Influence of Nano-Clay on Microstructure and Mechanical Properties of Fiber-Reinforced Cement Mortar at Elevated Temperature

A detailed experimental studies on use of cement as partial replacement with ground granulated blast furnace slag along with nano-clay and polypropylene fibers to improve bonding properties and shrinkage properties of cement mortar at elevated temperature were carried out in the Department of Civil Engineering, Bangalore University, Bangalore, Karnataka, India. The testing specimens casted and tested as per IS specifications, cubes (70.6 mm), cylinders (100 mm diameter and 200 mm height), prisms (160 mm length, 40 mm width, and 40 mm depth), with cement mortar mix 1:3, and polypropylene fibers (0.25% by weight of cement) all the test specimens are subjected to at elevated temperature varying from 200, 400, 600 and 800 ℃, respectively. Retention time of 2 h is considered in the oven with respect to temperature and then strength properties at normal temperature as well as at elevated temperature were studied. The test results show that there is significant resistance in the strength properties can be resisted up to 400 ℃ then decrease in strength with rise of temperature. Scanning electron microscope and EDX were considered for morphology and mineral composition of modified cement mortar at normal temperature and elevated temperatures.