Effects of fluidal fly ash on abrasion resistance of underwater repair concrete

Horszczaruk, Elżbieta; Brzozowski, P.

doi:10.1016/j.wear.2017.01.051

Cited by 38 publications

(12 citation statements)

References 22 publications

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“…This trend is in good agreement with the data reported by others. Naik et al 8 reported that the abrasion resistance of concrete added with a dosage of fly ash less than 30 wt% was comparable to that of concrete without fly ash, whereas beyond a dosage of 30 wt%, fly ash would negatively affect the abrasion resistance. Cai et al 6 found that although the addition of fly ash decreased considerably the early compressive strength and abrasion resistance of concrete, whereas the long-term strength and abrasion resistance of concrete containing less than 20 wt% fly ash could exceed those of plain cement concrete.…”

Section: Abrasion Resistancementioning

confidence: 99%

“…In fact, the erosion and abrasion damages of concrete in spillway, the flood discharge tunnel and the overflow surface of the hydropower stations are very common in the worldwide [5][6][7] . The abrasion resistance of concrete is therefore one of the most important factors determining the reliability even the safety of the dams, which has gained great research interests in recent decades 3,[5][6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

“…proper mixture proportion and improved curing conditions, and so on. 3,[5][6][7][8][9][10][11] . Among all the methods proposed above, enhancement of the concrete strength is usually considered to be the most effective one, because there is a linear relationship between the abrasion resistance and the compressive strength of concrete 6,12 .…”

Section: Introductionmentioning

confidence: 99%

“…As a result, fly ash is widely used in hydraulic mass concrete to reduce or prevent the early cracking risk 3,6,12 . Many authors 6,8,23 have evaluated the influence of fly ash on the compressive strength and abrasion resistance of concrete, and found that an appropriate addition of fly ash (no more than 25 %) favors the development of strength and the abrasion resistance.…”

Section: Introductionmentioning

confidence: 99%

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Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

et al. 2021

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Dam concrete suffers from serious abrasion damages in southwestern China, the abrasion resistance of concrete is therefore one of the most important factors determining the reliability even the safety of the dams. In the present work, the effects of fly and/or silica fume on the mechanical properties, drying shrinkage, as well the cracking and abrasion resistance of concrete were investigated, then the pore structures of concrete added with fly ash and silica fume and the pore surface fractal dimensions (Ds) were determined by the mercury intrusion porosimetry (MIP) method and a fractal model, respectively. Finally, the relationships between the abrasion resistance of concrete and the porosity as well as the Ds were revealed and discussed. The results indicate that silica fume significantly increases the drying shrinkage especially at early age, while the incorporation of fly ash and silica fume together can decease the early plastic shrinkage-induced cracking risk and the final shrinkage to some degrees. Besides, the utilization of 5 wt% silica fume and 20 wt% fly ash together increases the abrasion resistance and mechanical property by about 4-9 % at various ages. In addition, the compressive strength and the abrasion resistance of concrete are linearly correlated with the concrete porosity and the Ds. Both the fly ash and silica fume could decrease the porosity of concrete and increase the Ds, therefore the concrete containing fly ash

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Section: Abrasion Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

et al. 2021

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“…However, the actual service environment of concrete is very complex, such as high temperature, low temperature, water immersion and dry environment. At present, fly ash has also been widely used in the hydraulic concrete [5][6], so the variation of compressive strength of cement mortars with different waterbinder ratio and fly ash content under water immersion was investigated in this paper. In addition, the mechanical strength, permeability, thermal conductivity and durability of materials depend on the pore structure parameters such as porosity and pore diameter distribution [7][8].…”

Section: Introductionmentioning

confidence: 99%

Correlation between Compressive Strengths and Water Absorption of Fly Ash Cement Mortar Immersed in Water

Huang

Zhao

2019

Archives of Civil Engineering

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The compressive strength and water absorption of cement mortars with different water-binder ratio (0.35, 0.45 and 0.55) and fly ash content (0, 10%, 20% and 30%) under water immersion were investigated, and the correlation between them was further analyzed. The internal microstructure and phase composition of mortar was studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The resultsshow that the inside of mortar mixed with fly ash displayed the loose and porous microstructure. Therefore, the incorporation of fly ash reduced the compressive strength of mortar, especially the early strength, and the strength decreased with the increase of fly ash content, and the water absorption of mortar also increased. There was a linear correlation between the compressive strength and water absorption of mortar with the equation: f c = -3.838β + 62.332, where f c and β represented the compressive strength and water absorption, respectively. Therefore, when the water absorption of mortar immersed in water was measured, its corresponding compressive strength could be preliminarily inferred through this equation, which was of great significance for detecting and identifying the stability and safety of hydraulic structures.

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Experimental and Numerical Investigations on Concrete Abrasion of Hydraulic Structures

Liu¹,

Wu²

2023

RILEM Bookseries

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Effects of fluidal fly ash on abrasion resistance of underwater repair concrete

Cited by 38 publications

References 22 publications

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

Correlation between Compressive Strengths and Water Absorption of Fly Ash Cement Mortar Immersed in Water

Experimental and Numerical Investigations on Concrete Abrasion of Hydraulic Structures

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