High-Strength Construction Material from Raw Bauxite Residue by One-Step Alkali Activation

Mare, Michael Di; Ouellet‐Plamondon, Claudiane

doi:10.1007/s40831-022-00633-6

Cited by 3 publications

(7 citation statements)

References 14 publications

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“…A recently published process to prepare high strength AAMs out of bauxite residue and fly ash used mechanical milling to mix raw filter-pressed bauxite residue with the alkali activators [16]. Bauxite residue possesses the challenging property of a crystalline nature that leads to low reactivity.…”

Section: Methodsmentioning

confidence: 99%

“…To combat this, some studies use thermal or chemical treatments to transform bauxite residue into an amorphous solid before the material as a precursor [12,23,24]. However, in the chosen method for this study, the bauxite residue is used with no pre-treatment, possibly reducing the energy required in processing [16].…”

Section: Methodsmentioning

confidence: 99%

“…Life cycle thinking cementitious materials in the construction of over 28 MPa [16,21,22]. New research is directed to incorporating the material in industrial applications and assessing its economic and environmental viability [6].…”

Section: Chemistymentioning

confidence: 99%

“…AAMs garnered research interest since their production requires temperatures between ambient and 100°C and they develop strength comparable to cement [14]. These materials have applications ranging from use as an alternative to certain building materials, like cement and brick, in the construction industry, to displaying adsorbing properties in wastewater management [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Environmental assessment of materials in preparing alkali-activated materials using bauxite residue

Guha,

Bambier,

Ouellet-Plamondon

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Aluminum is a highly produced metal globally. In the built environments alone, aluminum is known for its light weight and anti-corrosive properties and is a common choice of material in window frames, curtain walls, and light fixtures. The metal is processed from its oxide, alumina, the production of which releases a caustic byproduct known as bauxite residue (BR). BR is stored in massive reservoirs, however, due to the sheer volume of production, industries handling the material are reaching their storage limits. It is of high importance to research methods to valorize BR. Researchers have proposed a multitude of valorization methods, which include metal recovery from the byproduct, and using BR as raw material in production of another material. However, it is counterproductive to expend considerable amounts of energy and use excessive raw materials to manage utilization of BR. This study compared a method of valorization of bauxite residue with clay bricks. The method of preparing alkali-activated materials (AAM) with bauxite residue as a precursor was semi-quantitatively analyzed to compare the raw materials in the AAM with clay bricks. The materials were analyzed for climate change, ozone depletion, human toxicity, and aquatic ecotoxicity using OpenLCA software and the ecoinvent version 3.4 database. While the alkali activators possessed high values of the environmental impact when measured by the kilogram, the impacts were greatly reduced due to their small percentage in weight contained in the AAM. This study is the first stage of analyzing the environmental costs of valorizing bauxite residue. The AAM showed low environmental impact in material use when impacts of toxicity are considered. However, it displayed a higher climate change impact than that of clay bricks. Transport of raw materials to the preparation site played a significant role in the analysis. The next step is to compare the energy used in preparing AAMs.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Chemistymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmental assessment of materials in preparing alkali-activated materials using bauxite residue

Guha,

Bambier,

Ouellet-Plamondon

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Inorganic nonmetallic micro/nanomaterials have been widely used in structural materials and functional materials owing to their excellent properties, such as biomedicine, aerospace, optoelectronics, environmental protection and building materials. [153][154][155] However, the process of synthesizing inorganic nonmetallic micro/nanomaterials by conventional methods may be dangerous, complex, and time-and reagent-consuming. Further, external reaction parameters must also be considered because they play a key role in the uniform reaction for the fine synthesis of micro/nanomaterials.…”

Section: Synthesis Of Micro/nanomaterials By Microreactorsmentioning

confidence: 99%