Application of X-CT Technology in the Microstructure Analysis of Cement-Based Materials

Ping, Zhang; Qin, Hong Gen; Wan, Keshu; Pang, Chao Ming; Sun, Wei; Zhou, Wei

doi:10.4028/www.scientific.net/amm.174-177.2061

Cited by 4 publications

(3 citation statements)

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“…Such a low content limits the large-scale application of copper tailing as mineral admixture in cement concrete, so it was urgent to find ways to improve the content of copper tailing in cement. Research showed that the pore structure has a significant impact on the mechanical properties and carbonation resistance [9], chloride ion erosion resistance [10,11,12,13], and other durability properties of cement concrete [14,15,16,17,18,19]. However, there is little research on the microscopic mechanism, especially on the pore structure of cement mortar with copper tailing (CMCT).…”

Section: Introductionmentioning

confidence: 99%

Effect of the Content of Micro-Active Copper Tailing on the Strength and Pore Structure of Cementitious Materials

Zhang

Liu²,

Song³

2019

Materials

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This study investigates the effect of micr-oaggregate filling with copper tailing on the pore structure of cement paste containing copper tailing (CPCT). The particle size of the CPCT and the pore structure of CPCT were analyzed by laser particle size analysis and mercury instruction porosimetry (MIP). Results showed that at the early stage of curing time, with increasing copper tailing content, the compressive strength of cement mortar with copper tailing (CMCT) was lower, and the porosity and pore diameter of CPCT were higher and greater; with the extension of curing age, when the content of copper tailing was less than 30%, the compressive strength of CMCT and the porosity of CPCT changed slightly with the increase of the content of copper tailing. However, the maximum hole diameter of CPCT decreased gradually (a curing age between 7 d and 365 d under standard conditions). Scanning electron microscopy analysis showed that at the early stage of cement hydration in the CPCT, the copper tailing did not fill the pores in CPCT well, while in the later stage of cement hydration, the microaggregates of copper tailing filled the pores well and closely combined with the surrounding hydration products. In the later stage of cement hydration, the microaggregate filling of copper tailing was primarily responsible for the strength increase of the CMCT.

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Section: Introductionmentioning

confidence: 99%

Effect of the Content of Micro-Active Copper Tailing on the Strength and Pore Structure of Cementitious Materials

Zhang

Liu²,

Song³

2019

Materials

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“…Recent advances in X-ray computer tomography contributed to the adoption of the technique in the field of cement and concrete research [ 7 , 8 ] and specifically, corrosion science [ 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. The technique allows visualization of processes inside concrete without the need of fracturing the samples.…”

Section: Introductionmentioning

confidence: 99%

Determination of Loss of Reinforcement Due to Corrosion through X-ray Computer Micro-Tomography

et al. 2021

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X-ray computer scanning tomography (CT scan) is an increasingly more available technique, which has been applied to material sciences for years. Although most of its use is qualitative for gaining insights on material behavior, quantitative analysis for estimations of deterioration rates is possible. This paper describes an unbiased, straightforward method to determine the amount of reinforcement lost to corrosion through the use of X-ray tomography without the need to remove the concrete cover. Other methods of assessment such as gravimetric analysis, half-cell potential, resistivity of mortar cover, corrosion current, and scanning electron microscopy (SEM) are used in the same samples for comparison. While the electrical and electrochemical tests are valuable to describe the state of the samples, those demonstrated poor capacity of determining the stage of corrosion of the reinforcement in terms of amount of material lost. Electron microscopy could determine how much of the reinforcement corroded with high accuracy; however, these results are deficient in representativity, being based on a single plane of the steel. X-ray tomography, while suffering from sample size limitation, could provide quantitative information on the total volume of material lost for each sample with far higher accuracy than indirect techniques, which is significant for the forensic determination of remaining life service of structures.

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“…One purpose of women who become environmental activists can do environmental communication to resolve environmental conflicts in Indonesia [5], women's leadership approach can increase community development in Malaysia [6] and the results of studies in Pakistan and the United States showing the contribution of women in building post-disaster resilience and promoting sustainable development [7]. In principle, the involvement of women in environmental the concept of SDGs corresponds to the point 5 and 11 that talks about the sustainability of the city [8].…”

Section: Introductionmentioning

confidence: 99%

Relation of Social Capital to Women’s Proactive Participation in the Community for Sustainability of River in Urban Areas

et al. 2018

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The aims of this paper to identify a relationship of social capital with the participation of women in their community to realize the sustainablity of rive in urban areas and to achieve resilience of the city. Efforts to increase women's participation in urban planning and environmental management require the support of social capital in local contexts to achieve sustainability of river in urban areas. The method used in this research is a quantitative approach, with this type of research is descriptive-explanatory. Data collection techniques in this study by conducting surveys with questionnaire disseminating and literature study. The research location was undertaken in DKI Jakarta as the metropolitan city has the complexity of problems because of the density of citizens and environmental degradation, especially in the river area. The result of this study shows the social capital of the community has a relation to the proactive participation of women. The activity of capacity building for women for environmental management need to strengthen the values of togetherness and trust to actors who are the drivers of citizens and the implementers of community empowerment. The implication of this study can be used for strategy in protecting of the river in urban areas to adopting a more environmentally friendly approach by integrating gender equality.

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Application of X-CT Technology in the Microstructure Analysis of Cement-Based Materials

Cited by 4 publications

References 0 publications

Effect of the Content of Micro-Active Copper Tailing on the Strength and Pore Structure of Cementitious Materials

Effect of the Content of Micro-Active Copper Tailing on the Strength and Pore Structure of Cementitious Materials

Determination of Loss of Reinforcement Due to Corrosion through X-ray Computer Micro-Tomography

Relation of Social Capital to Women’s Proactive Participation in the Community for Sustainability of River in Urban Areas

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