Long-term behaviors of concrete under low-concentration sulfate attack subjected to natural variation of environmental climate conditions

Zhang, Zhongya; Jin, Xiaoguang; Luo, Wei

doi:10.1016/j.cemconres.2018.11.017

Cited by 132 publications

(42 citation statements)

References 46 publications

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“…Many research studies have been carried out to investigate the mechanism [12][13][14][15], deformation, and mechanical properties of concrete [16], modulus variation [17], influence factors [18], external load [19], erosion form [20], and so on. For example, Gong et al [21] presented the stressstrain relation of concrete under the coupled effects of sustained loading, sulfate attack, and dry-wet cycle, and they proposed a calculation method for the stress-strain relation of concrete under the action of sulfate attack and dry-wet cycle.…”

Section: Introductionmentioning

confidence: 99%

Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment

Liu

Chen

et al. 2020

Mathematical Problems in Engineering

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The effects of erosion mode, erosion age, and concentration of sulfate solution on mechanical properties of concrete were investigated. The dimensionless relationship model of the stress-strain of concrete on the basis of randomness was proposed. The variation of the elasticity modulus and Poisson’s ratio of the concrete surface attacked by sulfate was studied, and a novel method of using a superficial parameter to characterize the performance change of the concrete surface was recommended. The results showed that the dimensionless relationship model of stress-strain of concrete could be used to represent the variations of mechanical properties of concrete. The differences of load-displacement of concrete before and after sulfate attack were reflected as the change of curve’s slope and ultimate bearing capacity, and the slope of a straight section of the lateral and longitudinal strain curves of concrete surface also varied. The increment rates of ultimate bearing capacity of concrete attacked by 1% and saturated sulfate solution were about 30% and 10%, respectively. However, the decreasing ratio of the ultimate bearing capacity of concrete attacked by saturated sulfate solution was approximately 25%. The damage factor of the elasticity modulus of the concrete surface of C20 and C40 was 0.185 and −0.19, respectively. The obtained results could provide a support for investigating the variations of stress-strain relationship and mechanical performance of concrete under a sulfate environment.

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Section: Introductionmentioning

confidence: 99%

Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment

Liu

Chen

et al. 2020

Mathematical Problems in Engineering

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“…The presence of sulphates in the soil at high rates leads to problems such as attacking cement, which leads to complex compounds with it. This crystallization process is accompanied by an increase in the size of the concrete resulting in the destruction of the concrete blocks [36].…”

Section: Total Soluble Salts Ratiomentioning

confidence: 99%

Study and GIS-Based Mapping of Soil Chemical Properties in Kirkuk City, Iraq

Sulyman¹,

Noori²,

Al-Attar³

2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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The study included selecting seven sites in Kirkuk city to determine the soil chemical properties characteristics. The samples were collected and analyzed laboratory for the period from November 2016 and for three months at the rate of three samples per site. The main objective is to study the chemical properties of the soil of the selected areas. Also, the GIS technique has used to predict soil maps. However, soil chemical properties have analyzed for samples. The highest measurement concentrations of chemical properties (pH, Electrical conductivity, organic material, total soluble salts, gypsum, total carbonates, nitrates, chlorides and sulphates) were (9, 1695 µS/cm, 6.488%, 847.5%, 3.57%, 6 mg/l, 1290 mg/l and 4.57 mg /l) respectively. Furthermore, Inverse Distance Weighting (IDW) interpolation technique has used to produce geotechnical maps of the study area. The soil in the study area tends to be basal According to the chemical properties measurements.

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“…e long-term performance of geotechnical structure should not be neglected [68]. One of the mains characteristics of TTAs is that it may occur creep under the long-term action of the design load (or even less than design load), while the TTA in hard rock only occur creep under the long-term action of several times the design load.…”

Section: Long-term Stabilitymentioning

confidence: 99%

A Comprehensive Review of the Mechanical Behavior of Suspension Bridge Tunnel-Type Anchorage

Han

Liu

Wei

et al. 2019

Advances in Materials Science and Engineering

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The recent surge of interest towards the mechanical response of rock mass produced by tunnel-type anchorage (TTA) has generated a handful of theories and an array of empirical explorations on the topic. However, none of these have attempted to arrange the existing achievements in a systematic way. The present work puts forward an integrative framework laid out over three levels of explanation and practical approach, mechanical behavior, and calculation method of the ultimate pullout force to compare and integrate the existing findings in a meaningful way. First, it reviews the application of TTA in China and analyzes its future development trend. Then, it summarizes the research results of TTA in terms of load transfer characteristics, deformation characteristics, failure modes, and calculation of ultimate uplift resistance. Finally, it introduces four field model tests in soft rock (mainly mudstone formations), and some research results are obtained. Furthermore, it compares the mechanical behavior of TTA in hard rock strata and soft rock strata, highlighting the main factors affecting the stability of TTA in soft rock formation. This paper proposes a series of focused topics for future investigation that would allow deconstruction of the drivers and constraints of the development of TTA.

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Long-term behaviors of concrete under low-concentration sulfate attack subjected to natural variation of environmental climate conditions

Cited by 132 publications

References 46 publications

Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment

Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment

Study and GIS-Based Mapping of Soil Chemical Properties in Kirkuk City, Iraq

A Comprehensive Review of the Mechanical Behavior of Suspension Bridge Tunnel-Type Anchorage

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