Study on the Influence of Blast Furnace Slag on Chloride Ion Penetration Property

Subpa-Asa, Prang; Kawamoto, Ken; Satoshi, F; Shigeyuki, D

doi:10.1088/1757-899x/840/1/012014

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…Therefore, BFS is also used as a fine aggregate or powder during construction [2]. In addition, concrete containing BFS has been found to have improved properties such as porosity, density, and long-term strength, and excellent resistance to sulfuric acid, frost damage, and salt damage [3][4][5][6][7]. Furthermore, it is known to have a high immobilization capacity for chloride ions and is expected to inhibit the penetration of chloride ions.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Salt Preventive Properties of Blast Furnace Slag with Different Blaine Values and Curing Condition

Mochida

Nito²,

Fujiwara³

et al. 2022

MSF

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Since sustainable development is becoming incredibly influential, the concrete and cement industries are reducing negative environmental impacts. Previous studies have reported salt damage effects on reinforced concrete structures on various methods to prevent salt damage. The solution is to substitute the raw materials required in cement with industrial by-products from manufacturing steel products, including blast furnace slag (BFS). Since it strengthens the concrete structure, the chloride ion penetration must also be considered. Using BFS with various Blaine values investigated the effect of BFS on blocking resistance and chloride ion penetration. This study focused on delaying the permeation of chloride ions and conducted a study using blast furnace slag. The cement replacing with blast furnace slag improves the salt preventive performance and detoxifies chloride ions. This study examined fluctuations in the blast furnace slag Blaine value affect the salt preventive property by steam curing condition. The result confirmed that the compressive strength increases as the blast furnace slag with a higher Blaine value are used also confirmed that the study improved the salt preventive performance by increasing the addition rate of the blast furnace slag fine powder.

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Section: Introductionmentioning

confidence: 99%

A Study on the Salt Preventive Properties of Blast Furnace Slag with Different Blaine Values and Curing Condition

Mochida

Nito²,

Fujiwara³

et al. 2022

MSF

View full text Add to dashboard Cite

show abstract

“…According to the previous study [2][3][4], drying shrinkage is the primary cause of cracking in concrete structures. The degree of cement hydration reaction is increased when BFS mixed cement is correlated with the amount of produced C-S-H gel.…”

Section: Introductionmentioning

confidence: 99%

The Study on Blast Furnace Slag on Different Conditions as Curing Condition and Blaine Value Ratio Influence Improving Strength Performance

Subpa-Asa

Nito²,

Fujiwara³

et al. 2022

MSF

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The sustainable building aims to minimize environmental impact by reducing carbon dioxide pollution by using by-products. Concrete materials are well-known for being the most extensively used construction material. Carbon dioxide emissions are the permissible greenhouse gas emissions that would have an impact on the long sustainability. Blast furnace slag reduces carbon dioxide emissions as an environmentally responsible building material, and sustainable steelmaking aims to minimize waste. Steel corrosion and chloride damage are several of the most apparent problems for concrete structure durability. Incorporating BFS into the cement is beneficial for concrete durability as the Structures' serviceability increased. This study aimed to explore the material properties and compressive strength of BFS mortar while considering the replacement ratio, Blaine fineness of the BFS, and curing conditions. This study mainly discovered that substituting BES for cement in the mortar increased the compressive strength and durability factor, indicating that the material's properties depend on the BFS, based on the experimental results, which cover the materials properties and salt preventive property. The low water-to-binder ratio (W/B) of the BFS-blended cement mixture is the reason for this. The study reported that the investigation of salt preventive by adding BFS with a low Blaine fineness and average substitution ratios (45%) could improve the compressive strength of BFS mortar samples. These mortar samples were even more resistant to carbonation, which could also be attributed to the hydration products of BFS.

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“…The major causes of the cracks generated in concrete structures is drying shrinkage [2], a previous study [3,4] which indicated that the drying shrinkage of blast furnace mixed cement is associated with the amount of produced C-S-H gel, meaning that the C-S-H gel may vary with cement hydration degree, which could be affected by cement type and curing age. The permeability of chloride ion into the reinforced concrete structure causes corrosion which result in shrinkage and cracking, reducing the performance cause to damage structure.…”

Section: Introductionmentioning

confidence: 99%

Basic Study on the Durability of Mortar Containing Blast Furnace Slag Fine Powder with Different Basicity

Subpa-Asa

Matsunaga

et al. 2021

KEM

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Chloride ions penetrated reinforced concrete structures. Corrosion of reinforcing bars occurs because of cracks due to corrosion expansion, which is a problem of chloride damage deteriorating structures' performance. Blast furnace slag (from now on referred to as "BFS") is the inevitable by-product of steel product manufacturing as sustainable materials. BFS is more effective in preventing corrosion of reinforcing bars in concrete due to the denser cured and its high ability to immobilize chloride ions. Thus, the influence of BFS on the durability of mortar using BFS powder with different basicity was studied by using "Standard on Test Methods for Chloride Ion Diffusion Coefficients in Concrete" by electrophoresis (Draft) (JSCE-G571-2003)" and the total chloride ion amount was measured following JIS R 5202. The result confirmed that the immobilization performance could be greatly improved by increasing the basicity. It was remarkable in the case of air curing, a curing method for available precast products.

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Study on the Influence of Blast Furnace Slag on Chloride Ion Penetration Property

Cited by 5 publications

References 1 publication

A Study on the Salt Preventive Properties of Blast Furnace Slag with Different Blaine Values and Curing Condition

A Study on the Salt Preventive Properties of Blast Furnace Slag with Different Blaine Values and Curing Condition

The Study on Blast Furnace Slag on Different Conditions as Curing Condition and Blaine Value Ratio Influence Improving Strength Performance

Basic Study on the Durability of Mortar Containing Blast Furnace Slag Fine Powder with Different Basicity

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