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- Publisher Website: 10.1016/j.scitotenv.2020.137095
- Scopus: eid_2-s2.0-85079097275
- PMID: 32059325
- WOS: WOS:000519987300078
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Article: Hydraulic conductivity and self-healing performance of Engineered Cementitious Composites exposed to Acid Mine Drainage
Title | Hydraulic conductivity and self-healing performance of Engineered Cementitious Composites exposed to Acid Mine Drainage |
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Authors | |
Keywords | Acid mining drainage Engineered cementitious composite Hydraulic conductivity Reactive MgO Self-healing |
Issue Date | 2020 |
Citation | Science of the Total Environment, 2020, v. 716, article no. 137095 How to Cite? |
Abstract | Engineered Cementitious Composite (ECC) is proposed as a promising vertical cutoff wall material to contain acid mine drainage (AMD). The study presents comprehensive investigations of hydraulic conductivity of ECC permeated with AMD and self-healing of ECC subjected to wet-dry cycles. The effectiveness of incorporating reactive magnesia (MgO) into ECC for self-healing enhancement is also investigated. The chemical species formed in ECC and MgO-ECC specimens after exposure to AMD are investigated via SEM, FTIR, XRD and TGA analyses. The results show hydraulic conductivity of un-cracked and cracked ECC and MgO-ECC specimens pre-strained up to 1.32% is below commonly accepted limits of 10−8 m/s when permeated with AMD. The self-healing capacity of ECC specimens subjected to wet-dry cycles using both tap water and AMD as immersing liquids is improved by MgO addition. MgO addition is also beneficial for reducing hydraulic conductivity of un-cracked and cracked ECC specimens permeated with AMD. MgO addition results formation of new self-healing products including hydromagnesite and brucite when exposed to tap water, and hydrotalcite-like phase (Ht) when exposed to AMD. |
Persistent Identifier | http://hdl.handle.net/10722/334642 |
ISSN | 2023 Impact Factor: 8.2 2023 SCImago Journal Rankings: 1.998 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wu, Hao Liang | - |
dc.contributor.author | Du, Yan Jun | - |
dc.contributor.author | Yu, Jing | - |
dc.contributor.author | Yang, Yu Ling | - |
dc.contributor.author | Li, Victor C. | - |
dc.date.accessioned | 2023-10-20T06:49:36Z | - |
dc.date.available | 2023-10-20T06:49:36Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Science of the Total Environment, 2020, v. 716, article no. 137095 | - |
dc.identifier.issn | 0048-9697 | - |
dc.identifier.uri | http://hdl.handle.net/10722/334642 | - |
dc.description.abstract | Engineered Cementitious Composite (ECC) is proposed as a promising vertical cutoff wall material to contain acid mine drainage (AMD). The study presents comprehensive investigations of hydraulic conductivity of ECC permeated with AMD and self-healing of ECC subjected to wet-dry cycles. The effectiveness of incorporating reactive magnesia (MgO) into ECC for self-healing enhancement is also investigated. The chemical species formed in ECC and MgO-ECC specimens after exposure to AMD are investigated via SEM, FTIR, XRD and TGA analyses. The results show hydraulic conductivity of un-cracked and cracked ECC and MgO-ECC specimens pre-strained up to 1.32% is below commonly accepted limits of 10−8 m/s when permeated with AMD. The self-healing capacity of ECC specimens subjected to wet-dry cycles using both tap water and AMD as immersing liquids is improved by MgO addition. MgO addition is also beneficial for reducing hydraulic conductivity of un-cracked and cracked ECC specimens permeated with AMD. MgO addition results formation of new self-healing products including hydromagnesite and brucite when exposed to tap water, and hydrotalcite-like phase (Ht) when exposed to AMD. | - |
dc.language | eng | - |
dc.relation.ispartof | Science of the Total Environment | - |
dc.subject | Acid mining drainage | - |
dc.subject | Engineered cementitious composite | - |
dc.subject | Hydraulic conductivity | - |
dc.subject | Reactive MgO | - |
dc.subject | Self-healing | - |
dc.title | Hydraulic conductivity and self-healing performance of Engineered Cementitious Composites exposed to Acid Mine Drainage | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.scitotenv.2020.137095 | - |
dc.identifier.pmid | 32059325 | - |
dc.identifier.scopus | eid_2-s2.0-85079097275 | - |
dc.identifier.volume | 716 | - |
dc.identifier.spage | article no. 137095 | - |
dc.identifier.epage | article no. 137095 | - |
dc.identifier.eissn | 1879-1026 | - |
dc.identifier.isi | WOS:000519987300078 | - |