Influence of the heterogeneity of waste from wet processing of ornamental stones on the performance of Portland cement composites

Almada, Bruna Silva; Melo, Luciane de Souza; Dutra, Julia Baptistella; Bubani, Larissa Cardoso; Silva, Guilherme Jorge Brigolini; Santos, White José dos; Aguilar, Maria Teresa Paulino

doi:10.1016/j.conbuildmat.2020.120036

Cited by 27 publications

(16 citation statements)

References 54 publications

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“…The density obtained from the comminuted material was 4.04 g/cm³, higher than conventional cements (≈ 3.17 g/cm³) (Almada et al, 2020). However, it is close to the IOT studied (Zhao et al, 2014;Campanha, 2014).…”

Section: Chemical and Mineralogical Analysis Of Mining Tailings And Csupporting

confidence: 68%

Influence of Addition Contents of Iron Ore Tailings on Structural Mortar

Castro¹,

Almada²,

Fajardo³

et al. 2021

JMS

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This study discusses and analyzes an alternative of IOT reuse as addition in structural mortars, evaluating the influence of IOT addition contents. The material was physically and chemically characterized. Structural mortars were molded with 10%, 20%, 30% and 40% of addition of IOT in relation to cement mass. We investigate physical properties, mechanical indicators, durability indicators and microstructure. The tailings are composed of predominantly quartz, hematite and goethite, and no components were found that could compromise the cementitious composites. The addition of IOT provided a tendency to reduce open porosity. The addition of 30% IOT was the most efficient in closing pores. All addition contents led to the maintenance or gains in mechanical properties, and a 10% gain in flexural tensile strength was observed for the addition of 10% IOT. The addition of 40% IOT promoted a 14% gain in compressive strength and maintenance of flexural tensile strength. This addition content evidences that the carbonation depth was not significantly affected. Based on the results, the addition percentages of 30-40% are interesting as to the analyzed properties.

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Section: Chemical and Mineralogical Analysis Of Mining Tailings And Csupporting

confidence: 68%

Influence of Addition Contents of Iron Ore Tailings on Structural Mortar

Castro¹,

Almada²,

Fajardo³

et al. 2021

JMS

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“…Similar results were reported by Arif et al [1], which evaluated concretes with sandstone slurry as partial replacement of the total aggregates, i.e., coarse and fine aggregates. Concerning the influence of other ornamental stone wastes as an OPC partial replacement on the water absorption of cement-based materials, few studies have evaluated this property [51][52][53]. Rashwan et al [51] observed an increase in water absorption and porosity with increasing the replacement amount of OPC by marble and granite in concretes.…”

Section: Compressive Strength Resultsmentioning

confidence: 99%

“…The authors found that at 28 days, the water absorption increased were between 2.7% and 47.4% compared to the control mix. Almada et al [52] evaluated 20% cement replacement by ornamental stone waste with varied compositions in cementitious composites. The authors reported that although the water absorption by immersion at 28 days increased between 6.7% and 17.1% with the waste incorporation, the values obtained are within the limit for good quality concrete.…”

Section: Compressive Strength Resultsmentioning

confidence: 99%

Effect of Ornamental Stone Waste Incorporation on the Rheology, Hydration, Microstructure, and CO2 Emissions of Ordinary Portland Cement

et al. 2022

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The ornamental stone industry generates large amounts of waste thus creating environmental and human health hazards. Thus, pastes with 0–30 wt.% ornamental stone waste (OSW) incorporated into ordinary Portland cement (OPC) were produced and their rheological properties, hydration kinetics, and mechanical properties were evaluated. The CO2 equivalent emissions related to the pastes production were estimated for each composition. The results showed that the paste with 10 wt.% of OSW exhibited similar yield stress compared to the plain OPC paste, while pastes with 20 and 30 wt.% displayed reduced yield stresses up to 15%. OSW slightly enhanced the hydration kinetics compared to plain OPC, increasing the main heat flow peak and 90-h cumulative heat values. The incorporation of OSW reduced the 1-, 3-, and 28-days compressive strength of the pastes. Water absorption results agreed with the 28 days compressive strength results, indicating that OSW increased the volume of permeable voids. Finally, OSW incorporation progressively reduced the CO2 emission per m3 of OPC paste, reaching a 31% reduction for the highest 30 wt.% OSW content. Overall, incorporating up to 10 wt.% with OSW led to pastes with comparable fresh and hardened properties as comported to plain OPC paste.

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“…Currently, most industrial processes are sources of waste, causing major environmental degradation and compromising sustainable development (Cox et al, 2014;Almada et al, 2020). The current challenge concerns the rational use of waste arising from that system (Aliabdo, Elmoaty & Auda, 2014;Ashish, 2018, Almada et. al., 2020.…”

Section: Introductionmentioning

confidence: 99%

Optical Fiber Waste Used as Reinforcement for Concrete with Recycled Marble Aggregate

Barbosa¹,

Santos²,

Ludwig³

et al. 2021

JMS

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Sustainable development in the 21st century depends on the reuse of materials and products, as well as on economic and environmental incentives for recycling. Several studies have sought to improve the quality of concrete, as well as its durability and strength, by adding fibers (metallic, polypropylene, carbon, vegetables) or by replacing the aggregate. The use of optical fiber waste in concrete is still incipient and few studies address the use of marble aggregate to be used in concrete. This research assesses the behavior of the mixture composed of: Portland cement + fine aggregate (sand from crushed marble waste) + coarse aggregate (gneiss) + optical fiber waste and water. The compressive strength, the tensile strength and the modulus of elasticity of concrete and the durability of optical fiber waste in alkaline composite were tested through microstructural evaluation. The results present an increase of about 20% in the mechanical properties and a reduction in the rigidity of the mixture, making the material more ductile. The superficial protection of the fibers made them more resistant to the alkaline attack of the cement. The knowledge acquired would allow the creation of sustainable concrete reinforced with optical fiber in a much more efficient way.

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Influence of the heterogeneity of waste from wet processing of ornamental stones on the performance of Portland cement composites

Cited by 27 publications

References 54 publications

Influence of Addition Contents of Iron Ore Tailings on Structural Mortar

Influence of Addition Contents of Iron Ore Tailings on Structural Mortar

Effect of Ornamental Stone Waste Incorporation on the Rheology, Hydration, Microstructure, and CO2 Emissions of Ordinary Portland Cement

Optical Fiber Waste Used as Reinforcement for Concrete with Recycled Marble Aggregate

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