Corrosion of reinforcement in concrete construction

Googan, Chris

doi:10.1016/s0010-938x(96)00165-5

Cited by 6 publications

(4 citation statements)

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“…Previous study found Modulus of Elasticity of fly ash geopolymer was lower than OPC concrete [16]. Low modulus of elasticity is advantageous because it reduces the time of crack propagation in concrete cover when corrosion occurs in reinforced concrete [17].…”

Section: Resultsmentioning

confidence: 93%

Properties of Geopolymer Concrete from Local Fly Ash (FA) and Palm Oil Fuel Ash (POFA)

Olivia

Kamaldi

Sitompul

et al. 2014

MSF

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Geopolymer is an inorganic polymer from activation of source materials that rich of silica and alumina with alkaline activator. Previous studies reveal that the geopolymer has engineering properties and durability, which is equivalent or higher than the Ordinary Portland Cement (OPC) concrete. This paper presents properties of geopolymer concrete prepared with local Palm Oil Fuel Ash (POFA) and Fly Ash (FA) from agro-industrial waste in Riau Province, Indonesia. The POFA and FA were activated by a combination of sodium hydroxide and sodium silicate. The specimens were cured at room temperature for 24 hours before steam cured for another 24 hours at 60OC. Hardened properties namely compressive strength, tensile strength, flexural strength and modulus of elasticity, and water penetration of both POFA and FA geopolymer concrete were determined at 7, 14 and 28 days. Results showed that local POFA and FA as geopolymer source materials could produce mix with strength 19-22.5 MPa at 28 days. The compressive strength, tensile strength, flexural strength and modulus of elasticity of both geopolymer tended to increase slightly with time. In general, the results suggest that the local POFA and FA are potential as source material to produce geopolymer concrete.

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Section: Resultsmentioning

confidence: 93%

Properties of Geopolymer Concrete from Local Fly Ash (FA) and Palm Oil Fuel Ash (POFA)

Olivia

Kamaldi

Sitompul

et al. 2014

MSF

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“…Not everyone agrees on the chronological order of degradation. Some [11] have suggested the following chain of events: 1, chloride penetration; 2, corrosion; 3, cracking and spalling (where the expanding corroded rebar has exerted such a force as to dislodge some concrete). Others [5] have suggested a slightly different ordering: 1, cracking occurs; 2, chlorides are introduced via the cracks; 3, corrosion occurs, causing more cracks.…”

Section: Fibers Corrosion and Chloridementioning

confidence: 99%

Corrosion detection in reinforced concrete roadways and bridges via embedded fiber optic sensors

Fuhr

Huston

1998

Smart Mater. Struct.

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The problems associated with the application of chloride-based deicing agents to roadways and specifically bridges include chemical pollution and accelerated corrosion of strength members (especially the rebar) within the structure. In many instances, local ordnances are attempting to force state agencies to reduce, if not eliminate, the use of these chlorides (typically at the cost of increased driving hazards). With respect to the corrosion aspects of chloride application, cracks that occur in the roadway/bridge pavement allow water to seep into the pavement carrying the chloride to the rebar with the resultant increase in corrosion. In tandem with these efforts has been the continuing use of embedded fiber optic sensors for identification of faults or cracks within a highway structure-i.e., structural health monitoring. In this paper, we present multiple-parameter sensing fiber optic sensors which may be embedded into roadway and bridge structures to provide an internal measurement and assessment of its health. Such issues are paramount in determining if remedial or preventative maintenance should be performed on such structures. Laboratory results, comparisons with conventional sensing methods as well as a review of real-world issues in highway sensing are presented.

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“…These processes also exist in other kinds of fibre-reinforced composite materials [5][6][7]. On the other hand, it is also found that interfacial damage in reinforced concrete will be accelerated by corrosive media and steel corrosion has a significant influence on the performance and service life of reinforced concrete structures [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Simulation of interfacial fatigue of reinforced concrete under different loading cases

Shi¹,

Zhang²

2004

Modelling Simul. Mater. Sci. Eng.

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Interfacial fatigue of reinforced concrete under tension fatigue loading is simulated based on the shear-lag model. The effects of degradation of concrete strength, the loading frequency and the stress ratio as well as corrosive environment on the interfacial fatigue are considered and discussed. It is found that: (1) degradation of concrete strength and corrosive environment result in opposite effects on interfacial fatigue. (2) Degradation of concrete strength will result in larger effects on interfacial damage in low stress ratio than that in high stress ratio. (3) With a decrease of loading frequency, interfacial corrosion damage will remarkably increase though loading frequency has a small effect on fatigue crack growth in inert media.

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Corrosion of reinforcement in concrete construction

Cited by 6 publications

References 0 publications

Properties of Geopolymer Concrete from Local Fly Ash (FA) and Palm Oil Fuel Ash (POFA)

Properties of Geopolymer Concrete from Local Fly Ash (FA) and Palm Oil Fuel Ash (POFA)

Corrosion detection in reinforced concrete roadways and bridges via embedded fiber optic sensors

Simulation of interfacial fatigue of reinforced concrete under different loading cases

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