Flexural behavior of fly-ash based geopolymer concrete beam and its potential for structural members

Abstract

Flexural behavior of fly-ash based geopolymer concrete beams prior to yielding was investigated. The authors conducted four-point bending loading tests and finite element analyses of the geopolymer concrete and conventional cement concrete beams. The deflection and maximum crack width of the geopolymer concrete beams subjected to bending moment based long/short-term allowable stress were similar to those of conventional concrete beams, and it is revealed that they had applicability as flexural members. The test results showed the bending moment-deflection relationship and the crack width can be predicted except for the flexural yield deflection by the AIJ design standard for reinforced concrete.