Pore morphology variation under ambient curing of plain and fiber-reinforced high performance mortar at an early age

Mínguez, Jesús; Cabrera, Miguel; González, Dorys C.

doi:10.1016/j.conbuildmat.2018.12.010

Cited by 16 publications

(13 citation statements)

References 43 publications

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“…Finally, it should be noted that microstructural studies not only help to understand the behavior of hardened concrete, but also of fresh concrete. In this case, there are several works that use CT to study the evolution of porosity with the curing time of concrete [71,75] (Figure 8).…”

Section: Applications To the Study Of The Internal Matrixmentioning

confidence: 99%

“…Finally, a research line also existing lately, although less explored, is the application of CT to study the effects of fibers during concrete curing [75].…”

Section: Applications To the Study Of Fiber Reinforced Concretementioning

confidence: 99%

“…Porosity development in a steel fiber reinforced mortar specimen over curing time. From left to right: days 1, 2, 3, 4 and 7 after casting[75].…”

mentioning

confidence: 99%

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La tomografía computerizada más allá de la medicina: Aplicaciones al estudio microestructural del hormigón y otros materiales de la ingeniería (versión inglesa)

Alonso¹,

Algarra²,

Cabrera³

et al. 2020

hya

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La tomografía computerizada (TC) es una tecnología muy potente para el estudio de la microestructura de los materiales, lo que se refleja en la gran cantidad de trabajos publicados durante los últimos años. Más allá de su conocido uso en medicina, la TC se ha extendido a otros muchos campos científicos. En este trabajo se recogen algunos de ellos, con especial interés en el estudio del hormigón. Entre sus aplicaciones más relevantes destaca su uso en paleontología y patrimonio para analizar el interior de fósiles y restos arqueológicos sin dañarlos. Por otro lado, también se emplea con frecuencia en el estudio de materiales de la ingeniería, como los metales, los materiales compuestos, las mezclas bituminosas de los firmes, las rocas y el hormigón. En todos los casos, los datos obtenidos por los escáneres de TC se usan para mejorar el conocimiento de la respuesta macroscópica de dichos materiales frente a todo tipo de acciones, mecánicas o ambientales. En el caso particular el hormigón, entre sus aplicaciones principales se encuentran la del análisis de la matriz interna, el estudio de los patrones de fisuración y finalmente el estudio del hormigón reforzado con fibras.

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Section: Applications To the Study Of The Internal Matrixmentioning

confidence: 99%

“…Finally, a research line also existing lately, although less explored, is the application of CT to study the effects of fibers during concrete curing [75].…”

Section: Applications To the Study Of Fiber Reinforced Concretementioning

confidence: 99%

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La tomografía computerizada más allá de la medicina: Aplicaciones al estudio microestructural del hormigón y otros materiales de la ingeniería (versión inglesa)

Alonso¹,

Algarra²,

Cabrera³

et al. 2020

hya

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“…In most cases, this is an unintended "component"; nevertheless, there are other situations where concretes are designed with a certain level of porosity. This occurs, for example, in pervious concretes used mainly in concrete pavements [18][19][20] or in porous concretes to improve their response to freeze-thaw cycles [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Use of Computed Tomography Scan Technology to Explore the Porosity of Concrete: Scientific Possibilities and Technological Limitations

2021

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This paper shows the scientific possibilities of computed tomography for the study of concrete porosity. The enormous technological advances in computed tomography equipment used in materials research, with increasingly higher energy, better resolution and smaller pixel size will allow, in the near future, viewing pore sizes that are currently unthinkable, competing in resolution with the traditional techniques of mercury porosimetry and nitrogen adsorption. The challenge at that time (and to a lesser extent today) will be how to extract as much information as possible from the large amount of data provided by computed tomography equipment. In this article, through the study of six cubic specimens of 40 mm sides, different techniques of extraction and presentation of the information are shown, which help us to better understand the characterization of the morphology and distribution of the pores inside the concrete matrix. This information is essential to understand some of the macroscopic responses of the concrete.

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“…In recent years, many authors have conducted research on concrete microstructures with this technique, and many have, in particular, focused on the fiber orientation and fiber distribution inside concrete matrices [15,21,22]. Some other research works have focused on the spatial distributions of concrete voids and their effects on macroscopic properties [23][24][25][26][27][28]. A complete, state-of-the-art work on the use of computed tomography to explore the microstructure of materials in civil and mechanical engineering is presented in Vicente et al [29,30].…”

Section: Introductionmentioning

confidence: 99%

Plain and Fiber-Reinforced Concrete Subjected to Cyclic Compressive Loading: Study of the Mechanical Response and Correlations with Microstructure Using CT Scanning

Mínguez

Gutierrez²,

González

et al. 2019

Applied Sciences

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The response ranges of three principal mechanical parameters were measured following cyclic compressive loading of three types of concrete specimen to a pre-defined number of cycles. Thus, compressive strength, compressive modulus of elasticity, and maximum compressive strain were studied in (i) plain, (ii) steel-fiber-reinforced, and (iii) polypropylene-fiber-reinforced high-performance concrete specimens. A specific procedure is presented for evaluating the residual values of the three mechanical parameters. The results revealed no significant variation in the mechanical properties of the concrete mixtures within the test range, and slight improvements in the mechanical responses were, in some cases, detected. In contrast, the scatter of the mechanical parameters significantly increased with the number of cycles. In addition, all the specimens were scanned by means of high resolution computed tomography, in order to visualize the microstructure and the internal damage (i.e., internal micro cracks). Consistent with the test results, the images revealed no observable internal damage caused by the cyclic loading.

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Pore morphology variation under ambient curing of plain and fiber-reinforced high performance mortar at an early age

Cited by 16 publications

References 43 publications

La tomografía computerizada más allá de la medicina: Aplicaciones al estudio microestructural del hormigón y otros materiales de la ingeniería (versión inglesa)

La tomografía computerizada más allá de la medicina: Aplicaciones al estudio microestructural del hormigón y otros materiales de la ingeniería (versión inglesa)

Use of Computed Tomography Scan Technology to Explore the Porosity of Concrete: Scientific Possibilities and Technological Limitations

Plain and Fiber-Reinforced Concrete Subjected to Cyclic Compressive Loading: Study of the Mechanical Response and Correlations with Microstructure Using CT Scanning

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