Effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup-confined ECC stub columns
Engineered cementitious composites (ECC) exhibit behaviors of multiple cracking and strain-hardening compared to ordinary concrete. However, the use of ultrafine silica sand (S) to produce ECC results in increased cost and environmental overload. This study was to develop an eco-friendly and cheaper...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2023-09-01
|
| Series: | Reviews on Advanced Materials Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/rams-2023-0110 |
| _version_ | 1827825331600359424 |
|---|---|
| author | Liu Kangning Wang Sheliang Xiong Ergang Quan Xiaoyi Wu Jing Xu Jin Zhao Nan |
| author_facet | Liu Kangning Wang Sheliang Xiong Ergang Quan Xiaoyi Wu Jing Xu Jin Zhao Nan |
| author_sort | Liu Kangning |
| collection | DOAJ |
| description | Engineered cementitious composites (ECC) exhibit behaviors of multiple cracking and strain-hardening compared to ordinary concrete. However, the use of ultrafine silica sand (S) to produce ECC results in increased cost and environmental overload. This study was to develop an eco-friendly and cheaper ECC by incorporating different replacement ratios of industrial byproduct molybdenum tailings (MT). The mechanical properties of ECC with MT were evaluated. Based on industrial computer technology, nuclear magnetic resonance, and scanning electron microscope techniques, the three-dimensional spatial distribution and fluid distribution of pores and the microstructure of the ECC were investigated, respectively. The mechanical properties of stirrup-confined ECC stub columns were also investigated. Results indicated that the ECC incorporating 25% MT exhibited the best mechanical properties, in which the tensile strength (f
t) increased by 32.16% and exhibited well strain-hardening behaviors. Under a 25% MT replacement ratio, ECC had the lowest porosity and good interfacial transition zone, and bonding interface between polyvinyl alcohol (PVA) fiber (PF) and matrix. Moreover, the stirrup-confined ECC stub column with 25% MT can ensure better both the peak stress (f
cc) and peak strain (ε
cc). The assessment of environmental impact and cost further indicated that the incorporation of MT to prepare ECC is a promising method. |
| first_indexed | 2024-03-12T02:40:35Z |
| format | Article |
| id | doaj.art-bc1ee6adf0a34fa699b2da05e2635821 |
| institution | Directory Open Access Journal |
| issn | 1605-8127 |
| language | English |
| last_indexed | 2024-03-12T02:40:35Z |
| publishDate | 2023-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Reviews on Advanced Materials Science |
| spelling | doaj.art-bc1ee6adf0a34fa699b2da05e26358212023-09-04T07:10:31ZengDe GruyterReviews on Advanced Materials Science1605-81272023-09-01621id. 12547210.1515/rams-2023-0110Effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup-confined ECC stub columnsLiu Kangning0Wang Sheliang1Xiong Ergang2Quan Xiaoyi3Wu Jing4Xu Jin5Zhao Nan6School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an710055, ChinaSchool of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an710055, ChinaSchool of Civil Engineering, Chang’an University, Xi’an710061, Shaanxi, ChinaSchool of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an710055, ChinaSchool of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an710055, ChinaSchool of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an710055, ChinaSchool of Science, Xi’an University of Architecture and Technology, Xi’an710055, ChinaEngineered cementitious composites (ECC) exhibit behaviors of multiple cracking and strain-hardening compared to ordinary concrete. However, the use of ultrafine silica sand (S) to produce ECC results in increased cost and environmental overload. This study was to develop an eco-friendly and cheaper ECC by incorporating different replacement ratios of industrial byproduct molybdenum tailings (MT). The mechanical properties of ECC with MT were evaluated. Based on industrial computer technology, nuclear magnetic resonance, and scanning electron microscope techniques, the three-dimensional spatial distribution and fluid distribution of pores and the microstructure of the ECC were investigated, respectively. The mechanical properties of stirrup-confined ECC stub columns were also investigated. Results indicated that the ECC incorporating 25% MT exhibited the best mechanical properties, in which the tensile strength (f t) increased by 32.16% and exhibited well strain-hardening behaviors. Under a 25% MT replacement ratio, ECC had the lowest porosity and good interfacial transition zone, and bonding interface between polyvinyl alcohol (PVA) fiber (PF) and matrix. Moreover, the stirrup-confined ECC stub column with 25% MT can ensure better both the peak stress (f cc) and peak strain (ε cc). The assessment of environmental impact and cost further indicated that the incorporation of MT to prepare ECC is a promising method.https://doi.org/10.1515/rams-2023-0110molybdenum tailingsengineered cementitious compositesmechanical properties |
| spellingShingle | Liu Kangning Wang Sheliang Xiong Ergang Quan Xiaoyi Wu Jing Xu Jin Zhao Nan Effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup-confined ECC stub columns Reviews on Advanced Materials Science molybdenum tailings engineered cementitious composites mechanical properties |
| title | Effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup-confined ECC stub columns |
| title_full | Effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup-confined ECC stub columns |
| title_fullStr | Effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup-confined ECC stub columns |
| title_full_unstemmed | Effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup-confined ECC stub columns |
| title_short | Effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup-confined ECC stub columns |
| title_sort | effect of molybdenum tailings aggregate on mechanical properties of engineered cementitious composites and stirrup confined ecc stub columns |
| topic | molybdenum tailings engineered cementitious composites mechanical properties |
| url | https://doi.org/10.1515/rams-2023-0110 |
| work_keys_str_mv | AT liukangning effectofmolybdenumtailingsaggregateonmechanicalpropertiesofengineeredcementitiouscompositesandstirrupconfinedeccstubcolumns AT wangsheliang effectofmolybdenumtailingsaggregateonmechanicalpropertiesofengineeredcementitiouscompositesandstirrupconfinedeccstubcolumns AT xiongergang effectofmolybdenumtailingsaggregateonmechanicalpropertiesofengineeredcementitiouscompositesandstirrupconfinedeccstubcolumns AT quanxiaoyi effectofmolybdenumtailingsaggregateonmechanicalpropertiesofengineeredcementitiouscompositesandstirrupconfinedeccstubcolumns AT wujing effectofmolybdenumtailingsaggregateonmechanicalpropertiesofengineeredcementitiouscompositesandstirrupconfinedeccstubcolumns AT xujin effectofmolybdenumtailingsaggregateonmechanicalpropertiesofengineeredcementitiouscompositesandstirrupconfinedeccstubcolumns AT zhaonan effectofmolybdenumtailingsaggregateonmechanicalpropertiesofengineeredcementitiouscompositesandstirrupconfinedeccstubcolumns |