Effect of admixtures and PVA fiber on the mechanical properties of high strength cementitious grout
In order to seal the joints between the ultra-high-performance concrete (UHPC) permanent formworks, the high strength cementitious grout (HSCG) was investigated in the presented work. The water reducer content and the water to binding materials (W/B) ratio of the grout were modified to meet the grou...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-07-01
|
| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523000633 |
| _version_ | 1797798958669496320 |
|---|---|
| author | Yibo Yang Baixi Chen Yong Chen Fucai Liu Xiangming Xie Wenying Guo Hengchang Wang |
| author_facet | Yibo Yang Baixi Chen Yong Chen Fucai Liu Xiangming Xie Wenying Guo Hengchang Wang |
| author_sort | Yibo Yang |
| collection | DOAJ |
| description | In order to seal the joints between the ultra-high-performance concrete (UHPC) permanent formworks, the high strength cementitious grout (HSCG) was investigated in the presented work. The water reducer content and the water to binding materials (W/B) ratio of the grout were modified to meet the grout fluidity requirement, and then the effects of three commonly used admixtures (i.e., hydrophobic powders (HP), expansive agents (EA), and redispersible polymer powders (RPP)) and PVA fibers on the compressive, tensile, flexural, and adhesive strengths of the HSCG were investigated. In addition to the normal condition, the adhesive strengths under the soaked condition and the thermal aging condition were also evaluated. The HP worsen all strength index, especially the adhesive strength, while the appropriate utilization of the EA could improve all strength indexes by more than 12%. With the addition of RPP, the adhesive strengths under the soaked and thermal aging conditions could be significantly enhanced by over 85%. The PVA fiber could also enhance the normal adhesive strength by 20.5%. Based on the experimental results, the recommended contents of the EA, RPP, and PVA fibers were 6%, 2%, and 0.3%, respectively, while the HP was not suggested for the HSCG due to its adverse effect on the mechanical performances. |
| first_indexed | 2024-03-13T04:12:46Z |
| format | Article |
| id | doaj.art-a37d9aaf75a44ea89188ac139cb86ebe |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:12:46Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-a37d9aaf75a44ea89188ac139cb86ebe2023-06-21T06:53:37ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e01884Effect of admixtures and PVA fiber on the mechanical properties of high strength cementitious groutYibo Yang0Baixi Chen1Yong Chen2Fucai Liu3Xiangming Xie4Wenying Guo5Hengchang Wang6School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China; State Key Laboratory of Subtropical Architectures Science, South China University of Technology, Guangzhou 510641, ChinaDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; Corresponding author.School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, ChinaGuangdong Gaiteqi New Materials Technology Co, Ltd, Qingyuan 511600, ChinaGuangdong No. 2. Hydropower Engineering Co, Ltd, Guangzhou 511300, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, ChinaIn order to seal the joints between the ultra-high-performance concrete (UHPC) permanent formworks, the high strength cementitious grout (HSCG) was investigated in the presented work. The water reducer content and the water to binding materials (W/B) ratio of the grout were modified to meet the grout fluidity requirement, and then the effects of three commonly used admixtures (i.e., hydrophobic powders (HP), expansive agents (EA), and redispersible polymer powders (RPP)) and PVA fibers on the compressive, tensile, flexural, and adhesive strengths of the HSCG were investigated. In addition to the normal condition, the adhesive strengths under the soaked condition and the thermal aging condition were also evaluated. The HP worsen all strength index, especially the adhesive strength, while the appropriate utilization of the EA could improve all strength indexes by more than 12%. With the addition of RPP, the adhesive strengths under the soaked and thermal aging conditions could be significantly enhanced by over 85%. The PVA fiber could also enhance the normal adhesive strength by 20.5%. Based on the experimental results, the recommended contents of the EA, RPP, and PVA fibers were 6%, 2%, and 0.3%, respectively, while the HP was not suggested for the HSCG due to its adverse effect on the mechanical performances.http://www.sciencedirect.com/science/article/pii/S2214509523000633Cementitious groutUHPC formwork systemsInfluence of admixturesMechanical performance |
| spellingShingle | Yibo Yang Baixi Chen Yong Chen Fucai Liu Xiangming Xie Wenying Guo Hengchang Wang Effect of admixtures and PVA fiber on the mechanical properties of high strength cementitious grout Case Studies in Construction Materials Cementitious grout UHPC formwork systems Influence of admixtures Mechanical performance |
| title | Effect of admixtures and PVA fiber on the mechanical properties of high strength cementitious grout |
| title_full | Effect of admixtures and PVA fiber on the mechanical properties of high strength cementitious grout |
| title_fullStr | Effect of admixtures and PVA fiber on the mechanical properties of high strength cementitious grout |
| title_full_unstemmed | Effect of admixtures and PVA fiber on the mechanical properties of high strength cementitious grout |
| title_short | Effect of admixtures and PVA fiber on the mechanical properties of high strength cementitious grout |
| title_sort | effect of admixtures and pva fiber on the mechanical properties of high strength cementitious grout |
| topic | Cementitious grout UHPC formwork systems Influence of admixtures Mechanical performance |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523000633 |
| work_keys_str_mv | AT yiboyang effectofadmixturesandpvafiberonthemechanicalpropertiesofhighstrengthcementitiousgrout AT baixichen effectofadmixturesandpvafiberonthemechanicalpropertiesofhighstrengthcementitiousgrout AT yongchen effectofadmixturesandpvafiberonthemechanicalpropertiesofhighstrengthcementitiousgrout AT fucailiu effectofadmixturesandpvafiberonthemechanicalpropertiesofhighstrengthcementitiousgrout AT xiangmingxie effectofadmixturesandpvafiberonthemechanicalpropertiesofhighstrengthcementitiousgrout AT wenyingguo effectofadmixturesandpvafiberonthemechanicalpropertiesofhighstrengthcementitiousgrout AT hengchangwang effectofadmixturesandpvafiberonthemechanicalpropertiesofhighstrengthcementitiousgrout |