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Journal Cover Concrete Research Letters
  [2 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2180-1371
   Published by ISSR Journals Homepage  [3 journals]
  • Structural Behavior of Light Weight Ferrocement Columns

    • Authors: zeinab A. Etman
      Abstract: This paper presents the results of the behavior of reinforced ferrocement light weight columns by permanent precast lightweight ferrocement hollow blocks. For this objective, an experimental program was carried out extensively and finite element models with ANSYS 14.5 were conducted. The program of the experimental constructed and testing of sixteen columns of total dimensions 450×650×250 mm consisting of 3 permanent precast lightweight ferrocement hollow blocks having the dimensions of 200×400×200 mm filled with core material. Two types of light weight ferrocemnet hollow blocks were used to construct the columns. Two types of single layer welded steel mesh and glass fiber mesh were used as a horizontal connection between the permanent precast lightweight ferrocement hollow blocks. The core material was investigated: one layer of welded steel mesh embedded in the matrix. Welded steel mesh with single and double layers was used to reinforce the plastering layer as a bonding layers forms; namely welded steel mesh. Shear connections between the permanent precast hollow blocks and the core material were investigated called; shear connector. The columns were tested under uniform load. The behavior of the columns was compared. The results showed that an improvement in the cracks resistance, serviceability loads, ultimate loads, and energy absorption. Theses results were verifies the validity of the proposed model. Good agreement was found compared with the experimental results. Out of this research, this paper presents applications of  using light weight ferrocement  units in construction of low-cost housing which are very useful for developed and developing countries alike with great economic advantages.  
      PubDate: 2016-04-02
      Issue No: Vol. 7 (2016)
       
  • Behavior of Ferrocement Sandwich Panels Slabs under Shear

    • Authors: Amal Abdel-Hady Nasser
      Abstract: A sandwich panel consists of two thin skin layers of ferrocement layers; separated by a thick layer of polystyrene core. This type is considered a light weight building materials section. Effect of silica fume on concrete properties was investigated to determine the optimum percentage of silica fume as cement replacement. Twelve composite slabs 120cm*120cm and 14cm thick were cast. Light weight composite slabs were subjected to central load. The use of metal mesh was proposed as a viable alternative to ordinary steel bars in reinforcing ferrocement plates. Additional mild steel bars were used with steel mesh to enhance the mechanical behavior of the composite slab. Using lightweight materials lead to decrease the weight of structural member's and consequently decrease the overall dead load of the building. The study included comparisons between flexural strength, crack pattern, first crack load, and deflection under different stages of loading of the tested sandwich panels. 
      PubDate: 2016-04-02
      Issue No: Vol. 7 (2016)
       
  • Comparative Studies on Mechanical Properties of High Strength Concrete
           Using Foundry Slag and Alccofine

    • Authors: Devinder Sharma, Sanjay Sharma, Ajay Goyal
      Abstract: The main purpose of this research study is to compare the strength properties (Mechanical) of High Strength Concrete(HSC) using Foundry Slag(FD) and Alccofine(AF) for different curing ages(7, 14, 28, 56 and 90 days). This paper discussed the use of Foundry Slag(FD) as partial replacement for conventional fine aggregates and Alccofine (AF) as partial substitute for cement. Concrete specimens of M100 grade using water/binder ratio 0.239, with varying percentage of FD (0 to 50%) and with optimum percentage of AF(15%) were casted and tested for development of compressive strength(CS), tensile strength(TS) and flexural strength(FS) after curing age of 7, 14, 28, 56 and 90 days. Results suggested that reasonably high strength concrete can be prepared by replacing fine aggregates(FA) with FD and cement with 15% of AF. Results showed increase in mechanical properties ( CS, TS and FS) of HSC with increase in FD content up to 45% and with  age. A straight line equation from the regression analysis has been formed from the results obtained by means of best fit.
      PubDate: 2016-04-02
      Issue No: Vol. 7 (2016)
       
 
 
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