<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The surface scaling of low CO<sub>2</sub>-emission High Performance Concretes (HPC) was studied in freeze/thaw performance tests with a 3 mm layer of 3% NaCl on the surface to investigate whether such concretes can be made frost durable without air entrainment. Four different non-air entrained silica fume (SF)-fly ash concrete mixes with w/b = 0.30 – 0.35 with 91d strengths >100 MPa were investigated after 3 different curing conditions (Normal, Dried, Wrapped). The w/b=0.30 CEM IIA reference mix without additional FA had lowest scaling following all curing conditions. However, all 4 mixes at all 3 curing conditions had severe internal damage. Liquid Uptake (LU) during freeze/thaw related best to internal damage. The correlation between LU-scaling and strain-scaling was very good for wrapped curing which also showed high internal damage. We therefore suggest proceeding in modelling simultaneous salt scaling and internal damage.</p>
</abstract>

The surface scaling of low CO2-emission High Performance Concretes (HPC) was studied in freeze/thaw performance tests with a 3 mm layer of 3% NaCl on the surface to investigate whether such concretes can be made frost durable without air entrainment. Four different non-air entrained silica fume (SF)-fly ash concrete mixes with w/b = 0.30 – 0.35 with 91d strengths >100 MPa were investigated after 3 different curing conditions (Normal, Dried, Wrapped). The w/b=0.30 CEM IIA reference mix without additional FA had lowest scaling following all curing conditions. However, all 4 mixes at all 3 curing conditions had severe internal damage. Liquid Uptake (LU) during freeze/thaw related best to internal damage. The correlation between LU-scaling and strain-scaling was very good for wrapped curing which also showed high internal damage. We therefore suggest proceeding in modelling simultaneous salt scaling and internal damage.

Frost-salt Testing Non-air Entrained High-Performance Fly-ash Concrete. Part I: Relations Liquid uptake - Internal Cracking – Scaling

University for Continuing Education Krems

Dept. of Knowledge and Communication Management

Department of Architecture, Materials, and structures

Norwegian University of Science and Technology

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The surface scaling of low CO2-emission High Performance Concretes (HPC) was studied in freeze/thaw performance tests with a 3 mm layer of 3% NaCl on the...

Frost-salt Testing Non-air Entrained High-Performance Fly-ash Concrete. Part I: Relations Liquid uptake - Internal Cracking – Scaling

Online veröffentlicht: 05. Juli 2024

Seitenbereich: 25 - 42

Eingereicht: 15. Dez. 2023

Akzeptiert: 17. Juni 2024

DOI: https://doi.org/10.2478/ncr-2023-0015

Schlüsselwörter
Low carbon concrete, Frost salt scaling, Liquid uptake, Internal damage

© 2024 Iman Asadi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Frost-salt Testing Non-air Entrained High-Performance Fly-ash Concrete. Part I: Relations Liquid uptake - Internal Cracking – Scaling

Online veröffentlicht: 05. Juli 2024

Seitenbereich: 25 - 42

Eingereicht: 15. Dez. 2023

Akzeptiert: 17. Juni 2024

DOI: https://doi.org/10.2478/ncr-2023-0015

SchlüsselwörterLow carbon concrete, Frost salt scaling, Liquid uptake, Internal damage

© 2024 Iman Asadi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Schlüsselwörter
Low carbon concrete, Frost salt scaling, Liquid uptake, Internal damage