Sulfate attack of Portland cement concrete under dynamic flexural loading: A coupling function

Yu, Demei; Guan, Bowen; He, Rui; Xiong, Rui; Liu, Zhuangzhuang

doi:10.1016/j.conbuildmat.2016.02.052

Cited by 40 publications

(22 citation statements)

References 16 publications

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“…The RDME did not seem to be a sensitive indicator to evaluate the sulfate resistance of concrete at beginning. It corroborated the results of Yu et al that the trend of RDME did not match the variation of strength in the early period of sulfate attack. On the one hand, the experimental error could be existed due to the weak filling effect.…”

Section: Resultssupporting

confidence: 91%

Influence of compressive fatigue on the sulfate resistance of slag contained concrete under steam curing

Yan

Yang

Jiang

et al. 2019

Structural Concrete

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This paper investigated the influence of compressive fatigue on the sulfate resistance of slag (0, 20, 50, and 70%) contained concrete under steam curing. After 10,000 cycles loading of 0.5, 0.6, and 0.7 stress level, the concrete was exposed to 5% Na 2 SO 4 for 540 days. The compressive strength, relative dynamic modulus of elasticity (RDME) and SO 4 2− contents were tested after sulfate immersion. Results showed that the standard-cured fatigued concrete had less strength reduction than the steam-cured fatigued concrete during sulfate attack. The steam-cured fatigued concrete containing 20% slag suffered the largest strength reduction, followed by the concrete containing 50, 70, and 0% slag. Compressive fatigue at high stress level (0.7) accelerated the sulfate deterioration of PC standard-cured concrete, while the effect of low stress level (0.5) was minor. The RDME was not a sensitive indicator to access the sulfate resistance of concrete at the beginning of immersion. Compressive fatigue distinctly promoted the sulfate diffusion; the effective SO 4 2− diffusion coefficient was increased when damage occurred in slag concrete. Besides, based on the fatigue damage, an experimental model of the sulfate deterioration of fatigued concrete was proposed. K E Y W O R D S compressive fatigue, slag concrete, steam curing, sulfate resistance

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Section: Resultssupporting

confidence: 91%

Influence of compressive fatigue on the sulfate resistance of slag contained concrete under steam curing

Yan

Yang

Jiang

et al. 2019

Structural Concrete

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“…The coupling function of sulphate erosion and flexural loading on ordinary Portland cement concrete has been explored. 14,15 The experimental results demonstrated that the combination action would accelerate the damage process. However, there is hardly any research aiming at the effect of sulphate erosion on the flexural fatigue of geopolymer concrete up to now.…”

Section: Introductionmentioning

confidence: 94%

Effect of sulphate attack on the flexural fatigue behaviour of fly ash–based geopolymer concrete

Long

Zhang

Chen

et al. 2018

The Journal of Strain Analysis for Engineering Design

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In this work, the erosion effect of sulphate solution on the flexural fatigue behaviour of fly ash-based geopolymer concrete was investigated. Under cyclic bending loading, the effect of sulphate attack on the fatigue life of geopolymer concrete was analysed using the static flexural strength as the damage index. Results revealed that the fatigue life of geopolymer concrete after sulphate erosion was significantly reduced compared with uncorroded samples under the same fatigue loading condition. And the fatigue life of corroded/uncorroded geopolymer concrete can be approximately described by the two-parameter Weibull distribution model. Since the sulphate attack would increase the actual stress level of corroded geopolymer concrete, a fatigue equation considering the damage index was deduced to predict the fatigue life of geopolymer concrete after sulphate attack.

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“…With the fast development of construction in civil engineering nowadays, reinforced concrete structures are being built all over the world, in which marine concrete structures occupy a significant position due to the applications of marine resources playing an increasingly important role in the national economy [1][2][3][4]. The properties of concrete materials in marine environments are affected by chloride salt and sulfate attack, microbial corrosion, as well as the permeability and diffusivity of concrete materials [5][6][7]. This has drawn great attention from researchers.…”

Section: Introductionmentioning

confidence: 99%

“…This has drawn great attention from researchers. The intrusion of negative ions, such as chloride and sulfate ions, reduce the service life of concrete structures and cause great losses in the economy, restraining the development of marine engineering [7][8][9]. The effect of environment and concrete characteristics on the transposition of chloride into reinforced concrete has been studied by both researchers and engineers for several years [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Protective Mechanism of Silane on Concrete upon Marine Exposure

Zhang

Liu

et al. 2019

Coatings

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Due to the high chloride ion concentration in marine environments, chloride ions can penetrate into concrete, along with the transportation of water molecules, and thus, cause rebar corrosion. This is an important reason for the decrease in the concrete durability. In this paper, by means of the sol–gel synthesis method, a silane emulsion, a silane compound emulsion, and silane compound gel were prepared by using isobutyl triethoxysilane and ethyl orthosilicate (TEOS) as the main raw materials. These silane materials were coated on a concrete surface and then placed in the marine exposure sites of Wheat Island, in Qingdao, for one year. The results show that these silane materials can effectively inhibit the chloride ions transporting in concrete. Upon the increase of the exposure time, the protection ability of the silane emulsion declined gradually, while the silane compound emulsion had stable protective effects. In comparison with the permeability coefficient of chloride ions in the blank test block, the permeability coefficient of chloride ions in the test block coated with the silane emulsion, the composition of silane emulsion, and silane compound gel fell off around 20%, 30%, and 50%, respectively. The test results indicate that the three kinds of protective materials have good inhibition abilities against chloride ion transportation, on which the compound gel had the best effect.

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Sulfate attack of Portland cement concrete under dynamic flexural loading: A coupling function

Cited by 40 publications

References 16 publications

Influence of compressive fatigue on the sulfate resistance of slag contained concrete under steam curing

Influence of compressive fatigue on the sulfate resistance of slag contained concrete under steam curing

Effect of sulphate attack on the flexural fatigue behaviour of fly ash–based geopolymer concrete

Protective Mechanism of Silane on Concrete upon Marine Exposure

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