PROPERTIES OF CEMENT MORTARS REINFORCED WITH POLYPROPYLENE FIBERS

In this paper, the effect of polypropylene fibers (PF) on fresh and hardened properties of cement mortars produced with white cement is reported. Nine mixtures were prepared by using different volume fractions and different sizes of PF from 0 to 1.5% and 6 and 12 mm, respectively. Water to cement and sand to cement ratio by weight was kept constant as 0.4 and 3.0, respectively. PF with different length and amounts was introduced to mixtures and its effect on workability, density, water absorption, compressive strength, flexural strength and drying shrinkage were determined. Pore ratio at the cross-section of the specimens was calculated by image analysis. Test results showed that the addition of PF in higher amounts decreased workability, fresh and hardened density, compressive and flexural strength and increased water absorption and pore ratio of the mixtures. However when used in lower amounts, PF improved drying shrinkage and flexural strength.

Keywords:

Polypropylene fiber, mechanical properties workability, drying shrinkage, pore ratio.,

PDF

___

[1] T. Aly, J.G. Sanjanyan, F. Collins. Effect of polypropylene fibers on shrinkage and cracking of concretes. Mater. Struct., 41: 1741-1753, 2008.
[2] S. Kakooei, H. Akil, M. Jamshidi et. al. The effects of polypropylene fibers on the properties of reinforced concrete structures. Cons. Build. Mater., 27: 73-77, 2012.
[3] Z. Zhang., D. Feldman. Synthetic fiber-reinforced concrete. Progress in Polymer Science, 20: 185-210, 1995.
[4] H.A. Toutanji. Properties of polypropylene fiber reinforced silica fume expansive-cement concrete. Cons. Build. Mater., 13: 171-177, 1999.
[5] D.J. Hannant. Fibre reinforced concrete. In Advanced concrete technology-processes (Newman J, Choo BS, (eds)). Oxford: An imprint of Elsevier, vol. 6, pp. 146-163, 2003.
[6] C.X. Qian, P. Stroven. Development of hybrid polypropylene-steel-fibre-reinforced concrete. Cem. Concr. Res., 30: 63-69, 2000.
[7] R.D. Toledo Filho, K. Ghavami, M.A. Sanjuan et.al. Free, restrained and drying shrinkage of cement mortar composites reinforced with vegetables fibres. Cem. Concr. Compos., 27: 537-546, 2005.
[8] Z.J. Grdic, G.A. Toplicic Curcic, N.S. Ristic et.al. Abrasion resistance of concrete micro-reinforced with polypropylene fibers. Cons. Build. Mater., 27: 305-312, 2012.
[9] H.A. Mesbah, F. Buyle-Bodin. Efficiency of polypropylene and metallic fibres on control of shrinkage and cracking of recycled aggregate mortars. Cons. Build. Mater., 13: 439-477, 1999.
[10] M. Nili, V. Afroughsabet. The effects of silica fume and polypropylene fibers on the impact resistance and mechanical properties of concrete. Cons. Build. Mater., 24: 927-933, 2010.
[11] Z. Sun, Q. Xu. Microscopic, physical and mechanical analysis of polypropylene fiber reinforced concrete. Mater. Science Engineering, 527: 198-204, 2009.
[12] O. Karahan, C.D. Atis. The durability properties of polypropylene fiber reinforced fly ash concrete. Mater. & Design, 32: 1044-1049, 2011.
[13] M. Shekarchi, N.A. Libre, I. Mehdipour et.al. Shrinkage of highly flowable mortar reinforced with polypropylene fiber. In Proceedings of papers of the 3rd international conference ACF/VCA on sustainable concrete technology and structures in local climate and environment conditions. (Dich NT, Long LD, Hoang TM, Hung LV, Thu Ha TT, Hao LT, (eds)). 2008, Vietnam, pp. 210-216.
[14] F. Puertas, T. Amat, A. Fernandez-Jimenez et.al. Mechanical and durable behavior of alkaline cement mortars reinforced with polypropylene fibers. Cem. Concr. Res., 33: 2031-2036, 2003.
[15] B. Felekoglu, S. Turkel, Y. Altuntas. Effects of steel fiber reinforcement on surface wear resistance of self-compacting repair mortars. Cem. Concr. Compos., 29: 391-396, 2007.
[16] B. Chen, J. Liu. Contribution of hybrid fibers on the properties of the high-strength lightweight concrete having good workability. Cem. Concr. Res., 35: 913-917, 2005.
[17] İ.B. Topcu, M. Canbaz. Effect of different fibers on the mechanical properties of concrete containing fly ash. Cons. Build. Mater., 21: 1486-1491, 2007.
[18] S.T. Kang, B.Y. Lee, J.K. Kim et.al. The effect of fibre distribution characteristics on the flexural strength of steel fibre-reinforced ultra-high strength concrete. Cons. Build. Mater., 25: 2450-2457, 2011.
[19] J. Zhou, S. Qian, G. Ye et.al. Improved fiber distribution and mechanical properties of engineered cementitious composites by adjusting the mixing sequence. Cem. Concr. Compos., 34: 342-348, 2012.
[20] R.M. Gutierrez, L.N. Diaz, S. Delvasto. Effect of pozzolans on the performance of fiber reinforced mortars. Cem. Concr. Compos., 27: 593-598, 2005.

Sigma Mühendislik ve Fen Bilimleri Dergisi-Cover

ISSN: 1304-7191
Yayın Aralığı: Yılda 4 Sayı
Yayıncı: Yıldız Teknik Üniversitesi

Arşiv