrio, níquel, estireno, etil-benzeno, fenol, tolueno e xileno. Nenhum dos resultados obtidos ultrapassou os respectivos limites biológicos de exposição preconizados.
The Brazilian cement industrial park consists of 85 units, where 36 of these are licensed for co-processing. In 2012, the co-processed waste accounted for the elimination of environmental liabilities of 1,320,000 tons. Of this amount, 38% were used as raw material substitutes, and the other 62% as alternative fuels. The thermal substitution rate in the current year due to the use of alternative fuels reached 9%. It is believed that the national co-processing capacity can reach 2.5 million tons / year. In this work it was developed a study case in a cement factory that uses the co-processing, where the first part interprets the data collected by the applied survey (questionnaire) to 50 workers of this industry about environmental, economic, social and health issues, related to practice of co-processing, such as: pollution, conditions and safety on work, environment, individual and collective health, employment opportunities, capacity building and training offered by the company, waste co-processing, public transparency and active participation of the population in decision-making. The results obtained were favorable, mostly, except for aspects related to the knowledge of the general public about the practice of co-processing as well as the population's participation in related decisionmaking processes, which received unfavorable responses. Already the second part of this study, presents data about the biological monitoring of workers of this Brazilian cement factory exercising their work activities directly in the waste co-processing, where was evaluated the exposure to these chemicals: fluoride, manganese, mercury, nickel, styrene , ethyl benzene, phenol, toluene and xylene. None of the results exceeded their biological limits recommended exposure.
Books on the topic "Cement industry workers"
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Maleck, Bernhard. Zementwerk Karsdorf: Die Geschichte des Zementwerkes Karsdorf von den Anfängen bis zur Gegenwart : aus Anlass der Gründung vor 80 Jahren im Jahre 1927. Berlin: P. Soberg, 2007.
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Development, Ontario Ministry of Skills. Cement finisher =: Finisseur béton. Toronto: Ontario Ministry of Skills Development, 1991.
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Mathiassen, Jakob. Beton: Historier fra skurvognen. København: Informations Forlag, 2011.
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Neiburg, Federico B. Fábrica y villa obrera: Historia social y antropología de los obreros del cemento. Buenos Aires: Centro Editor de América Latina, 1988.
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Đảng cộng sản Việt Nam. Đảng bộ nhà máy xi măng Hải Phòng. Ban cháp hành., ed. Lịch sử phong trào công nhân xi măng Hải Phòng, 1899-1955. [Hải Phòng]: Nhà xuá̂t bản Hải Phòng, 1991.
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Gabayet, Luisa. Obreros somos: Diferenciación social y formación de la clase obrera en Jalisco. Guadalajara, Jalisco, México: Colegio de Jalisco, 1988.
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Lasankin, Serey. Carbon neutralization of steelmaking, energy and cement industries. Silhouettes of the carbon-neutral industry. ru: INFRA-M Academic Publishing LLC., 2024. http://dx.doi.org/10.12737/2122427.
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The monograph examines the ROLL technology that allows solving the climate problem in the steelmaking, energy and cement industries. We are not talking about the exclusion of carbon from the technological process, but about the neutralization of the resulting carbon dioxide.
ROLL technology is based on the idea of producing several products from a single heating of raw materials, and the main tools are universal ROLL chambers that bring allied productions closer together in time and space. This reduces the energy intensity of the total product and directs the saved and produced energy to neutralize carbon dioxide.
It is intended for scientific and engineering workers, teachers, graduate students and students interested in this problem.
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Mathiassen, Jakob. Beton: Historier fra skurvognen. 2nd ed. København: Informations Forlag, 2011.
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Alberta. Alberta Advanced Education. Apprenticeship and Industry Training. Concrete finisher program. Edmonton, AB: Alberta Advanced Education, Apprenticeship and Industry Training, 2005.
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Sindicato Nacional da Indústria do Cimento (Brazil). 40 anos, 1953-1993. Rio de Janeiro, RJ, Brasil: O Sindicato, 1993.
Find full textBook chapters on the topic "Cement industry workers"
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Chakravarthi, Sarella, Galipelli Raj Kumar, and Sabavath Shankar. "Applications of Cement in Pavement Engineering." In Cement Industry [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94062.
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Recycled materials primarily Reclaimed Asphalt Pavement (RAP), and Recycled Concrete Aggregate (RCA) are produced from pavement rehabilitation and construction-demolition activities. Generally, these materials are utilized for landfills, parking lots, shoulders, and other places that are not environmentally friendly. The top layers of the pavement and concrete structures are constructed using superior qualities of aggregates that satisfy the specification. During their service life, the aggregates present in these structures undergo deterioration due to environmental and traffic factors. After reaching the end of their service life, the deteriorated structures are dismantled and considered as waste. Nevertheless, these recycled materials will have some retain value which can be used in different layers of the pavements in different percentages. The reuse of these materials in place of conventional aggregates preserves the environment and become a sustainable construction practice. Further, the direct utilization of these materials in the pavements may not satisfy the mechanical characteristics. To fulfill these gaps, cement stabilization of recycled materials is the best option. With this background, the proposed book chapter will highlight the usage of cement in pavement application, and a few types of research works carried in cement treated pavement layers will be discussed in a detailed and scientific manner.
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Zinad, Omar, Csilla Csiha, and Alya’a Abas Al-Attar. "Cost Analysis of Sustainable Concrete Production Using Waste Nanoparticles." In Társadalom – gazdaság – természet: szinergiák a fenntartható fejlődésben (Konferenciakötet), 585–93. Soproni Egyetem Kiadó, 2023. http://dx.doi.org/10.35511/978-963-334-450-7_s11_zinad_et_al.
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In building constructions, considering sustainability, there is an increased interest in a reduction in landfills, converting waste materials into nanomaterials by using for example waste materials like waste grain wheat, waste ceramic, and slag, decreasing thus also the price of production of concrete and enhancing the properties of construction products. This article will focus on using waste ceramic powder and blast furnace slag as replacements for cementitious materials. “Conventional concrete” (Cc) is produced by mixing 100% cement + sand + water whilst “Sustainable concrete” (Sc) is produced from a mix of sand + water + 47.5 % cement+ 50% of waste-based Supplementary Cementitious Materials (SCMs) consisting of 25 % of Waste Ceramic Powder (WCP) and 25% of Blast Furnace Slag (BFS) ) +2.5% of nano SiO2. This article makes an economic comparison between these two types of concrete, showing that whilst the cost of 1 m3 Cc is approximately 100 $, the cost of 1 m3 Sc is 60 $, having the same mechanical properties. By using Sc for construction works leads to saving huge quantities of raw material used for cement production. The economic evaluation showed savings in cost around 40% by partial substitution of cement with waste-based/reused cementitious materials, being a promising result for a sustainable construction industry.
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R, Arvind Saravan. "EXPERIMENTAL STUDIES TO ASSESS THE VIABILITY OF ZEOLITE POWDER AS A CEMENT PARTIAL REPLACEMENT." In Futuristic Trends in Construction Materials & Civil Engineering Volume 3 Book 2, 57–64. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bice2p3ch1.
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This study, conducted by This Works, explores the potential of zeolite powder as a substitute for cement in concrete compositions. Zeolite, known for its crystalline structure consisting of silicon, aluminum, and oxygen, demonstrates significant Pozzolanic activity and the ability to absorb carbon dioxide. The research evaluates the effectiveness of incorporating zeolite powder as a partial replacement for cement in M-40 grade concrete, considering proportions of 10%, 20%, 30%, and 40%. The concrete mixture adhered to the specifications outlined in IS 10262-2019. Various mechanical properties including compressive strength, tensile strength, and flexural strength were assessed at curing periods of 7, 14, and 28 days. The findings of these analyses are presented in this paper. Interestingly, concrete mixes containing 20% zeolite powder exhibited the best performance, displaying higher compressive, tensile, and flexural strengths. Additionally, non-destructive tests confirmed that the concrete met industry standards, highlighting the viability of zeolite powder-enhanced concrete.
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Dawson, Clive. "Legacy." In I Walked With a Zombie, 105–14. Liverpool University Press, 2023. http://dx.doi.org/10.3828/liverpool/9781837645169.003.0006.
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The success of I Walked with a Zombie cemented Lewton’s reputation with the RKO front office and allowed him the continued freedom to shape his future films as he saw fit, each of which pushed the boundaries of the genre in some way. However, his first two films also exerted an influence on the horror genre and the film industry more broadly, and various studios began emulating Lewton’s oeuvre. Similarly, Lewton’s films were seen as key works that also influenced the developed of the iconic film noir style during the 1940s, and they continued to act as a model for genre films throughout subsequent decades.
Conference papers on the topic "Cement industry workers"
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Workie, A. B. "Respiratory Symptoms and Lung Function Test Among Cement Industry Workers at Dangote and Mugher Cement Industries in Ethiopia." In American Thoracic Society 2024 International Conference, May 17-22, 2024 - San Diego, CA. American Thoracic Society, 2024. http://dx.doi.org/10.1164/ajrccm-conference.2024.209.1_meetingabstracts.a2876.
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Yunusa-Kaltungo, Akilu, Rukaiyatu Mohammed Jungudo, Srija Ray, and Idowu Sokunbi. "How Do Maintenance Personnel Perceive Occupational Safety and Health (OSH) Risks During Major Overhauls, Outages, Shutdowns or Turnarounds (MoOSTs)? An Examination of the Nigerian Cement Industry." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-89020.
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Abstract Asset management activities such as periodic overhauls are crucial for ensuring asset integrity and workplace safety. However, lessons learned from previous major industrial accidents across various high-risks industries have indicated that the perception of occupational safety and health (OSH) risks of maintenance personnel during major overhauls, outages, shutdowns and turnarounds (MoOSTs) are common denominators and precursors to several accidents. This is typically owing to several factors especially the fusion of all classes of routine maintenance tasks on enormous scales and the integration of a very diverse workforce (client, regulators, original equipment manufacturers, and various contracting firms) that possess very different safety cultures, which in turn compound overall risk profiles of job sites and the likelihood of accidents. Therefore, developing a good understanding of the risks perceptions and attitudes of MoOSTs workers towards can help improve overall OSH performance. Although several studies have investigated the subject of safety culture and climate in the context of projects especially engineering, procurement and construction (EPCs), however, studies and use cases on MoOSTs are significantly underrepresented, despite their impacts on costs, employment and wellbeing. This study therefore aims to advocate a safety culture that would boost OSH performance during MoOSTs through the development and deployment of safety climate questionnaire survey to MoOSTs workers of leading cement manufacturing operations in Nigeria. The study revealed “training and learning from incidents”, “commitment of senior management towards ensuring safety and its protocol deployment process”, and “effectiveness of incident reporting systems during MoOSTs” as the three main underlying safety climate factors.
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Alzaki, A., Nawaf S. Al-Shammari, Rodny Masoud Zuleta, and Alejandro De la Cruz Sasso. "Longest 9 5/8" Casing Cementing in ERD Well, A Worldwide-Record." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22082-ms.
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Abstract The efficient placement of cement as a verified barrier above a distinct permeable zone in any oil and gas well is a constant challenge faced by the industry. Absence of isolation behind the casing represents a deficiency to the required well integrity barriers. A compromised well barrier may result in casing corrosion, leaks, and eventually sustained casing pressure which might lead the loss of the asset and/or endanger the safety or workers and/or the environment. Ultimately, a compromised barrier implies compromised well integrity. Fluid displacement in ERD wells is different from conventional wells and the job conditions pose additional challenges. To ensure adequate cement placement in this ultra-ERD well, several challenges had to be addressed. Hence, an optimized cement placement method that focused on ECD management to prevent induced loss circulation included maintaining fluids displacement regimes, fluid density, and hydraulic friction hierarchy. Moreover, casing centralization was imperative. Limiting casing string movement once the string deployed successfully to bottom equally added to the challenge. A system's approach was utilized to achieve the level of optimization desired. Slurry rheology and fluid loss control were adjusted. A pumping schedulethat ensured that optimum displacement efficiencies were achieved in line with the designed rheology was used. The impact of pump rates on downhole ECD regimes were equally evaluated and confirmed to be fit-for-purpose. Mud conditioning prior to the cement displacement and spacer wettability were also of paramount importance. A centralizer spacing resulting in >70% stand-off was utilized. These optimized practices represented the results of 3D modeling used to understand the fluid dynamics, and its distribution under the influence of a horizontal static pipe. This work also presented a comprehensive sensitivity analysis not only on the effects of thermal thinning on fluid rheology, but also on gravitational forces acting on the fluids in an ERD well. After execution, a combination of cement bond logs, ultrasonic measurements, and advanced interpretation techniques were used to evaluate the cement bond quality. The logs showed an improved cement bonding with minimal to no channeling, and excellent radial cement coverage. As global hydrocarbon resources become harder to reach, ERD wells maybe required to access such subsurface targets. Adequate cementing well integrity is crucial to assuring the long-term integrity of such wells for the economic life of the assets. The practices implemented in this case history will contribute to expanding the tools and techniques available to engineers to achieving excellent barrier isolation in such wells.
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Ghazal, Abdallah, and Ida Karimfazli. "Off-Bottom Plug Placement: How It Works?" In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-19344.
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Abstract In Canada, the Alberta Energy Regulator’s (AER) liability report, issued in 2018, predicted that the number of inactive wells in the province will double by 2030. Despite the increase in the number of inactive wells, there is a need to close them properly to avoid hazards escape. Various aspects of well plug technologies in the Canadian abandoning industry are empirical. Many plugs are formed by injecting cement slurry into wells that are otherwise filled with fresh water for the slurry to build up on top of a water layer at a desired location. However, cement is heavier than water. Thus, successful plug placement following this methodology is questionable from the hydrodynamics perspective. The present study aims to identify features of successful processes for placement of off-bottom plugs. To that end, we investigate mixing of fluids of different densities as the denser fluid is injected into the lighter fluid. Cement slurry is modeled as a viscoplastic fluid. The fluid motion is governed by hydrodynamic models, and the two fluids (i.e. cement and water) are considered to be miscible and are allowed to mix. Systematic numerical simulations aim to reveal how the characteristics of cement and the well configuration affect the placement process. We show that successful plug placement depends on the formation of a mixed layer, of the wellbore fluid and cement slurry, below the injection site. We identify and provide representative cases of the processes promoting the formation of the mixed layer: high diffusion and growing instabilities.
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DuBois, Kristin, Joseph Pinkhouse, and Craig Enos. "Decarbonization and Implementation of Class L Cement for Top Hole Zonal Isolation." In SPE Eastern Regional Meeting. SPE, 2023. http://dx.doi.org/10.2118/215933-ms.
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Abstract Portland cement (the primary component in concrete) is the second most consumed product, globally, after water (Czigler 2020). With the sheer volume of cement that is produced each year, it should not be surprising that the manufacturing process ranks as the third largest industrial source of emissions and pollution in the world (EPA 2022). Specifically, cement plants emit a significant amount of carbon dioxide (CO2) through fuel consumption to generate heat and the unavoidable chemical process of calcination. An oilfield service company and a cement manufacturer partnered to propose and implement a reduced carbon cementing solution to a future-focused operator. The primary goals were to 1) create a cement which reduced CO2 emissions by 20–30%, and 2) replace previously used Class A slurries with Class L slurries, while maintaining or improving the cement performance properties. A new class of cement, Class L, was approved by the American Petroleum Institute (API) in 2019. This composite well cement is produced by intergrinding Portland cement clinker with one or more forms of gypsum, pozzolanic material (i.e., fly ash, silica fume, and natural pozzolans), as well as particle suspension aids. The cement manufacturer began working to create a Class L cement that would meet the same performance requirements as Class A cement while targeting substantial CO2 emissions reduction. The oilfield service company worked with the cement manufacturer over the course of two years to refine the product and evaluate it for oilfield application. Cement lab testing including thickening time, compressive strength, free water, fluid loss, transition time, and rheology evaluations were conducted on both the base Class L cement and designed slurries. Class L cement slurries were first implemented for this Appalachian Basin operator in late September 2022 and have since been utilized on more than 200 casing strings as of July 2023 across multiple operators. The cement manufacturer has reported a 23% reduction in CO2 emissions by switching to the production of Class L cement from Class A within the same facility. Lab generated performance data of the base Class L cement and corresponding slurries are very similar and, in some cases, better than the original Class A slurries. To-date, more than 100 jobs have been successfully executed for this operator using Class L cement slurries, delivering both zonal isolation and well-integrity. As the oil and gas industry focuses more on our Environmental, Social and Governance (ESG) impact, the pathway that the cement manufacturer has paved is pivotal. Class L cement is a viable alternative to both API Class A and ASTM Type I/II cements utilized in well construction, while reducing CO2 emissions during manufacturing by 23%.
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Kazmi, S. Ali Abbas, and M. Zahir Khan. "Power generation by different waste heat recovery methodologies with reference to cement works in Pakistan: A case study for cement industry in Pakistan." In 2012 International Conference on Emerging Technologies (ICET). IEEE, 2012. http://dx.doi.org/10.1109/icet.2012.6375473.
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Palisch, Terry, and Jeremy Zhang. "A Novel Method to Detect Cement through Direct Measurement – Case Histories." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206019-ms.
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Abstract Cement quality is typically determined through the use of sonic logging tools, more commonly known as cement bond logs (CBLs), or more recently ultrasonic imaging tools (USITs). In general, these tools have served the industry well over time, but with the advent of new and exotic cement blends, as well as multistage cement jobs in today's unconventional horizontal wells, the quality and even location of the cement has become more problematic for basic CBL/USIT tools to detect. In addition, these tools are ineffective through multiple uncemented casing strings. A novel method to detect cement was developed as an offshoot of a technology used for detecting proppant in hydraulically fractured wells. This technique uses a non-radioactive tracer which exhibits a high thermal neutron capture cross section that is then incorporated into the proppant grains during manufacture. The proppant can then be detected using standard neutron-logging tools, at any time during the well's life. By incorporating small volumes of this detectible proppant into the cement slurry, the cement can then be detected using the same logging tools. This leads to identification of the top of cement, as well as the cement quality. If desired, the taggant can be staged such that the top and bottom of a cement stage can be detected. This paper will first review the industry concerns with cement detection. It will then discuss the principles and theory behind how the taggant works, both for basic proppant detection, as well as the novel application as a vehicle for cement detection. This will also include lab testing showing no impact of the tagged proppant on cement performance. The authors will conclude by presenting several case histories of cement detection, including two horizontal well applications, one each in the Permian and Canada. A third case history will also be presented in which the cement was detected through multiple strings of uncemented casing, to verify success of a cement squeeze in a surface casing remediation. This new technique allows for cement detection in wells in which conventional CBL/USITs are difficult to interpret, including detection of exotic cement blends, and through multiple strings of casing. This allows for more confidence in cement isolation, particularly in today's unconventional wells, where isolation of uphole formations is critical. This paper will be useful for drilling and completion engineers who are concerned with their ability to confirm cement quality, as well as production engineers who must perform remedial cementing operations.
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Cheung, Henry, C. H. Yan, Chris Cheung, and Anthony Wong. "Deep Cement Mixing –The Experience in Tung Chung East Reclamation and Challenges Ahead." In The HKIE Geotechnical Division 42nd Annual Seminar. AIJR Publisher, 2022. http://dx.doi.org/10.21467/proceedings.133.30.
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Reclamation has been the most tenable land supply in the interest of the public. Today, around 27% of Hong Kong people are living on reclaimed land formed in the past decades. Over the past few decades, reclamation methods and ground treatment techniques have been advanced to meet the technical requirements and social acceptance at different times. In response to the increasing environmental awareness of the public, non-dredged reclamation methods in association with Deep Cement Mixing (DCM) has been introduced in Hong Kong. Tung Chung East (TCE) reclamation, as one of the ongoing projects adopting this novel technology, has showcased a role model on assimilation and adaptation of this new technology in tackling ever changing challenges in the construction industry. The success of the project markedly attributes to the application of this new ground treatment technique. In this paper, some background and geotechnical considerations for the adoption of DCM method and design approach in TCE reclamation will firstly be discussed. To date, majority of the DCM works have been completed and the reclamation works have been proceeding well. With the experience acquired and construction data collected at the site specific DCM trial embankment as well as during the construction stage, the merits and benefits of DCM method, in terms of both stability and settlement control, will be highlighted. More importantly, there has been a lot of precious experience upon construction and the project team has ironed out all these hurdles through adaptation of this technology on site. There is no doubt that the documentation of all the experience in TCE reclamation could become a great reference for the development of a local guidance for practitioners in Hong Kong and upcoming mega development projects.
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Allapitchai, M. Shahril Majid, Ahmad Luqman Johan, El Khalil Mohamed M’Bareck Heboul, Sattiyaraju Sellapan, William Sin Yoong Liew, Ahmad Hafizi Ahmad Zaini, Mohd Hairi Abdul Razak, and M. Yuzmanizeil Yaakub. "Annulus Perforate, Wash and Cement : Establishing Barrier Verification Process for Deepwater Subsea Wells Abandonment and Its Lessons Learnt." In SPE Symposium: Decommissioning and Abandonment. SPE, 2021. http://dx.doi.org/10.2118/208492-ms.
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Abstract Wells plug & abandonment was carried out in a deepwater field (Field C) offshore West Africa. There were 15 deepwater subsea wells, in this field. Thirteen of the wells were completed with Open Water Vertical Xmas Tree (OXT) while remaining two were completed with Enhanced Vertical Xmas Tree (EVXT). All the wells were permanently abandoned with permanent barriers established in accordance to Norsok D-010, rev. 2013. This involved establishing well barriers which would both horizontally and vertically effective. The operator evaluated several methods in establishing well barriers for the permanent abandonment purpose of these 15 wells. The barriers placement for areas with good annulus cement were straightforward as an internal cement plug could be spotted as a permanent barrier. For this particular field, it is noted that all of the 15 wells have hydrocarbon bearing and permeable formations above the top of expected annulus lead cement which is designed basically to manage ECD during cementing job rather than giving good annular isolation. Due to this, it is important for the operator to employ the best technique that could establish a permanent cement barrier both inside the casing and in the annulus at the same time. Operator learned that Section Milling was the widely accepted method to establish barrier in cases where there is poor cement or the annulus cement is not present particularly in land and offshore wells. However, this technique poses severe operational risk especially in a deepwater operation mode. Upon review, it was determined that Perforate, Wash and Cement (PWC) technology has been proven and it would become a valuable technique in establishing well barrier which complies with abandonment requirement as per the industry guidelines. High risk activities for deepwater operations such as section milling could be avoided by employing this method. Nonetheless, the Perforate, Wash and Cement (PWC) technology has its own set of risks especially with its method of establishing the well barrier immediately upon setting it. This involves drilling and re-logging the well immediately after setting the cement in annulus to prove the barrier. Upon discussion with PWC contractor, it was agreed that the verification technique may create additional hazards as it could jeopardize the integrity of the installed barrier in the annulus. The additional requirement for cement verification process will also prolong the project duration, hence is an additional cost to the project too. Operator worked together with the Perforate Wash and Cement (PWC) Contractor and Well Examiner to determine the best verification method for PWC plugs with the objective to comply with regulation on cement verification while at the same time, resulting in most cost-efficient and time-efficient operation. The establishment of Element Acceptance Criteria as an alternative Barrier Verification Process for PWC technology is necessary to improve the reliability of the system as well as reducing associated risks. In total, 18 PWC operations were successfully carried out throughout the campaign. An extensive after action review was conducted at the completion of each job to capture the valuable lessons learnt. These lessons learnt are shared in this paper as well which could add value for future operations with similar settings. It is expected that this paper will serve as a reference in the establishment of Element Acceptance Criteria as well as its implementation during the P&A campaign. It is hoped that the lessons learnt shared in the paper could assist other Operators on planning for similar campaigns in the future.
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Brašnjić, Benjamin, and Dean Osmanović. "INFLUENCE OF THE CHEMICAL COMPOSITION OF LIMESTONE ON THE DEVELOPMENT OF MINING WORKS IN QUARRY." In GEO-EXPO 2021. DRUŠTVO ZA GEOTEHNIKU U BOSNI I HERCEGOVINI, 2021. http://dx.doi.org/10.35123/geo-expo_2021_6.
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There are only a few limestone mines in Bosnia and Herzegovina that provide the mineral raw material for industrial production. As a result, the experience in planning and designing such quarries is lesser than in designing the quarries for construction. Limestone from "Vijenac" deposit is an industrial mineral raw material, which is used for the production of soda (light, heavy and bicarbonate), cement, nitrogen fertilizer named "KAN", and is also used in construction and road construction. The use of limestone as a mineral raw material in industrial production requires more attention to the chemical composition of limestone than to the physical-mechanical characteristics. The paper presents a solution to this problem by creating a block of models of exploitation reserves of limestone, which enables foresight of the chemical composition of limestone, both in each floor partially and during the period of exploitation. The block model was created on the basis of the updated state of works, the projected contour of limestone surface mine and the exploration works' database. The block model uses the following: CaCO3, CaO, SiO2, Al2O3, Fe2O3, bulk density, category of reserves and the purpose of the mineral raw material, i.e. for industry or construction. The block model analysis has determined that the northern part of the mine, from the floor E-612.5 to E-525 meters a.s.l., does not meet industrial requirements in terms of chemical composition of limestone. Therefore, limestone from this part of the surface mine will be used for construction purposes. These quantities of limestone are about 2.6x106 m3. Limestone from the southern part of the surface mine meets the industry requirements. Its quantities are about 8.47x106 m3.