Improved explosion resistance of low cement refractory castables using drying agents

Peng, Hong; Myhre, Bjørn

doi:10.1002/ces2.10118

Cited by 3 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the 5CAC-ED composition presents higher intrinsic permeability after 100°C due to the fiber melting [22], the water can be more easily released even when its path from the samples' center to its surface is increased for the larger samples. Therefore, it is still possible to withdraw the releasing vapor at similar rates than the ones observed for the smaller samples.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the objective of the current study is to investigate the size effect on the dynamics of water removal during the drying of refractory castables through the macro thermogravimetry analysis (TGA) originally proposed by Peng et al [22]. This technique enables the examination of samples weighing up to 80 kg, enabling a comprehensive assessment of thermal evolution, mass loss, and their derivatives for refractory castable compositions of varying sizes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Can a laboratory experiment express the size effect on the drying of refractory castables?

Moreira,

Peng,

Pont

et al. 2023

Ceramics International

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Can a laboratory experiment express the size effect on the drying of refractory castables?

Moreira,

Peng,

Pont

et al. 2023

Ceramics International

View full text Add to dashboard Cite

“…The investigation by Suvorov et al [ 6 ] supported this inference, indicating that the SiO 2 modification improves the mechanical properties of refractory materials and enhances their thermal resistance. The micro-silica/alumina activation process also improves castables’ strength and sinterability temperature compared to the conventional alternatives [ 9 , 10 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Investigating the High-Temperature Bonding Performance of Refractory Castables with Ribbed Stainless-Steel Bars

Plioplys,

Antonovič,

Boris

et al. 2024

Materials

View full text Add to dashboard Cite

Refractory materials containing calcium aluminate cement (CAC) are commonly used in the metallurgical and petrochemical industries due to their exceptional mechanical resistance, even at temperatures exceeding 1000 °C, and do not require additional reinforcement. This study seeks to advance this practice by developing ultra-high-performance structures that offer building protection against fire and explosions. Such structures require bar reinforcement to withstand accidental tension stresses, and the bond performance becomes crucial. However, the compressive strength of these materials may not correlate with their bond resistance under high-temperature conditions. This study investigates the bond behavior of ribbed stainless austenitic steel bars in refractory materials typical for structural projects. The analysis considers three chamotte-based compositions, i.e., a conventional castable (CC) with 25 wt% CAC, a medium-cement castable (MCC) with 12 wt% CAC, a low-cement castable (LCC), and a low-cement bauxite-based castable (LCB); the LCC and LCB castables contain 7 wt% CAC. The first three refractory compositions were designed to achieve a cold compressive strength (CCS) of 100 MPa, while the LCB mix proportions were set to reach a CCS of 150 MPa. Mechanical and pull-out tests were conducted after treatment at 400 °C, 600 °C, 800 °C, and 1000 °C; reference specimens were not subjected to additional temperature treatment. This study used X-ray fluorescence (XRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM) methods to capture the material alterations. The test results indicated that the bonding resistance, expressed in terms of the pull-out deformation energy, did not directly correlate with the compressive strength, supporting the research hypothesis.

show abstract

“…The cast-on binder is known for its excellent ability to maintain the material's mechanical strength at 600-1000 • C [11]. Furthermore, compared to traditional alternatives, the microscale silica/alumina activation process enhances castables' strength and sinterability temperature [12,13].…”

Section: Introductionmentioning

confidence: 99%

Bond Behavior of Stainless-Steel and Ordinary Reinforcement Bars in Refractory Castables under Elevated Temperatures

Plioplys,

Kudžma,

Sokolov

et al. 2023

J. Compos. Sci.

View full text Add to dashboard Cite

Refractory castables, i.e., refractory aggregates and ultra-fine particle mixtures with calcium aluminate cement (CAC) and deflocculants, were created 40 years ago for the metallurgy and petrochemical industries. These materials demonstrate outstanding performance even over 1000 °C. Typically, they have no structural reinforcement, resisting compression stresses because of the combination of temperature and mechanical loads. This study is a part of the research project that develops high-temperature resistance composite material suitable for fire and explosion protection of building structures. However, this application is impossible without structural reinforcement, and the bond performance problem becomes essential under high temperatures. This experimental work conducts pull-out tests of austenitic stainless 304 steel bars and typical structural S500 steel bars embedded in refractory castables after high-temperature treatments. This study includes plain and ribbed bars and considers two castable materials designed with 25 wt% CAC content for 50 MPa compressive strength after drying (typical design) and 100 MPa strength (modified with 2.5 wt% microsilica). This test program includes 115 samples for pull-out tests and 88 specimens for compression. As expected, the tests demonstrated the plain bars’ inability to resist the bond stresses already at 400 °C; on the contrary, ribbed bars, even made of structural steel, could ensure a mechanical bond with cement matrix up to 1000 °C. However, only stainless steel bars formed a reliable bond with the high-performance castable, determining a promising object for high-temperature applications. Still, the scatter of the test results did not ensure a reliable bonding model. In addition, the castable strength might not be optimal to ensure maximum bond performance. Thus, the test results clarified the research objectives for further developing the reinforced composite.

show abstract

Improved explosion resistance of low cement refractory castables using drying agents

Cited by 3 publications

References 6 publications

Can a laboratory experiment express the size effect on the drying of refractory castables?

Can a laboratory experiment express the size effect on the drying of refractory castables?

Investigating the High-Temperature Bonding Performance of Refractory Castables with Ribbed Stainless-Steel Bars

Bond Behavior of Stainless-Steel and Ordinary Reinforcement Bars in Refractory Castables under Elevated Temperatures

Contact Info

Product

Resources

About