Mechanical, Swelling, and Thermal Properties of Geopolymer Mixture Containing Basic Oxygen Furnace Slag Aggregates

Tukaziban, Aizhan; Shon, Chang Seon; Orynbassarov, Islam; Sandybay, Saken; Syzdykov, Daniyar; Zhang, Dichuan; Kim, Jong Ryeol

doi:10.1088/1755-1315/1050/1/012021

Cited by 2 publications

(4 citation statements)

References 9 publications

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“…Depending on the conducted test type, samples in various shapes were prepared. All samples were air-cured under controlled room temperature (23 ± 2 • C) and humidity (70~80% RH) until each test period except for bar samples that were cured in the air only for the first day and after were submerged in water or 1 M NaOH solution at 80 • C [40].…”

Section: Mixture Proportions and Sample Preparationmentioning

confidence: 99%

“…These hydration reactions increased the volume, and additional stresses appeared in the samples. These stresses eventually led to crack derivation and breakage of the fresh BOFS mixture matrix [40,62].…”

Section: Expansion In the Watermentioning

confidence: 99%

“…The f-CaO and f-MgO occur through the process treated by blowing oxygen to remove carbon and other elements in hot molten iron. These free oxides expand during hydration, causing internal pressure, surface protrusion, and cracks [38][39][40]. This expanding propensity of BOFS limits the utilization of BOFS as construction materials.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Evaluation of Geopolymer Mixtures Containing Chronologically Aged Basic Oxygen Furnace Slags

Tukaziban,

Shon,

Zhang

et al. 2023

Sustainability

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Applying industrial by-products as a substitution for conventional construction materials (natural resources) is a superior solution for the environment in terms of waste management and reduction in greenhouse emissions and for the construction industry in terms of cost and expenditure. Applying basic oxygen furnace slag (BOFS), one of the metallurgical industry by-products, as a construction material can be a high-potential and promising idea. However, the utilization of BOFS in construction applications is considerably limited because of its inherent characteristics leading to volumetric expansion behavior caused by the chemical reaction between free lime (f-CaO) and water. This study used geopolymer technology to stabilize the expansive behavior of chronologically aged BOFS aggregates. The compressive strength, expansion behavior, and drying shrinkage characteristics of a normal ordinary Portland cement (OPC) mixture and a geopolymer mixture containing siliceous river sand and chronologically aged BOFS aggregates were investigated. The test results showed that the compressive strength of geopolymer mixtures containing chronologically aged BOFS aggregate achieved 64.02 MPa, and the expansion behavior of geopolymer mixtures was improved compared with normal OPC mixtures containing the same BOFS aggregates, reaching 0.02% and 0.44%, respectively. However, due to the air-curing method, geopolymer mixtures had higher drying shrinkage values than normal OPC mixtures. Therefore, further studies should be conducted to investigate how to control the drying shrinkage of geopolymer mixtures containing chronologically aged BOFS aggregate.

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Section: Mixture Proportions and Sample Preparationmentioning

confidence: 99%

Section: Expansion In the Watermentioning

confidence: 99%

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Synthesis and Evaluation of Geopolymer Mixtures Containing Chronologically Aged Basic Oxygen Furnace Slags

Tukaziban,

Shon,

Zhang

et al. 2023

Sustainability

Self Cite

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“…If this stress exceeds the tensile strength of the mortar mixture, it results in cracks within the mortar mixture matrix. The networking and propagation of cracks eventually break the mortar specimen [15].…”

Section: Abrasion Resistance and Aggregate Crushing Value Aggregate A...mentioning

confidence: 99%

Use of Basic Oxygen Furnace Slag (BOFS) in Superpave Mix Design: BOFS Aggregate Properties

Shon,

Kim,

Kissambinova

et al. 2023

KEM

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This research aims to evaluate the properties of basic oxygen furnace slag (BOFS) as aggregates used in Superior Performing Asphalt Pavements (Superpave) mix design. A total of five different aggregates, including one limestone and four BOFS aggregates with different ages, were evaluated by the following aggregate properties: specific gravity, water absorption, Los Angles abrasion, aggregate crushing value, angularity, flakiness, soundness (sulfate chemical and freeze-thaw resistance), and expansion characteristics. Then, the volume stability of the hot mix asphalt (HMA) mixture was also discussed based on the aging effect of BOFS aggregate. Test results indicated that aged BOFS aggregate performs better than unaged BOFS aggregate: Aged BOFS aggregate has lower water absorption, lower aggregate crushing value, higher abrasion resistance, and less expansion. The flakiness and angularity of BOFS aggregates were satisfied with Superpave criteria. However, if free-lime (f-CaO) and free magnesium (f-MgO) in BOFS aggregate exist, it may cause the volume stability of asphalt mixtures with BOFS aggregate. In conclusion, if BOFS is appropriately aged and weathered, BOFS can be an alternative to conventional aggregate.

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Mechanical, Swelling, and Thermal Properties of Geopolymer Mixture Containing Basic Oxygen Furnace Slag Aggregates

Cited by 2 publications

References 9 publications

Synthesis and Evaluation of Geopolymer Mixtures Containing Chronologically Aged Basic Oxygen Furnace Slags

Synthesis and Evaluation of Geopolymer Mixtures Containing Chronologically Aged Basic Oxygen Furnace Slags

Use of Basic Oxygen Furnace Slag (BOFS) in Superpave Mix Design: BOFS Aggregate Properties

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