Characterisation of porous titania yttrium oxide compounds by mercury intrusion porosimetry and X-ray refractometry

To determine the mechanism and strength characteristics of solidification of silt by a permeable polyurethane grouting material, the effects of polymer content, soil moisture, and immersion time on the unconfined compressive strength (UCS) of the silt have been studied. The results showed that the permeable polymer grouting material can significantly improve the performance of silt: (1) A higher amount of polymer produced a greater strength in the solidified soil. (2) The strength of the solidified soil increased as the immersion time was increased. (3) Moisture in the soil was not conducive to improving the strength of the solidified soil. The X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) have proven that polyurethane does not react with the silt, but they could improve the strength of the silt through physical action. Mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) were performed to find that polymers can reduce soil porosity, and the addition of polyurethane improved the strength of the silt mainly through adhesion, wrapping, filling, and bridging.

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Microstructural characterization of biobased carbon foam by means of X-ray microtomography and compared to conventional techniques

RSC Advances ◽

10.1039/c6ra16969d ◽

2016 ◽

Vol 6 (98) ◽

pp. 96057-96064 ◽

Cited By ~ 3

Author(s):

Juliette Merle ◽

Pascale Sénéchal ◽

Fabrice Guerton ◽

Peter Moonen ◽

Pierre Trinsoutrot ◽

...

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Mercury Intrusion Porosimetry ◽

Microstructural Characterization ◽

Carbon Foam ◽

X Ray ◽

Mercury Intrusion ◽

Scanning Electron

The objective of this work is to compare three techniques for characterizing the morphology of porous bio-based carbon foam, namely mercury intrusion porosimetry, scanning electron microscopy and X-ray microtomography.

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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

Cement and Concrete Composites ◽

10.1016/j.cemconcomp.2020.103726 ◽

2020 ◽

Vol 113 ◽

pp. 103726

Author(s):

Qiang Zeng ◽

Shan Chen ◽

Pengcheng Yang ◽

Yu Peng ◽

Jiyang Wang ◽

...

Keyword(s):

Computed Tomography ◽

Pore Structure ◽

Porous Materials ◽

Mercury Intrusion Porosimetry ◽

X Ray ◽

Mercury Intrusion ◽

X Ray Computed

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Carbide slag–activated ground granulated blastfurnace slag for soft clay stabilization

Canadian Geotechnical Journal ◽

10.1139/cgj-2014-0007 ◽

2015 ◽

Vol 52 (5) ◽

pp. 656-663 ◽

Cited By ~ 20

Author(s):

Yaolin Yi ◽

Liyang Gu ◽

Songyu Liu ◽

Anand J. Puppala

Keyword(s):

Mercury Intrusion Porosimetry ◽

Soft Clay ◽

X Ray Diffraction ◽

X Ray ◽

Mercury Intrusion ◽

Carbide Slag ◽

Calcium Silicate Hydrates ◽

Blastfurnace Slag ◽

Ucs Test ◽

Curing Age

This study addresses the use of an industry by-product, carbide slag (CS), to activate another industry by-product, ground granulated blastfurnace slag (GGBS), for soft clay stabilization in comparison to Portland cement (PC). The properties of CS–GGBS stabilized clays were investigated through unconfined compressive strength (UCS) test, mercury intrusion porosimetry (MIP), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results indicated that the optimum CS content for the CS–GGBS stabilized clay to yield the highest UCS was 4%–6%, varying slightly with curing age and GGBS content. The UCS of the optimum CS-GGBS stabilized clays was more than twice that of the corresponding PC stabilized clays. The main hydration products detected for the CS–GGBS stabilized clays included calcium silicate hydrates (CSH), calcium aluminate hydrates (CAH), and alumino-ferrite monosulfate (AFm).

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Cement render and mortar and their damages due to salt crystallization in the Holy Trinity Dominicans monastery in Cracow, Poland

10.5194/egusphere-egu2020-18280 ◽

2020 ◽

Author(s):

Mariola Marszałek ◽

Krzysztof Dudek ◽

Adam Gaweł ◽

Jerzy Czerny

Keyword(s):

Laboratory Tests ◽

Mercury Intrusion Porosimetry ◽

Cement Mortar ◽

Salt Crystallization ◽

Secondary Minerals ◽

X Ray ◽

Mercury Intrusion ◽

Holy Trinity ◽

Micro Raman Spectroscopy ◽

Jurassic Limestone

The presented investigations are focused on a part of the 13th century Church of the Holy Trinity Dominicans monastery in Cracow, Poland, and include the wall fa&#231;ade of the 17th century Myszkowski chapel. The chapel was probably designed by Santi Gucci Fiorentino and built by his workshop. Southern fa&#231;ade of the chapel is made of Tertiary limestone blocks that make characteristic rusticated wall. Lower part of the fa&#231;ade is covered with cement and the basement is made of irregular fragments of Jurassic limestone and Cretaceous sandstone partly replaced and bound with cement mortar. The fa&#231;ade revealed clear signs of damage ranging from dark gray soiling of the surface, scaling to efflorescences. The last ones &#8211; mainly on the border of limestone blocks and the cement in the part of the basement.Laboratory tests included mineralogical, chemical and petrophysical analyses. Optical microscopy, scanning electron microscopy (SEM-EDS), micro-Raman spectroscopy and X-ray diffractometry (XRD) were used for analysing materials and deterioration products of the cement render and mortar. The petrophysical properties of the materials have been performed using mercury intrusion porosimetry. The secondary minerals detected include mainly gypsum CaSO4&#183;2H2O, thenardite Na2SO4, &#160;aphthitalite (Na,K)3Na(SO4)2, darapskite, Na3(SO4)(NO3)&#183;H2O, nitre KNO3, nitratine NaNO3, ettringite Ca6Al2(SO4)3(OH)12&#183;26H2O and monosulphite Ca4Al2O6SO3&#183;11H2O. Lower blocks of the fa&#231;ade covered with cement contain chiefly gypsum, ettringite and monosulphite, cement from the basement &#8211; gypsum and nitre; while efflorescences &#8211; thenardite, aphthitalite, darapskite, nitre and nitratine. The origin of the salts have been discussed and the differences in their type have been associated with composition of the materials and their physicochemical properties.This work has been financially supported by the AGH University of Science and Technology, statutory grant no. 16.16.140.315.

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Study on the Pore Structure Characteristics of Ferronickel-Slag-Mixed Ternary-Blended Cement

Materials ◽

10.3390/ma13214863 ◽

2020 ◽

Vol 13 (21) ◽

pp. 4863

Author(s):

Won Jung Cho ◽

Min Jae Kim ◽

Ji Seok Kim

Keyword(s):

Compressive Strength ◽

Portland Cement ◽

Pore Structure ◽

Mercury Intrusion Porosimetry ◽

Chloride Transport ◽

Blended Cement ◽

Cement Matrix ◽

X Ray ◽

Mercury Intrusion ◽

Ferronickel Slag

Pore structure development in Portland cement, fly ash, or/and ferronickel slag (FNS) was investigated using mercury intrusion porosimetry and X-ray CT tomography. The progress of hydration was observed using X-ray diffraction (XRD) analysis and compressive strength while durability of concrete was monitored by chloride penetration resistance and chloride profiles. Mercury intrusion porosimetry (MIP) results suggested that the blended cement had a higher porosity while lower critical pore size. The major reason to this increased porosity was the formation of meso and micro pores compared to ordinary Portland cement (OPC). In terms of chloride transport, replaced cement, especially ternary-blended cement had higher resistance to chloride transport and exhibited slightly lower development of compressive strength. X-ray CT tomography shows that the influence of pore structure of ternary-blended cement on the ionic transport was strongly related to the pore connectivity of cement matrix.

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Effect of Metakaolin Sand on Properties of Cement Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.897.176 ◽

2014 ◽

Vol 897 ◽

pp. 176-179

Author(s):

Ľudovít Krajči ◽

Ivan Janotka ◽

Marta Kuliffayova ◽

Peter Uhlik

Keyword(s):

Portland Cement ◽

Mercury Intrusion Porosimetry ◽

Structure Refinement ◽

Hydrate Formation ◽

Raw Material ◽

Cement Composites ◽

X Ray Diffraction ◽

X Ray ◽

Mercury Intrusion ◽

Positive Effect

The Slovak natural raw material kaolin sand containing 36 wt.% of kaolinite from Vyšný Petrovec deposit was thermally transformed at 650 °C for 1 hour to the metakaolin sand with relevant content of metakaolinite. Behaviour of cement composites having replacement of Portland cement with metakaolin sand including 0; 5; 10 and 15 wt.% of metakaolinite and water to solids ratio of 0.5 cured in water for 28 days and 90 days was studied by thermal analysis, X-ray diffraction analysis and mercury intrusion porosimetry analysis. The study concerned calciumsilica hydrate and calcium aluminate hydrate formation, portlandite dehydroxylation and calcite decarbonation. The influence of curing time and metakaolinite content were estimated. The replacement of Portland cement by metakaolin sand led to positive effect on relevant compressive strengths. The changes in microstructure involved especially reduction in portlandite content and pore structure refinement.

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