Experimental investigation of ultra-early-strength cement-based selfcompacting high strength concrete slabs(URCS)under contact explosions  

作　　者：Wei Wang Qing Huo Jian-chao Yang Jian-hui Wang Xing Wang 

机构地区：[1]Key Laboratory of Impact and Safety Engineering,Ningbo University,Ministry of Education,Ningbo,315211,Zhejiang,China [2]Institute of Defence Engineering AMS,PLA,Luoyang,471023,China [3]Institute of Advanced Energy Storage Technology and Equipment,Ningbo University,Ningbo,315211,Zhejiang,China

出　　处：《Defence Technology（防务技术）》2023年第6期326-339,共14页Defence Technology

基　　金：financial support from National Natural Science Foundation of China(Grant No.11302261 and No.11972201);supported by the project of Key Laboratory of Impact and Safety Engineering(Ningbo University),Ministry of Education.The project number is CJ202011.

摘　　要：In this paper,UR50 ultra-early-strength cement-based self-compacting high-strength concrete slabs(URCS)have been subjected to contact explosion tests with different TNT charge quality,aiming to evaluate the anti-explosive performance of URCS.In the experiment,three kinds of ultra-early-strength cement-based reinforced concrete slabs with different reinforcement ratios and a normal concrete slab(NRCS)were used as the control specimen,the curing time of URCS is 28 days and 24 h respectively.The research results show that URCS has a stronger anti-explosion ability than NRCS.The failure mode of URCS under contact explosion is that the front of the reinforced concrete slab explodes into a crater,and the back is spall.With the increase of the charge,the failure mode of the reinforced concrete slab gradually changed to explosive penetration and explosive punching.The experiment results also show that the reinforcement ratio of URCS has little effect on the anti-blast performance,and URCS can reach its anti-blast performance at 28 days after curing for 24 h.On this basis,the damage parameters of URCS for different curing durations were quantified,and an empirical formula for predicting the diameter of the crater and spalling was established.

关 键 词：Ultra-early-strength concrete slabs Blast load Contact blast Blast-resistant performance 

分 类 号：TU37[建筑科学—结构工程] E95[军事—军事工程]