Recycling of lithium slag as a green admixture for white reactive powder concrete

Li, Jinzhen; Huang, Shaowen

doi:10.1007/s10163-020-01069-4

Cited by 33 publications

(33 citation statements)

References 36 publications

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“…Zhao et al [ 22 ] used LS as a mineral admixture to replace cement, and the results showed that it can densify the microstructure of the concrete interface transition zone (ITZ), reduce internal porosity, and improve the aggressiveness of chloride ions and sulfates. Li et al [ 23 ] also showed that the incorporation of lithium slag can increase the hydration reaction, produce hydrated calcium silicate gel (C-S-H), fill the internal pores, and improve the porosity and macrostructure of concrete. The high SO 3 content in LS limited its high proportion to replace cement [ 24 ], and the addition of LS as a supplementary cementitious composite material would adversely affect the early strength [ 25 ], but Tan et al [ 26 ] found that the early strength of cement slurry could be improved by wet grinding of LS.…”

Section: Introductionmentioning

confidence: 99%

Compression stress-strain curve of lithium slag recycled fine aggregate concrete

Chen,

Liang,

2024

PLoS ONE

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As one of the key materials used in the civil engineering industry, concrete has a global annual consumption of approximately 10 billion tons. Cement and fine aggregate are the main raw materials of concrete, and their production causes certain harm to the environment. As one of the countries with the largest production of industrial solid waste, China needs to handle solid waste properly. Researchers have proposed to use them as raw materials for concrete. In this paper, the effects of different lithium slag (LS) contents (0%, 10%, 20%, 40%) and different substitution rates of recycled fine aggregates (RFA) (0%, 10%, 20%, 30%) on the axial compressive strength and stress-strain curve of concrete are discussed. The results show that the axial compressive strength, elastic modulus, and peak strain of concrete can increase first and then decrease when LS is added, and the optimal is reached when the LS content is 20%. With the increase of the substitution rate of RFA, the axial compressive strength and elastic modulus of concrete decrease, but the peak strain increases. The appropriate amount of LS can make up for the mechanical defects caused by the addition of RFA to concrete. Based on the test data, the stress-strain curve relationship of lithium slag recycled fine aggregate concrete is proposed, which has a high degree of agreement compared with the test results, which can provide a reference for practical engineering applications. In this study, LS and RFA are innovatively applied to concrete, which provides a new way for the harmless utilization of solid waste and is of great significance for the control of environmental pollution and resource reuse.

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Section: Introductionmentioning

confidence: 99%

Compression stress-strain curve of lithium slag recycled fine aggregate concrete

Chen,

Liang,

2024

PLoS ONE

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“…Lithium-slag glass structure is a polymeric network structure composed of a silicate polyhedron formed after roasting and smelting, and it belongs to the SiO 2 -Al 2 O 3 -CaO slag system [18]. Lithium-slag has pozzolanic activity and is a reusable industrial waste product that is widely used as a cement additive [19].…”

Section: Introductionmentioning

confidence: 99%

Solidification Experiment of Lithium-Slag and Fine-Tailings Based Geopolymers

Dai¹,

Zeng²,

et al. 2023

Sustainability

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Based on the pressure of environmental protection, more and more scientific researchers are trying to reuse aluminum–silicon-rich industrial wastes. In this study, activated lithium-slag and lead–zinc tailings were used as raw materials to prepare geopolymers at ratios of 3:7, 1:1, and 7:3. These geopolymers were initially cured for 12 h at 25 °C, 50 °C, 75 °C, and 100 °C and were then cured at room temperature to the specified ages. The compressive strength of each group of geopolymers was tested at the ages of 3 days, 7 days, and 28 days. The optimal group of samples was selected, that is, those with a ratio of lithium-slag to lead–zinc tailings of 7:3 and an initial curing temperature of 75 °C. After that, the heavy metal leaching test and porosity analysis test were carried out on the optimal group of samples, and the curing effect was considered to meet the requirements of the Chinese specifications. In addition, in order to reveal the mechanism of the chemical reaction, scanning electron microscopy and X-ray diffraction (XRD) were used to study the microstructure and hydration products of the C3 group cured samples. This study provides a new concept for the reuse of industrial wastes such as lithium-slag and fine-tailings.

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“…Due to its analogous physicochemical properties to SCMs, LS has been widely adopted as a cementitious material additive in mortar and concrete. Extensive research has been conducted on the performance of cementitious composite materials incorporating LS, including aspects such as setting times [ 29 , 34 ], flowability [ 49 ], and rheology [ 16 , 50 ]. Furthermore, the mechanical properties of cementitious materials with LS incorporation have been thoroughly investigated, thus encompassing parameters like compressive strength [ 50 , 51 ], tensile strength [ 52 , 53 ], elastic modulus [ 54 ], and flexural strength [ 49 ].…”

Section: Introductionmentioning

confidence: 99%

A Review on Cementitious and Geopolymer Composites with Lithium Slag Incorporation

Gou,

Rupasinghe,

Sofi

et al. 2023

Materials

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This study critically reviews lithium slag (LS) as a supplementary cementitious material (SCM), thereby examining its physiochemical characteristics, mechanical properties, and durability within cementitious and geopolymer composites. The review reveals that LS’s particle size distribution is comparable to fly ash (FA) and ground granulated blast furnace slag (GGBS), which suggests it can enhance densification and nucleation in concrete. The mechanical treatment of LS promotes early hydration by increasing the solubility of aluminum, lithium, and silicon. LS’s compositional similarity to FA endows it with low-calcium, high-reactivity properties that are suitable for cementitious and geopolymeric applications. Increasing the LS content reduces setting times and flowability while initially enhancing mechanical properties, albeit with diminishing returns beyond a 30% threshold. LS significantly improves chloride ion resistance and impacts drying shrinkage variably. This study categorizes LS’s role in concrete as a filler, pozzolan, and nucleation agent, thereby contributing to the material’s overall reduced porosity and increased durability. Economically, LS’s cost is substantially lower than FA’s; meanwhile, its environmental footprint is comparable to GGBS, thereby making it a sustainable and cost-effective alternative. Notwithstanding, there is a necessity for further research on LS’s fine-tuning through grinding, its tensile properties, its performance under environmental duress, and its pozzolanic reactivity to maximize its utility in concrete technologies. This study comprehensively discusses the current strengths and weaknesses of LS in the field of building materials, thereby offering fresh perspectives and methodologies to enhance its performance, improve its application efficiency, and broaden its scope. These efforts are driving the sustainable and green development of LS in waste utilization and advanced concrete technology.

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Recycling of lithium slag as a green admixture for white reactive powder concrete

Cited by 33 publications

References 36 publications

Compression stress-strain curve of lithium slag recycled fine aggregate concrete

Compression stress-strain curve of lithium slag recycled fine aggregate concrete

Solidification Experiment of Lithium-Slag and Fine-Tailings Based Geopolymers

A Review on Cementitious and Geopolymer Composites with Lithium Slag Incorporation

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