Development and functional characteristics of novel foam concrete

Shang, Xiaoyu; Qu, Na; Li, Jiangshan

doi:10.1016/j.conbuildmat.2022.126666

Cited by 34 publications

(12 citation statements)

References 38 publications

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“…The analysis was conducted using 3D Manager as part of 3D Suite (Ollion et al, 2013). It is useful to quantify and understand the pore discontinuity as it can affect properties, such as thermal conductivity (Arriagada et al, 2019), tensile parameters (Gao et al, 2021; Jones et al, 2009) and acoustic transmission of the material (Shang et al, 2022). It also provides insight around the mechanism of material formation in bulk; for instance, during PMMA membrane casting air bubbles can get trapped which results in cavities.…”

Section: Resultsmentioning

confidence: 99%

Development and application of a 3D image analysis strategy for focused ion beam – Scanning electron microscopy tomography of porous soft materials

Prochukhan,

Rafferty,

Canavan

et al. 2024

Microscopy Res & Technique

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In recent years, the potential of porous soft materials in various device technologies has increased in importance due to applications in fields, such as wearable electronics, medicine, and transient devices. However, understanding the 3‐dimensional architecture of porous soft materials at the microscale remains a challenge. Herein, we present a method to structurally analyze soft materials using Focused Ion Beam – Scanning Electron Microscopy (FIB‐SEM) tomography. Two materials, polymethyl methacrylate (PMMA) membrane and pine wood veneer were chosen as test‐cases. FIB‐SEM was successfully used to reconstruct the true topography of these materials in 3D. Structural and physical properties were subsequently deduced from the rendered 3D models. The methodology used segmentation, coupled with optimized thresholding, image processing, and reconstruction protocols. The 3D models generated pore size distribution, pore inter‐connectivity, tortuosity, thickness, and curvature data. It was shown that FIB‐SEM tomography provides both an informative and visual depiction of structure. To evaluate and validate the FIB‐SEM reconstructions, porous properties were generated from the physical property analysis techniques, gas adsorption analysis using Brunauer‐Emmett‐Teller (BET) surface area analysis and mercury intrusion porosimetry (MIP) analysis. In general, the data obtained from the FIB‐SEM reconstructions was well‐matched with the physical data.Research Highlights Porous specimens of both synthetic and biological nature, a poly(methyl methacrylate) membrane and a pine veneer respectively, are reconstructed via FIB‐SEM tomography without resin‐embedding. Different thresholding and reconstruction methods are explored whereby shadowing artifacts are present with the aid of free open‐source software. Reconstruction data is compared to physical data: MIP, gas adsorption isotherms which are analyzed via BET and Barrett‐Joyner‐Halenda (BJH) analysis to yield a full picture of the materials.

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Section: Resultsmentioning

confidence: 99%

Development and application of a 3D image analysis strategy for focused ion beam – Scanning electron microscopy tomography of porous soft materials

Prochukhan,

Rafferty,

Canavan

et al. 2024

Microscopy Res & Technique

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“…On the other hand, as the fiber content increases, a portion of the cement will be replaced by the increased fiber, and the hydration product C-S-H gel will be inferior. Meanwhile, the strength of fiber reinforced concrete has been demonstrated to depend on the strength of cement matrix and the interfacial transitional zone (ITZ) between cement paste and fiber [47][48][49]. PP fiber is a hydrocarbon polymer material, it results in the formation of a water film at the interface of the fiber and matrix, higher water to cement ratio (w/c) and larger space in the ITZ between fiber and fresh cement paste, which served to produce the larger CH crystal plate.…”

Section: Compressive Strengthmentioning

confidence: 99%

Mix proportion optimization and early strength development in modified foam concrete: an experimental study

Shi

Yin

Wei

et al. 2023

Mater. Res. Express

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The influence of the single polycarboxylate superplasticizer (PCE) and blending it mixed hydroxypropyl methylcellulose (HPMC) on hardening moulding quality and surface pulverisation of foam concrete was investigated. An orthogonal experimental design was employed to determine the optimum combination of parameters for four property indexes (PIs) in this paper. A multi-index matrix analysis method was used to evaluate the parameter combinations and obtain the overall optimal performance for the PIs. The effect of calcium formate (CaF) on the early compressive strength of modified foam concrete with the most optimal combination in different density grades was also studied. The results indicate that the incomplete cement hydration reaction is the essential cause of pulverisation, which can be alleviated by adding a suitable PCE. Defoaming and precipitation occur when the PCE incorporated exceeds 0.1%, which can be mitigated by the addition of 0.02 to 0.06% HPMC. The orthogonal analysis indicates that the anti-cracking agent has a more substantial effect on the strength of the foam concrete than the thickening agent. The most significant factor of mechanical properties is PP fiber followed by dispersible latex powder (DLP). The optimal combination of foam concrete is 0.06% HPMC, 0.3% DLP, and 0.5% PP fiber. The early compressive strength of foam concrete can be significantly enhanced by increasing the CaF content. However, increasing the density level results in a decrease in the 28-day compressive strength of the foam concrete.

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“…Relying on practical projects, Yang Weihui [ 9 ] studied the application of foamed concrete in cavity filling, which provided a lot of theoretical basis for this study. On the basis of traditional foamed concrete, Shang Xiaoyu et al [ 10 ] developed a new type of foamed concrete by adding new admixtures, reflecting on the importance of sustainable and multi-functional development of lightweight concrete for buildings under the background of global climate change. Lu Jianglong et al [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ] redesigned and adjusted the mix proportion of foamed concrete to improve its engineering properties, including fluidity.…”

Section: Introductionmentioning

confidence: 99%

Study on Self-Leveling of Foamed Concrete for Long-Distance-Tunnel-Gas-Pipeline Backfill

Shen³

et al. 2022

Polymers

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In the foamed-concrete-backfilled-gas-pipeline project, the fluidity of foamed concrete has a great impact on the construction quality. This research studied the fluidity of foamed concrete through laboratory tests. By changing the water–cement ratio, admixtures, additives, foaming-agent content and other test parameters, foamed concrete with different fluidities was prepared, and the effects of the above parameters on the fluidity of foamed concrete were analyzed. At the same time, the construction equipment was improved in the three steps of transportation, production and pouring. The results show the factors affecting the fluidity of foamed concrete are, in order of importance, foaming-agent content > water–cement ratio > water-reducer content > admixture content. According to the orthogonal-test results, the control scheme meeting the fluidity requirements of the actual engineering project had gains as follows: the water–cement-ratio range from 0.5 to 0.6, the amount of admixture from 35% to 40%, the water-reducer content at 1% and the foaming-agent content from 3% to 3.5% so as to ensure the automatic leveling of foamed concrete under the best flow state.

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Development and functional characteristics of novel foam concrete

Cited by 34 publications

References 38 publications

Development and application of a 3D image analysis strategy for focused ion beam – Scanning electron microscopy tomography of porous soft materials

Development and application of a 3D image analysis strategy for focused ion beam – Scanning electron microscopy tomography of porous soft materials

Mix proportion optimization and early strength development in modified foam concrete: an experimental study

Study on Self-Leveling of Foamed Concrete for Long-Distance-Tunnel-Gas-Pipeline Backfill

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