CHAPTER 7 Conclusion and Future Prospects
7.3 Concluding Statement
The aim of this study was to improve the general understanding of cracked macro synthetic fibre reinforced concrete (FRC) using fibres with various geometrical properties. Significant insight was gained on the single-fibre and macro mechanical behaviour of FRC. However, much remains unknown about the mechanisms in the cracked FRC state, especially during extensive crack opening as well as the use of longer fibre lengths. Furthermore, concerning behaviour was observed on the single-fibre level under time dependent pull-out, thus creating enough room for additional research. Nevertheless, macro synthetic FRC is believed to possess the potential for delivering more economic concrete designs, aiming to replace conventional steel mesh in ground supported slabs.
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References
ACI 211.1-91, 1999. Standard Practice for Selecting Proportions for Normal, Heavyweight,
and Mass Concrete, Farmington Hills, Michigan: American Concrete Institute.
ACI 544.1R-96, 1996. Report on fibre reinforced concrete. Farmington Hills, Michigan:
American Concrete Institute, p.58.
ACI Committee 544, 2002. State-of-the-Art Report on Fiber Reinforced Concrete Reported by ACI Committee 544. ACI Structural Journal, 96(Reapproved).
Addis, B., 2013. Fundamentals of concrete G. Owens, ed., Midrand, South Africa: Cement and Concrete Institute.
Addis, B. & Goodman, J., 2009. Concrete mix design. In Fulton’s Concrete Technology. Midrand, South Africa: Cement and Concrete Institute, pp. 219–228.
Aitcin, P.C., 2000. Cements of yesterday and today, concrete of tomorrow. Cement and
Concrete Research, 30, pp.1349–1359.
Alani, A.M. & Aboutalebi, M., 2013. Mechanical Properties of Fibre Reinforced Concrete - A Comparative Experimental Study. International Journal of Civil, Environmental,
Structural, Construction and Architectural Engineering, (9), pp.318–323.
Alberti, M.G., Enfedaque, a. & Gálvez, J.C., 2014. On the mechanical properties and fracture behavior of polyolefin fiber-reinforced self-compacting concrete. Construction
and Building Materials, 55, pp.274–288. Available at:
http://linkinghub.elsevier.com/retrieve/pii/S0950061814000488 [Accessed March 9, 2014].
American Society for Testing and Materials, 2012. Standard Test Method for Flexural
Performance of Fiber-Reinforced Concrete (Using Beam With Third-Point Loading),
West Conshohocken.
American Society for Testing and Materials, 2010. Standard Test Method for Obtaining
Average Residual-Strength of Fibre-Reinforced Concrete, West Conshohocken.
Arkles, B., 2006. Hydrophobicity, hydrophilicity and silanes. Paint & Coatings Industry
Magazine, (October). Available at:
http://scholar.google.com/scholar?hl=en&btnG=Search&q=intitle:Hydrophobicity,+Hyd rophilicity+and+silanes#0 [Accessed July 22, 2014].
ASTM C1550-12, 2012. Standard Test Method for Flexural Toughness of Fiber Reinforced Concrete (Using Centrally Loaded Round Panel). ASTM International.
Babafemi, A., 2015. Tensile creep of cracked macro synthetic fibre reinforced concrete. Stellenbosch University.
Babafemi, A. & Boshoff, W., 2014. Tensile creep of macro-synthetic fibre reinforced concrete (MSFRC) under uni-axial tensile loading. Cement & concrete composites, 55, pp.62–69. Available at: http://scholar.sun.ac.za/handle/10019.1/89619 [Accessed August 3, 2014].
Banthia, N. & Boyd, A., 2000. Sprayed fibre-reinforced polymers for repairs TT -. Canadian
Journal of Civil Engineering TA -, 27, pp.907–915.
142
Reinforced Polymer Concrete Composites. Journal of Materials and Engineering
Structures, 1(2), pp.99–109. Available at:
http://revue.ummto.dz/index.php/JMES/article/view/192.
Beglarigale, A. & Yazici, H., 2015. Pull-out behavior of steel fiber embedded in flowable RPC and ordinary mortar. JCBM Construction and Building Materials, 75, pp.255–265. Bentur, A. & Mindess, S., 2006. Fibre reinforced cementitious composites, CRC Press. Bernard, E.S., 2002. Correlations in the behaviour of fibre reinforced shotcrete beam and
panel specimens. Materials and Structures, 35(3), pp.156–164. Available at: http://dx.doi.org/10.1007/BF02533584.
Bolat, H. et al., 2014. The effects of macro synthetic fiber reinforcement use on physical and mechanical properties of concrete. Composites Part B: Engineering, 61, pp.191–198. Available at: http://linkinghub.elsevier.com/retrieve/pii/S1359836814000535 [Accessed July 16, 2014].
Buratti, N., Mazzotti, C. & Savoia, M., 2011. Post-cracking behaviour of steel and macro- synthetic fibre-reinforced concretes. Construction and Building Materials, 25(5),
pp.2713–2722. Available at:
http://linkinghub.elsevier.com/retrieve/pii/S0950061810006999 [Accessed March 9, 2014].
Caggiano, A. et al., 2012. Fracture behaviour of concrete beams reinforced with mixed long/short steel fibre. Construction and Building Materials, 37, pp.832–840.
Chira, A. et al., 2016. Property improvements of alkali resistant glass fibres/epoxy composite with nanosilica for textile reinforced concrete applications TT -. Materials & Design TA
-, 89, pp.146–155.
Coleman, H.W. & Steele, W.G., 2009. Experimentation, Validation, and Uncertainty
Analysis for Engineers, Wiley. Available at:
https://books.google.co.za/books?id=6VJ_7cCW3VkC.
Concrete Society, 2013. Concrete industrial ground floors : A guide to design and
construction, Camberley, Surrey: Concrete Society.
Concrete Society, 2003. Concrete industrial ground floors: A guide to design and
construction, London: Concrete Society.
Concrete Society, 2007. Guidance on the use of macro-synthetic-fibre-reinforced concrete, Camberley: Concrete Society.
Ding, Y. & Kusterle, W., 1999. Comparative study of steel fibre-reinforced concrete and steel mesh-reinforced concrete at early ages in panel tests. Cement and Concrete Research. Available at: http://www.sciencedirect.com/science/article/pii/S0008884699001775 [Accessed October 28, 2014].
Domone, P. & Illston, J., 2010. Construction materials: their nature and behaviour - 4th
edition 4th ed., SPON Press. Available at: Stellenbosch University Engineering and
Forestry Library [Accessed April 27, 2015].
EN 14651, 2005. Test method for metallic fibred concrete - Measuring the flexural tensile
strength (limit of proportionality (LOP), residual), BSI.
143 and conformity.
EN 14889-2, 2006. Fibres for Concrete: Part 2: 2006. Polymer Fibres: Definitions, specifications and conformity.
European Federation of National Associations of Specialist Contractors and Material Suppliers for the Construction Industry, 2011. EFNARC Three Point Bending Test on
Square Panel with Notch,
European Federation of National Associations of Specialist Contractors and Material Suppliers for the Construction Industry, 1996. European specification for sprayed
concrete,
Gossla, U. & Rieder, K.-A., 2009. Zeitabhängiges Verhalten von Makrokunststofffaserbeton und dessen Einfluss auf die Bemessung von Industriefußböden. Beton- und
Stahlbetonbau, 104(2), pp.76–87. Available at:
http://doi.wiley.com/10.1002/best.200900660 [Accessed March 9, 2014].
Hakamy, A., Shaikh, F.U.A. & Low, I.M., 2015. Effect of calcined nanoclay on microstructural and mechanical properties of chemically treated hemp fabric-reinforced cement nanocomposites TT -. Construction and Building Materials TA -, 95, pp.882– 891.
Hannant, D.J., 1978. Fibre cements and fibre concretes, Chichester; New York: Wiley. Hasan, M.J., Afroz, M. & Mahmud, H.M.I., 2011. An Experimental Investigation on
Mechanical Behavior of Macro Synthetic Fiber Reinforced Concrete. International
Journal of Civil & Environmental Engineering, 11(3), pp.18–23.
JAPAN SOCIETY OF CIVIL ENGINEERING, 1985. Method of test for flexural strength
and flexural toughness of SFRC, JSCE-SF4.
Kaur, G., Singh, S.P. & Kaushik, S.K., 2012. Flexural Fatigue Strength of Steel Fibre Reinforced Concrete Containing Blends of Limestone Powder and Silica Fume.
International Journal of Emerging Technology and Advanced Engineering, 2(6).
Kim, D.J. et al., 2011. Comparative flexural behavior of Hybrid Ultra High Performance Fiber Reinforced Concrete with different macro fibers. Construction and Building
Materials, 25(11), pp.4144–4155. Available at:
http://linkinghub.elsevier.com/retrieve/pii/S0950061811001917 [Accessed July 15, 2014].
Kovler, K., 1995. Interdependence of Creep and Shrinkage for Concrete under Tension TT -.
Journal of Materials in Civil Engineering, 7, pp.96–101.
Li, V.C., Wang, Y. & Backer, S., 1990. Effect of inclining angle, bundling and surface treatment on synthetic fibre pull-out from a cement matrix. Composites, 21(2), pp.132– 140.
MacDonald, F. et al., 2009. CASE HISTORIES USING SYNTHETIC FIBER REINFORCED CONCRETE. Available at: http://dc.engconfintl.org/shotcrete/5/ [Accessed July 23, 2014].
Marotzke, C. & Qiao, L., 1997. Interfacial crack propagation arising in single-fiber pull-out tests TT -. Composites Science and Technology TA -, 57(8), pp.887–897.
144
shotcrete used in weak rock mines. Trans Soc Min Metal Explor TP-09-062.
Minelli, F. & Plizzari, G.A., 2010. Fibre reinforced concrete characterization through round
panel test- Part II: analytical and numerical study, Korea Concrete Institute.
Mouton, C. & Boshoff, W., 2012. Initial study on the tensile creep of cracked steel fibre reinforced concrete. In J. A. O. Barros, ed. 8th RILEM International Symposium on
Fibre Reinforced Concrete: challenges and opportunities (BEFIB 2012). RILEM
Publications SARL, pp. 326–337.
Neville, A.M., 1996. Properties of concrete TT - 4th ed., New York : J. Wiley,.
Odendaal, C.M., 2015. Establishment of performance-based specifications for the structural
use of locally available macro-synthetic fibres. Stellenbosch University.
Parmentier, B. et al., 2008. Dispersion of the mechanical properties of FRC investigated by different bending tests. In Tailor Made Concrete Structures. CRC Press, p. 123. Available at: http://dx.doi.org/10.1201/9781439828410.ch84.
Payrow, P. et al., 2011. Effect of surface treatment on the post-peak residual strength and toughness of polypropylene/polyethylene-blended fiber-reinforced concrete. Journal of
Composite Materials, 45(20), pp.2047–2054.
Perrie, B., 2009. Fibre-reinforced concrete. In Fulton’s Concrete Technology. Midrand, South Africa: Cement and Concrete Institute, pp. 329–336.
Prisco, M., Plizzari, G. & Vandewalle, L., 2009. Fibre reinforced concrete: new design perspectives. Materials and Structures, 42(9), pp.1261–1281. Available at: http://www.springerlink.com/index/10.1617/s11527-009-9529-4 [Accessed July 10, 2014].
Proctor, B.A., 1979. Fibre reinforcement of cement and concrete. Fourth South African
Building Research Congress.
Purnell, P., 1998. The durability of glass-fibre reinforced cements made with new
cementitious matrices’. Aston University, UK.
Purnell, P. & Beddows, J., 2005. Durability and simulated ageing of new matrix glass fibre reinforced concrete TT -. Cement & concrete composites. TA -, 27(9-10), pp.875–884. Richardson, A., 2006. Compressive strength of concrete with polypropylene fibre addition.
Structural Survey, 24(2), pp.138–153.
Richardson, A., Coventry, K. & Landless, S., 2010. Synthetic and steel fibres in concrete with regard to equal toughness. Structural Survey, (December), pp.128–140. Available at: http://www.emeraldinsight.com/journals.htm?articleid=1892016&show=abstract [Accessed August 3, 2014].
RILEM TC 162-TDF, 2003. Final recommendation of RILEM TC 162-TDF: Test and design methods for steel fibre reinforced concrete. Materials and Structures, 36(262), pp.560– 567.
SANS 1083, 2006. Aggregates from natural sources: aggregates for concrete, Pretoria: South African Bureau of Standards.
SANS 50197-1, 2000. Cement. Part 1: Composition, specification and conformity criteria for
145
SANS 5841, 2006. Aggregate crushing value of coarse aggregates, Pretoria: South African Bureau of Standards.
SANS 5844, 2006. Particle and relative densities of aggregates, Pretoria: South African Bureau of Standards.
SANS 5845, 2006. Bulk densities and voids content of aggregates, Pretoria: South African Bureau of Standards.
SANS 5860, 2006. Concrete tests - dimensions, tolerances and use of cast test specimens, Pretoria: South African Bureau of Standards.
SANS 5861-3, 2006. Concrete tests - making and curing of test specimens, Pretoria: South African Bureau of Standards.
SANS 5862-1, 2006. Concrete testing: Consitency of freshly mixed concrete (slump test), Pretoria: South African Bureau of Standards.
SANS 5863, 2006. Concrete tests - compressive strength of hardened concrete, Pretoria: South African Bureau of Standards.
Silverstein, M.S. & Breuer, O., 1993. Wettability and flotation of etched ultra high molecular weight polyethylene fibres. JPOL</cja:jid> Polymer, 34(16), pp.3421–3427.
Soutsos, M.N., Le, T.T. & Lampropoulos, a. P., 2012. Flexural performance of fibre reinforced concrete made with steel and synthetic fibres. Construction and Building
Materials, 36, pp.704–710. Available at:
http://linkinghub.elsevier.com/retrieve/pii/S0950061812004345 [Accessed July 7, 2014].
Tayler, N., 2009. Evaluation of Proficiency Testing Results and the Elimination of Statistical Outliers. In South African National Accreditation System. Available at: http://www.nla.org.za/conferences/2009/2009_papers/Presentations/Tuesday, 15 September/T306 - Evaluation of PT results and the elimination of statistical outliers.pdf. The Concrete Institute, 2013. Fiber Reinforced Concrete. Available at:
http://www.theconcreteinstitute.org.za/wp-content/uploads/2013/10/Fibre- Reinforced.pdf.
Tissington, B., Pollard, G. & Ward, I., 1991. A study on the influence of fiber/resin adhesion on the mechanical behavior of ultra-high-modulus polyethylene fiber composites. Mater
Sci, 26(82).
Toledo Filho, R.D. et al., 2009. Durability of compression molded sisal fiber reinforced mortar laminates TT -. Construction and Building Materials TA -, 23(6), pp.2409– 2420.
Tolêdo Filho, R.D. et al., 2000. Durability of alkali-sensitive sisal and coconut fibres in cement mortar composites TT -. Cement and Concrete Composites TA -, 22(2), pp.127–143.
Walraven, J.C., 2009. High performance fibre reinforced concrete: progress in knowledge and design codes. Materials and Structures, 42(9), pp.1247–1260.
Wei, J. & Meyer, C., 2014. Improving degradation resistance of sisal fiber in concrete through fiber surface treatment TT -. Applied Surface Science TA -, 289, pp.511–523. Wille, K. & Naaman, A.E., 2012. Pullout Behavior of High-Strength Steel Fibers Embedded
146
in Ultra-High-Performance Concrete. ACI Materials Journal, 109(4), pp.479–487.
Available at:
http://ez.sun.ac.za/login?url=http://search.proquest.com/docview/1027122696?accountid =14049.
Wimpenny, D. et al., The use of Steel and Synthetic Fibres in Concrete under Extreme Conditions. , 14889.
Won, J., Lim, D. & Park, C., 2006. Bond behaviour and flexural performance of structural synthetic fibre-reinforced concrete. Magazine of Concrete Research, (6), pp.401–410.
147
Appendix A : Single-Fibre Test Specimen Information
This appendix provides specimen information for the single-fibre investigation of this study.