Reducing Volume Expansion of Steel Slag by Using a Surface Hydrophobic Waterproof Structure

A stress-chemistry method was used to investigate the expansion behavior of mortars made with steel slag sand (SSM). The results indicated that periclase and free CaO were the main mineral components resulted in expansion of SSM by means of volume increment and local stress concentration after hydration. So it can be concluded that stress concentration arised from enrichment and uneven distribution of expansile mineral components was the main reason resulted in the volume expansion of SSM. Model of expansion of SSM was built according to the characteristics of crack and types of versicolor particles.

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Use of steel slag as a granular material: Volume expansion prediction and usability criteria

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2010.08.071 ◽

2010 ◽

Vol 184 (1-3) ◽

pp. 555-560 ◽

Cited By ~ 173

Author(s):

George Wang ◽

Yuhong Wang ◽

Zhili Gao

Keyword(s):

Granular Material ◽

Volume Expansion ◽

Steel Slag ◽

Material Volume ◽

Usability Criteria

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Steel slag aggregate concrete filled-in FRP tubes: Volume expansion effect and axial compressive behaviour

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.125961 ◽

2022 ◽

Vol 318 ◽

pp. 125961

Author(s):

Peng Feng ◽

Zhiyuan Li ◽

Shanbao Zhang ◽

Jia-Qi Yang

Keyword(s):

Volume Expansion ◽

Steel Slag ◽

Aggregate Concrete ◽

Compressive Behaviour ◽

Frp Tubes ◽

Expansion Effect

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Corrosion Resistance of MgO-ZrO2 Brick and MgO-Cr2O3 Brick Compared by Rotating Slag Attacking Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.184-185.805 ◽

2012 ◽

Vol 184-185 ◽

pp. 805-809

Author(s):

Song Lin Chen ◽

Lin Yuan ◽

Zhong Qi Feng ◽

Xi Jun Liu ◽

Jia Lin Sun ◽

...

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Molten Steel ◽

Rotary Kiln ◽

Volume Expansion ◽

Steel Slag ◽

Dense Layer ◽

Environment Friendly ◽

Resistance Performance ◽

Better Than

An environment-friendly material MgO-ZrO2 brick which is hoped to substitute for MgO-Cr2O3 brick was investigated. The using effects of MgO-ZrO2 brick and MgO-Cr2O3 brick were compared by rotating slag attacking method whose environment is similar to the environment in RH degasser. It indicates that the corrosion resistance performance of MgO-ZrO2 brick is better than that of MgO-Cr2O3 brick. Due to the effect of molten steel, slag and oxygen, Fe being oxidized to FeO or Fe2O3 at high temperature 1900K will produce volume expansion which results in MgO-Cr2O3 brick being cracked. At the same time, Cr2O3 will be decomposed to CrO3 gas, which will be evaporated seriously by the airflow and lead to MgO-Cr2O3 brick structural loosen and deterioration, ultimately. While the activity of oxygen dissolved molten steel is extremely low and ZrO2 is stable in the rotary kiln at 1900K. Furthermore, ZrO2 will react rapidly with CaO and its product CaZrO3 will form dense layer to prevent MgO-ZrO2 brick from being corroded. Therefore, trial production of MgO-ZrO2 brick applied for RH degasser is recommended.

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Radiation Damage Studies with the HVEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100096655 ◽

1972 ◽

Vol 30 ◽

pp. 680-681

Author(s):

J. J. Laidler ◽

B. Mastel

Keyword(s):

Radiation Damage ◽

Stainless Steels ◽

Volume Expansion ◽

Austenitic Stainless Steels ◽

Test Facility ◽

Fast Breeder Reactors ◽

Breeder Reactors ◽

Under Construction ◽

Development Laboratory ◽

Insight Into

One of the major materials problems encountered in the development of fast breeder reactors for commercial power generation is the phenomenon of swelling in core structural components and fuel cladding. This volume expansion, which is due to the retention of lattice vacancies by agglomeration into large polyhedral clusters (voids), may amount to ten percent or greater at goal fluences in some austenitic stainless steels. From a design standpoint, this is an undesirable situation, and it is necessary to obtain experimental confirmation that such excessive volume expansion will not occur in materials selected for core applications in the Fast Flux Test Facility, the prototypic LMFBR now under construction at the Hanford Engineering Development Laboratory (HEDL). The HEDL JEM-1000 1 MeV electron microscope is being used to provide an insight into trends of radiation damage accumulation in stainless steels, since it is possible to produce atom displacements at an accelerated rate with 1 MeV electrons, while the specimen is under continuous observation.

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