Effect of Fibre Content on Splitting-Tensile Strength of Wheat Straw Reinforced Concrete for Pavement Applications

Abstract:

Recent studies on compressive and flexural behavior of Wheat Straw Reinforced Concrete (WSRC) showed positive signs for increasing the toughness of concrete. This ultimately will help in reducing the micro-shrinkage cracking in rigid pavements. Splitting-tensile behavior is also an important property which needs to be investigated for WSRC. The overall aim of the research program is the development of economic and durable design for new rigid pavements by using locally available natural fibres in concrete. In this work, splitting-tensile strength of WSRC is investigated experimentally. To study the influence of wheat straw for having concrete with improved properties, Plain Concrete (PC) properties are taken as reference. The proportions of cement, sand and aggregates for PC and WSRC are taken as 1, 2 and 4, respectively. Wheat straw having length of approximately one-inch and contents of 1%, 2%, and 3%, by mass of wet concrete, are used to make WSRC. Water-cement ratios for PC and WSRC are taken as 0.55 and 0.60, respectively. Discussions on splitting-tensile behavior (strength, pre-cracked/cracked energy, and toughness index) of PC and WSRC specimen are made. It is concluded that splitting-tensile toughness index of WSRC is more than that of PC. As results seem favorable, so further study focusing on optimization of materials and durability of WSRC is recommended.

• Periodical: Key Engineering Materials (Volume 765)
• Pages: 349-354
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.765.349
• Online since: March 2018
• Authors: Muhammad Usman Farooqi, Majid Ali*
• Keywords: Fatigue Cracking, Micro-Shrinkage Cracking, Rigid Pavements, Wheat Straw Reinforced Concrete

References

[1] J.E. Hiller, E. Jacob, J.R. Roesler. Determination of Critical Concrete Pavement Fatigue Damage Locations Using Influence Lines. Journal of Transportation Engineering, 131(8), (2015).

DOI: 10.1061/(asce)0733-947x(2005)131:8(599)

[2] A. Bentur and S. Mindess. Fiber reinforced cementitious composites. Modern concrete technology series: Taylor and Francis, (2007).

[3] J.P. Romualdi and G.B. Batson. Mechanics of crack arrest in concrete. Journal of Engineering Mechanics, 89, 1963, 147-168.

DOI: 10.1061/jmcea3.0000381

[4] J.P. Romualdi and J.A. Mandel. Tensile strength of concrete affected by uniformly dispersed and closely spaced short lengths of wire reinforcement. Journal of the American Concrete Institute, 61, 1964, 657-672.

DOI: 10.14359/7801

[5] D. Sinha and C.B. Mishra. Comparison of normal concrete pavement with steel fiber reinforced concrete pavement. Indian Journal of Applied Research, 4(8), 2014, 233-235.

DOI: 10.15373/2249555x/august2014/60

[6] M. Ali, M. Liu, H. Sou, N. Chouw. Mechanical and dynamic properties of coconut fibre reinforced concrete. Construction and Building Materials, 30, 2012, 814-825.

DOI: 10.1016/j.conbuildmat.2011.12.068

[7] F.A. Silva, B. Mobasher, R.D.T. Filho. Cracking mechanisms in durable sisal fiber reinforced cement composites. Cement and Concrete Composites, 31, 2009, 721-730.

DOI: 10.1016/j.cemconcomp.2009.07.004

[8] M. Siviraja, N. Velmani, M.S. Pillai. Study on durability of natural fibre concrete composites using mechanical strength and microstructural properties. Bullet Master Science, 33(6), 2010, 719-29.

DOI: 10.1007/s12034-011-0149-6

[9] D. Patel, V.M. Patel. Application of sugarcane bagasse fibres as concrete composites for rigid pavement. Indian Journal of Research, 4(4), 2015, 4-5.

[10] U. Farooqi and M. Ali. Compressive behavior of wheat straw reinforced concrete for pavement applications. Sustainable Construction Materials and Technologies 4, August 7-11, 2016, Las Vegas, USA.

DOI: 10.18552/2016/scmt4s231

[11] I. Merta, E.K. Tschegg, S.E. Stanzl-Tschegg, A. Kolbitsch. Fracture mechanics of concrete reinforced with hemp, straw and elephant grass fibre. Construction and Building Materials, (2011).

DOI: 10.1016/j.conbuildmat.2012.11.060

[12] C. Asasutjarita, J. Hirunlabha, J. Khedari, S. Charoenvoi, B. Zeghmati, U.C. Shin. Development of coconut coir-based lightweight cement board. Construction and Building Materials, 21(2), 2007, 277-288.

DOI: 10.1016/j.conbuildmat.2005.08.028