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Concrete based on polyurethane system
Published in
Volume: 5.0
Issue: 6.0
Pages: 39.0 - 43.0
Concrete is one of the popular construction material used all over the world. But, over the last few decades,polymer concrete is being introduced in order to fulfil various constructional requirements (such as zero water absorption,quick setting time, earthquake resistance, impact barriers, high flexural strength, chemical resistance, etc.) The objective ofthis project is to improve the properties of concrete by incorporating polymer system so as to make it suitable forapplications like industrial flooring, thin section precast walls, etc. The project aims at evaluating compressive strength andwater absorption of polymer based concrete system over conventional concrete with and without fibrous reinforcements. Thesystem consisted of Polyurethane (water based emulsified resin), hardener, white cement, fine silica and fibrousreinforcement (polyester fibres).Overall, six formulations with varying fibre content were used for the studies. The standardsamples based on conventional concrete as well as polyurethane based concrete system were casted and subsequently testedfor compressive strength and water absorption after 28 days’ post casting. In both the cases, it has been observed that thecompressive strength did not increase drastically with varying content of polyester. The polyurethane based concrete systemhas very low set (curing) time as compared to conventional concrete. The compressive strength achieved by polyurethanebase concrete within 3 days was around 80% of its total strength (28 days) while conventional concrete achieved strengtharound 60% of its total strength within 7days of time. In case of conventional concrete there is necessity of water for itscuring while polyurethane based concrete water present as dispersion medium itself serves the required purpose. It was alsoobserved that polymer system based concrete has compressive strength comparable with M35 mix design of conventionalconcrete. Hence, using polyurethane based concrete material for ordinary and standard conventional concrete applicationscan be beneficial.
About the journal
JournalInternational Journal of Advances in Mechanical and Civil Engineering
Open Access0