Dynamic mechanical properties of geopolymer concrete after water immersion》.pdf

Available online at CERAMICS INTERNATIONAL Ceramics International 41 (2015) 11852– 11860 /locate/ceramint Dynamic mechanical properties of geopolymer concrete after water immersion a,n a,b a a Weibo Ren , Jinyu Xu , Junliang Liu , Haoyang Su aDepartment of Airfi eld and Building Engineering, Air Force Engineering University, Xi ’an 710038, Shaanxi, China bCollege of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi’an 710072, Shaanxi, China Received 17 December 2014; received in revised form 12 May 2015; accepted 29 May 2015 Available online 6 June 2015 Abstract This paper aims to investigate the influence of water immersion on dynamic mechanical properties of geopolymer concrete (GC). Dynamic compressive tests on specimens placed indoors (GCN) and specimens with water immersion (GCW) were conducted by a split Hopkinson pressure bar system. The results indicate that the dynamic strength and impact toughness of GCN and GCW display an increasing trend as strain rate increases, while the elastic modulus is not rate-sensitive since no obvious tre