Review of heat resistant concrete

Chen, Shubei

doi:10.1088/1742-6596/2608/1/012014

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…Heat-resistant concrete is currently being used for the manufacture of prefabricated elements, as well as monolithic structures. Examples of its rational use in industry can be multi-pod furnaces for burning sulfur pyrite, coarse dust collectors and dust chambers, covers of the ABM-1.5A unit, lining of pro table superstructures, furnaces with a boiling ( uidized) layer, lining of trolleys of tunnel furnaces [12].…”

Section: Methodsmentioning

confidence: 99%

Experimental Studies of Heat Resistance and Compressive Strength of Heat-Resistant Concrete

Apshikur,

Goltsev,

Alimkulov

et al. 2024

Preprint

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The research purpose of the work is to extend the service life by experimental study of the performance of the liquid-layer furnace. Here, instead of large and small aggregates, the effect of the use of secondary refractory substances in reducing the cost of the concrete mixture is studied. The value of the study is to prove that heat-resistant concrete meets the technological requirements of a liquid-layer furnace, as well as experimental confirmation of the possibility of using secondary refractory materials as heat-resistant concrete aggregates. To solve this problem, it was proposed to replace the traditional method of facing the boiling floor furnaces (Fireclay brick of the SHB brand) with a monolithic concrete version. Considering that the technological feature of the boiling layer of the furnace is a high temperature up to 1000°C and an aggressive environment that causes SO3 gaseous sulfur, one of the well-known types of heat-resistant concretes, the sodium-infused liquid glass concrete type is selected as the base, and instead of cement, it is recommended to use liquid glass with low thermal conductivity, such as a material in the amorphous phase and a glass-layered composite viscous substance.

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Section: Methodsmentioning

confidence: 99%

Experimental Studies of Heat Resistance and Compressive Strength of Heat-Resistant Concrete

Apshikur,

Goltsev,

Alimkulov

et al. 2024

Preprint

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“…On the other hand, refractory castables and ordinary Portland cement-based concretes share similarities despite their physical differences. Both materials contain inorganic oxides and serve essential structural purposes [ 1 , 15 ]. However, unlike Portland cement, where the types of minerals formed during hydration are unaffected by curing duration and temperature, the hydration of CAC results in the formation of various crystalline and amorphous hydrates, primarily influenced by the curing temperature [ 16 ].…”

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

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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.

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“…Despite the differences in their physical properties, refractory castables and ordinary Portland cement concrete share some similarities. Both materials are made of inorganic ceramic oxides used for structural purposes [14,15]. The reinforcement principles describe another similarity between these materials, although research on refractory materials focuses on corrosion problems [16].…”

Section: Introductionmentioning

confidence: 99%

“…However, to the authors' knowledge, there has been no research on the bond performance of steel bars in refractory castables. This information is essential for developing reliable numerical models and efficient building structures where components of refractory material can protect the integrity of the building under fire and explosion actions [15,21,22].…”

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.

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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.

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Review of heat resistant concrete

Cited by 4 publications

References 2 publications

Experimental Studies of Heat Resistance and Compressive Strength of Heat-Resistant Concrete

Experimental Studies of Heat Resistance and Compressive Strength of Heat-Resistant Concrete

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

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