活性粉末混凝土抗冲击性能研究

STUDY ON RESISTANCE OF REACTIVE POWDER CONCRETE TO IMPACT

为验证新型遮弹材料钢纤维活性粉末混凝土(RPC)的抗冲击性能,利用自行研制的含纤维率为5%的RPC试件进行多组侵彻与接触爆炸试验。利用弹径分别为57与80 mm的半穿甲弹与钻地弹进行侵彻试验,2种实弹的着靶速度分别为300～600与800～900 m/s。通过将RPC试件的多组侵彻试验数据与利用经验公式计算所得半穿甲弹侵彻C30钢筋混凝土的深度以及钻地弹侵彻C30钢筋混凝土的试验数据进行对比分析可知,该RPC材料的抗侵彻性能是C30钢筋混凝土的2倍左右,同时验证用于计算RPC侵彻深度的理论公式的正确性,并分析了影响RPC抗冲击性能的因素。利用质量为0.5～3.0 kg的多组TNT炸药进行接触爆炸试验,通过将RPC试件的多组接触爆炸试验数据与利用经验公式计算所得的C30钢筋混凝土接触爆炸结果进行对比分析可知,该RPC材料的抗侵彻性能是C30钢筋混凝土的3倍左右,同时得到该RPC材料的爆炸压缩系数为0.042,填补了国防工程设计中的空白。

In order to validate the resistance of steel-fiber reactive powder concrete（RPC） to impact,a group of tests on RPC with 5% steel-fiber under penetration and contact detonation are conducted.The penetration tests are carried out by the semi-armor-piercing bullets with the diameters of 57 mm and earth penetrator with the diameters of 80 mm.Velocities of the two kinds of projectiles are 300-600 m/s and 800-900 m/s,respectively.According to the analysis and contrast between the test data of RPC samples and the calculation results for C30 reinforced concrete by using experiential formula under penetration,it is proved that the resistance of steel-fiber RPC to penetration and contact detonation is about 2 times against that of C30 reinforced concrete.The theoretical calculation formula for penetration in RPC is also validated to be precise by tests.The tests of contact detonation are conducted by TNT with the mass between 0.5 kg and 3.0 kg.Through analysis and contrast between the test data of RPC and the calculation results for C30 reinforced concrete by using experiential formula under contact detonation,it indicates that the resistance of steel-fiber RPC to contact detonation is about 3 times against that of C30 reinforced concrete.The factors of resistance of RPC to impact are analyzed.The blasting compressive coefficient 0.042 is obtained for RPC,which fills up the gap in structural design for protective building engineering.