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添加碱渣及其化学成分对碱渣激发矿渣胶凝材料物理性能和水化产物的影响。

Effect of Soda Residue Addition and Its Chemical Composition on Physical Properties and Hydration Products of Soda Residue-Activated Slag Cementitious Materials.

作者信息

Lin Yonghui, Xu Dongqiang, Zhao Xianhui

机构信息

School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China.

Department of Economics and Management, Hebei Normal University for Nationalities, Chengde 067000, China.

出版信息

Materials (Basel). 2020 Apr 10;13(7):1789. doi: 10.3390/ma13071789.

DOI:10.3390/ma13071789
PMID:32290192
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7179023/
Abstract

Soda residue (SR), the solid waste of NaCO produced by ammonia soda process, pollutes water and soil, increasing environmental pressure. SR has high alkalinity, and its main components are Ca(OH), NaCl, CaCl, CaSO, and CaCO, which accords with the requirements of being an alkali activator. The aim of this research is to investigate the best proportion of SR addition and the contribution of individual chemical components in SR to SR- activated ground granulated blast furnace slag (GGBS) cementitious materials. In this paper, GGBS pastes activated by SR, Ca(OH), Ca(OH) + NaCl, Ca(OH) + CaCl, Ca(OH) + CaSO, and Ca(OH) + CaCO were studied regarding setting time, compressive strength (1 d, 3 d, 7 d, 14 d, 28 d), hydration products, and microstructure. The results demonstrate that SR (24%)-activated GGBS pastes possess acceptable setting time and compressive strength (29.6 MPa, 28 d), and its hydration products are calcium silicate hydrate (CSH) gel, calcium aluminum silicate hydrates (CASH) gel and Friedel's salt. CaCl in SR plays a main role in hydration products generation and high compressive strength of SR- activated GGBS pastes.

摘要

苏打残渣（SR）是氨碱法生产碳酸钠产生的固体废弃物，会污染水和土壤，增加环境压力。SR具有高碱性，其主要成分是Ca(OH)、NaCl、CaCl、CaSO和CaCO，符合作为碱激发剂的要求。本研究的目的是研究SR的最佳添加比例以及SR中各化学成分对SR激发的粒化高炉矿渣（GGBS）胶凝材料的贡献。本文研究了由SR、Ca(OH)、Ca(OH)+NaCl、Ca(OH)+CaCl、Ca(OH)+CaSO和Ca(OH)+CaCO激发的GGBS浆体的凝结时间、抗压强度（1d、3d、7d、14d、28d）、水化产物和微观结构。结果表明，SR（24%）激发的GGBS浆体具有可接受的凝结时间和抗压强度（28d时为29.6MPa），其水化产物为硅酸钙水化物（CSH）凝胶、钙铝硅酸盐水化物（CASH）凝胶和Friedel盐。SR中的CaCl在水化产物生成和SR激发的GGBS浆体的高抗压强度中起主要作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/76d19a0668ad/materials-13-01789-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/437ba72c5776/materials-13-01789-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/ee1476c68fe1/materials-13-01789-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/5b3fc3f3ac7c/materials-13-01789-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/b924e9f16011/materials-13-01789-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/641298566e2e/materials-13-01789-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/e94638a8969c/materials-13-01789-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/76d19a0668ad/materials-13-01789-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/437ba72c5776/materials-13-01789-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/43ff048e6bf0/materials-13-01789-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/ee1476c68fe1/materials-13-01789-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/5b3fc3f3ac7c/materials-13-01789-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/b924e9f16011/materials-13-01789-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/641298566e2e/materials-13-01789-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/e94638a8969c/materials-13-01789-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ba1/7179023/76d19a0668ad/materials-13-01789-g008.jpg

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