Study on the Sulfate Erosion Behavior of Cement-based Materials with Different Water-to-binder Ratios Containing Stone Powder in a Low-Temperature Saline Soil Area

Yu, Bentian; Zhou, Hui; Xia, Junying; Liu, Xiaolin; Xie, Chao; Zhang, Kai

doi:10.1007/s12205-023-0146-5

Cited by 3 publications

(1 citation statement)

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“…The environmental corrosion process of concrete is very complex and slow, and the corrosion degree and corrosion mechanism of concrete structures are different in different corrosion environments [1][2][3][4]. There are different mechanisms of sulfate attack on concrete and concrete cracking in four environments: soluble cations, magnesium ions, low temperature, humid or carbonized environment, and the dry-wet cycle [5]. Different sulfate concentrations will lead to different corrosion mechanisms of sulfate on concrete [6,7].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Bearing Capacity of Concrete Pile Composite Foundation under Composite Salt Erosion

Wang,

Yang,

Zhang

et al. 2024

Buildings

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In order to study the long-term bearing capacity of concrete pile composite foundation in the Salt Lake area, based on the Tehran Isfahan high-speed railway project in Iran, the full (semi) immersion drying test and rapid freeze-thaw test was carried out, and the specimens were scanned by electron microscope. Numerical calculations were used to study the effects of different pile strengths and design parameters on the long-term bearing capacity of the composite foundation. The main conclusions were as follows: The concrete specimens in the adsorption zone deteriorated earlier and faster. In the rapid freeze-thaw tests, the strength attenuation of high-strength (C40, C50) specimens was smaller than that of low-strength specimens (C20). Within 20 years after construction, the additional settlement of low-strength (C20) piles was 12.21 mm, while high-strength concrete was less affected by deterioration. With pile spacing ranging from 1.8 m to 4.5 m, the maximum increase in additional settlement under the C20 condition was about 20 mm. The pile-soil stress ratio under the three conditions increased by 2.42, 6.59, and 8.63. As the pile length and diameter increased, the peak stress of the pile body moved towards the pile end, and the changes in the pile-soil stress ratio under the three conditions were similar.

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