INVESTIGATION ON USE OF E-WASTE FOR CORROSION PROTECTION IN RC STRUCTURES
IR@CBRI: CSIR-Central Building Research Institute, Roorkee
View Archive Info| Field | Value | |
| Creator |
RAWAT, ANUJAY
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| Date |
2017-07-31T06:44:09Z
2017-07-31T06:44:09Z 2017-07-31T06:44:09Z |
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| Identifier |
http://hdl.handle.net/123456789/1639
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| Description |
Thesis Submitted to AcSIR for the Award of the Degree of MASTER OF TECHNOLOGY
in
BUILDING ENGINEERING AND DISASTER MITIGATION
The generation of e-waste has increased many folds in the recent years owing to the technological development across the globe and India’s prominent presence in the IT sector. The recycling of e-waste involves high cost in developed countries and is therefore sent to the developing countries for recycling and disposal. Due to the hazardous nature of e-waste, it endangers human-health and environment. So, there is an immediate need to find a solution for e-waste disposal. Printed Circuit Boards (PCBs) are a major component of every electrical equipment and disposal of PCBs is the most difficult task due to its complex composition of metals and plastics. A heterogeneous mixture of metals can be easily separated from plastics by milling of the PCBs and is conductive in nature. The metals and plastics can be recycled and can be used in different fields according to their properties. Concrete is the most abundantly used building material and its durability is to be ensured to avoid deterioration, and minimise repairs and casualties. Corrosion of reinforcing bars in concrete is the biggest durability issue faced by the construction industry. To control and prevent corrosion, various electrochemical techniques are employed which requires a costeffective and efficient anode to supply external current. Being the most important component of the protection system, development of newer anodes is the hot topic for research across the globe. The present study is aimed to explore the possibility to use e-waste metallic powder as conductive fillers to develop a cementitious anodic overlay. This thesis describes the work carried out to achieve the aim. The cement composite was developed by use of e-waste metallic powder. The use of lower percentages of e-waste (< 25% by volume of cement composite) does not reduces the resistivity of the cement composite by great extent due to lower amount used and the size of the metal particles. So, to further reduce the resistivity and to study the effect of addition of higher percentages of e-waste, graphite powder was used in combination as a conductive filler. The optimum combination identified on the basis of most preferential response of compressive strength and resistivity was 20% (by volume) e-waste metallic powder and 30% graphite powder. The compressive strength of the anode developed was 27.4 MPa and the resistance of the applied layer is 2.37 kΩ. Performance evaluation of anode layer was conducted by using various non-destructive electrochemical techniques like polarisation studies, linear polarisation measurements and electrochemical impedance spectroscopy. The developed anodes was found to meet the various performance criteria for anodes used in ICCP. |
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| Language |
en
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| Subject |
e-Waste Generation
e-Waste Composition CSIR-CBRI 2017 M.Tech Thesis e-Waste Hazards Effect of e-waste on concrete and mortar properties Corrosion in RC Structures Mix Proportion, Casting and Curing |
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| Title |
INVESTIGATION ON USE OF E-WASTE FOR CORROSION PROTECTION IN RC STRUCTURES
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| Type |
Thesis
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