Análise comparativa do comportamento balístico de concretos portland e geopoliméricos para blindagem arquitetônica

Abstract

This study addresses the use of geopolymeric concrete as architectural protection against projectiles impacts. The beginning of the work took place with a review of other studies on ballistic impact in concrete. The first observations have been impact tests into tablets using mortars. In sequence they were made small cylindrical bodies of evidence (Ø 5 cm, h = 5 and 10 cm) in concrete with the variation of the cement matrix, Portland cement and Geopolymer; the coarse aggregate, granite and basalt, were tested with impact of ammunition 7.62 X 51 JMF, for a better understanding of the material, their behavior and damage caused by the impact. After the preliminary phase study concrete slabs were made with Portland cement or Geopolymer, (50 x 50 x 100 cm) varying their type of aggregate, between granite and basalt, and the type of impactful ammo, between 7.62 X 51 JMF and 7.62 X 51 AP. The tests were conducted according to standard screening for ballistic impacts. As a result, the geopolymeric concrete with aggregate basalt met all the requirements for the use of ammunition 7.62 X 51 JMF, Level III protection in all tested environment. All plates tested were compared and analyzed with Portland cement concrete plates having such default behavior reference.