Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures
This work introduces an experimental study to evaluate the effect of elevated temperatures on the mechanical properties of high-performance concrete (HPC) mix with changes in Water-Cementitious ratios, W/(C+SF), Silica Fume percent, SF, and Polypropylene, PP, fiber contents. This mix was typically...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2022-09-01
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| Series: | Frattura ed Integrità Strutturale |
| Subjects: | |
| Online Access: | https://www.fracturae.com/index.php/fis/article/view/3655 |
| _version_ | 1798029623761567744 |
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| author | Mohamed Elmesiri Mohamed Fawzy Ahmed Mohamed Bneni Ahmed ElShami Seleem Ahmad |
| author_facet | Mohamed Elmesiri Mohamed Fawzy Ahmed Mohamed Bneni Ahmed ElShami Seleem Ahmad |
| author_sort | Mohamed Elmesiri |
| collection | DOAJ |
| description |
This work introduces an experimental study to evaluate the effect of elevated temperatures on the mechanical properties of high-performance concrete (HPC) mix with changes in Water-Cementitious ratios, W/(C+SF), Silica Fume percent, SF, and Polypropylene, PP, fiber contents. This mix was typically designed to satisfy the requirements of tunnel concrete. The compressive and indirect tensile strengths were measured at room temperature, RT, and after exposure to 400°C and 800°C. Moreover, SEM micrograph and EDS spot analysis tests were done to evaluate the effect of elevated temperatures. Fifteen mixes of HPC with different ratios of W/(C+SF), SF, and PP fiber were tested. According to the test results, the compressive strength values of design mixes increased significantly after exposure to 400°C. Moreover, using SF = 10%, the results indicated remarkable improvements in the compressive strength at 400°C and 800°C, in the case of the W/(C+SF) ratio of 0.31. On the other hand, the highest effect of the presence of PP fibers was 0.211, depending on variable ratios of the W/(C+SF) ratio and the SF content. In the case of PP=0.106 and SF=10%, the mass loss was higher at exposure to temperatures of 800°C.
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| first_indexed | 2024-04-11T19:28:19Z |
| format | Article |
| id | doaj.art-261dfcb4208b4ec8be27d3ce92d5ed97 |
| institution | Directory Open Access Journal |
| issn | 1971-8993 |
| language | English |
| last_indexed | 2024-04-11T19:28:19Z |
| publishDate | 2022-09-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Frattura ed Integrità Strutturale |
| spelling | doaj.art-261dfcb4208b4ec8be27d3ce92d5ed972022-12-22T04:07:04ZengGruppo Italiano FratturaFrattura ed Integrità Strutturale1971-89932022-09-011662Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures Mohamed Elmesiri0Mohamed Fawzy Ahmed1Mohamed Bneni2Ahmed ElShami3Seleem Ahmad4The Petroleum Projects and Technical Consultations Company (PETROJET), New Cairo, Cairo, EgyptThe Petroleum Projects and Technical Consultations Company (PETROJET), New Cairo, Cairo, EgyptFaculty of Engineering, University of Zawia, LibyaHousing & Building National Research Centre, Dokki, Giza, Egypt Faculty of Engineering, Zagazig University, Egypt This work introduces an experimental study to evaluate the effect of elevated temperatures on the mechanical properties of high-performance concrete (HPC) mix with changes in Water-Cementitious ratios, W/(C+SF), Silica Fume percent, SF, and Polypropylene, PP, fiber contents. This mix was typically designed to satisfy the requirements of tunnel concrete. The compressive and indirect tensile strengths were measured at room temperature, RT, and after exposure to 400°C and 800°C. Moreover, SEM micrograph and EDS spot analysis tests were done to evaluate the effect of elevated temperatures. Fifteen mixes of HPC with different ratios of W/(C+SF), SF, and PP fiber were tested. According to the test results, the compressive strength values of design mixes increased significantly after exposure to 400°C. Moreover, using SF = 10%, the results indicated remarkable improvements in the compressive strength at 400°C and 800°C, in the case of the W/(C+SF) ratio of 0.31. On the other hand, the highest effect of the presence of PP fibers was 0.211, depending on variable ratios of the W/(C+SF) ratio and the SF content. In the case of PP=0.106 and SF=10%, the mass loss was higher at exposure to temperatures of 800°C. https://www.fracturae.com/index.php/fis/article/view/3655HPCCompressive strengthSilica fumePolypropylene fibersElevated temperaturesMass loss |
| spellingShingle | Mohamed Elmesiri Mohamed Fawzy Ahmed Mohamed Bneni Ahmed ElShami Seleem Ahmad Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures Frattura ed Integrità Strutturale HPC Compressive strength Silica fume Polypropylene fibers Elevated temperatures Mass loss |
| title | Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures |
| title_full | Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures |
| title_fullStr | Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures |
| title_full_unstemmed | Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures |
| title_short | Experimentally evaluation of high-performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures |
| title_sort | experimentally evaluation of high performance concrete mixes used for tunnels and containing silica fume and polypropylene fiber after exposed to high temperatures |
| topic | HPC Compressive strength Silica fume Polypropylene fibers Elevated temperatures Mass loss |
| url | https://www.fracturae.com/index.php/fis/article/view/3655 |
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