Thermophysical properties of concrete for nuclear-safety related structures

Vodák, F.; Černý, Robert; Drchalová, J.; Hošková, Šárka; Kapičková, O.; Michalko, O.; Semerák, Petr; Toman, J.

doi:10.1016/s0008-8846(97)00033-1

Cited by 20 publications

(12 citation statements)

References 2 publications

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“…It results in scattering of a great number of phonons, more heat resistance of lattice wave vibration and shorter average free path p l and poorer heat conduction properties of RPC. The HSC and HPC contain a certain number of large-size coarse aggregates (see Figure 6 (b) [69,81,86]). The thermal conductivity of coarse aggregate ranges between 2.1-2.9 W/(m K) and is about 1.5-4 times larger than that of cement paste, which is 0.72 W/(m K) [102].…”

Section: Thermophysical Mechanism Of the Variation Of Thermal Conductmentioning

confidence: 99%

Investigation on thermophysical properties of reactive powder concrete

Liu

et al. 2011

Sci. China Technol. Sci.

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The thermophysical properties, such as thermal conductivity, thermal diffusivity, specific heat capacity and linear thermal expansion of reactive powder concrete (RPC) with different steel fiber volumetric fractions are investigated by means of high temperature tests. The thermophysical characteristics of RPC with different fiber volumes under different temperatures are analyzed and compared with those of the common high-strength concrete and high-performance concrete. The empirical relationships of thermophysical properties with temperature and fiber volume are identified. By the heat transfer and solid physics methods, the microscopic physical mechanism of heat transfer process and heat conduction properties of RPC are investigated, and the theoretical formulas of specific heat capacity and thermal expansion coefficient are derived, respectively. The effects of temperature and steel fibers on the specific heat capacity and the thermal expansion coefficient are quantitatively analyzed and the discriminant conditions are provided. It is shown that the experimental results are consistent with the theoretical prediction. reactive powder concrete (RPC), thermophysical properties, high temperature, fiber reinforcement, heat conduction, specific heat capacity, thermal expansion coefficient Citation: Ju Y, Liu H B, Liu J H, et al. Investigation on thermophysical properties of reactive powder concrete.

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Section: Thermophysical Mechanism Of the Variation Of Thermal Conductmentioning

confidence: 99%

Investigation on thermophysical properties of reactive powder concrete

Liu

et al. 2011

Sci. China Technol. Sci.

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“…Factors affecting the shape of stress-strain curve are the type of binder and aggregate, the type of admixtures and aggregate, the aggregate-cement ratio and storage conditions (Bournazel and Miranville, 1997;Desai, 1998). It was found that the loss in structural quality of concrete due to a rise of temperature is influenced by its degradation through changes induced in basic processes of cement hydration and hardening of the binding system in the cement paste of concrete (Cong and Kirkpatrick, 1995;Vodak et al, 1997). The sensitivity of C-S-H gel to achieved temperature level is evident from average C-S-H composition at 25 • C C 1.88 SH 1.52 and at 100 • C C 2.04 SH 0.98 .…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on structural quality of the cement paste and high-strength concrete with silica fume

Janotka

Nürnbergerová

2005

Nuclear Engineering and Design

128

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“…Water permeability coefficient tested with PCK method was adopted to test water diffusivity inside band materials [9]. Approximate linearity relation exists between accumulative absorption and extraction of time [10], which is…”

Section: Experimentation Methodsmentioning

confidence: 99%

Degradation of permeability resistance of high strength concrete after combustion

Kao

Qian

2008

Front. Archit. Civ. Eng. China

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To evaluate the remaining durability of concrete materials after combustion, the permeability of high strength concrete (HSC) after combustion was studied. The transport behavior of chloride ion, water and air in concrete after combustion and the effect of temperature, strength grade, and aggregation on the permeability of HSC after combustion are investigated by chloride ion permeability coefficient (D c ), water permeability coefficient (D w ) and air permeability coefficient (D a ). The experiment results show that all three permeability coefficients commendably reflect changes of permeability. The permeability coefficient increases with the evaluation temperature. After the same temperature, the permeability coefficient of HSC is lower than that of normal strength concrete (NSC). However, the degree of degradation of permeability coefficient of HSC is greater than that of NSC. The permeability resistance of HSC containing limestone is better than that of HSC containing basalt. Combining changes of compressive strength and permeability, the remaining durability of concrete materials after combustion is appropriately evaluated.

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Thermophysical properties of concrete for nuclear-safety related structures

Cited by 20 publications

References 2 publications

Investigation on thermophysical properties of reactive powder concrete

Investigation on thermophysical properties of reactive powder concrete

Effect of temperature on structural quality of the cement paste and high-strength concrete with silica fume

Degradation of permeability resistance of high strength concrete after combustion

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