TY - JOUR

T1 - Design approach and properties of a new generation of sustainable structural concretes

AU - Müller, Harald S.

AU - Haist, Michael

AU - Vogel, Michael

AU - Moffatt, Jack S.

N1 - Funding Information: The authors would like to thank the Helmholtz Association for funding this research.

PY - 2018

Y1 - 2018

N2 - Sustainable concretes, also termed eco-concretes or green concretes, produced with a significantly reduced cement content provide a promising alternative for improving concrete sustainability without using supplementary cementitious materials, such as fly ash or slag. However, the production of such eco-concretes is a challenge in view of concrete technology and concrete properties. In particular, new design concepts as well as new admixtures have to be developed and applied to produce concretes with a cement content of approx. 100 kg/m? While keeping the concrete performance on a level similar to ordinary structural concrete of today. To evaluate the sustainability of these new types of concretes not only the very low ecological impact due to the composition may be regarded, but in addition also their technical performance, i.e. Their mechanical, physical and chemical properties have to be taken into consideration. This contribution firstly gives an overview on sustainable approaches for concrete structures, further introduces the Building Material Sustainability Potential as an index, which is applied in combination with the service life prediction for cement-reduced concretes using full probabilistic methods. The composition of these particular structural concretes is discussed and related test results for their performance are presented. The contribution closes with an introduction to graded concrete members as an innovative approach for the improvement of concrete sustainability on a structural level and presents testing results for mechanical and durability properties of graded bending beams.

AB - Sustainable concretes, also termed eco-concretes or green concretes, produced with a significantly reduced cement content provide a promising alternative for improving concrete sustainability without using supplementary cementitious materials, such as fly ash or slag. However, the production of such eco-concretes is a challenge in view of concrete technology and concrete properties. In particular, new design concepts as well as new admixtures have to be developed and applied to produce concretes with a cement content of approx. 100 kg/m? While keeping the concrete performance on a level similar to ordinary structural concrete of today. To evaluate the sustainability of these new types of concretes not only the very low ecological impact due to the composition may be regarded, but in addition also their technical performance, i.e. Their mechanical, physical and chemical properties have to be taken into consideration. This contribution firstly gives an overview on sustainable approaches for concrete structures, further introduces the Building Material Sustainability Potential as an index, which is applied in combination with the service life prediction for cement-reduced concretes using full probabilistic methods. The composition of these particular structural concretes is discussed and related test results for their performance are presented. The contribution closes with an introduction to graded concrete members as an innovative approach for the improvement of concrete sustainability on a structural level and presents testing results for mechanical and durability properties of graded bending beams.

KW - Cement-reduced concrete

KW - Durability

KW - Graded concrete members

KW - Green concrete

KW - Performance testing

KW - Service life

KW - Sustainability potential

UR - http://www.scopus.com/inward/record.url?scp=85057602662&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85057602662

VL - 2018-June

JO - American Concrete Institute, ACI Special Publication

JF - American Concrete Institute, ACI Special Publication

SN - 0193-2527

IS - SP 326

T2 - 2nd International Workshop on Durability and Sustainability of Concrete Structures, DSCS 2018

Y2 - 6 June 2018 through 7 June 2018

ER -