Water Migration Phenomenon in Concrete in Postpeak Region

Oshita, Hideki; Tanabe, Tada-aki

doi:10.1061/(asce)0733-9399(2000)126:6(573)

Cited by 14 publications

(6 citation statements)

References 6 publications

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“…Rossi [19] and Zheng and Li [20] explained the increase of strength under impact loading based on Stefan effect that the cohesive stress induced by water in cracks inhibited the growth of cracks. According to Oshita and Tanabe [21], the volume strain of concrete was the most significant factor affecting pore water pressure, and the pore pressure accelerated crack development. Shen and Xu [22] were in favor that the increase of porosity enhanced the impact of moisture content on strength, proposing a strength-porosity-saturation model based on the Ryshkewitch [23] model.…”

Section: Introductionmentioning

confidence: 99%

Influence of High Water Pressure on Static and Dynamic Compressive Strength of Concrete

Zhou

Zhao

Nie

et al. 2020

Advances in Civil Engineering

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In this paper, an experimental study was conducted on the influence of water pressure on concrete strength. Specimens were put in a self-designed device, applying 0–4 MPa water pressure on concrete, and then taken out for both static and dynamic compressive tests. Results showed that high water pressure caused inevitable damage to concrete, leading to 13.4% reduction in strength under 4 MPa water pressure. Specimens with lower strength grade were damaged more severely while under the same water pressure. Also, as water pressure increased, the moisture content of concrete grew linearly, and the trend for specimens with higher compressive strength was slower. A correlation was established between the water content increment and the reduction rate of strength. Moreover, the dynamic compressive strength decreased as water pressure increased but still higher than the static strength, illustrating an apparent strain rate effect. Meanwhile, water pressure and moisture content increment barely had any influence upon DIF within the testing conditions. Furthermore, equations for calculating both static and dynamic reduction rates of strength were built, based either on water pressure or on moisture content increment caused by that. Equations for strength prediction were also provided.

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Section: Introductionmentioning

confidence: 99%

Influence of High Water Pressure on Static and Dynamic Compressive Strength of Concrete

Zhou

Zhao

Nie

et al. 2020

Advances in Civil Engineering

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“…76 For static loading, pore water tends to flow, which promotes concrete cracking and microcracks propagation. 9,42,77,78 Figure 8 shows the changes in internal micro-structure of concrete under different pore water pressures and different water pressure duration. 42 It can be seen that with the increase of pore water pressure and the extension of duration, the microcracks propagation is more obvious.…”

Section: Internal Pore Water Effectmentioning

confidence: 99%

“…The pore water in the concrete will deform or flow under the influence of compressive loads, and this difference in pore water behavior is related to the loading rate 76 . For static loading, pore water tends to flow, which promotes concrete cracking and microcracks propagation 9,42,77,78 . Figure 8 shows the changes in internal micro‐structure of concrete under different pore water pressures and different water pressure duration 42 .…”

Section: Effect Of Water Pressure On Concrete Strengthmentioning

confidence: 99%

Evolution characteristics and mechanism of concrete performance under water pressure environment: A comprehensive review

Xue

Tong

Alam

et al. 2023

Structural Concrete

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Compared with the ground service environment, the evolution of concrete performance under a water pressure service environment is quite complex with variable conditions. Because of the coupling effect of load and pressure, water has a special impact on the strength and deformation of concrete. Meanwhile, harmful ions usually react with the cement matrix as pressure water seepages into concrete, resulting in the reduction of concrete durability. Based on this, this study provides a comprehensive review of the strength, deformation, and durability of concrete under water pressure environment. It is found that microcracks in concrete tend to propagate and connect after exposure to water pressure, leading to a decrease in strength and deformation performance. The average loss rate of strength and elastic modulus increased by 12.15% and 10.97%, respectively, when water pressure increased by 1 MPa. However, the loading process of water‐confining pressure makes concrete more compact, where the static and dynamic mechanical performance can be improved. Besides, due to the enhancement of excess pore water pressure, concrete strength under a high strain rate increases by 61.79% compared to static load. The effect of water pressure increases the ability of the liquid to penetrate concrete, and corrosive ions trapped within the liquid and freeze–thaw caused by external temperature changes would further reduce the concrete durability. This study points out that static and dynamic loading characteristics and durability of concrete under multi‐factor coupling in a water pressure environment will be the future research direction. The summarized contents can provide guidance for construction and research of concrete engineering under a water pressure environment.

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“…e particles of the foamed concrete are separated in different directions by the forces, and thus the cohesion between particles reduces, leading to the decrease of the compressive strength [23]. Simultaneously, the water pressure in the foamed concrete pore is equal to the wedge under the static load, resulting in reducing the strength of the material [24]. erefore, the compressive strength and the elastic modulus decrease with increase of the volumetric moisture content for the same dry density of the foamed concrete under the compound actions.…”

Section: Effect Of Volumetric Moisture Content On Mechanicalmentioning

confidence: 99%

Experimental Study on the Effect of Water on the Properties of Cast In Situ Foamed Concrete

Zhao

Wang

et al. 2018

Advances in Materials Science and Engineering

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This study aims to investigate the effect of water on the properties of cast in situ foamed concrete with a dry density of 300–800 kg/m3 (100 kg/m3 is a gradient). Firstly, the shrinkage deformation with the curing time and the volumetric moisture content is studied by the drying shrinkage test and improved drying shrinkage test. Secondly, the influence of volumetric moisture content on mechanical properties is assessed. At last, the effects of immersion time and immersion type on the mechanical properties of foamed concrete are studied by considering the water-level conditions. The achieved results show that the shrinkage deformations increase with the curing time for the drying shrinkage test and the improved drying shrinkage test, while the variations are different. The shrinkage deformation increases with the decrease of volumetric moisture content for six dry densities of foamed concrete. Besides, it gradually changes in the early stage, while it changes fast in the later stage. The compressive strength and elastic modulus decrease with the increase of volumetric moisture content for each density. For the water-level unchanged condition, the compressive strength and elastic modulus initially decrease and then slowly increase with the increase of the immersion time. For the water-level changed condition, the compressive strength and elastic modulus of foamed concrete decrease with the increase of immersion time for each dry density, and the rate of early attenuation is high, whereas the rate of later attenuation is limited.

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Water Migration Phenomenon in Concrete in Postpeak Region

Cited by 14 publications

References 6 publications

Influence of High Water Pressure on Static and Dynamic Compressive Strength of Concrete

Influence of High Water Pressure on Static and Dynamic Compressive Strength of Concrete

Evolution characteristics and mechanism of concrete performance under water pressure environment: A comprehensive review

Experimental Study on the Effect of Water on the Properties of Cast In Situ Foamed Concrete

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