earticle

영어

The purpose of this study is to investigate the fire resistance of cement mortar using discarded EPS powder to improve fire resistance performance of concrete. Experimental results show that the fluidity of mortar using discarded EPS powder in particle is superior even though cementitious manufacture using traditional fibriform fireproof material has problems, fire-ball and lowering fluidity, coming from the reduction of dispersibility of a fiber. Also, cement using discarded EPS powder has same strength revelation with non-using discarded EPS powder up to 0.9% of fiber mixing ratio. Strength properties of mortar using discarded EPS powder in high temperature is better than no using it. Which shows that fire resistant performance is improved as residual compressive strength of mortar increases against non using discarded EPS between 0.3% and 0.6% of replacement ratio. But strength reduction occurs by heating because a lot of porosities are made on cement manufactures by melting of polymer powder to 1.2% of replacement ratio. According to the result, Discarded EPS powder can be used like a fireproof material. It is thought that it will be necessary to study for properties of the fire resistance by using various shape of powder and of spalling resistance of high strength concrete.