Waste-containing clinkers: Valorization of alternative mineral sources from pulp and paper mills

Simão, Lisandro; Jiusti, Jeanini; Lóh, N.J.; Hotza, Dachamir; Raupp-Pereira, F.; Labrincha, J.A.; Montedo, Oscar Rubem Klegues

doi:10.1016/j.psep.2017.03.038

Cited by 59 publications

(18 citation statements)

References 26 publications

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“…Essas alterações possivelmente foram causadas pelas diferentes características químicas dos clínqueres, das matérias-primas utilizadas e das condições de moagem [44]. A variação dos elementos cálcio e silício no cimento interfere diretamente nas fases anidras C 3 S e C 2 S, nas quais uma maior concentração de cálcio leva a uma produção preponderante de alita, principal responsável pelas fases hidratadas C-S-H e Ca(OH) 2 [45]. Além disso, a relação Ca/Si também tem influência na composição química e microestrutural do C-S-H, prolongando suas cadeias com elevação da sílica e/ou a maior difusão de cálcio ou álcalis interlamelares na elevação do cálcio [46,47].…”

Section: Resultsunclassified

Cinza de biomassa rica em calcário como material carbonático em sistemas cimentícios de base Portland

et al. 2019

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Resumo O uso de materiais alternativos, em substituição ao clínquer, tem sido amplamente estudado, a fim de reduzir custos e minimizar os danos ambientais causados pela produção do cimento Portland. Investigou-se a influência do uso da cinza de algaroba (Prosopis juliflora), material rico em carbonato de cálcio, nos mecanismos de hidratação e formação das principais fases hidratadas do cimento Portland. As características físicas e químicas das matérias-primas foram avaliadas. Composições com 5%, 10% e 15% de cinza de algaroba foram analisadas e comparadas com o cimento Portland comercial com fíler calcário (6-10%), CPII-F. A cinza de algaroba é um potencial fíler alternativo para aplicação em sistemas cimentícios de base Portland, atuando de forma semelhante ao fíler calcário em termos de nucleação da fase C-S-H, estabilização da etringita e tendência à formação de carboaluminatos.

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Section: Resultsunclassified

Cinza de biomassa rica em calcário como material carbonático em sistemas cimentícios de base Portland

et al. 2019

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“…Compositional adjustments using the Bogue equations were performed in order to control the crystalline phases after thermal processing. In this sense, F1 and F5 had a greater tendency to form belite and alite phases, respectively [2]. The formulations were fired in a bottom loading furnace (ME 1700/V/Eg, Fortelab) in two steps (decarbonation and clinkering).…”

Section: Methodsmentioning

confidence: 99%

“…limestone and clay) used in clinker production [1,2]. This is mainly due to the high concentration of major oxides (CaO [3][4][5][6], SiO 2 [7][8][9][10], and Al 2 O 3 [1,2]) present in such wastes, which are required for the formation of desirable crystalline phases in the clinker (C 3 S, C 2 S, C 3 A and C 4 AF) [11]. Works [12] demonstrated that this method of waste recovery is technically and environmentally feasible, and reported that high alkali content (Na 2 O + K 2 O) is a major issue in the end product.…”

Section: Introductionmentioning

confidence: 99%

Thermal characterization of hydrated eco-friendly clinkers produced from pulp and paper mill waste

et al. 2018

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Industrial wastes from pulp and paper mills are potentially useful materials to use as alternative materials in clinker production. In this study, eco-friendly clinkers were obtained using only waste as feedstock. Eco-friendly clinker with different C 3 S and C 2 S contents were produced and hydrated for 7 days at 40 °C, or for 28 and 90 days at room temperature. The potentialities of these waste and the products obtained were revealed through chemical (XRF), thermal (DTA/TG) and surface area (BET) analysis. For comparison, a common ordinary Portland cement (OPC) was tested. As expected, the hydration rate of formulations presenting higher C 3 S content was higher, generating higher amounts of Ca(OH) 2 . Furthermore, the amount of Portlandite formed was lower when compared to OPC. Keywords: pulp and paper mill waste, clinker, hydration, portlandite. Resumo Os resíduos do setor de papel e celulose são potenciais para serem usados como materiais alternativos na produção de clínqueres. Neste estudo, ecoclínqueres foram obtidos utilizando apenas resíduos como matéria-prima. Ecoclínqueres com diferentes teores de C 3 S e C 2 S foram produzidos e hidratados por 7 dias a 40 °C, ou por 28 e 90 dias em temperatura ambiente. As potencialidades destes resíduos e dos produtos obtidos foram reveladas através de análise química (FRX), térmica (ATD/TG) e de área superficial (BET). Para comparação, um cimento Portland comercial (OPC)

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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].…”

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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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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Waste-containing clinkers: Valorization of alternative mineral sources from pulp and paper mills

Cited by 59 publications

References 26 publications

Cinza de biomassa rica em calcário como material carbonático em sistemas cimentícios de base Portland

Cinza de biomassa rica em calcário como material carbonático em sistemas cimentícios de base Portland

Thermal characterization of hydrated eco-friendly clinkers produced from pulp and paper mill waste

Pulp and Paper Mill Fly Ash: A Review

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