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Flexural behaviour of steel and macro-PP fibre reinforced concretes based on alkali-activated binders

2019; Elsevier BV; Volume: 211; Linguagem: Inglês

10.1016/j.conbuildmat.2019.03.227

1879-0526

Andreas Köenig, Annemarie Wuestemann, Federico Gatti, Laura Rossi, Florian Fuchs, Dustin Fessel, Felix Dathe, Frank Dehn, Fausto Minelli,

Magnesium Oxide Properties and Applications

In the following study, the mechanical properties of steel and macro-PP fibre reinforced concretes based on an alkali-activated slag (AAS), an alkali-activated fly ash (AAFA) and an Ordinary Portland Cement (OPC) were studied. The influence of different fibre materials (macro-PP fibres and steel fibres mix) and contents (0, 0.3 and 0.6 vol%) on the compressive, splitting tensile and flexural tensile strength was investigated at an age of 28 days. The obtained load-deformation curves and the characteristic post crack behaviour (according to EN 14651) were interpreted by additional analyses of the bond behaviour via micro X-ray computer tomography (μXCT) and scanning electron microscopy (SEM).