Comparison Between Dcrit Considering the Abrupt Variation and Inflexion in the Concrete Mercury Intrusion Porosimetry Curve

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Título: Comparison Between Dcrit Considering the Abrupt Variation and Inflexion in the Concrete Mercury Intrusion Porosimetry Curve
Autor/es: Guimarães, A.T.C. | Vera Almenar, Guillem de | Rodrigues, F.T. | Antón Gil, Carlos | Climent, Miguel-Ángel
Grupo/s de investigación o GITE: Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Ingeniería Civil
Palabras clave: Concrete | Mercury Porosimetry | Critical Pore Diameter | Chloride
Área/s de conocimiento: Ingeniería de la Construcción
Fecha de publicación: 2015
Editor: Wiley
Cita bibliográfica: Experimental Techniques. 2015, 39(6): 43-52. doi:10.1111/ext.12002
Resumen: Mercury intrusion porosimetry (MIP) has been widely used to evaluate the quality of concrete through the pore size distribution parameters. Two of these parameters are the critical pore diameter (Dcrit) and the percentage of the most interconnected net of pores compared to the total volume of pores. Some researchers consider Dcrit as the diameter obtained from the inflexion point of the cumulative mercury intrusion curve while others consider Dcrit as the diameter obtained from the point of abrupt variation in the same curve. This study aims to analyze two groups of concretes of varying w/c ratios, one cast with pozzolanic cement and another with high initial strength cement, in order to determine which of these diameters feature a better correlation with the quality parameters of the concretes. The concrete quality parameters used for the evaluations were (1) the w/c ratios and (2) chloride diffusion coefficients measured at approximately 90 days. MIP cumulative distributions of the same concretes were also measured at about 90 days, and Dcrit values were determined (1) from the point of abrupt variation and alternatively, (2) from the inflexion point of each of these plots. It was found that Dcrit values measured from the point of abrupt variation were useful indicators of the quality of the concrete, but the Dcrit values based on the inflexion points were not. Hence, it is recommended that Dcrit and the percentage of the most interconnected volume of pores should be obtained considering the point of abrupt variation of the cumulative curve of pore size distribution.
Patrocinador/es: We thank the funding received for this research from the Ministerio de Ciencia e Innovación of Spain and Fondo Europeo de Desarrollo Regional (FEDER) through Project BIA2010-20548.
URI: http://hdl.handle.net/10045/53016
ISSN: 0732-8818 (Print) | 1747-1567 (Online)
DOI: 10.1111/ext.12002
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2012, Society for Experimental Mechanics
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1111/ext.12002
Aparece en las colecciones:INV - DMCIA - Artículos de Revistas

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