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高碱、高硫酸盐和高氟含量的再生锂渣对蒸压加气混凝土组成和微观结构的影响

The Influence of Retreated Lithium Slag with a High Content of Alkali, Sulfate and Fluoride on the Composition and the Microstructure of Autoclaved Aerated Concrete.

作者信息

Zhong Dongqing, Wei Shihong, Zhou Hao, He Xiaohang, Qian Binbin, Ma Bing, Hu Yueyang, Ren Xuehong

机构信息

College of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224000, China.

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Nanjing 210042, China.

出版信息

Materials (Basel). 2024 May 27;17(11):2569. doi: 10.3390/ma17112569.

DOI:10.3390/ma17112569
PMID:38893835
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11173403/
Abstract

In this paper, the possibility of retreated lithium slag (RTLS) with a high content of alkali, sulfate and fluoride as a partial replacement for fly ash (FA) to produce autoclaved aerated concrete (AAC) was investigated. The influence of the RTLS dosage on the AAC performance were examined. The composition and microstructure of hydrates as well as the microstructure of the RTLS-FA-based AAC compositions were determined by XRD, FTIR, TG-DSC and SEM. The results illustrated that the incorporation of RTLS changed the crystal structure and the microstructure of the tobermorite. With increased RTLS contents, the morphology of tobermorite was changed, and the grass-like tobermorite gradually transformed into network-like tobermorite. The newly formed tobermorite improved the mechanical performance of the AAC. Compared with the RTLS10, the content of tobermorite in the RTLS30 increased by 8.6%.

摘要

本文研究了高碱、高硫酸盐和高氟含量的再生锂渣（RTLS）作为粉煤灰（FA）的部分替代品用于生产蒸压加气混凝土（AAC）的可能性。考察了RTLS掺量对AAC性能的影响。通过XRD、FTIR、TG-DSC和SEM测定了水合物的组成和微观结构以及基于RTLS-FA的AAC组合物的微观结构。结果表明，RTLS的掺入改变了雪硅钙石的晶体结构和微观结构。随着RTLS含量的增加，雪硅钙石的形态发生变化，草状雪硅钙石逐渐转变为网状雪硅钙石。新形成的雪硅钙石改善了AAC的力学性能。与RTLS10相比，RTLS30中雪硅钙石的含量增加了8.6%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3126/11173403/80d6d56eaf2f/materials-17-02569-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3126/11173403/80d6d56eaf2f/materials-17-02569-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3126/11173403/a05a23cbc715/materials-17-02569-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3126/11173403/92f5a8bdfa50/materials-17-02569-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3126/11173403/80d6d56eaf2f/materials-17-02569-g013.jpg

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Synthesis of in-situ Al-defected iron oxide nanoflakes from coal ash: A detailed study on the structure, evolution mechanism and application to water remediation.从粉煤灰中合成原位铝缺陷型氧化铁纳米片：关于结构、演变机制及水修复应用的详细研究
J Hazard Mater. 2020 Aug 5;395:122696. doi: 10.1016/j.jhazmat.2020.122696. Epub 2020 Apr 21.