Murtiadi, Suryawan and Akmaluddin, A and Kencanawati, Ni Nyoman (2021) Effect of polypropylene fibers on unrestrained early age shrinkage of concrete and long-term performance subjected to fire. Proceeding ICST (2021) e-ISSN: 2722-7375 Vol. 2, June 2021, 2. pp. 385-395. ISSN 2722-7375
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44. Effect of poly.pdf Download (3MB) | Preview |
Abstract
Micro cracks at early age concrete very difficult to avoid although treatments have always been managed. This study focuses on the role of polypropylene fibers of concrete mixtures during first 24 hours after casting. Further investigation has also been carried out to investigate long-term performance of concrete subjected to fire.Size model of 60 mm x 100 mm x 1000 mm was employed investigating the plastic shrinkages,and 50 mm x 200 mm x 350 mm was used to examine concrete micro-cracks. Five polypropylene dosages variations of 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% to the mortar volume were applied. Whilst, cylindrical specimen of Ø150 mm x 300 mm has been conducted with five variations of 0, 1.5, 2.0, 2.5, and 3 kg/m3 polypropylene dosages to investigate concrete performance under various temperatures. Test results indicate the addition of polypropylene fibers play significant role to reduce cracks and plastic shrinkage. The 0.3% of polypropylene fibers reduces shrinkage losses to 90%. Under elevated temperature, the addition of polypropylene has less significant effect on normal concrete but has very significant effect on high-strength concrete. The high-strength concrete with 2.0 kg/m3 polypropylene dosage under temperature of 300OC and 700OC has 90% and 35% residual strength, respectively. Therefore, minimum value of 2.0 kg/m3 polypropylene addition to the concrete mixture is recommended.
| Item Type: | Article |
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| Keywords (Kata Kunci): | Concrete; polypropylene; plastic shrinkage; elevated temperature. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Fakultas Teknik |
| Depositing User: | Dr. Suryawan Murtiadi |
| Date Deposited: | 30 Mar 2023 04:32 |
| Last Modified: | 30 Mar 2023 04:32 |
| URI: | http://eprints.unram.ac.id/id/eprint/35741 |
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