Preparation and properties of high-strength lightweight aggregate ceramsite from nepheline tailings

Jiang, Jun; Chen, Song; Chen, Jin; Gui, Weihua; Li, Shipeng; Xu, Tianyuan; Lei, Luo; Dang, Wenjing; Xu, Yang; Ding, Tao; Li, Zhengyin; Lu, Zhongyuan; Li, Jun

doi:10.1016/j.conbuildmat.2023.130458

Cited by 25 publications

(1 citation statement)

References 26 publications

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“…In this stage, the gas-producing components in the ceramsite would be released to generate a large amount of gas. When sufficient liquid phases were formed, the gas could be easier encapsulated by the liquid phase, thus forcing the matrix to expand and creating numerous pores inside the ceramsite (Jun et al, 2023). However, at excessively high sintering temperatures, the viscosity of the liquid phase decreased, which facilitated the migration and diffusion of gas phases, which resulted in the merging and enlargement of small enclosed pores to form larger ones, or even causing the gas escape.…”

Section: Morphological Analysismentioning

confidence: 99%

Preparation and properties of lightweight and high-strength building ceramsites with oil-based drilling cuttings pyrolysis residues

Wang,

Li,

Lin

et al. 2023

Front. Mater.

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With the continuing advancement in China’s exploration and development technologies of shale gas resources, there was a significant increase in shale gas oil-based drilling cuttings. In this paper, oil-based drilling cutting pyrolysis residues (ODCPRs) was used as the main raw material for preparing lightweight and high-strength building ceramsites to eliminate the environmental risks and recycle industrial waste. Firstly, orthogonal experiments were used to study the influences of raw material composition, preheating temperature, preheating time, sintering temperature, and sintering time on the properties of building ceramsites. From the results, the sintering temperature and the content of ODCPRs were discovered to be the key factors affecting the sintering process of ceramsites. Secondly, the influences of sintering temperature and heating rate on the properties of building ceramists were further explored to find the optimum sintering conditions. When the content of ODCPRs in the ceramsite was set to be 50%, the obtained building ceramsites presented excellent properties with particle compressive strength of 6.31 MPa, bulk density of 575.11 kg/m3, apparent density of 1097.24 kg/m3, and the water absorption of 1.89%. Finally, XRD, SEM, TG-DSC, and heavy metal leaching experiments were comprehensively conducted to analyze the composition structure variation and sintering mechanism of the building ceramsite. This paper presents an approach for the recycling, utilization, and disposal of oil-based drilling cuttings in the oil field waste management.

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Section: Morphological Analysismentioning

confidence: 99%