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Concrete Research Letters    [3 followers]  Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 2180-1371
     Published by ISSR Journals Homepage  [3 journals]
    • Authors: Saeed Ahmed Alsheikh
      PubDate: 2013-10-26
      Issue No: Vol. 4 (2013)
  • Structural Behavior of Composite Reinforced Ferrocement Plates
    • Authors: Yousry B.I Shaheen, Mohamed A Safan, Ashwaq M Hafiz
      Abstract: The results of an experimental investigation to examine the structural behavior of composite reinforced ferrocement concrete plates are presented in this paper. The precast permanent ferrocement forms are proposed as a viable alternative to the steel panels in some of its uses. The experimental program comprised casting and testing of eighteen reinforced ferrocement plates having the dimensions of 550mm width, 1100mm length and different thicknesses (60, 80,100) mm. Each control plate was reinforced with four steel bars of 6mm diameter at the bottom of the plate and six steel bars of 6mm diameter at the transverse direction. Two types of steel mesh were used to reinforce the ferrocement plates. These types are: (12 X 12 mm) welded wire mesh, and (33 X 16.5mm) expanded wire mesh. Single layer, double layers and three layers of each type of the steel mesh were employed. All specimens were tested under 3-lines flexural loadings. The flexural performances of the all tested plates in terms of strength, stiffness, cracking behavior and energy absorption were investigated. The results showed that high serviceability and ultimate loads, crack resistance control, and good energy absorption properties could be achieved by using the developed ferrocement plates.
      PubDate: 2013-10-26
      Issue No: Vol. 4 (2013)
  • Study of Sorptivity of Self-Compacting Concrete with Different Chemical
    • Authors: Saeed Ahmed Alsheikh
      Abstract: The influence of chemical admixtures on the properties of Self-Compacting Concrete (SCC)
      was investigated. All types of used admixtures were the same percentage of 1.4% according technical
      data. The water – cement ratio was maintained at 0.36 for all mixes [8] [9].
      The paper presents test results for acceptance characteristics of flow ability, resistance against
      segregation, and passing ability of self-compacting concrete in fresh state. Further, mechanical
      properties of hardened concrete such as compressive, tensile and flexural strength at the ages of 7 and
      28 were also determined, and results of Absorption and sorptivity result are included here.
      The results indicate that Sika ViscoCrete 3425 and AddiCrete BVS 100 give better results for
      all tests.
      PubDate: 2013-10-26
      Issue No: Vol. 4 (2013)
  • The Stability of Fresh Zero-Slump Concrete
    • Authors: Christian Otto Sørensen
      Abstract: This report focuses upon the effects of cement-substitution in part by two potash feldspar powders, and by silica-fume, on the fresh concrete strength of newly compacted cylinder samples. The water/cement-ratio was kept constant at 0.31. An Intensive Compaction Tester (abbrev: IC-Tester) which exerts a slow kneading action under pressure on the sample in a cylindrical mold, was utilized. It was found that the fresh cylinder compressive strength increased with decreasing water-content and more than doubled with each of the 3 fillers replacing 30 % of the cement-volume. A tradeoff was a loss in 28-day compressive strength for both of the feldspars, while the 28-day strength of the silica-samples remained virtually unaffected.
      PubDate: 2013-10-26
      Issue No: Vol. 4 (2013)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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