Author(s): A. Pczieczek, C. Effting, A. Schackow, I. Ribeiro Gomes, and D. V. Ferronato da Silva



This work aimed to analyze the physical and mechanical properties of mortar with the addition of fly ash and rubber concentrations used on building walls.

The mortars had 5 and 10% of fine aggregate mass replaced by rubber and added fly ash in proportions of 10 and 20% according to the volume of cement. Ground fly ash addition in the mortar, in turn, increased the compressive strength by 18% at 28 days compared to the reference mortar, assuring a greater durability against sulfate attacks and presenting lower mass loss during exposure to sodium sulfate.

The mortar containing 20% of ground fly ash and 5% of rubber presented tensile adhesion strength of 0.33 MPa at 65 days. A numerical simulation of the mortar microstructure was carried out using the finite element method to study its thermomechanical behavior. Stress distribution and cracking field of the model were also obtained.

Keywords: coating mortar; fly ash; mechanical resistance; numerical simulation; tire waste

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