Abstract
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Highlights
In the case of rapid heating of concrete with high power microwaves, evaporation/condensation of water occurs inside the porous material and leads to high thermal stress and pore pressure
Temperature increase For the maximum power density of q = 70 MW/m3 with ∆t = 10 s of heating, with constant thermal properties and an adiabatic system, the temperature increase can be estimated from energy conservation during this amount of time: q∆t with ρ = 2400 kg/m3 and cp = 800 J/(kg.K)
A coupled multiphysics model based on heat an mass diffusion equations was developed in order to compute the total stress and to compare the thermal stress with the pore pressure
Summary
Benjamin Lepersa,∗, Aditya Putrantob,c, Martin Ummingerd, Guido Linka, John Jelonneka aKarlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology, Eggenstein Leopoldshafen, 76344, Germany bMonash University, Dept. Of Chemical Engineering, Clayton Campus, Melbourne, Victoria 3800, Australia cParahyangan Catholic University, Dept. Of Chemical Engineering, Jolan Ciumbuleuit 94, Bandung, Indonesia dKarlsruhe Institute of Technology, Institute of Concrete Structures and Building Materials, Karlsruhe, 76131, Germany
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