Fire Resistance of Sustainable Mortar with Plastic Waste Aggregates

The increasing attention on construction sustainability asks for the definition of new “green” materials. The cement content reduction is often regarded as a good way to reduce CO2 consumption. The mechanical performance of this kind of materials have been deeply investigated in the literature with regard to standard condition. Nevertheless, also accidental conditions, like fire, should be considered in the design of construction and the behavior of these new sustainable materials at high temperature need to be investigated as well. The paper studies the bending behavior at high temperature of 4 different types of cement mortars obtained substituting different portion of cement with plastic particles coming from recycling processes. The experimental campaign considers three different percentage of cement substitution (5, 10 and 20%), in addition to the reference mortar (only cement); the results of bending tests in residual condition after the exposure at different maximum temperatures (20, 200, 400 and 600 ℃) are presented and discussed.