Influence of crack width, cover depth and concrete quality on corrosion of steel in HPC containing corrosion inhibiting admixtures and fly ash

2018 ◽  
Vol 88 ◽  
pp. 200-210 ◽  
Author(s):  
H.Z. Lopez-Calvo ◽  
P. Montes-García ◽  
V.G. Jiménez-Quero ◽  
H. Gómez-Barranco ◽  
T.W. Bremner ◽  
...  
Keyword(s):  
Fly Ash ◽  
Crack Width ◽  
Cover Depth ◽  
Concrete Quality ◽  
Corrosion Of Steel

scholarly journals Assessing the Durability of Concrete with the Addition of Low Quality Fly Ash

2019 ◽  
Vol 3 (1) ◽  
pp. 43-47
Author(s):  
Ali Ajwad ◽  
Usman Ilyas ◽  
Nouman Khadim ◽  
Abdullah ◽  
Muhammad Usman ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Fly Ash ◽  
Life Span ◽  
Positive Impact ◽  
Steel Reinforcement ◽  
Structural Elements ◽  
Concrete Carbonation ◽  
Useful Life ◽  
Corrosion Of Steel ◽  
Durability Of Concrete

The life span of a structure is basically determined by its durability. Over the course of time, concrete carbonation and corrosion of steel reinforcement lead to weakness in concrete’s structural elements andhence reduce its useful life. The addition of fibers in concrete can act as barrier and delays the activation of these processes. In this study, low quality fly ash was added to concrete to check its effect on the durabilityof concrete. It was found that the addition of low quality fly ash with an activator does have a positive impact on carbonation and reinforcement of corrosion resistance.

scholarly journals Effect of Vietnamese Fly Ash on Selected Physical Properties, Durability and Probability of Corrosion of Steel in Concrete

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 593 ◽  
Author(s):  
Chinh Van Nguyen ◽  
Paul Lambert ◽  
Quang Hung Tran
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Acid Resistance ◽  
Steel Corrosion ◽  
Strength Loss ◽  
Reinforced Concrete Beams ◽  
Partial Replacement ◽  
Nacl Solution ◽  
Fly Ash Concrete ◽  
Corrosion Of Steel

Vietnamese fly ash was used as a partial replacement for ordinary Portland cement in the proportions of 10%, 20% and 40%, while the water to cementitious ratios were kept constant at 0.42, 0.5 and 0.55, respectively, for three groups. The compressive strengths of all mixes were determined up to 90 days. The acid resistance of fly ash concrete was examined by the mass loss and compressive strength loss of 100 × 100 × 100 mm3 cubes immersed in a 10% H2SO4 solution. The probability of steel corrosion in the fly ash concrete was assessed by measuring the half-cell potentials of steel bars within beams dimensions of 100 × 100 × 500 mm3, and the flexural strengths of these beams after 300 days of immersion in a 5% NaCl solution were determined. The results demonstrate that the compressive strength of fly ash concrete is reduced at an early age but increases as the concrete continues to hydrate. The fly ash increases the sulfuric acid resistance of concrete. Fly ash additions have only a limited effect on reducing the risk of probability of corrosion of steel in the concrete. The load capacities of 10% and 20% fly ash reinforced concrete beams are higher than that of the control beams after 300 days immersed in a 5% NaCl solution.

Influence of Crack Geometry and Crack Width on Carbonation of High-Volume Fly Ash (HVFA) Mortar

2021 ◽  
pp. 59-67
Author(s):  
Tim Van Mullem ◽  
Laurence De Meyst ◽  
Jessica P. Handoyo ◽  
Robby Caspeele ◽  
Nele De Belie ◽  
...  
Keyword(s):  
Fly Ash ◽  
Crack Width ◽  
High Volume ◽  
Crack Geometry ◽  
High Volume Fly Ash
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