Potential for the Inclusion of Sustainability Aspects in Limit States for Concrete

Hrabová, Kristýna; Vořechovská, Dita; Teplý, Břetislav

doi:10.5593/sgem2020/6.1/s26.054

Cited by 2 publications

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“…De La Fuente et al [22] developed a method for analyzing the sustainability of different concrete and reinforcement configurations for segmental linings of TBM tunnels. Hrabova et al [23] used the sustainability approach to concrete mix assessment via the sustainability-potential indicator. In addition, green construction technology is applied to many engineering fields, such as underground railways [24], water supply construction [25], and the metallurgical industry [26].…”

Section: Introductionmentioning

confidence: 99%

The Principles and Evaluation of Green Construction of Tunnels in Frigid Plateau Regions

Li,

Liang,

Zhao

et al. 2023

Sustainability

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Green construction is an advanced concept and development trend in engineering construction. It is cold and arid in frigid plateau regions in western China, where the ecological environment is vulnerable to engineering constructions and other human activities. Hence, the time and cost for environmental remediation are much larger than in other areas. Based on the principles and category of green construction, this paper discusses the overall and partial relationship between green construction and green construction operation, presents the technical construction process of the green construction of a tunnel, and puts forward the key points of green construction with the construction practice for tunnels in frigid plateau regions as the engineering background. The main contents and results are as follows: (1) The breakthrough points of the research on green construction include five first-level evaluation indicators of savings the land, energy, water resources, materials, and human resources, as well as protection for personnel health and environment, i.e., five savings and two protections. A comprehensive evaluation system suitable for green construction is proposed and established. (2) The paper summarizes the following essential aspects: the fine classification and safety evaluation of surrounding rock, the changes in the seepage field in the construction process, and the establishment of a standardized construction system. (3) A green construction evaluation was conducted on the tunnel of the Yindajihuang Project, and the green evaluation results were obtained. The evaluation results are basically consistent with the actual situation. In addition, intelligent construction technology should be the orientation of green construction for tunnels. The research would be helpful to the implementation of green construction ideas and technologies for tunnels in frigid plateau regions and the persistence of green and sustainable development.

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Section: Introductionmentioning

confidence: 99%

The Principles and Evaluation of Green Construction of Tunnels in Frigid Plateau Regions

Li,

Liang,

Zhao

et al. 2023

Sustainability

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“…Flexural loads have different influences on the chloride ion transport performance of concrete [ 10 ]. Hrabova et al studied reinforced beams under a long-term static loading state (three-point bending), coupled with a chloride ingress, and proposed potential limit states in a sustainability design [ 11 ]. Gowripalan et al concluded that the chloride ion erosion rate in the tension zone is higher than that in the compression zone under a flexural load [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sulfate Concentration on Chloride Diffusion of Concrete under Cyclic Load

Feng

2022

Materials

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The existence of chloride ions, sulfate ions, and vehicle dynamic loads may lead to a shortened service life and premature failure of the road and bridge structures in northwestern China. Immersed in a dual-salt solution while simultaneously applying cyclic flexural loads, the free chloride ion concentration and erosion depth in concrete specimens were measured. The influence of the sulfate concentration on the apparent surface chloride concentration (Cs) and apparent diffusion coefficient (Dapp) was studied. An exponential model was used to fit the Cs, and the influence of sulfate concentration on the Cs was analyzed. The result showed that cyclic loading and solution concentration were two primary factors affecting chloride diffusion. Meanwhile, compared with the emersion conditions, dynamic loading would induce significantly accelerated chloride ion penetration. Under the coupling effect of sulfate and dynamic loading, as the sulfate concentration increased, the chloride ion concentration and erosion depth were both decreased. The existence of sulfate ions improved the chloride ion penetration resistance of concrete. The results provide insight in designing concrete in regions where multiple salt ingression (sulfate and chloride) is a major durability issue of the structures.

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Potential for the Inclusion of Sustainability Aspects in Limit States for Concrete

Cited by 2 publications

References 0 publications

The Principles and Evaluation of Green Construction of Tunnels in Frigid Plateau Regions

The Principles and Evaluation of Green Construction of Tunnels in Frigid Plateau Regions

Effect of Sulfate Concentration on Chloride Diffusion of Concrete under Cyclic Load

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