Performance of Dosage of Ceramic Chopped Fibers in Aluminous Cement-Based Composites after Exposure to High Temperatures

摘要

The results of an experimental investigation of the influence of chopped alumina-silica bulk fibers on residual mechanical properties of lightweight cement-based composites for high temperature application are obtained in this paper. The matrix of studied specimens is based on calcium aluminous cement, because of its sufficient temperature resistance over 1400 °C. Thermal ceramic bulk fibers offer a maximum temperature range of between 1200° to 1500 °C. They also provide excellent chemical stability and resistance to the chemical attack. After the contact with oil or water, thermal and physical properties are fully restored after drying. The benefits of using ceramic bulk fibers were evaluated in terms of physical and mechanical testing; compressive strength, flexural strength and bulk density were determined on the different levels of temperature loading. The experimental composite recipes differed from doses of fibers, which are 0.0 %, 0.5 % and 2.0 % by volume.