Investigation in to flexural fatigue of concrete with glass and rubber aggregates

Wells, Robert (2016) Investigation in to flexural fatigue of concrete with glass and rubber aggregates. MEng dissertation, University of Portsmouth.

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    In recent years’ waste tyres have become a pressing environmental issue around the world. Every year millions of waster tyres are disposed of, and in many cases they are simply stockpiled or burned. Both these methods present an ecological threat. Burning tyres is against legislation in many places as it releases toxic chemicals into the atmosphere that are harmful to humans and animals. Stockpiling tyres is causing an environment for mosquitos to thrive and spread disease. In the EU it has been estimated that 1-2% of the most developed countries solid waste in used tyres and 355 million tyres were produced in 2014. This increasing figure is going to lead to more waste tyres damaging the environment. Fatigue is a problem that structures suffer from especially if subjected to traffic loads and can cause the structures to fail, especially if the structures are made from concrete which is weak in tension. Studies into rubber properties have shown positive signs that it can help to absorb energy when used as an aggregate in concrete, however it also reduces the properties of strength. Investigations into glass as an aggregate has shown that partial fine aggregate replacement increases the strength of the concrete. Potentially incorporating glass and rubber as partial aggregate replacements could reduce the susceptibly of concrete to fatigue whilst also maintaining strength. In this report investigations into the flexural strength, compressive strength and flexural fatigue of concrete with rubber as well as rubber and glass as aggregate replacements occurred. The investigations showed promising signs that rubber increases the fatigue life of concrete, yet the inclusion of glass as well reduced this. However, using rubber as an aggregate reduced the flexural strength, this was the same when glass was included. Compressive strength was reduced when rubber was used but it increased when glass was included.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Beth Atkins
    Date Deposited: 01 Sep 2016 10:07
    Last Modified: 01 Sep 2016 10:07

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