Corrosion of steel reinforcements embedded in FRP wrapped concrete

Gadve, Sangeeta; Mukherjee, Abhijit; Malhotra, S.N.

doi:10.1016/j.conbuildmat.2008.01.008

Cited by 60 publications

(30 citation statements)

References 14 publications

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“…Concrete with high permeability provides ready access for both water and harmful substances, resulting in deterioration of either concrete or steel reinforcement embedded in the concrete or a combination of both [13]. Chloride-induced corrosion of reinforcing steel is one of the most pressing problems worldwide that the construction industry is facing today.…”

Section: Introductionmentioning

confidence: 99%

Effect of calcifying bacteria on permeation properties of concrete structures

Achal

Mukherjee

Reddy

2010

J Ind Microbiol Biotechnol

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148

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Microbially enhanced calcite precipitation on concrete or mortar has become an important area of research regarding construction materials. This study examined the effect of calcite precipitation induced by Sporosarcina pasteurii (Bp M-3) on parameters affecting the durability of concrete or mortar. An inexpensive industrial waste, corn steep liquor (CSL), from starch industry was used as nutrient source for the growth of bacteria and calcite production, and the results obtained with CSL were compared with those of the standard commercial medium. Bacterial deposition of a layer of calcite on the surface of the specimens resulted in substantial decrease of water uptake, permeability, and chloride penetration compared with control specimens without bacteria. The results obtained with CSL medium were comparable to those obtained with standard medium, indicating the economization of the biocalcification process. The results suggest that calcifying bacteria play an important role in enhancing the durability of concrete structures.

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Section: Introductionmentioning

confidence: 99%

Effect of calcifying bacteria on permeation properties of concrete structures

Achal

Mukherjee

Reddy

2010

J Ind Microbiol Biotechnol

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148

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“…Fibre reinforced polymers (FRPs) bonded to the external faces of corroded RC structures are often used to increase their loadbearing capacities (Al-Saidy et al, 2010;El Maaddawy and Soudki, 2005;Gadve et al, 2009). El Maaddawy and reported that strengthening an uncorroded RC beam with FRPs increased its load-bearing capacity by 50%.…”

Section: Introductionmentioning

confidence: 99%

Load-bearing capacity of corroded, patched and FRP-repaired RC beams

Malumbela

Moyo

Alexander

2011

Magazine of Concrete Research

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This paper presents the results of an experimental study conducted to investigate the performance of corroded, patched and fibre reinforced polymer (FRP) repaired reinforced concrete (RC) beams. The overall programme tested 20 quasi-full-scale (153325433000 mm) RC beams of which 17 were corroded under various levels of sustained loads.After corrosion, eight beams were patch-repaired whilst four were FRP-repaired. Two of the patch-repaired beams were later further repaired with FRPs. The test results showed that 1% mass loss of steel reduced the load-bearing capacity of RC beams by 0 . 8%. Patch repairs were found to slightly increase (by 2 . 5%) the load-bearing capacity of corroded beams, but to significantly increase their stiffness. The load-bearing capacity of FRP-repaired beams was about 50% larger than the capacity of an uncorroded beam and was insensitive to levels of steel corrosion and to patch repairs. There was, however, a significant increase in stiffness of the patch-and then the FRP-repaired beams.It is, therefore, recommended that repair of corroded RC structures should entail patching followed by FRP repairs.

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“…In addition to this, FRP wraps have been successfully used for repair of RC structures affected by corrosion [17][18][19][20][21][22][23][24][25][26][27][28][29]. It is due to the reason that surface bonded FRP applies confinement pressure to RC member affected by corrosion and prevents the dislodging of the concrete cover.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic guided waves for monitoring corrosion of FRP wrapped concrete structures

Sharma

et al. 2015

Construction and Building Materials

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Corrosion of steel reinforcements embedded in FRP wrapped concrete

Cited by 60 publications

References 14 publications

Effect of calcifying bacteria on permeation properties of concrete structures

Effect of calcifying bacteria on permeation properties of concrete structures

Load-bearing capacity of corroded, patched and FRP-repaired RC beams

Ultrasonic guided waves for monitoring corrosion of FRP wrapped concrete structures

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