Experiments and Mechanical Simulation on Bubble Concrete: Studies on the Effects of Shape and Position of Hollow Bodies Mixed in Concrete

This paper proposes a new type of lightweight concrete called bubble concrete, which was developed by mixing with high-strength hollow bodies. In the present study, concave and spherical steel bodies were used not only to form multiple cavities in but also transfer internal stresses. Through compression tests, shape effects distribution on strength Young’s modulus investigated. addition, mechanical characteristics simulated nonlinear elastoplastic finite element analysis study stress failure mechanism. The results indicate that proper combination, can reduce its density 1.971–2.003 g/cm3 (83.3–84.7%, compared control concrete) reaches 27.536–28.954 N/mm2.