Performance of Lightweight Concrete Beams Strengthened With GFRP | ||||
| Port-Said Engineering Research Journal | ||||
| Article 12, Volume 17, Issue 2 - Serial Number 1110, September 2013, Page 105-117 PDF (1.08 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/pserj.2013.50580 | ||||
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| Abstract | ||||
| This paper presents an investigation to improve the flexural behavior of reinforced lightweight concrete beams made of light-weight expanded clay aggregate (LECA) as 50% replacement (by volume) to the normal -weight aggregates and addition of foaming agent as percentage of weight of cement. A series of 44 lightweight reinforced concrete (LWRC) beams of 700 mm length and a rectangular cross section of 100x100 mm were cast, strengthened and then tested under three-points bending test to study the effectiveness of using externally applied glass fiber-reinforced polymer (GFRP) composites as a method of increasing the flexural strength of under-reinforced LWRC beams. The variables considered for this study was four concrete mixes and the number of GFRP layers with and without sulfate attack. The behavior of the tested beams was analyzed in terms of mode of failure load , ultimate carrying load, ultimate deflection, and toughness . Despite the experimental results illus trated that the beams strengthened with GFRP laminates exhibited better performance. Also the results show that the use of GFRP as an external reinforcement to strengthen or repair concrete structural members (pre-loaded) is more effective | ||||
| Keywords | ||||
| Lightweight concrete; flexural performance; GFRP layers; preloaded | ||||
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