Air permeability, water penetration and water absorption to specify durability of eco-efficient concrete

Joachim Juhart, Rok Bregar, Gheorghe Alexandru David, Markus Krüger

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

The durability of eco-efficient, clinker reduced concrete is a key factor of its performance. In the presented study, different durability indicators of a newly developed eco-concrete composition (ECO) are tested versus standard normal concrete as reference (REF). The tested durability indicators are open porosity, water penetration depth, rate of water absorption by capillarity and two different methods of measuring air permeability (PermeaTORR AC device versus Testing bubble counter). The ECO mix and in particular its cementitious matrix is designed by a combined filler concept substituting Portland cement partially by properly selected limestone fillers of different grain sizes. The approach is based on a combination of particle packing optimization techniques and the reduction of water demand for certain flowability of the paste. Cement content is below the limits of traditional standards while w/c-ratio exceed such limits. While the performance of the eco-concrete in terms of workability and strength is at least equivalent to the standard mix, ecological impact indicators as global warming potential and embodied energy are substantially improved. Durability indicators overall show nearly equivalent performance of ECO and REF. In detail, the resulting air permeability coefficient tested with a bubble counter differs significantly from the coefficient tested by PermeaTORR.
Originalspracheenglisch
Seiten (von - bis)67-73
FachzeitschriftRILEM Technical Letters
Jahrgang4
DOIs
PublikationsstatusVeröffentlicht - 18 Okt 2019

Fields of Expertise

  • Advanced Materials Science

Dies zitieren

Air permeability, water penetration and water absorption to specify durability of eco-efficient concrete. / Juhart, Joachim; Bregar, Rok; David, Gheorghe Alexandru; Krüger, Markus.

in: RILEM Technical Letters, Jahrgang 4, 18.10.2019, S. 67-73.

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

@article{7adf5c69f60944c2936e6702082026f8,
title = "Air permeability, water penetration and water absorption to specify durability of eco-efficient concrete",
abstract = "The durability of eco-efficient, clinker reduced concrete is a key factor of its performance. In the presented study, different durability indicators of a newly developed eco-concrete composition (ECO) are tested versus standard normal concrete as reference (REF). The tested durability indicators are open porosity, water penetration depth, rate of water absorption by capillarity and two different methods of measuring air permeability (PermeaTORR AC device versus Testing bubble counter). The ECO mix and in particular its cementitious matrix is designed by a combined filler concept substituting Portland cement partially by properly selected limestone fillers of different grain sizes. The approach is based on a combination of particle packing optimization techniques and the reduction of water demand for certain flowability of the paste. Cement content is below the limits of traditional standards while w/c-ratio exceed such limits. While the performance of the eco-concrete in terms of workability and strength is at least equivalent to the standard mix, ecological impact indicators as global warming potential and embodied energy are substantially improved. Durability indicators overall show nearly equivalent performance of ECO and REF. In detail, the resulting air permeability coefficient tested with a bubble counter differs significantly from the coefficient tested by PermeaTORR.",
author = "Joachim Juhart and Rok Bregar and David, {Gheorghe Alexandru} and Markus Kr{\"u}ger",
year = "2019",
month = "10",
day = "18",
doi = "10.21809/rilemtechlett.2019.86",
language = "English",
volume = "4",
pages = "67--73",
journal = "RILEM Technical Letters",
issn = "2518-0231",
publisher = "RILEM Publications SARL",

}

TY - JOUR

T1 - Air permeability, water penetration and water absorption to specify durability of eco-efficient concrete

AU - Juhart, Joachim

AU - Bregar, Rok

AU - David, Gheorghe Alexandru

AU - Krüger, Markus

PY - 2019/10/18

Y1 - 2019/10/18

N2 - The durability of eco-efficient, clinker reduced concrete is a key factor of its performance. In the presented study, different durability indicators of a newly developed eco-concrete composition (ECO) are tested versus standard normal concrete as reference (REF). The tested durability indicators are open porosity, water penetration depth, rate of water absorption by capillarity and two different methods of measuring air permeability (PermeaTORR AC device versus Testing bubble counter). The ECO mix and in particular its cementitious matrix is designed by a combined filler concept substituting Portland cement partially by properly selected limestone fillers of different grain sizes. The approach is based on a combination of particle packing optimization techniques and the reduction of water demand for certain flowability of the paste. Cement content is below the limits of traditional standards while w/c-ratio exceed such limits. While the performance of the eco-concrete in terms of workability and strength is at least equivalent to the standard mix, ecological impact indicators as global warming potential and embodied energy are substantially improved. Durability indicators overall show nearly equivalent performance of ECO and REF. In detail, the resulting air permeability coefficient tested with a bubble counter differs significantly from the coefficient tested by PermeaTORR.

AB - The durability of eco-efficient, clinker reduced concrete is a key factor of its performance. In the presented study, different durability indicators of a newly developed eco-concrete composition (ECO) are tested versus standard normal concrete as reference (REF). The tested durability indicators are open porosity, water penetration depth, rate of water absorption by capillarity and two different methods of measuring air permeability (PermeaTORR AC device versus Testing bubble counter). The ECO mix and in particular its cementitious matrix is designed by a combined filler concept substituting Portland cement partially by properly selected limestone fillers of different grain sizes. The approach is based on a combination of particle packing optimization techniques and the reduction of water demand for certain flowability of the paste. Cement content is below the limits of traditional standards while w/c-ratio exceed such limits. While the performance of the eco-concrete in terms of workability and strength is at least equivalent to the standard mix, ecological impact indicators as global warming potential and embodied energy are substantially improved. Durability indicators overall show nearly equivalent performance of ECO and REF. In detail, the resulting air permeability coefficient tested with a bubble counter differs significantly from the coefficient tested by PermeaTORR.

U2 - 10.21809/rilemtechlett.2019.86

DO - 10.21809/rilemtechlett.2019.86

M3 - Article

VL - 4

SP - 67

EP - 73

JO - RILEM Technical Letters

JF - RILEM Technical Letters

SN - 2518-0231

ER -