Effect of damage evolution on poisson's ratio of concrete under sulfate attack

Song, Hui; Chen, Jiankang

doi:10.1016/s0894-9166(11)60022-0

Cited by 19 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High performance concrete (HPC) is a new type of concrete with the advantages of high durability, high strength, and high working performance, which is widely used in highway tunnels, underground passages, and coastal constructions [ 1 , 2 , 3 ]. In such a harsh environment, the HPC structures are continuously exposed to sulfate attack, which is well known to damage the physical and mechanical properties of concrete [ 4 , 5 , 6 , 7 , 8 ]. By penetrating to the porosities, sulfate ions can react with the hydration of cement such as calcium hydroxide, calcium silicate hydrates and calcium aluminate hydrates, then crystallized to form gypsum, ettringite and thaumasite [ 5 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of High Performance Concrete Mixed with Nano-Silica in Front of Sulfate Attack

Nie

et al. 2022

Materials

View full text Add to dashboard Cite

Nano-silica (NS) is an effective material to improve the strength and durability of high-performance concrete (HPC), but little information is available regarding its role in HPC response to long-term sulfate attack. In this study, six different dosages of NS (0%, 1%, 2%, 3%, 4%, and 5%) as cement partial replacement were mixed into HPC and the casted specimens were soaked in sulfate solution for different periods (0, 100, 200, and 300 days). The mass change, dynamic elastic modulus, compressive and splitting strength, microstructure morphology, and porosity characteristics of HPC specimens were measured by mass tests, mechanical properties tests, scanning electron microscopy (SEM), and nuclear magnetic resonance (NMR) tests. The results showed that the incorporation of NS decreased the mass loss, elevated the compressive and splitting strength, and reduced the porosity formation of HPC in front of sulfate attack. The percentage of 1% NS was among the most effective dosages as, after soaking for 300 days, it decreased the mass loss by 13.5%, elevated the elastic modulus as well as compressive and splitting strength by 50.4%, 31.7%, and 69.8% in comparison of unmodified HPC, respectively. The sulfate attack resistance was delayed in a higher (2–5%) mixed dosage, mainly due to the agglomeration of nano particles, especially after long-term reactions. This study can provide experimental references regarding the performance of HPC mixed with NS in front of sulfate attack.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of High Performance Concrete Mixed with Nano-Silica in Front of Sulfate Attack

Nie

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…At 25 C, the diffusion coefficient of sulfate ions in water is 1.07 Â 10 À9 m/s 2 . 58 Song et al 59 believed that the expansion of cement mortar by sulfate corrosion resulted in damage to the cement mortar, and its porosity could be expressed by the initial porosity and volume fraction of damage. In fact, the porosity of cement mortar in the process of sulfate corrosion is changed not only by damage but also by hydration of the cement mortar.…”

Section: Ionic Diffusion Coefficient Of Sulfate In Mortarmentioning

confidence: 99%

Diffusion model of sulfate ions in concrete based on pore change of cement mortar and its application in mesoscopic numerical simulation

Zhuang

Liu

Zhou

et al. 2022

Structural Concrete

View full text Add to dashboard Cite

Sulfate attack is a major cause of the deterioration of concrete structures.Accurately predicting the temporal and spatial distribution of sulfate ions in concrete is the basis for revealing the mechanism of concrete performance deterioration caused by sulfate attack. In this article, based on the pore change caused by sulfate damage to cement mortar, a diffusion model of sulfate ions in cement mortar considering changes in surface concentration was established. Furthermore, a two-dimensional mesoscopic concrete model composed of cement mortar, coarse aggregate, the intrafacial transition zone (ITZ) and macroscopic defects, which can reflect the real aggregate shape, was constructed to study the diffusion of sulfate ions in concrete. The correctness of the model is verified with existing experimental data, and the model is further studied. The results show the following. (1) The average value of the calculation results of multiple sets of models can be used to eliminate the influence of the randomness of the construction of the two-dimensional mesoscopic concrete model. ( 2) With increasing stone content, the corrosion depth increases, but the average concentration at a given location decreases. (3) With increasing sulfate solution concentration and water-cement ratio, the sulfate ion concentration and the corrosion depth in concrete increase.

show abstract

“…where Ds0 is the diffusion coefficient of sulfate ions in a porous medium, φw is the porosity of concrete which changes with the hydration process of cement, defined by Eq. ( 6) [85], Da is the damage evolution caused by ESA, defined by Eq. ( 7) [57].…”

Section: External Sulfate Ingressmentioning

confidence: 99%

Numerical investigation of external sulfate attack and its effect on chloride binding and diffusion in concrete

Zhang

Chen

et al. 2021

Construction and Building Materials

View full text Add to dashboard Cite

Effect of damage evolution on poisson's ratio of concrete under sulfate attack

Cited by 19 publications

References 18 publications

Analysis of High Performance Concrete Mixed with Nano-Silica in Front of Sulfate Attack

Analysis of High Performance Concrete Mixed with Nano-Silica in Front of Sulfate Attack

Diffusion model of sulfate ions in concrete based on pore change of cement mortar and its application in mesoscopic numerical simulation

Numerical investigation of external sulfate attack and its effect on chloride binding and diffusion in concrete

Contact Info

Product

Resources

About