Residual expansion deformation of high-speed railway steam-cured concrete: mechanism, modeling, and measurement

Xiang, Yu; He, Jionghuang

doi:10.1007/s43452-021-00281-9

Cited by 6 publications

(1 citation statement)

References 39 publications

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“…Compared with standard curing concrete, early steam cured concrete had larger dynamic elastic modulus and shear modulus. Xiang, Y et al [5] analysed the residual expansion deformation characteristics of fresh concrete during steam curing process. The results showed that the compressive strength, dynamic elastic modulus and dynamic shear modulus of concrete under steam curing increased rapidly.…”

Section: Introductionmentioning

confidence: 99%

Influence of different curing conditions on water absorption of cement-based materials under dry and wet cycles

WANG¹,

Guo²

2022

Mater. Res. Express

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As the main structural material of a subway, the precast concrete segment is produced under the steam-curing condition, and frequently experienced dry–wet cycles environment. In this study, steam-curing and dry–wet cycling methods were used to simulate the water absorption process of cement-based materials under special circumstances. The results showed that the water absorption in cement-based materials decreased with an increase in the number of dry–wet cycles. Based on a micro-analysis, the proportion of large capillary pores (dimension >0.1 μm) in the steam-cured mortar increased during the water absorption process with the increase in the number of dry–wet cycles compared with the standard cured mortar. Through thermodynamic and kinetics analysis, the mechanism and model were calculated to explain the component transformation mechanism of cement-based materials under dry and wet cycles.

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Section: Introductionmentioning

confidence: 99%

Influence of different curing conditions on water absorption of cement-based materials under dry and wet cycles

WANG¹,

Guo²

2022

Mater. Res. Express

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Optimization of steam curing process for Chinese Western and Northeast regions' high‐speed railway concrete prefabricated components

Xiang,

Duan,

Wang

et al. 2024

Structural Concrete

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This article aims to address the issues of high curing temperatures and thermal damage in the production of prefabricated concrete components for high‐speed railways in high‐altitude and high‐latitude cold regions of China. Various steam‐curing processes for concrete are designed to optimize the high‐quality preparation process of steam‐cured concrete prefabricated components in cold environments. With the goal of controlling the residual expansion deformation and considering the overall impact of curing process on the mechanics, durability, and interface transition zone of steam‐cured concrete, the main conclusions obtained in this study are as follows. Within a pre‐curing time of 3–6 h, when the curing temperature is maintained at 45–60°C, the final residual expansion deformation can be controlled below 300 με. The compressive strength, dynamic elastic modulus, peak stress, water absorption and Chloride ion resistance of steam‐cured concrete show the great improvement under above curing processes. Curing at 80°C should be actively avoided, and it is recommended to adopt a 6 h pre‐curing time with a maximum curing temperature of 45°C, especially for cold regions in China. This study can serve as a valuable reference and provide support for the preparation of prefabricated concrete components in Chinese high‐altitude and high‐latitude areas.

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Study on the effect of dynamic flexural load on the electrical resistivity of concrete

Zhu

Zeng

Lan

et al. 2023

Archiv.Civ.Mech.Eng

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Residual expansion deformation of high-speed railway steam-cured concrete: mechanism, modeling, and measurement

Cited by 6 publications

References 39 publications

Influence of different curing conditions on water absorption of cement-based materials under dry and wet cycles

Influence of different curing conditions on water absorption of cement-based materials under dry and wet cycles

Optimization of steam curing process for Chinese Western and Northeast regions' high‐speed railway concrete prefabricated components

Study on the effect of dynamic flexural load on the electrical resistivity of concrete

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