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Properties of Self :Compacting Concrete using waste rubber tyres as partial replacement for coarse aggregate - Literature review Example

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Properties of Self :Compacting Concrete using waste rubber tyres as partial replacement for coarse aggregate

They occupy space and are a bad sight. This is besides the fact that they offer perfect breeding grounds for pests (Appleby, 2004, Pg.200). Mosquitoes, rats, mice are just but a few. Some of these such as mosquitoes spread diseases such as malaria. Rice and mice is a nuisance. The accumulated heaps of tires are prone to fires. This is because rubber is a substance that can easily catch fire. Once the fire starts, the destruction is always very devastating. They are difficult to put off and leave behind a trail of destruction. The smoke from the fires pollutes the environment. It reduces visibility and releases harmful substances into the atmosphere. All these negative effects of waste rubber lead to the need for a lasting solution (Barragan, 2005, Pg.45). Self-compacting concrete is one of such solutions. It refers to a form of concrete that does not require compression machines to be compressed into the building blocks. It flows freely under its own weight and keeps a uniform mixture composition. It has three major characteristics. It fills the building space easily, passes through the building space easily, and maintains its homogenous nature throughout the whole process. Self-compacting concrete can change shape in order to attain the shape of the destination place. It has a deformability aspect. Besides these three, it has other characteristics. It retains its characteristics even when the matter of other component material changes. Self-compacting concrete retains all its properties and is always very stable. All these properties of self-compacting concrete is very incompatible (Bui, 1999, Pg. 356). The filling ability of self-compacting concrete is of an interesting nature. Self-compacting concrete flows into the designated region without segregation. The friction between particles in the self-compacting concrete is minimized. This is done by use of superplasticiser. Anyone can argue that addition of water would produce the same effect. However, water reduces viscosity and weakens the mixture. In addition, the self-compacting concrete loses its durability. Hence, it is not advisable to add water (Felekoglu, 2008, Pg.54). The size of the particles also influences the filling ability of self-compacting concrete. The finer the particles are the less the friction between them and hence a greater filling ability (Bennenk, 1999, Pg.544). The self-compacting concrete must have the ability to penetrate all the available spaces of the building blocks. The particle composition of the self-compacting concrete plays a vital role in determining this property. The concrete is mainly composed of mortar and coarse aggregate. On approaching an opening, the different speeds of these compositions result in a collection of aggregate at the opening (Jin, 2002, Pg.192). This will block the passage of other particles. The blocking is determined by the size of the coarse aggregate, its shape and content. This means that the smaller the size the more effective the self-compacting concrete will be. A paste can also be used to prevent blocking of the coarse aggregate content. It must have a certain level of viscosity in order to achieve this (Bui, 1999, Pg.45). Segregation mainly involves the detachment of the solid particles from the self-compacting concrete. It usually takes place during spacing (Bostrom, 2003, Pg.34). The coarse aggregate separates from the water. This water is referred to as bleeding water. It is usually trapped in the ...Show more


Compacting Concrete Waste Rubber Tyres as Partial Replacement for Course Aggregate Name Institution Literature Review Huge amounts of rubber are produced as waste annually. This is mostly common in countries that are already developed. Such countries include Australia where in 2006 twenty million tires were produced as waste…
Author : carminelakin
Properties of Self :Compacting Concrete using waste rubber tyres as partial replacement for coarse aggregate
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