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Panda K.C.,Bhadrak Institute of Engineering and Technology | Bhattacharyya S.K.,Central Building Research Institute CBRI | Bhattacharyya S.K.,Indian Institute of Technology Kharagpur | Barai S.V.,Indian Institute of Technology Kharagpur
Indian Concrete Journal | Year: 2010

This paper presents an experimental study on reinforced concrete (RC) T-beams strengthened in shear using epoxy bonded glass fibre fabric. Nine simply supported RC T-beams, with six beams used as control beams with and without shear reinforcements formed the set of specimens. Three beams were strengthened in shear with up to three layers of glass fibre reinforced polymer (GFRP) in U-shape around the web of the T-beams. The specimen beams had six mm diameter stirrups provided at 200 mm spacing. They were tested at the structural engineering laboratory of IIT, Kharagpur using a 300 ton Universal Testing Machine (UTM). The experimental results showed the externally bonded GFRP with internal transverse steel reinforcement contributed significantly to the shear capacity.

Bhatnagar A.,Central Building Research Institute CBRI | Bhatnagar A.,Economy Energy | Minocha A.K.,Central Building Research Institute CBRI
Colloids and Surfaces B: Biointerfaces | Year: 2010

The present study was undertaken to evaluate the feasibility of Punica granatum (pomegranate) peel waste for the removal of nickel from water. Batch experiments were performed to study the biosorption of nickel on prepared pomegranate peel adsorbent. The sorption process was well explained with pseudo-second-order kinetic model. The maximum sorption capacity of pomegranate peel adsorbent for nickel removal was ca. 52 mg g-1. The sorption has been found to be endothermic and data conform to the Langmuir model. The Gibbs free energy was determined to be negative, indicating the spontaneous nature of the sorption process. The results of the present study suggest that pomegranate peel waste can be used beneficially for nickel removal from aqueous solution. © 2009 Elsevier B.V. All rights reserved.

Minocha A.K.,Central Building Research Institute CBRI | Bhatnagar A.,Central Building Research Institute CBRI
Research Journal of Environmental Toxicology | Year: 2010

In this study, the results of the studies exhibiting the effect of addition of varying concentrations of arsenic (V) on the initial and final setting time and compressive strength of 43 grade ordinary Portland cement have been presented. Efforts have been made to establish a quantitative correlation between the concentrations of As (V) used and the intensity of any change in above properties of the cement. Arsenic is present in ground water in a wide area of West Bengal (India) in lower concentrations and we have tried these concentrations also for this study. Sodium hydrogen arsenate (Na 2HAs0 4.7H 20) has been taken in the concentration range 0.1-500 ppm and the results of these investigations are reported in this study. The results show that As (V) is bearable up to 500 pm concentration, without any considerable change in any characteristics of the cement. © 2010 Academic Journals Inc.

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