Quantification of leaching kinetics in OPC mortars via a mesoscale model

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Quantification of leaching kinetics in OPC mortars via a mesoscale model. / Seetharam, Suresh; Patel, Ravi; Perko, Janez; Jacques, Diederik.

In: Construction and Building Materials, Vol. 180, 20.08.2018, p. 614–628.

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@article{a5dae042cfb94cddae00225beec19304,
title = "Quantification of leaching kinetics in OPC mortars via a mesoscale model",
abstract = "The problem of calcium leaching kinetics of ordinary Portland cement based mortars is revisited via a mesoscale approach. Based on state-of-the-art lattice-Boltzmann technique, a comprehensive suite of leaching analysis is undertaken to address a number of open questions such as (i) the competing effects of interface transition zone (ITZ) and aggregates, (ii) relative leaching rates of calcium between ITZ and mortar cement paste, and (iii) the influence of different water to cement ratios, volume fraction of aggregates and hence of ITZ on leaching kinetics. The mesoscale model is not only able to correctly reproduce experimentally observed trends but also confirm the commonly accepted hypothesis that ITZ and aggregates counter-balance their effect leading to similar portlandite leaching rates in cement paste and mortars. The model also confirms the applicability of simple scaling approach for upscaling leaching kinetics from pure cement paste to mortar scale under the condition that ITZ is fully percolated.",
keywords = "leaching kinetics, mortar, interface transition zone, Lattice-Boltzmann",
author = "Suresh Seetharam and Ravi Patel and Janez Perko and Diederik Jacques",
note = "Score=10",
year = "2018",
month = "8",
day = "20",
doi = "10.1016/j.conbuildmat.2018.05.245",
language = "English",
volume = "180",
pages = "614–628",
journal = "Construction and Building Materials",
issn = "0950-0618",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Quantification of leaching kinetics in OPC mortars via a mesoscale model

AU - Seetharam, Suresh

AU - Patel, Ravi

AU - Perko, Janez

AU - Jacques, Diederik

N1 - Score=10

PY - 2018/8/20

Y1 - 2018/8/20

N2 - The problem of calcium leaching kinetics of ordinary Portland cement based mortars is revisited via a mesoscale approach. Based on state-of-the-art lattice-Boltzmann technique, a comprehensive suite of leaching analysis is undertaken to address a number of open questions such as (i) the competing effects of interface transition zone (ITZ) and aggregates, (ii) relative leaching rates of calcium between ITZ and mortar cement paste, and (iii) the influence of different water to cement ratios, volume fraction of aggregates and hence of ITZ on leaching kinetics. The mesoscale model is not only able to correctly reproduce experimentally observed trends but also confirm the commonly accepted hypothesis that ITZ and aggregates counter-balance their effect leading to similar portlandite leaching rates in cement paste and mortars. The model also confirms the applicability of simple scaling approach for upscaling leaching kinetics from pure cement paste to mortar scale under the condition that ITZ is fully percolated.

AB - The problem of calcium leaching kinetics of ordinary Portland cement based mortars is revisited via a mesoscale approach. Based on state-of-the-art lattice-Boltzmann technique, a comprehensive suite of leaching analysis is undertaken to address a number of open questions such as (i) the competing effects of interface transition zone (ITZ) and aggregates, (ii) relative leaching rates of calcium between ITZ and mortar cement paste, and (iii) the influence of different water to cement ratios, volume fraction of aggregates and hence of ITZ on leaching kinetics. The mesoscale model is not only able to correctly reproduce experimentally observed trends but also confirm the commonly accepted hypothesis that ITZ and aggregates counter-balance their effect leading to similar portlandite leaching rates in cement paste and mortars. The model also confirms the applicability of simple scaling approach for upscaling leaching kinetics from pure cement paste to mortar scale under the condition that ITZ is fully percolated.

KW - leaching kinetics

KW - mortar

KW - interface transition zone

KW - Lattice-Boltzmann

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/30449939

U2 - 10.1016/j.conbuildmat.2018.05.245

DO - 10.1016/j.conbuildmat.2018.05.245

M3 - Article

VL - 180

SP - 614

EP - 628

JO - Construction and Building Materials

JF - Construction and Building Materials

SN - 0950-0618

ER -

ID: 4428561