Study On Stealth Performance Of Reactive Powder Concrete

With the rapid development of radar detection system, various ground military targets of the Army, Navy and Air force are in serious threat in modern warfare. Now they will be hit just after to be found, then they will be destroyed. In order to antagonize the effective detection of radar, a wide range of anti-radar technologies have been developed in recent years. As one of the effective means of improving the survivability of strategic ground military targets, stealth concrete is attracting much more attention of many countries all over the world. Stealth concrete is primarily used for the construction of military airports, military bunkers and other military protection works. Once these military facilities are destroyed, the military strength will be reduced greatly and it may even lead to the failure of the whole war. Currently, the studies on stealth concrete mainly focused on stealth cement mortar and it is incapable to meet the two main functional needs, which are better stealth performance and structure bearing capacity of military objectives. Thus the investigations on"high absorption, broadband"structural stealth concrete to anti-radar are imperative.This paper first introduced radar detection principle and anti-radar detection technology. On the base of radar equation and RCS measurement method of absorbing materials, a stealth performance evaluation formula of absorbing material was deduced. Then Reactive Powder Concrete (RPC) with good workability and mechanical properties was prepared as matrix material of stealth concrete. The mechanical properties of RPC with different absorbing materials were examined and the absorbency of RPC with different absorbing materials was measured by far-field radar method. The RPC incorporated with single-doped, mixed and layered absorbing materials were comparatively analyzed, and the basic laws of the effects of various absorbing materials on the stealth performance of stealth RPC were concluded. Finally, all stealth performance of RPC doped with different absorbing materials were calculated by using the stealth performance evaluation formula. The results showed that the RPC layered-doped F powder, graphite and steel fiber can distinctly improve the stealth performance of RPC at low-frequency radar and also can meet the needs of"high absorption, broadband"of radar absorbing materials.