Evaluating the effect of different mix compositions and site curing methods on the drying shrinkage and early strength of pavement quality self-compacting concrete
| العنوان: | Evaluating the effect of different mix compositions and site curing methods on the drying shrinkage and early strength of pavement quality self-compacting concrete |
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| المؤلفون: | Kanish Kapoor, Dadi Rambabu, Mohit Kumar, Shashi Kant Sharma |
| المصدر: | International Journal of Pavement Research and Technology. 15:10-28 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Cement, Materials science, Curing (food preservation), Compressive strength, Aggregate (composite), Flexural strength, Silica fume, Mechanics of Materials, Ground granulated blast-furnace slag, Composite material, Civil and Structural Engineering, Shrinkage |
| الوصف: | It is required for a pavement quality concrete to achieve a flexural strength of 4.5 MPa after 28 days of curing. To open the traffic early before 28 days, it is advisable that such strength is achieved early. Along with this, an additional self-compaction ability would make the construction easier and speedy. Pozzolans are supposed to delay the hydration and give higher long-term strength but high concrete strength could only be achieved with special curing procedures. Possible pavement curing procedures matching site conditions has not been explored. In this paper, we have initially made a plain cement concrete of 28 days compressive strength 70 MPa (equivalent to 7 days flexural strength of 4.5 MPa) and have done trials on this concrete while changing the binder constituents, aggregate proportions as well as application of site curing methods to achieve the same strength with even lesser binder contents. This study utilizes ground granulated blast furnace slag (GGBS), fly ash (FA) and silica fume (SF) for achieving early strength with reduced shrinkage in pavement quality self-compacting concrete (PQSCC) under normal water (23 °C) and hot water (40 °C) for full 24 h, and steam (60 °C) curing for 2 h in 6 h cycle (four cycles in 24 h). CaCl2 was also added @1.5% by weight of binding material. Results indicate that steam curing performs well even without CaCl2 whereas hot water curing has to be complemented with CaCl2 to achieve high strength. It was possible to substitute 60% cement while maintaining high strength (> 40 MPa) after 7 days of steam curing without CaCl2, though highest compressive strength was observed with steam curing of samples containing CaCl2. Special curing is advantageous for all mixes but steam curing highly improves shrinkage resistance of GGBS dominant mixes. New mix design formula which combines high packing density theory and Okamura and Ozawa method was highly effective in complimenting the properties. |
| تدمد: | 1997-1400 1996-6814 |
| DOI: | 10.1007/s42947-021-00004-6 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::ced551e3dccf7a2ad4a059c86b928ca0 https://doi.org/10.1007/s42947-021-00004-6 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........ced551e3dccf7a2ad4a059c86b928ca0 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19971400 19966814 |
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| DOI: | 10.1007/s42947-021-00004-6 |