<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The objective of this experiment is to investigate the behaviour of lightweight aggregate concrete (LWAC) under compression and with stress gradients. Experimental program contained three sets of LWAC which were used for production of 21 prisms. Lightweight aggregate argillite slate, called Stalite, from North Carolina had been used. The sets differed in using dry (0.10% moisture content) or saturated (7.9% moisture content) aggregate. The third set included a small amount of polyvinyl alcohol fibres (PVA). The geometry of the prisms were 100 × 140 × 480 mm (width × length × height). Prismatic samples were loaded centrically and eccentrically in compression.</p><p>From the achieved experimental results, it is visible that the lateral deformation of the most stressed fibre is counteracted by the less stressed fibres that confine compressive stress and increase strains. The obtained strain level was much higher than expected, especially for the third set of concrete samples with PVA fibres. Recorded strains in prisms test was in range from 3.08‰ to 6.82‰). In general, LWAC with Stalite showed ductile behaviour followed with very high strains. The third set of samples included a small amount of polyvinyl alcohol fibres (0.5% of volume fractions) was even more ductile and non-brittle.</p></abstract>

The objective of this experiment is to investigate the behaviour of lightweight aggregate concrete (LWAC) under compression and with stress gradients. Experimental program contained three sets of LWAC which were used for production of 21 prisms. Lightweight aggregate argillite slate, called Stalite, from North Carolina had been used. The sets differed in using dry (0.10% moisture content) or saturated (7.9% moisture content) aggregate. The third set included a small amount of polyvinyl alcohol fibres (PVA). The geometry of the prisms were 100 × 140 × 480 mm (width × length × height). Prismatic samples were loaded centrically and eccentrically in compression.From the achieved experimental results, it is visible that the lateral deformation of the most stressed fibre is counteracted by the less stressed fibres that confine compressive stress and increase strains. The obtained strain level was much higher than expected, especially for the third set of concrete samples with PVA fibres. Recorded strains in prisms test was in range from 3.08‰ to 6.82‰). In general, LWAC with Stalite showed ductile behaviour followed with very high strains. The third set of samples included a small amount of polyvinyl alcohol fibres (0.5% of volume fractions) was even more ductile and non-brittle.

Failure of Lightweight Aggregate Concrete in Compression under Stress Gradients

Department of Structural Engineering, Faculty of Engineering Science

Norwegian University of Science and Technology

Nordic Concrete Research

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

{"article-title":"Failure of Lightweight Aggregate Concrete in Compression under Stress Gradients"}

The objective of this experiment is to investigate the behaviour of lightweight aggregate concrete (LWAC) under compression and with stress gradients....

Failure of Lightweight Aggregate Concrete in Compression under Stress Gradients

Published Online: Jul 20, 2019

Page range: 51 - 66

Received: Apr 01, 2019

Accepted: Jun 25, 2019

DOI: https://doi.org/10.2478/ncr-2019-0011

Keywords
Lightweight Aggregate Concrete, Testing in Compression, Strain level, Centric and Eccentric Loading, Stress Gradients

© 2019 Jelena Zivkovic et al., published by Sciendo

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

Failure of Lightweight Aggregate Concrete in Compression under Stress Gradients

Published Online: Jul 20, 2019

Page range: 51 - 66

Received: Apr 01, 2019

Accepted: Jun 25, 2019

DOI: https://doi.org/10.2478/ncr-2019-0011

KeywordsLightweight Aggregate Concrete, Testing in Compression, Strain level, Centric and Eccentric Loading, Stress Gradients

© 2019 Jelena Zivkovic et al., published by Sciendo

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

Keywords
Lightweight Aggregate Concrete, Testing in Compression, Strain level, Centric and Eccentric Loading, Stress Gradients