Effect of Temperature on Thermal Properties of Ultrahigh-Performance Concrete

Kodur, Venkatesh; Banerji, Subir; Solhmirzaei, Roya

doi:10.1061/(asce)mt.1943-5533.0003286

Cited by 56 publications

(35 citation statements)

References 36 publications

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“…14 The influence of temperature on the thermal properties of UHPC was reported in a recent study. 15 Literature review on the high-temperature mechanical properties of UHPC [16][17][18][19][20][21] shows that there is substantial variance associated with the experimental setup and test procedures, including varying specimen size, heating rate, moisture content, and concrete mix proportions adopted in the reported studies. This wide disparity is owing to the lack of standardized testing procedures and limitation in testing equipment for measuring mechanical properties of concrete at high temperatures.…”

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confidence: 99%

Effect of temperature on mechanical properties of ultra‐high performance concrete

Banerji

Kodur

2021

Fire and Materials

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High temperature mechanical property data are needed for evaluating fire resistance of structural members. Being a relatively new construction material, there is a lack of temperature-dependent mechanical property data on ultra-high performance concrete (UHPC). To address this knowledge gap, this paper presents results from an experimental study on the effect of temperature on mechanical properties of UHPC.Specimens made of two UHPC mixes: one with only steel fibers (UHPC-S) and the other with hybrid fibers, that is, both steel and polypropylene (UHPC-H), were tested under different heating conditions in 20 to 750 C temperature range. Compressive strength, tensile strength, stress-strain response, and elastic modulus of UHPC were evaluated at various temperatures. Results generated from these property tests on UHPC were compared with property relations specified in design codes for conventional normal strength concrete (NSC) and high strength concrete (HSC). The comparisons show that UHPC experiences faster degradation in compressive strength and elastic modulus as compared to conventional concrete. However, UHPC exhibits slower degradation in tensile strength and ductility at elevated temperatures due to the presence of steel fibers. Data generated from these property tests were utilized to propose relations for expressing the mechanical properties of UHPC as a function of temperature and these relations can be used as input to numerical models for evaluating fire resistance of structures made of UHPC.

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Effect of temperature on mechanical properties of ultra‐high performance concrete

Banerji

Kodur

2021

Fire and Materials

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“…UHPC is not recommended for use in high-temperature applications. Similarly, another study reported that the specific heat capacity of UHPC is slightly lower than that of conventional concrete [109].…”

Section: Thermal Properties Of Uhpcmentioning

confidence: 83%

“…This means that a high temperature in the concrete will be reached much sooner in UHPC than in conventional concrete. A study also observed that the thermal conductivity of UHPC is higher than that of conventional concrete [109]. The specific heat capacity of UHPCs is often lower than that of conventional PCs (again a denser material and with lower moisture content).…”

Section: Thermal Properties Of Uhpcmentioning

confidence: 96%

Ultra-High-Performance Concrete (UHPC): A State-of-the-Art Review

Ullah

Yuan

Ahmad³

et al. 2022

Materials

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The interest of researchers in UHPC has increased over the past decade. It is crucial to understand the structural behavior of reinforced UHPC (R/UHPC) components under various loading conditions before they can be used as a replacement for conventional concrete. Although several studies on ultra-high-performance concrete (UHPC) have been conducted, the knowledge is scattered, and no one can easily judge the performance and methodology of UPHC. Therefore, the purpose of this study was to review the research studies already carried out on UHPC. The review focuses on the materials’ physical and chemical composition, mechanical and durability characteristics, fire resistance, and environmental benefits of UHPC. Design considerations for effectively utilizing UHPC in structural elements are also presented. The best UHPFRC mixture is obtainable with a steel fiber content of 2–3% and a water-to-cement ratio of 0.2–0.3. The review also discusses the essentials recommendation for future research on UHPC.

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“…For this purpose, generation of data similar to that provided in NUREG/CR-7031 [34] can be a good initial objective. These could be developed for normal weight concrete to start with and then expanded to include high-performance concrete [38,39], self-compacting concrete [40], highdensity concrete [31], lightweight concrete [41,42], etc. There are several international studies on spalling behaviour of concrete exposed to fire [43,44], and few report [48], as this is a concern area for concrete structures in fire/elevated temperature [49], particularly high-strength and high-density concrete [50].…”

Section: Generation Of Fire/elevated Temperature Test Data For Indianmentioning

confidence: 99%

Fire Resistance and Elevated Temperature in Reinforced Concrete Members: Research Needs for India

Dauji

Kulkarni

2021

J. Inst. Eng. India Ser. A

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Fire and elevated temperature are important considerations for design of concrete structures, for both normal and nuclear facilities. In India, the present design guidelines for concrete subjected to fire and elevated temperature are limited to prescriptive minimum dimension and minimum cover. The other approach suggested is fire test based, and being resource intensive, is considered only for special cases of design. The various provisions of Indian standards are discussed and compared to the international standards. Fire test data for concrete/reinforcement properties at elevated temperature for Indian materials are scarce, and hence, the calculation methods are difficult to apply for Indian concrete. Validation of such methods for India is required, which again can only happen after generation of adequate database. The article highlights the present research needs for fire design of Indian concrete, along with development of analysis methodologies/guidelines for fire design of concrete structures, assessment of fire-affected concrete structures, and combination of the fire/temperature load with other extreme loads such as impact, seismic load, or missile load using advanced approaches. This article could serve as reference for designers as well as the starting point for several research initiatives in India and thereby is expected to improve the state of the art of fire design of concrete structures in India in the long term.

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Effect of Temperature on Thermal Properties of Ultrahigh-Performance Concrete

Cited by 56 publications

References 36 publications

Effect of temperature on mechanical properties of ultra‐high performance concrete

Effect of temperature on mechanical properties of ultra‐high performance concrete

Ultra-High-Performance Concrete (UHPC): A State-of-the-Art Review

Fire Resistance and Elevated Temperature in Reinforced Concrete Members: Research Needs for India

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