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Experimental study on flexural behavior of reinforced lightweight concrete beams strengthening with a slurry infiltrated fiber concrete (SIFCON)
Slurry infiltrated fiber concrete (SIFCON) is a new concrete technology application that has gained a lot of popularity as a strengthening technique. This new construction material has high strength, large ductility, and enhanced energy absorption capacity. As a result of these characteristics, SIFCON is able to improve the performance and useful life of the reinforced concrete structures. A study was conducted to assess flexural strength of reinforced lightweight concrete (RC) strengthened beams with different reinforcement ratios, concrete grades, and anchor attachment techniques. Under monotonic four-point bending conditions, twelve lightweight concrete beams (120 × 150 × 1700 mm) were cast and tested; four of the beams were controls, while the rest were strengthened. Among the performance indicators taken into account were ultimate flexural capacity, the first crack load, ductility index, toughness, and the mode of failure. Different failure modes were observed according to the beams strengthening method (soffit or U-shape) and steel reinforcement ratio. SIFCON significantly improved the beam's flexural capacity compared to the control specimens. Over the control specimens, strengthened U-shaped specimens outperformed their soffit-strengthened counterparts by 100.6%. Strengthening concrete beams of low reinforcement ratio improved the ductility index but not the beams with a U-shape upgrading layer. The ductility index was up to 4.7 and 4.9 compared to 2.09 and 2.47 for the normal and high-strength control beams, respectively. Strengthened concrete beams of high reinforcement ratio do not significantly change the ductility index over the control beams. Regarding energy absorption, there is no clear relationship between toughness and the strengthening methods employed during this study.
Experimental study on flexural behavior of reinforced lightweight concrete beams strengthening with a slurry infiltrated fiber concrete (SIFCON)
Slurry infiltrated fiber concrete (SIFCON) is a new concrete technology application that has gained a lot of popularity as a strengthening technique. This new construction material has high strength, large ductility, and enhanced energy absorption capacity. As a result of these characteristics, SIFCON is able to improve the performance and useful life of the reinforced concrete structures. A study was conducted to assess flexural strength of reinforced lightweight concrete (RC) strengthened beams with different reinforcement ratios, concrete grades, and anchor attachment techniques. Under monotonic four-point bending conditions, twelve lightweight concrete beams (120 × 150 × 1700 mm) were cast and tested; four of the beams were controls, while the rest were strengthened. Among the performance indicators taken into account were ultimate flexural capacity, the first crack load, ductility index, toughness, and the mode of failure. Different failure modes were observed according to the beams strengthening method (soffit or U-shape) and steel reinforcement ratio. SIFCON significantly improved the beam's flexural capacity compared to the control specimens. Over the control specimens, strengthened U-shaped specimens outperformed their soffit-strengthened counterparts by 100.6%. Strengthening concrete beams of low reinforcement ratio improved the ductility index but not the beams with a U-shape upgrading layer. The ductility index was up to 4.7 and 4.9 compared to 2.09 and 2.47 for the normal and high-strength control beams, respectively. Strengthened concrete beams of high reinforcement ratio do not significantly change the ductility index over the control beams. Regarding energy absorption, there is no clear relationship between toughness and the strengthening methods employed during this study.
Experimental study on flexural behavior of reinforced lightweight concrete beams strengthening with a slurry infiltrated fiber concrete (SIFCON)
Asian J Civ Eng
Marid, Hussein (author) / Vahidi, Ebrahim Khalilzadeh (author)
Asian Journal of Civil Engineering ; 25 ; 1811-1823
2024-02-01
13 pages
Article (Journal)
Electronic Resource
English
Flexural Behavior of Slurry Infiltrated Fiber Concrete (SIFCON) Made Using Condensed Silica Fume
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SIFCON (Slurry Infiltrated Fiber Concrete) Under Dynamic Loading
| British Library Conference Proceedings | 2000