Failure of Lightweight Aggregate Concrete in Compression under Stress Gradients

Open access

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.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • 1. Zivkovic J & Øverli J A: “Ultimate compressive strain in lightweight aggregate concrete beams”. Proceedings 12th fib International PhD Symposium in Civil Engineering Prague Czech Republic August 2018 pp. 829–836.

  • 2. Nedrelid H: “Towards a better understanding of the ultimate behavior of lightweight aggregate concrete in compression and bending”. Bulletin No.123 (PhD Thesis) Norwegian University of Science and Technology Department of Structural Engineering Trondheim Norway 2012 214 pp.

  • 3. Øverli J A: “Towards a better understanding of the ultimate behavior of LWAC in compression and bending”. Engineering Structures No. 151 2018 pp. 821–838.

  • 4. Markeset G: “Failure of concrete under compressive strain gradients”. Bulletin No.110 (PhD Thesis) Norwegian Institute of Technology Department of Structural Engineering University of Trondheim Trondheim Norway1993 168 pp.

  • 5. Carolina Stalite Company: “Production of Stalite”. Salisbury North Carolina USA available: https://www.stalite.com/production.

  • 6. Standard Norge: “Testing hardened concrete - Compressive strength of test specimens”. Part 3 NS-EN 12390-3:2009 Lysaker Norway 2009 24 pp.

  • 7. Standard Norge: “Testing hardened concrete – Tensile strength of test specimens”. Part 6 NS-EN 12390-6:2009 Lysaker Norway 2009 16 pp.

  • 8. Skjølsvold O Bakken N & Johansen E : “Bestemmelse av E-modul iht NS3676 Losenhausen 5000kN trykkpresse”. Betong og natursteinslaboratooriene KS 14-05-04 122 SINTEF Byggforsk Trondheim Norge 2007. (in Norwegian)

  • 9. Standard Norge: “Concrete testing - Hardened concrete - Modules of elasticity in compression”. NS 3676 Norway 1987 20 pp.

  • 10. Hillerborg A: “The theoretical basis of a method to determine the fracture energy GF of concrete”. RILEM Technical Committees Materials and Structures Vol. 18 Issue 4 2005 pp. 291-296.

  • 11. Carolina Stalite Company: “Benefits of using Stalite”. North Carolina USA accessed October 21. 2009. http://www.stalite.com/why-use-stalite.php?cat=138.html.

  • 12. American Concrete Institute: “Guide for structural lightweight aggregate concrete”. ACI213R–03 Farmington Hills MI United States 2003 38 pp.

  • 13. Savija B Lukovic M Kotteman G Chaves F S de Mendoca Filho F F & Schlangen E: “Development of ductile cementitious composites incorporating microencapsulated phase change materials”. International Journal of Advances in Engineering Sciences and Applied Mathematics Vol. 9 Issue 3 2017 pp. 169-180.

  • 14. Kuraray Co: “Characteristics of KURALON (PVA fibres) PVA fibres-application”. Japan available: http://kuralon-frc.kuraray.com/product-application

  • 15. Standard Norge: “Testing hardened concrete - Density of hardened concrete”. Part 7 NS-EN 12390-7:2009 Lysaker Norway 2009 16 pp.

  • 16. European Union – Brite EuRam III: “Methods for Testing Fresh Lightweight Aggregate Concrete”. BE96-3942/R4 December1999 51 pp.

  • 17. McCormick N & Lord J: “Digital Image Correlation for Structural Measurements”. ICE institution Civil Engineering 165 (CE4) 2012 pp. 185–190.

  • 18. SINTEF procedure:“Fracture energy of prisms with notch in three point bending test”. KS14-05-04123 September 2007 3pp.

  • 19. European committee for standardization: “Eurocode 2: Design of concrete structures – General rules and rules for buildings”. Part 1-1 EN 1992-1-1 (2004) 2004 225 pp.

Search
Journal information
Metrics
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 41 41 7
PDF Downloads 33 33 7