Experiment Investigation of Protecting the R.C. Structure from Heat Exposure by Using Composite Materials

Fibre-reinforced polymers (FRP) strengthening systems are mainly used to retrofit existing and deficient structural elements. The last two decades have seen increasing applications of fibre-reinforced polymer material in civil engineering structures due to their many advantages over traditional strengthening and reinforcing materials. A large number of destruction caused by fire are being reported in many parts of world recently. The most common causes being material degradation, electrical device malfunctions, lightning, etc. The focus of the study is about how to protect the retrofitted structural element by insulation material and study on thermal and chemical property of retrofit material, adhesive material and insulation material. So the development for various types of thermal insulation material plays a vital role in protecting the structural element from thermal destruction. This paper provides a model analysis of insulation materials used in buildings based on various factors such as thermal resistance, cost, moisture and so on. The benefits and drawbacks for each insulation type are studied, providing a way to qualitatively optimize the selection of insulation material. In this paper, the temperature dependence of thermal conductivity on the performance of fire protecting material is investigated on a model with different cases. A structural model core as a concrete material which is surrounded by the FRP and FRP is surrounded by insulation material. This composite structure is tested under elevated temperature and their performance of the composite layer is analysed. The change in mechanical properties under thermal is studied and various outcomes are projected as result when such materials are used to protect a structural element from fire load. Efficiency of thermal insulation is determined by its thermal conductivity and ability to retain its thermal properties over time. In this paper, the factors that influence the thermal conductivity of different types of materials are investigated. The studied materials are listed and grouped under the various factors. Among the materials, the best suitable insulation material is suggested for the fire protection of the retrofitted structural element.