Low Environmental Impact Cement Produced Entirely from Industrial and Mining Waste

Carvalho, José Maria Franco de; Campos, Paula Anunciação Matias; Silva, Keoma Defáveri do Carmo e; Silva, Guilherme Jorge Brigolini; Pedroti, Leonardo Gonçalves; Peixoto, Ricardo André Fiorotti

doi:10.1061/(asce)mt.1943-5533.0002617

Cited by 21 publications

(3 citation statements)

References 31 publications

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“…It is important in cements with high initial strength but in carefully controlled quantities [ 53 , 54 ]. Carvalho et al [ 55 ] noted that mayenite is acceptable in belitic cements, since it could result in the same increase in the initial mechanical strength.…”

Section: Resultsmentioning

confidence: 99%

Production of Belite Based Clinker from Ornamental Stone Processing Sludge and Calcium Carbonate Sludge with Lower CO2 Emissions

et al. 2022

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Environmental concerns have come to the forefront due to the substantial role of the cement industry in the extraction and expenditure of natural resources. Additionally, industrial processes generate a considerable amount of waste, which is frequently disposed of inadequately. The objective of this study was to evaluate the simultaneous use of ornamental rock processing sludge and calcium carbonate sludge generated from the kraft process in the production of belitic clinker. These waste materials would be used in total or partial substitution of natural raw materials, namely, limestone and clay. Several formulations were produced and sintered at 1100 and 1200 °C. The raw materials were characterized physico-chemically and thermogravimetrically, with subsequent evaluation of the resulting dosed raw mixes. Mineral analyses determined that the mixtures with limestone and clay in substitution ratios of 95% and 100%, respectively, and sintered at 1100 °C have the potential to produce belite-rich clinkers. This temperature is considerably lower than those reported in reference studies. Additionally, full limestone and clay substitution could result in a 23.92% reduction in carbon dioxide in clinker production. The results confirmed the potential use of ornamental rock processing sludge and calcium carbonate sludge as viable alternative materials for cement production and, consequently, could contribute to a reduction in the negative environmental impacts of this industry.

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Section: Resultsmentioning

confidence: 99%

Production of Belite Based Clinker from Ornamental Stone Processing Sludge and Calcium Carbonate Sludge with Lower CO2 Emissions

et al. 2022

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“…6 Iron ore tailings (IOT) have been widely studied in recent years as a blend material for conventional ordinary Portland cement (OPC)-based composites and alkaliactivated-based composites as fine aggregate, filler, raw material for clinker production, and as a precursor for alkali-activated materials. [7][8][9][10][11][12] Research has been done about the use of mine tailings to develop alkali-activated materials for application as construction and building materials [13][14][15] ; however, there is a scarce number of studies using the IOT in alkali-activated composites, as well as using the IOT as the main precursor to the alkali-activation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of alkali‐activated iron ore tailings blended with metakaolin

Silva

Barbosa

Ferreira

et al. 2023

Int J Applied Ceramic Tech

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In this study, synthesis, microstructural characteristics, mechanical properties, and environmental compatibility of alkali‐activated binders derived from iron ore tailings (IOT)—with partial replacement with metakaolin (MK)—were investigated. The binders were produced with a NaOH solution, IOT, and MK. A thermal cure at 100°C was used and the MK was applied as a partial replacement of IOT in three proportions (10, 20, and 30 wt%). The IOT‐based specimens presented an average of 98.0 and 18.0 MPa at 7 days age of curing for compressive and flexural strength, respectively. The mechanical properties of the alkali‐activated binders with MK decreased as the substitution ratio increased. By the microstructural analysis, it was found a zeolite‐type phase in alkali‐activated IOT, while in the binders blended with MK, three new mineral phases were identified. Furthermore, Fourier transform infrared, quantitative X‐ray diffraction, and environmental analysis suggest that the Fe species present in IOT acted in the alkali‐activation reaction.

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“…Ever-increasing waste production in nature has led researchers to use waste materials in different fields so that disposal of industrial wastes in nature would be greatly reduced [13,14]. There are many possibilities to use waste materials in civil engineering applications [15,16]. Cement which is vastly used in almost in all civil engineering applications is manufactured from natural resources such as chalk or limestone heated at very high temperatures by using large amounts of energy from natural resources.…”

Section: Introductionmentioning

confidence: 99%

Performance of Using Waste Marble Dust for the Improvement of Loose Sand in Deep Soil Mixing

Alnunu

Nalbantoğlu

2021

Arab J Sci Eng

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The use of waste materials in soil stabilization is very important in terms of recycling of waste materials and reducing environmental pollution. The aim of this study is to investigate the effective use of waste marble dust, WMD in deep soil mixing, which is one of the ground improvement techniques used for problematic soils. In this study, loose sand was mixed with cement and different proportions of WMD. First, soil-binder mixtures were formed by using cement as a binder material and then cement was replaced by different percentages of WMD. Series of tests were performed to evaluate the effect of WMD on the mechanical properties of the mixtures, such as unconfined compressive strength, stress-strain behavior, toughness, modulus of elasticity and resilient modulus. Ultrasonic pulse velocity (UPV) test was also carried out on the specimens. The specimens were also examined under a microscope to investigate the pore spaces and surface bonds. In addition, setting time and bulk density of the specimens were studied. The optimum replacement percentage of WMD was found to be (10) at a binder-soil ratio of (20). Reuse of WMD in deep soil mixing is promising and will provide significant cost saving and environmental protection.

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Low Environmental Impact Cement Produced Entirely from Industrial and Mining Waste

Cited by 21 publications

References 31 publications

Production of Belite Based Clinker from Ornamental Stone Processing Sludge and Calcium Carbonate Sludge with Lower CO2 Emissions

Production of Belite Based Clinker from Ornamental Stone Processing Sludge and Calcium Carbonate Sludge with Lower CO2 Emissions

Synthesis and properties of alkali‐activated iron ore tailings blended with metakaolin

Performance of Using Waste Marble Dust for the Improvement of Loose Sand in Deep Soil Mixing

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