טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentBenamou David
SubjectImpact Resistance of Dual-Layered Concrete Barriers
DepartmentDepartment of Civil and Environmental Engineering
Supervisors Professor Avraham Dancygier
Professor Amnon Katz
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

The resistance to non-deforming projectile impact of double-layered, reinforced high performance concrete (HPC) barriers was studied experimentally. The methodology of this study consisted of comparative tests of 800X800X200 mm3 reinforced concrete plate specimens with various mix ingredients. The specimens were subjected to an impact of “reference projectiles”, accelerated to different velocities by means of a gas gun system. The influence of aggregate size, use of fibers and cast in layers was evaluated. Results include the perforation limit and performance under impact, determined by damage records of the different specimens. Analysis of the results revealed also the different effects of mix ingredients of the front and rear layers on the barriers performance. Among these, it was found that steel fibers and appropriate use of large aggregates in different layers can enhance the overall impact resistance. Analysis of the results included also assessment of the thickness reduction that can be obtained by applying these findings.