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|Title:||USE OF POLYMER IMPREGNATION AS A METHOD OF IMPROVING PERFORMANCE OF CONCRETE AND OTHER CEMENTITEOUS MATERIALS IN BUILDINGS||Authors:||M.A.W.R. FERNANDO (FERNANDO MIHINDUKULASURIYA W R)||Issue Date:||2001||Citation:||M.A.W.R. FERNANDO (FERNANDO MIHINDUKULASURIYA W R) (2001). USE OF POLYMER IMPREGNATION AS A METHOD OF IMPROVING PERFORMANCE OF CONCRETE AND OTHER CEMENTITEOUS MATERIALS IN BUILDINGS. ScholarBank@NUS Repository.||Abstract:||Previous studies conducted over the last two decades has shown that performance of concrete and other cementitious materials can be tremendously improved by polymer impregnation. Both new as well as considerably deteriorated concrete and cementitious materials can be impregnated with polymers to enhance the strength, impermeability, resistance to chemical attack and durability. However use of polymer impregnation as a method of enhancing performance of concrete and cementitious materials, is used seldom in Singapore's building construction environment. This is mainly due to a lack of knowledge about the benefits and the application methods involved. Polymer impregnation requires handling of special materials, special equipment and procedures. There is a need for simpler application procedures. So it is important to study the effectiveness of these simpler methods for the purpose. Also there is a lack of information regarding the serviceability parameters such as fire endurance and toxicity of gases produce as a result of combustion. There were only very few projects involving polymer impregnation in Singapore. All these projects used polymer impregnation to strengthen existing reinforced concrete structures. This study is focused on areas where a gap in knowledge regarding the effectiveness of simpler surface application methods and serviceability parameters exists. This study revealed that surface application methods such as monomer ponding, covering with monomer soaked sand and covering with monomer soaked cloths, are effective and can be used to enhance durability of concrete/mortar by making the surface layer less pervious. In this study polymer solutions had been used for surface application of concrete/mortar samples and found to be effective than the monomer application. Also it has been found in this study that fire endurance properties of polymer impregnated concrete/mortar is excellent up to 400¡C. At temperatures around 500¡C polymer impregnated concrete/mortar behaves similar to normal concrete. Temperatures above 500¡C polymer impregnated concrete/mortar behaves worse than normal concrete. This study shows that Toxicity Index ofcombustion products from burning of polymethyl methcrylate is 1.41 and the main contributory component to toxicity index was carbon dioxide.||URI:||http://scholarbank.nus.edu.sg/handle/10635/151563|
|Appears in Collections:||Master's Theses (Restricted)|
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