Porosity, Bulk Density, and Volume Reduction During Drying: Review of Measurement Methods and Coefficient Determinations

Qiu, Jun; Khalloufi, Seddik; Martynenko, Alex; Dalen, G. van; Almeida-Rivera, Cristhian

doi:10.1080/07373937.2015.1036289

Cited by 68 publications

(26 citation statements)

References 80 publications

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“…The graphical interpretation was used in our previous work [44] to determine porosity during drying. In the literature, several works, allowing to calculate the porosity from the shrinkage during drying, [45][46][47][48][49] have been presented.…”

Section: Introductionmentioning

confidence: 99%

Determination of porosity from shrinkage curves during sintering of granular materials

et al. 2017

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This paper investigates the implementation of an analytical model to determine the porosity of a granular material during reactive and nonreactive sintering. A graphical interpretation of this model is proposed to calculate the porosity by comparing the experimental shrinkage curve with the ideal one. For the nonreactive sintering, some examples have been taken from the literature to illustrate the application of this method for two granular materials (alumina and zircon). In the case of reactive sintering, we have used our experiments to study the sintering behavior of magnesium hydroxide. The shrinkage curve was determined by dilatometer and the porosity was measured by helium pycnometer. The comparison revealed that the porosity calculated from the model is fully consistent with the porosity measurements in the both cases.

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Section: Introductionmentioning

confidence: 99%

Determination of porosity from shrinkage curves during sintering of granular materials

et al. 2017

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“…(Moura et al, 2011) of oat β-glucan concentrations were necessary to form a strong gel.LGC showed a negative correlation with magnesium (r = −0.505; nonsignificant at p < 0.05) and copper (r = −0.762, p < 0.05) and a positive correlation with ash content (r = 0.560; nonsignificant at p < 0.05). Bulk density is the mass of a group of individual particles divided by the space occupied by the entire mass, including the air space(Qiu et al, 2015). Bulk density of β-glucans ranged from 0.180 to 0.565 g/ ml, with OL-10 cv.…”

mentioning

confidence: 99%

β-glucan from different Indian oat (Avena sativa) cultivars: Chemical, functional, structural, and rheological properties

Singh

Kaur

Sogi

2018

J Food Process Preserv

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β‐glucan was isolated from eight Indian oat cultivars (OL‐9, OL‐10, Kent, OS‐6, OS‐7, OS‐346, HFO‐114, and PLP‐1) and characterized for its composition, functional, rheological, morphological, and x‐ray diffraction properties. The isolated β‐glucans had ash and protein contents of 1.10%–2.60% and 3.1%–4.7%, respectively. Among various minerals studied, magnesium and cobalt were found in higher concentrations. Water‐binding and foaming capacities of β‐glucans ranged between 2.15–5.00 g/g and 20%–48%, respectively. The properties examined were found to be cultivar‐dependent. Among all cultivars, OL‐10 cv. β‐glucan was significantly (p < 0.05) different in exhibiting the highest moisture, ash, protein, lightness, bulk density, and foam stability. Scanning electron micrographs revealed the porous and spongy appearance of β‐glucans with an irregular particle shape. The rheological measurements of β‐glucan suspensions from all cultivars indicated their shear thinning and viscoelastic behavior. Practical applications Oat β‐glucan has numerous health benefits along with desirable functional properties to be used as an ingredient in food industry. A comparative study of various compositional, functional, structural, and rheological properties of β‐glucan isolated from different oat cultivars will help in selection of a cultivar suitable for imparting desirable characteristics to various food products.

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“…The main instruments include an electronic balance with accuracy of 0.01 g, water container, drying box, etc. The main steps are as follows: first, specimens are dehydrated by placing them into an oven under a temperature of 105~110 • C for 24 h, and the specimens are weighed after cooling to room temperature; then immersed in methanol for 12 h to saturation, and the saturation specimen weight and specimen buoyant weight when submerged in methanol are measured, finally the porosity of specimens is calculated [23][24][25]. The relationship between the porosity of RFC core specimens and depth is shown in Figure 6.…”

Section: Porosity Of Rock-filled Concretementioning

confidence: 99%

Experimental Research on the Properties of Rock-Filled Concrete

et al. 2019

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In order to comprehensively evaluate the properties of rock-filled concrete (RFC) with the strength of C15, lab experimental test and in-situ test are applied to explore the mechanical, hydraulic, ultrasonic characteristics of RFC in Hantang reservoir dam. Four types of defects within RFC are shown from the appearance of borehole cores specimens: (1) large sized voids existing in interfacial transition zone (ITZ) between self-compacting concrete (SCC) and rock block (RB); (2) bad cohesion in ITZ; (3) joints within rock block; (4) voids within SCC. For hydraulic aspects, the average porosity of RFC is 14.10%; the permeability rate of RFC ranges from 2.41 Lu to 10.41 Lu, with the average of 11.32 Lu, occasionally more than 25.52 Lu due to interconnected defects. For ultrasonic aspects, the ultrasonic velocity of RFC conforms to lognormal distribution, with the average of 2993.3 m/s and standard deviation of 650.5 m/s. For mechanical aspects, the average cubic compressive strength of RFC is 22.55 Mpa, with the standard deviation of 4.09 Mp. Thus the data shows a relatively great dispersion due to uneven distribution of some defects in RFC, which deteriorate the quality of RFC. Through the experimental investigation, it is shown that the quality of massive RFC in the Hantang dam is obviously non-homogeneous, mainly influenced by construction technology.

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Porosity, Bulk Density, and Volume Reduction During Drying: Review of Measurement Methods and Coefficient Determinations

Cited by 68 publications

References 80 publications

Determination of porosity from shrinkage curves during sintering of granular materials

Determination of porosity from shrinkage curves during sintering of granular materials

β-glucan from different Indian oat (Avena sativa) cultivars: Chemical, functional, structural, and rheological properties

Experimental Research on the Properties of Rock-Filled Concrete

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