Reassessment of mercury intrusion porosimetry for characterizing the pore structure of cement-based porous materials by monitoring the mercury entrapments with X-ray computed tomography

Zeng, Qiang; Chen, Shan; Yang, Pengcheng; Yu, Ping; Wang, Jing; Zhang, Chunsheng; Wang, Zhendi; Yan, Dongming

doi:10.1016/j.cemconcomp.2020.103726

Cited by 71 publications

(15 citation statements)

References 93 publications

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“…The increase in the energy in the system equals the work done for the mercury to intrude the sample. On the fractally rough pore surface of the cementitious material, the correlation between the area for fractal surface (S) and the circumscribed volume (V) is given by Mandelbrot [5] as in Equa tion (4). Considering the energy conservation during the MIP experiment, Zhang and L [18] proposed a logarithm proportionality between the accumulated intrusion work W and the represented accumulated intrusion surface (Qn) in Equation (5).…”

Section: Thermodynamic Approach For Obtaining the Surface Fractal Dimension From Mipmentioning

confidence: 99%

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Pore Size Distribution and Surface Multifractal Dimension by Multicycle Mercury Intrusion Porosimetry of GGBFS and Limestone Powder Blended Concrete

et al. 2021

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Eco-friendly concrete mixtures make efficient use of constituents with reduced environmental impact to secure durable structures. Ternary mixes containing Portland cement, ground granulated blast-furnace slag (GGBFS) and limestone powder (LP) have demonstrated a good balance between environmental impact, economic cost and technical performance. The pore structure of cement-based materials determines the transport of species; hence its description is a valuable tool for predicting their durability performance. In this paper, textural analysis of the pore structure of Portland cement concrete and GGBFS and limestone powder blended concrete is assessed by multicycle mercury intrusion porosimetry (MIP). Results from three intrusion-extrusion cycles were used for determining pore volume, size distribution and surface multifractal dimension. The hysteresis during the experiments is mainly explained by the combined effects of ink-bottle pores and different contact angles for the intrusion and retraction. The analysis of the surface multifractal dimension of the pore structure showed no significant effects of GGBFS and limestone powder on the pore wall texture of concrete samples. The outcome depicts the advantages of using multiple intrusion-extrusion cycles during MIP experiments, as well as the effect of 35 wt.% GGBFS, 25 wt.% GGBFS + 10 wt.% LP, and 25 wt.% of LP, on concrete pore structure.

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Section: Thermodynamic Approach For Obtaining the Surface Fractal Dimension From Mipmentioning

confidence: 99%

“…Pore wall roughness, pore connectivity and coordination with neighbouring throats are some of the parameters that are usually required for modelling. A wide-spread technique to describe the pore structure of cementitious systems is mercury intrusion porosimetry (MIP) [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Pore Size Distribution and Surface Multifractal Dimension by Multicycle Mercury Intrusion Porosimetry of GGBFS and Limestone Powder Blended Concrete

et al. 2021

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“…The pores in the hardened slurry can be divided into micropores (<2 nm), mesopores (2-50 nm), and macropores (>50 nm) [31]. Mesopores can be subdivided into two pore size ranges: 2-10 nm pores, which do not affect the strength and permeability but affect shrinkage, and 10-50 nm pores that affect the strength, permeability, and shrinkage [32,33]. The total pore volume of cementitious-material-hardened slurry first decreased and then increased when the ASR-to-DG ratio increased.…”

Section: Pore Structurementioning

confidence: 99%

Effect of Ammonia-Soda Residue on the Strength and Chloride-Resistance Performance of Steel Slag-Granulated Blast Furnace Slag-Based Concrete after Immersion in Artificial Seawater

Wen

2021

Materials

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Ammonia-soda residue (ASR) is the main solid waste generated from soda manufacturing and is hard to reuse due to its complex chemical composition. This study investigated the influence of ASR content on the strength and chloride-resistance capacity of concrete based on basic oxygen furnace slag and ground blast furnace slag. The hydration and chloride resistance mechanisms were analysed by comparing the hydrate products and pore structural changes. The results showed that adding ASR had the greatest impact on early strength. ASR-introduced chloride ions may participate in the hydration process to generate Friedel’s salt and decrease ettringite. The optimum pore distribution appeared when the ASR-to-desulphurisation gypsum ratio was 2:3 because of the introduction of nucleation sites and the decrease of C–S–H gels. The two chloride resistance-capacity measurements were affected differently by the ASR content. The apparent chloride diffusion coefficient was mainly affected by the percentage of pores that were larger than 10 nm. However, electric flux increased when ASR increased due to the influence of introduced chloride. The crystallisation pressure of Friedel’s salt decreases the strength of concrete with ASR content after high-concentration artificial-seawater immersion. The significant chloride-resistance property provided an alternative use for the concrete containing ASR.

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“…According to [2] these methods could be either using the artificial generation or through 3D imaging by the use of X-ray CT. In [6] it is shown that the analysis of the porosity of the stones and concrete using the X-ray micro CT could provide superior information than the information earned using traditional methods such as mercury intrusion porosimetry (MIP), nitrogen sorption, and electron microscopy [5,[7][8][9][10]. These methods could not produce complete information about the pores' structure as they either provide indirect measurements of the pores' structure in the case of the MIP and nitrogen sorption methods or produce only 2D information in the case of using the electron microscopy method [5].…”

Section: Introductionmentioning

confidence: 99%

Scatter Correction and Contrast Improvement of Concrete Objects Using Monte Carlo Method

Alsaffar¹,

Guhathakurta²,

Simon³

2022

eJNDT

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Estimating the load-carrying capacity of concrete structures is a major challenge as the infrastructure industry thrives to reduce the consumption of concrete for environmental concerns as well as improving the cost and time efficiency of infrastructural projects. Quantifying such load-carrying capacity needs a detailed study of the micro-structures of the concrete mixture composed of stones, reinforcement, and cement matrix. Computed Tomography (CT) provides a reliable nondestructive technique to analyze and segment the different materials within the concrete structures. However, CT is normally accompanied by different kinds of artifacts that highly degrades the quality of the reconstructed image. Among these artifacts, scatter imposes severe degradation of the quality of the image including reduced contrast between different materials, cupping and streaks artifacts. Several methods were used to remove the scatter effect. The most effective way to correct for the scatter effect is by the use of the Monte Carlo (MC) method due to the accurate modeling of the physics accompanying the photon matter interaction. In this work, a fast MC photon transport model accelerated over the use of the GPU(s) platforms is developed. It is extensively verified against several well-known simulators and experimentally has been used to correct the scatter effect and to improve the contrast between the concrete component.

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Reassessment of mercury intrusion porosimetry for characterizing the pore structure of cement-based porous materials by monitoring the mercury entrapments with X-ray computed tomography

Cited by 71 publications

References 93 publications

Pore Size Distribution and Surface Multifractal Dimension by Multicycle Mercury Intrusion Porosimetry of GGBFS and Limestone Powder Blended Concrete

Pore Size Distribution and Surface Multifractal Dimension by Multicycle Mercury Intrusion Porosimetry of GGBFS and Limestone Powder Blended Concrete

Effect of Ammonia-Soda Residue on the Strength and Chloride-Resistance Performance of Steel Slag-Granulated Blast Furnace Slag-Based Concrete after Immersion in Artificial Seawater

Scatter Correction and Contrast Improvement of Concrete Objects Using Monte Carlo Method

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