A study on the change in frost resistance and pore structure of concrete containing blast furnace slag under the carbonation conditions

Ding, Zhenzhao; Quy, Nguyen Xuan; Noguchi, Takumi; Kim, Jihoon; Hama, Yukio

doi:10.1016/j.conbuildmat.2022.127295

Cited by 26 publications

(3 citation statements)

References 44 publications

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“…Durability should therefore be understood as the period of time during which the level of performance of a structure is maintained above a critical value for a given period of its use. Furthermore, the durability of concrete has always been attracted wide attention in the construction field because it is connected with safety, economy and sustainability [2].…”

Section: Durability Of Concretementioning

confidence: 99%

Carbonation of concrete cover of reinforcement as a cause of loss of durability of structures

2023

Archives of Civil Engineering

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The article discusses the physical and chemical mechanisms of the carbonation phenomenon itself, as well as points out the synergistic effect of frost destruction and concrete carbonation on reinforced concrete elements. Examples of structural damage from engineering practice in the diagnosis of reinforced concrete structures are presented. Two cases of frost and carbonation damage of precast reinforced concrete elements are analyzed. It was noted that the most common cause of damage to concrete structures is the lack of frost resistance. Carbonation of concrete leads to deprivation of the protective properties of the concrete lagging against the reinforcing steel. The examples cited include precast elements that, for technical reasons, had a relatively small lagging thickness. The first one relates to the thin walled elevation elements, which are exploited during 60 years and the second relates to the energetic poles with very advanced concrete corrosion damage. The examples given of corrosion of concrete and reinforcement of elements indicate that synergistic environmental interactions can intensify the destruction of elements.

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Section: Durability Of Concretementioning

confidence: 99%

Carbonation of concrete cover of reinforcement as a cause of loss of durability of structures

2023

Archives of Civil Engineering

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“…(Zhang et al, 2017;Wu et al, 2021;Xu et al, 2024). In recent years, this technology has been widely used in block maintenance (Meng et al, 2019), freeze-thaw resistance (Ding et al, 2022), resistance to dissolution damage (Zhang et al, 2021b), recycled aggregate reinforcement (Ahmad et al, 2023), and enhancing the performance of reinforced concrete as well as fibre concrete, etc., (Salvatore, 2021;Xian et al, 2022). Seo et al (Seo et al, 2018) investigated the long-term performance of the carbonationconditioned cement mortar in an acidic aggressive environment, and the results showed that carbonation-conditioned cement mortar in a sulphuric acid-aggressive environment will generate calcium sulfate precipitation to replace calcium alumina, which will lead to the formation of calcium sulfate precipitate, and thus the carbonation-conditioned cement mortar will have a higher strength in a short period.…”

Section: Introductionmentioning

confidence: 99%

Research on the resistance of cement-based materials to sulfate attack based on MICP technology

Zhang,

Peng,

et al. 2024

Front. Mater.

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To evaluate the effect of Microbial Induced Calcium Carbonate Precipitation (MICP) on the enhancement of early resistance to sulfate attack of cementitious materials. In this paper, firstly, the effect of Bacillus subtilis (BM) on the carbonation depth as well as the carbonation rate of standard as well as carbonation-conditioned cementitious sand specimens was investigated. Secondly, the compressive strength and volumetric deformation of the specimens at different ages of immersion in sulfate solution were investigated. Finally, the changes of hydration products before and after the addition of BM were analyzed by X-ray diffraction analysis (XRD), and the microscopic pore structure of the specimens after erosion was analyzed by low-field nuclear magnetic resonance (LF-NMR) and scanning electron microscope (SEM), which revealed the mechanism of the improvement of BM on the resistance to sulfate erosion of the cementitious materials. The results showed that the initial compressive strength of BM carbonised curing specimens, ordinary carbonised curing specimens and BM standard curing specimens were increased by 42.0%, 34.0% and 4.0%, respectively, compared with the ordinary standard curing specimens, respectively, compared with the control group, and the loss of the final compressive strength was reduced by 37.4%, 25.4%, and 14.5%, and the expansion rate was reduced by 31.3%, 22.0%, after sulfate erosion for 6 months, 5.2%, and porosity decreased by 24.2%, 13.6%, and 9.9%. Microbial mineralization accelerated the reaction between Ca2+ in the pore solution and atmospheric CO2, and the calcite formed filled the pores to make the structure denser, increasing the initial compressive strength of the specimens and reducing the loss of properties when exposed to sulfate solution. Therefore, the application of MICP technology in cementitious materials provides a new direction for the development of durable and sustainable cementitious materials.

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“…A review of the literature shows that most of the existing studies have focused on reducing production costs by co-milling clinker and various industrial waste slags that have been heat-treated. For example, the production of belite (C2S) is less energy intensive (25% lower) and emits 10-15% less CO2 compared to alite (C3S) [6].…”

Section: Introductionmentioning

confidence: 99%

Construction of Durable Roadsrom Rolled Concrete Based on Belite Slag Cement and Binders

Asmatulayev¹

2023

GEOMATE

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Roads for wheeled vehicles are one of the main types of transportation infrastructure required for economic activity. The construction of road pavements with cement concrete requires the use of modern, expensive concrete-laying machines. The complexity of this construction technology can be an impediment to using these materials. The main reason for the complexity of the technology, is the use of traditional Portland cement, with a fast-setting time. This paper presents a study of the strength properties of belite cement. The samples were investigated under normal conditions, at constant low positive and negative temperatures according to the specified curing regimes. The results of the study show that the development of the strength of belite cement can exceed conventional concrete. Concrete based on belite binder at 90 days has similar strength as conventional concrete. While the conventional concrete stopped gaining strength at 30 days, the strength of the slag concrete based on belite cement binder continued to increase for 15 months.

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A study on the change in frost resistance and pore structure of concrete containing blast furnace slag under the carbonation conditions

Cited by 26 publications

References 44 publications

Carbonation of concrete cover of reinforcement as a cause of loss of durability of structures

Carbonation of concrete cover of reinforcement as a cause of loss of durability of structures

Research on the resistance of cement-based materials to sulfate attack based on MICP technology

Construction of Durable Roadsrom Rolled Concrete Based on Belite Slag Cement and Binders

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