TY - JOUR
T1 - Pore structure features of pervious concretes proportioned for desired porosities and their performance prediction
AU - Sumanasooriya, Milani S.
AU - Neithalath, Narayanan
N1 - Funding Information:
The authors sincerely acknowledge the support from National Science Foundation (NSF) for the conduct of this study through a CAREER award (CMMI 1129369) to the second author. Numerous discussions with Dale Bentz of the National Institute of Standards and Technology (NIST) are also acknowledged. The contents of this paper reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein, and do not necessarily reflect the views and policies of the supporting agencies, nor do the contents constitute a standard, specification, or a regulation.
PY - 2011/9
Y1 - 2011/9
N2 - The pore structure features such as the pore volume fractions, pore sizes, specific surface areas, and connectivity dictate the properties of any porous material. In this paper, an analysis of the pore structure features of pervious concretes designed for similar porosities using two different proportioning methods - one with higher paste contents and lower compactive efforts and another with lower paste contents and higher compactive efforts - is carried out. The porosities (both from volumetric and image analysis based methods) and characteristic pore sizes obtained from morphological functions are found to be statistically similar for the high-paste and low-paste content mixtures, while the low-paste content mixtures show a higher specific surface area of pores. The extracted pore structure features, when used in the Katz-Thompson equation for permeability prediction, result in over-estimation of permeability for specimens with larger pore sizes. A correction factor for the Katz-Thompson constant is found to be linearly related to the granulometry-based pore sizes.
AB - The pore structure features such as the pore volume fractions, pore sizes, specific surface areas, and connectivity dictate the properties of any porous material. In this paper, an analysis of the pore structure features of pervious concretes designed for similar porosities using two different proportioning methods - one with higher paste contents and lower compactive efforts and another with lower paste contents and higher compactive efforts - is carried out. The porosities (both from volumetric and image analysis based methods) and characteristic pore sizes obtained from morphological functions are found to be statistically similar for the high-paste and low-paste content mixtures, while the low-paste content mixtures show a higher specific surface area of pores. The extracted pore structure features, when used in the Katz-Thompson equation for permeability prediction, result in over-estimation of permeability for specimens with larger pore sizes. A correction factor for the Katz-Thompson constant is found to be linearly related to the granulometry-based pore sizes.
KW - Granulometry
KW - Katz-Thompson equation
KW - Permeability
KW - Pervious concrete
KW - Pore connectivity
KW - Pore size
KW - Porosity
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U2 - 10.1016/j.cemconcomp.2011.06.002
DO - 10.1016/j.cemconcomp.2011.06.002
M3 - Article
AN - SCOPUS:79961024646
SN - 0958-9465
VL - 33
SP - 778
EP - 787
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
IS - 8
ER -