Industrial Wastes as Alternative Mineral Addition in Portland Cement and as Aggregate in Coating Mortars

Oliveira, Kamilla Almeida; Nazário, Bruna Inácio; Oliveira, Antônio Pedro Novaes de; Hotza, Dachamir; Raupp-Pereira, F.

doi:10.1590/1980-5373-mr-2016-1139

Cited by 9 publications

(9 citation statements)

References 18 publications

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“…Due to the presence of reactive silicates and calcium carbonate in PPFA, it can be substituted as a supplementary cementitious material for more environmentally friendly cement/clinker manufacturing [89]. Moreover, it is useful as a partial replacement for cement and small aggregates in building concrete [90][91][92][93][94]. The development of alternative value-added geomaterials from PPFA for mortar/concrete manufacturing demands a comprehensive study of rheological properties and the mechanical performance of the new composite material [91].…”

Section: Supplementary Cementitious Materials In Construction Industrymentioning

confidence: 99%

“…Moreover, it is useful as a partial replacement for cement and small aggregates in building concrete [90][91][92][93][94]. The development of alternative value-added geomaterials from PPFA for mortar/concrete manufacturing demands a comprehensive study of rheological properties and the mechanical performance of the new composite material [91]. Further, PPFA can be agglomerated through a pelletization technique and postprocessed (by sintering, autoclaving, and cold-bonding) in order to attain a desired strength for use as a light-weight aggregate for various applications in the Sustainability 2019, 11, 4394 9 of 16 construction industry [18].…”

Section: Supplementary Cementitious Materials In Construction Industrymentioning

confidence: 99%

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Pulp and Paper Mill Fly Ash: A Review

Cherian

Siddiqua

2019

Sustainability

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The continual growth of pulp and paper industry has led to the generation of tremendous volumes of fly ash as byproducts of biomass combustion processes. Commonly, a major part of it is landfilled; however, updated environmental regulations have tended to restrict the landfilling of fly ash due to rising disposal costs and the scarcity of suitable land. The pulp and paper industries are therefore urgently seeking energy-efficient mechanisms and management for the beneficial use of fly ash in an ecological and economical manner. This paper offers a comprehensive review of existing knowledge on the major physicochemical and toxicological properties of pulp and paper mill fly ash to assess its suitability for various bound and unbound applications. The current state of various methods used for the valorization of pulp and paper mill fly ash into more sustainable geomaterials is briefly discussed. This paper also presents promising and innovative applications for pulp and paper mill fly ash, with particular reference to agriculture and forestry, the construction and geotechnical industries, and the immobilization of contaminants. It was identified from a literature review that modified pulp and paper mill fly ash can be environmentally and economically advantageous over commercial coal-based fly ash in various sustainable applications.Sustainability 2019, 11, 4394 2 of 16 use of compost products, etc., are drawbacks of composting [10]. Contaminant-free PPFA has great significance as a soil liming agent and fertilizer in agriculture and forestry [6,11]; however, its direct application requires safety precautions due to its undesirable handling and spreading characteristics and associated health risks [12,13]. Further, high pH and electrical conductivity values of pore water in wood ash might have perturbing effects on the microbial community [14]. In order to withstand extreme conditions, the bacteria may enter a dormant stage, thereby decreasing the microbial population and diversity and ultimately disturbing the ecological balance. PPFA and value-added materials also have multifunctional engineering applications, such as supplementary cementitious material (SCM) in concrete systems, aggregate in pavement construction, binder for soil stabilization, and adsorbent for the immobilization of toxic heavy metals [15][16][17][18][19][20][21][22][23]. Based on a statistical survey conducted on the management and utilization of boiler ashes generated at Canadian pulp and paper mills, it was reported that more than 50% of ash is landfilled, 20-25% is used as a soil amendment (direct application or compost), and less than 20% is used for other beneficial applications such as the construction of embankment fills, the stabilization of pavement layers, and the solidification of wastes. [1,2].This paper reviews the existing knowledge on physicochemical and toxicological properties of PPFA in order to assess its suitability as a sustainable geomaterial for various bound and unbound applications. The bound applications of fly ash in...

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Section: Supplementary Cementitious Materials In Construction Industrymentioning

confidence: 99%

Section: Supplementary Cementitious Materials In Construction Industrymentioning

confidence: 99%

Pulp and Paper Mill Fly Ash: A Review

Cherian

Siddiqua

2019

Sustainability

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“…From the DTG thermogram it is possible to identify a constant behavior in the mass of the material, that is, without loss of mass until the temperature of 750 °C, where it is observed a loss of mass of 2.4%, due to a possible thermal decomposition of the calcite, promoted by the gas release carbon dioxide (CO 2 ). The thermal decomposition of the calcite (CaCO 3 ) occurs from 700 ºC, with phase transformation at 850 ºC, resulting in the formation of lime (CaO) and CO 2 release and the relationship between the calcite mass loss (CaCO 3 ) and the decomposition of the organic matter occurs between the temperatures of 350 ºC and 800 ºC 14,45,46 .…”

Section: Characterization Of Cement and Wastementioning

confidence: 99%

“…Thus, several researchers studied technical feasibility for the incorporation of different residues in the production of mortars, aiming at the partial replacement of the cement, which is the most important agglomerant in the production of the mortar. Among them, they evaluated the use of marble residues 13,11 , eggshell powder 8 , waste paper and cellulose, as well as construction and demolition industries for application in cement-based materials 14 , biomass residue from a pulp and paper mill 15 , heavy ash obtained from the combustion of mineral coal 16 , biomass ash 17 and sewage sludge 18 . These articles aim to contribute to the sustainable development by making greater use of industrial residues in the civil construction as mortars 12 and concrete 19 .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Mechanical Properties of Sealing Mortar with Partial Replacement of Portland Cement by Stone Crusher Waste

et al. 2019

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Civil construction is one segment responsible for major environmental and social impacts. Among its raw materials, Portland cement, which is produced by the burning and subsequent grinding of a composition of clays and limestones. This manufacturing process causes great environmental damage, both by the exploitation of deposits and by the process of clinkering (burning of raw materials), which emits a significant amount of CO 2 in the atmosphere. Therefore, there is a need for research on materials that reduce these impacts on the environment and that can be used by civil construction to the partial replacement of cement. Thus, this research had as objective to produce settlement mortar through the partial replacement of the Portland cement by filler powder, in different proportions and to study its mechanical properties. The results show that the partial replacement of the cement by the residue has acceptable behavior in the mortar.

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“…al. (94) em sua caracterização do resíduo de lama de cal também encontrou calcita como fase cristalina presente no material.…”

Section: Difratometria De Raios X Do Resíduo De Lama De Calunclassified

Utilização do resíduo Lama de cal na dessulfuração de ferro-gusa.

Silva¹

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de Albuquerque pela ajuda desde a graduação.À Minha Mãe Dona Neusa pelo apoio e incentivo.À minha esposa Tatiana pelo carinho, paciência, compreensão e pelo Amor.Ao meu querido Professor Santana (in memória) por todos os momentos de aprendizado não só acadêmicos como aprendizados da vida.Ao meu tio Genaro dos Santos (in memória) por sempre me incentivar.Ao meu amigo Alex Cerqueira pelo incentivo e apoio e demonstração de amizade.Aos amigos do Larex, em especial, Victor Bridi e Eduardo Junca.Ao Professor Dr. Douglas Morais pelo incentivo.A todos aqueles que de alguma forma colaboraram diretamente ou indiretamente.A todos que de alguma forma contribuirão. Muito obrigado. RESUMOO desenvolvimento da indústria siderúrgica passa pela necessidade de otimização de processos e pela utilização insumos alternativos. Dessa maneira, o aproveitamento de resíduos provenientes de outros setores produtivos para a formação de escórias sintéticas pode ser visto como uma possibilidade quanto à procura de novos materiais e rotas de reutilização dos resíduos. Sendo assim, este trabalho tem como objetivo estudar a utilização do resíduo lama de cal, proveniente da indústria de papel e celulose na formação de escórias sintéticas dessulfurantes, na etapa de dessulfuração do ferro-gusa. Inicialmente o resíduo foi caracterizado utilizando as seguintes técnicas de análise: medição de umidade, análise química, análise granulométrica, análise de perda de massa, microscopia eletrônica de varredura (MEV) e análise de espectroscopia por energia dispersiva (EDS). Os resultados da caracterização apontam que aproximadamente 90% das partículas do resíduo lama de cal estão abaixo de 44µm e na análise química foi constatado que o resíduo possui uma parcela de 55,12% de CaO. Posteriormente, foram realizados os ensaios de refino em escala laboratorial, em temperaturas de 1450°C, 1500°C e 1550°C, sendo todos experimentos realizados sem agitação mecânica. As amostras foram retiradas por meio de amostradores à vácuo, sendo em seguida feitas análises de variação de enxofre. Com a utilização do software FactSage foram quantificadas as parcelas de fase sólida e fase líquida presentes nas misturas. Pode ser constatado que o aumento de temperatura favorece o processo de dessulfuração por se tratar de uma reação endotérmica. Além disso, o aumento de fluorita das composições das escórias, também aumenta a eficiência de dessulfuração.Sendo assim o resíduo lama de cal apresentou-se apto para a utilização em escórias sintéticas dessulfurantes.

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Industrial Wastes as Alternative Mineral Addition in Portland Cement and as Aggregate in Coating Mortars

Cited by 9 publications

References 18 publications

Pulp and Paper Mill Fly Ash: A Review

Pulp and Paper Mill Fly Ash: A Review

Evaluation of Mechanical Properties of Sealing Mortar with Partial Replacement of Portland Cement by Stone Crusher Waste

Utilização do resíduo Lama de cal na dessulfuração de ferro-gusa.

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