Evaluation of Mechanical Properties and HPM Pulse Shielding Effectiveness of Cement-Based Composites

In today’s world, protection against electromagnetic waves, including high-power microwave (HPM) pulses, is becoming increasingly important. Hence, the aim of this research was to select an absorbing admixture, which, when used in appropriate quantity, improves effectiveness shielding waves and, at same time, satisfies requirements that are important from a construction engineering point view. Altogether, eighteen admixtures (including two types fibers), added different quantities, and three aggregate have been tested. The compressive flexural strength test results show greatest improvement tested mechanical properties achieved case such as steel fibers, carbon black P803, ferrite, fly ash. Regarding effect on effectiveness, best were obtained for graphite form flakes, powder, N990 polypropylene hybrid admixtures, i.e., ashporite with flakes. both HPM pulse effects specimens high fiber content.