The Research Of Mechanical Properties And Ballistic Resistance Of Ultra-high Strength Portland Concrete

Armor material is moving in strengthening and toughening, lightweight, multifunctional, and highly efficient direction. This paper is based on the current preparation of high-strength concrete principles, which used high hardness and high strength aggregates, full activity of siliceous material in the structure during the formation of silicate-based physical and chemical effects and advantages, preferred superplasticizer ensure ultra-high strength Portland to have a good working of concrete. Add a different aspect ratio and volume ratio of steel fibers, in order to attain the best high strength Portland concrete reinforcing, toughening and crack resistance effect. With a variety of molding patterns and hydrothermal synthesis conditions to prepare 150-350MPa grade low density (compared to ceramic armor materials), low cost and high toughness of ultra-high strength Portland concrete.Using stereo microscope, XRD, SEM, and other modern physical and chemical analysis methods, with the condition of hydrothermal synthesis, the autoclave time on the high intensity of the process of hydration and hardening of Portland concrete, hydration products, the type of microstructure and structural characteristics, Analysis of microstructure and macroscopic mechanical properties of the relationship.12.7mm armor-piercing incendiary bombs and 105 simulated bombs normal incidence ultra-high intensity silicate concrete targets for anti-missile test, analysis of target, projectile, backplane failure mode, to discuss Target ballistic mechanism of super-Portland concrete is high strength protection factor influencing factors, compared with ceramic armor.Text main results are as follows:1. Obtain the optimal mixture ratio:Ⅰ-type high-strength aggregate:sand:cement: silica fume:quartz powder:water-reducing agent:water-cement ratio:Steel Fiber= 0.41:0.82:1:0.3:0.32:3%:0.17:3%;2. Based on hydrothermal autoclave curing method, obtained compressive strength of 150～350MPa, flexural strength up to 20-42MPa concrete products of high strength Portland;3. Ultra-high Strength Portland 12.7mm armor-piercing incendiary Concrete Armor protection coefficient of 1.75,105 anti-missile protection factor of at least 3.0 simulation, comparable with normal ceramic armor.