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A platform for research: civil engineering, architecture and urbanism
Studies on Strength Characteristic of Recycled Aggregate Concrete Using Supplementary Cementitious Materials and Hybrid Fibres
It is critical to improve the strength parameters of recycled coarse aggregate concrete to be equal to virgin aggregate concrete. Thus, the research focusses on using different percentages of replacements of ordinary Portland cement with a supplementary cementitious materials (SCMs) to determine the best combination for structural purposes by adding a hybrid of glass and steel fibres. In the experimentation, the recycled coarse aggregate was used at a constant percentage of 75% as a partial substitute of natural coarse aggregate, and SCMs used as a partial substitute of ordinary Portland cement were rice husk ash at 10, 15, and 20% and also silica fume at 8, 12, and 16% by weight of cement. The hybrid of a glass of steel fibres was also added by volume fraction of concrete in ratios of 50:50, 25:75, and 75:25 in all of the percentage replacements of rice husk ash and silica fume. Mechanical parameters like compressive, flexural, and split tensile strength were assessed. Result revealed that the target strength of M25 was achieved with the combinations of RCA75-RHA15-GF0.5-XSF0.5 (i.e.75% recycled coarse aggregate, 15% cement replacement with rice husk ash, 0.5% glass fibre, and 0.5% steel fibre) and RCA75-SF8-GF0.25-XSF0.75 (i.e.75% recycled coarse aggregate, 8% cement replacement with silica fume, 0.5% glass fibre, and 0.5% steel fibre). Similar trends were observed in split tensile and flexural strength. The study concludes that these combinations can be used for structural purposes.
Studies on Strength Characteristic of Recycled Aggregate Concrete Using Supplementary Cementitious Materials and Hybrid Fibres
It is critical to improve the strength parameters of recycled coarse aggregate concrete to be equal to virgin aggregate concrete. Thus, the research focusses on using different percentages of replacements of ordinary Portland cement with a supplementary cementitious materials (SCMs) to determine the best combination for structural purposes by adding a hybrid of glass and steel fibres. In the experimentation, the recycled coarse aggregate was used at a constant percentage of 75% as a partial substitute of natural coarse aggregate, and SCMs used as a partial substitute of ordinary Portland cement were rice husk ash at 10, 15, and 20% and also silica fume at 8, 12, and 16% by weight of cement. The hybrid of a glass of steel fibres was also added by volume fraction of concrete in ratios of 50:50, 25:75, and 75:25 in all of the percentage replacements of rice husk ash and silica fume. Mechanical parameters like compressive, flexural, and split tensile strength were assessed. Result revealed that the target strength of M25 was achieved with the combinations of RCA75-RHA15-GF0.5-XSF0.5 (i.e.75% recycled coarse aggregate, 15% cement replacement with rice husk ash, 0.5% glass fibre, and 0.5% steel fibre) and RCA75-SF8-GF0.25-XSF0.75 (i.e.75% recycled coarse aggregate, 8% cement replacement with silica fume, 0.5% glass fibre, and 0.5% steel fibre). Similar trends were observed in split tensile and flexural strength. The study concludes that these combinations can be used for structural purposes.
Studies on Strength Characteristic of Recycled Aggregate Concrete Using Supplementary Cementitious Materials and Hybrid Fibres
Lecture Notes in Civil Engineering
Reddy, Krishna R. (editor) / Kalia, Susheel (editor) / Tangellapalli, Srinivas (editor) / Prakash, Divya (editor) / Alhaji, Musa Aminu (author) / Sharma, Pushpendra Kumar (author)
2022-10-26
15 pages
Article/Chapter (Book)
Electronic Resource
English
| Trans Tech Publications | 2019