Behavior of Ferro-Cement Slabs Modified by Polymer under Low Velocity Impact

Abstract:

Ferro-cement is a type of thin reinforced concrete made of cement-sand mortar mixture with closely spaced of relatively small diameter wire meshes. The main aim of this work was to study investigate the behavior of Ferro-cement slabs under impact loading. A total of 36 Ferro-cement slabs were constructed and tested under low velocity impact, The main parameter considered in the present investigation was number of wire mesh layers, content of (SBR) polymer and height of falling mass (falling velocity). A special testing rig was used to achieve the impact forces using a falling mass (1300 gm steel ball) dropped from (2.5, 1.2 and 0.83 m) height. (500 ×500×50 mm) slabs were used for each test. The polymer (SBR) was used as a ratio by weight of cement of 3%, 5% and 10%. The number of required blows for caused the first crack and final failure was recorded. The results exhibited that the number of blows which were required to make the first crack and failure, increased with increase of polymer content and number of wire mesh layers.

• Periodical: Advanced Materials Research (Volume 925)
• Pages: 3-7
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.925.3
• Online since: April 2014
• Authors: Abdulkader Ismail Al-Hadithi*, Khalil Ibrahim Aziz, Mohammed Tarrad Nawar Al-Dulaimi
• Keywords: Chicken Wire, Ferro-Cement Slab, First Crack, Impact, Polymer, Ultimate Failure, Wire Mesh

References

[1] Walks, B. R., Testing and Test Methods for Ferrocement, Journal of Ferrocement, Vol. 16, No. 1, January (1986).

[2] Kalita, U.C., Nambiar, M.K.C., Borthakur, B.C., and Baruah, P., Ferrocement Roof for Low-Cost Housing, India Concrete , Journal, July (1986).

[3] Desayi, P., Viswanatha , C.S. and Hubli, G.K., Ferrocement Precast Elements for Roofing of Low-Cost Housing, Journal of Ferrocement, Vol. 13, No. 1, January1983.

[4] Fukuchi, T., Ohama, Y., Manufacturing High Strength Concrete, International Symposium, SP-58, ACI. Detroit, 1978, pp.215-224.

[5] Al- Rifaie, W.N., and Aziz, A.A., Thin Ferrocement Bearing Walls,. Journal of Ferrocement, Vol. 25, No. 3, July (1995).

[6] Paul, B. K., and Pama, R. P., Ferrocement, a Publication of International Ferrocement Information Center, Asian Institute of Technology, Bangkok, Thailand, Aug. 1978, pp.1-145.

[7] Al-Rifaie, W.N., and Hassan, A.H., Structural Behavior of Thin Ferrocement One - way Bending Elements, Journal of Ferrocement, Vol. 24, April 1994, pp.115-126.

[8] ACI Committee 544, Measurement of Properties of Fiber Reinforced Concrete, ACI 544. 2R, ACI Materials J., November-December, Vol. 85, No. 6.

DOI: 10.14359/2355

[9] Nillson, L. and Sahlin , S., Impact of a Steel Rod on a Reinforced Concrete Structures, SP-73, Dynamic Modeling of Concrete Structures, (1982).

[10] Iraqi specifications - No(5), Portland Cement, (1999).

[11] Iraqi specifications - No(45), Natural aggregate used in concrete and building, Iraqi central organization for standardization and quality control. Ministry of Planning, Baghdad, Iraq, (1999).

[12] ASTM CI43-89 Standard Test Method for Slump of Hydraulic Cement Concrete, Annual Book of ASTM Standard, Philadeghia, Vol. 04-02, 1989, pp.85-86.

[13] Ohama, Y., Recent Progress in Concrete Polymer Composites, Advanced Cement Based Materials, New York. 1997, pp.31-40.

DOI: 10.1016/s1065-7355(96)00005-3

[14] ASTM CI92-88 Standard Practice for Making and Curing Test Specimens in the Laboratory, Annual Book of ASTM Standard, Philadeghia, Vol. 04-02, 1988, pp.112-118‏.

[15] Ohama, Y., and Sugahara, T., Impact Resistance of Steel Fiber Reinforced Polymer Concrete , the Twenty Fourth Japan Congress on Materials Research. The Society of Material Science, Japan, 1981, pp.254-257.